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Página Principal - Marcus Martins / Minas Gerais / São Paulo / BRASIL - English

 
 

Direcione corretamente a sua antena / Beam Headings Antenas - DX - Radioamadorismo - Cabos Coaxiais             

               Digite o seu localizador (GRID-LOCATOR) aqui:   utilize 6 digitos
kmMiles


Cálculo do Localizador (Grid-Locator) - autoria de PP5VX

Caso não saiba, digite abaixo a Latitude e a Longitude do seu QTH para calcular o seu localizador (GRID-LOCATOR) - após digitar pressione LOCATOR

Latitude (GMS)
Longitude (GMS)
 
IARU Localizador GRID-LOCator =
IARU GRID-LOCator com      digitos

(A reprodução dos textos abaixo está autorizada desde que a autoria seja preservada e mencionada - Direitos Reservados:  Marcus Martins - PY4SM / PY2DD)

       

ATENÇÃO :  A antena é o equipamento mais importante de uma estação de radio!

Uma antena é um dispositivo elétrico que converte energia elétrica em ondas de rádio, e vice-versa. É usado geralmente com um transmissor de rádio ou receptor de rádio. Na transmissão, um transmissor de rádio fornece uma corrente eléctrica oscilante em “frequência rádio” (isto é, uma elevada frequência de corrente alternada (AC)) aos terminais da antena, e a antena irradia a energia da corrente de ondas eletromagnéticas (ondas de rádio). Na recepção, uma antena intercepta alguma da energia de uma onda eletromagnética, a fim de produzir uma pequena tensão nos seus terminais, que é aplicado a um receptor para ser amplificado. Uma antena (sistema irradiante) não passa de um transformador de impedâncias que acopla a saída do transmissor com a impedância do espaço, conhecido como "eter", que é 377 ohms.

As antenas são componentes essenciais de todo o equipamento de radio (radiodifusão, televisão aberta, rádio bidirecional, receptores de comunicações, radar, telefones celulares, e as comunicações por satélite), bem como outros dispositivos, como abridores de portas de garagem, microfones sem fio, Bluetooth habilitado dispositivos, sem fios redes de computadores, monitores do bebê e etiquetas RFID em mercadorias.

Normalmente uma antena consiste de um arranjo de condutores metálicos (elementos), ligados eletricamente (muitas vezes através de uma linha de transmissão) para o receptor ou transmissor.

As antenas podem ser projetadas para transmitir e receber ondas de rádio em todas as direções igualmente (antenas omnidirecionais), ou preferencialmente em uma determinada direção (direcional). Neste último caso, uma antena pode também incluir elementos adicionais ou superfícies sem ligação elétrica ao emissor ou receptor, tais como elementos parasitas, refletores parabólicos, que servem para dirigir as ondas de rádio em um feixe ou outro desejado padrão de radiação.

As primeiras antenas foram construídas em 1888 pelo físico alemão Heinrich Hertz em seus experimentos pioneiros para provar a existência das ondas eletromagnéticas previstos pela teoria de James Clerk Maxwell. Ele publicou seu trabalho em Annalen der Physik und Chemie (36 vol., 1889).

Muitos radioamadores não observam com cuidado o fato de que a ANTENA é o equipamento mais importante de qualquer estação de rádio e apesar de terem excelentes equipamentos, não conseguem bons contatos e tampouco boas reportagens de sinal, pois é a antena que garante a irradiação total dos sinais transmitidos.

É sempre uma dúvida, mesmo para os mais experientes, decidir com qual antena irá operar. Consideramos que a mais simples e eficiente é, sem dúvida, a antena Dipolo. As antenas dipolo mais utilizadas são as "1/2 onda", ou seja, as que têm metade do comprimento da faixa em que iremos operar. Por exemplo, uma antena para a faixa dos 80 metros vai ter aproximadamente 40 metros de comprimento total. Uma antena para 40 metros terá 20 metros de comprimento. As antenas dipolo também podem ser montadas na posição de um V invertido. A forma para calcularmos a Dipolo é extremamente simples:

     Comprimento da antena = 142,5
                                                    f (
KHz)

Se quisermos construir uma antena dipolo para a faixa de 40 metros, deveremos definir qual é a frequência do "meio da faixa". Se o objetivo é operar preferencialmente em telegrafia (CW), a freqüência central é 7.025 kHz, isso porque a faixa de telegrafia vai de 7.000  até 7.050 kHz. Basta agora substituir na fórmula (f=7.025) e o resultado será: 20,28 (vinte metros e trinta e seis centímetros), ou seja, 10,14 (dez metros e 14 centímetros) para cada lado da antena. Dica: deixe uns 10 centímetros, a mais, em cada lado para facilitar o ajuste.

CALCULE SUA ANTENA PARA FREQÜÊNCIAS ATÉ 30MHZ (ANTENA DIPOLO  e  "V" INVERTIDO)


Digite a Frequencia desejada: Khz (exemplo: 7.025 - Use o ponto) 



O comprimento total da antena DIPOLO será metros.  Cada lado do dipolo medirá metros.
O comprimento total da antena "V" INVERTIDO será metros. Cada lado do dipolo em "V" invertido medirá metros.

 

Calcule sua antena VERTICAL

Divida a constante 71,5 pela frequencia em Mhz escolhida. Esta fórmula apresenta como resultado o comprimento do elemento vertical e dos
radiais ou plano de terra que devem ser 04 (quatro), como mínimo, para as antenas verticais.

 Exemplo do calculo de antena vertical para faixa de 10 metros: 71,5 / 28,400 =  2,517 metros de comprimento

 

 

  • Utilize cabo rígido comum de bitola 10, 12 ou 14 AWG na construção de sua antena dipolo. Use cabo coaxial de boa qualidade com impedância de 50 Ohms tipo RG 58 (fino) ou  RG-213 (grosso) para alimentar a antena (quantos metros forem necessários para alcançar o transceptor).  Para ajustar utilize um medidor de R.O.E. (relação de ondas estacionárias), inicialmente na freqüência escolhida onde deveremos ter o melhor rendimento (caindo gradativamente quando nos afastamos para cima ou para baixo). Os ajustes devem ser feitos (se necessários) reduzindo o seu comprimento em ambos os lados de 1 em 1 centímetro. Evite cortar o cabo, encurte a antena e enrole as pontas. Após cada redução, faça nova medição de R.O.E., (com muita  paciência) repita quantas vezes necessitar, até que a estacionária chegue no mínimo. É preciso muito cuidado para não ligar o transmissor quando a antena estiver sendo cortada! Sempre que possível, monte a antena o mais alto possível em relação ao solo. Bons QSO's e muitos DX's !

    Com a antena ajustada você já pode verificar as condições de propagação e, se desejar, acessar a lista de beacons-farois para aferir o rendimento de sua antena!

     

       dxswl_1.gif (3937 bytes)   

    CP5H Five-Band Trap Vertical Antenna 

    Diamond’s new CP5H is a five band (40M, 20M, 15M, 10M and 6M) trap vertical antenna with trap radials. Its light weight, 6.6 pounds, makes it very manageable during the installation process and will allow for a simple mast solution. It is 11.8 feet tall and the radials are 71” long and can be mounted 360 degrees around the antenna or concentrated on one side if you need to mount it close to a structure.
    Because of its light weight and the ability to concentrate radials on one side, the CP5H could be used in an antenna restricted situation where the mast was lowered on its side during daylight and raised while operating during the evening.

    Power handling: 500W P.E.P. @28/50MHz, 400W P.E.P. @14/21MHZ and 200W P.E.P. @7MHz.


    Special Features:

     Compact size
     Heavy-duty aluminum antenna sections
     Easy assembly
     No additional ground radials required
     Mounting hardware included

    Specifications:
     
    Frequency: 40m/20m/15m/10m/6m
    Power: 200/400/400/500/500
    Impedance (output): 50 ohms
    VSWR: 1.5
    Element Phasing: 1/4 wave
    Max Wind Rating: 80 mph (no ice)
    Mast Diameter Acceptance: 1.2" - 2.3"
    Overall Length: 11' 8"
    Weight: 6.6 lbs.
    Connector: UHF


    Diamond® Antennas are sold through authorized dealers.
    Contact one of your local Diamond® Antenna Dealers for current price & availability.

    Construa um BALUN de banda larga (tipo choque)

    Veja abaixo como é simples construir um BALUN usando o próprio cabo coaxial que alimenta a antena. Deve ser instalado o mais próximo da antena.

      

    O BALUN é formado por uma bobina que é feita com o próprio cabo. Seu diâmetro deve ser de 10 cm para os cabos finos como RG58 e de 15 cm para os cabos grossos como RG213. Para a utilização nas frequencias de 3,5 a 30 MHz, bastam apenas 10 espiras.

    Veja como soldar o conector ao cabo coaxial: clique aqui

    Antena portatil / movel para 6 e 10 metros - Dual Band (by VK5ZCB)

    Esta antena foi construída usando os "restos" de uma velha antena vertical de 5/8 para a banda de 2 metros. Durante os anos de 2013 e 2014 pude utiliza-la obtendo ótimos resultados. Simplicidade e facilidade de construção: por exemplo, a bobina L2 pode ser enrolada em um pedaço de PVC de 20 milímetros

    Veja abaixo todos os detalhes para sua montagem:

    O comprimento do cabo coaxial

    A importancia do comprimento do cabo coaxial se baseia no  conceito de que a freqüência resonante em uma linha de transmissão em que seu comprimento seja de meia-onda ou multiplos desta, deverá obrigatoriamente "entregar" a mesma impedancia em ambos os lados desta linha de transmissão.

     

    Portanto, dentre os cuidados que se deve tomar com as antenas, a medida dos cabos coaxiais é uma das mais importantes. Os Cabos coaxiais usados pelos radioamadores em seus equipamentos Transceptores, devem sempre estar cortados na freqüência certa, pois assim garantimos uma Relação de Onda Estacionaria (ROE) baixa nos equipamentos.

    cabocoaxial-4sm.jpg (6459 bytes)

    Adota-se como norma geral o uso de múltiplos de 1/2 onda. O cálculo para se chegar ao múltiplo de 1/2 onda para uma freqüência qualquer é o seguinte:

     antena1.jpg (3951 bytes)

                 Onde:

                          Múltiplo de 1/2 onda = Resultado em metros

                          Velocidade da luz = 300.000 Km/segundo

                          Freqüência = Freqüência escolhida em Khz

    Fator de velocidade do cabo coaxial (escolha o fator correspondente):

           cabo-rfs.gif (2483 bytes) RG-58 e RG-213  =  0,67

    rgc213.jpg (4349 bytes) RGC-213  =  0,82  

    Exemplo de cálculo-1:

    Digamos que você vá instalar uma antena para a banda de HF 40 Metros (7.000 a 7.300khz). Suponhamos que a distancia
    entre  o rádio e a antena seja de 20 metros e, o cabo coaxial escolhido tenha sido o RG-58 por se tratar de um cabo coaxial mais fino e flexivel.

    Para este caso a freqüência
    que utilizaremos no calculo é  7.150Khz.

    Cada Múltiplo de 1/2 onda terá = 300.000 / 14.350) x 0,67 =  14,06 metros.

    Neste caso o cabo coaxial terá o comprimento total de: 14,06 metros x 2 = 28,12 (vinte e oito metros e doze centimetros).

    Ou seja: 2 multiplos de 1/2 onda para a distancia de 20 metros entre o rádio e a antena.

     

    Exemplo de cálculo-2:

    Digamos que você vá instalar a mesma antena para a mesma frequencia, porém usará cabo coaxial RGC-213 por se tratar de um excelente cabo e de baixa perda. 

    Cada Múltiplo de 1/2 onda terá = 300.000 / 14.350) x 0,82 =  17,20 metros.  

    Neste caso o cabo coaxial terá o comprimento total de: 34,40 metros (trinta e quatro metros e quarenta centimetros).

    Ou seja: 12 multiplos de 1/2 onda para a distancia de 20 metros entre o rádio e a antena.

     

    Múltiplos de 1/2 Onda para cada uma das faixas de operação (centro da faixa)

    Cabo Coaxial RG-58 e RG-231

    Cabo Coaxial RGC-231

    Faixa de Operação

    Múltiplos (em metros)

    Faixa de Operação

    Múltiplos (em metros)

    80 metros

    27,16

    80 metros

    33,24

    40 metros

    14,06

    40 metros

    17,20

    20 metros

    7,10

    20 metros

    8,69

    15 metros

    4,75

    15 metros

    5,80

    10 metros

    3,53 

    10 metros

    4,33

    2 metros

    0,68

    2 metros

    0,84

    Obs: Para aplicações em HF multibandas, onde temos uma variedade de frequências, podemos ainda utilizar um Acoplador para compensar possíveis taxas de ROE elevadas.

    storm_27.jpg (8285 bytes)

    Antena STORM-27

    EXCELENTE -Antena Vertical para 10 e 11 metros - 500W

    Antena de dimensões reduzidas e grande eficiencia. A STORM é projetada para funcionar em qualquer condição de clima. Para melhoar seu funcionamento deve ser instalada em extremidade mais elevada quer seja em sua casa, barco, automóvel ou caminhão.

     

    Especificações Técnicas:

    • Antena Vertical - necessita de plano de terra
    • Resistente a chuva, minima resistencia ao vento
    • Nenhuma necessiade de ajuste de ROE
    • Completa - fornecida com todos os acessórios necessários
    • Cor preta

    Frequencia de trabalho

    27 a 29 MHz

    Potencia maxima aplicavel

    500 W

    ROE minima  

    1 ,1:1

    Ganho

    0.9 dB

    Tamanho (altura)

    1000 mm

     

     

    Cuidado com a Solda!

    Todo radioamador inevitavelmente se aventura a fazer uso do ferro de soldas e utiliza o nosso conhecido “fio de solda” formado por 60% de estanho e 40% de chumbo.

    É necessário muito cuidado no manuseio do “fio de solda”, pois poderá causar intoxicação devido ao chumbo podendo provocar anemia, danos ao sistema nervoso central e periférico, ás glândulas, rins, intestinos e ao sistema circulatório.

    Os vapores e fumaças da solda podem induzir asma ou seu agravamento. Vale salientar que essa fumaça toxica pode conter PVC devido às altas temperaturas de contato com o ferro de soldas.

    O olfato é o indicador mais seguro da existencia dessas fumaças - quem sente o cheiro, ao mesmo tempo está inalando a fumaça.

    E como poderemos nos defender dos riscos da solda?

    1)      Todas às vezes, após a solda e também antes das refeições subsequentes, deveremos lavar as mãos com agua abundante;

    2)      Manter sempre bem ventilados os locais onde efetuarmos soldagens;

    3)      Manter o menor contato possivel com o "fio de soldas" e com a pasta de solda;

    4)      Evitar a inalação dos vapores e fumaça de materiais, fios e componentes aquecidos durante a solda.

    Utilize o Antena Tuner Kenwood AT-250 com qualquer Radio

     

     

     

    1) Localize o conector ACC na parte traseira do AT-250

    2) Ligue o pino 3 ao terra (cuidado na identificação do pino 3 - veja o desenho acima)

    3) Conecte o AT-250 ao seu rádio através do cabo INPUT

    4) Conecte o cabo da antena ao AT-250 na ANT-1

    5) Coloque o interruptor RX em OUT

    6) Finalmente ligue o AT-250 à tomada de energia

     

    Passos para a sintonia:

    a) Coloque o AT-250 em POWER ON

    b) Coloque o AT-250 em TUNER ON

    c) Coloque o AT-250 em TUNE ON

    d) Coloque o AT-250 ANTENNA na ANT-1

    e) Coloque o AT-250 METER em SWR

    f) Coloque o AT-250 BAND na faixa desejada

    g) Ligue seu radio e coloque-o em AM ou FM para sintonizar

    h) Aperte o PTT e aguarde o AT-250 sintonizar automaticamente

    i) Observe que a estacionaria irá baixando até que a luz do TUNE se apagará

    j) Opere seu rádio normalmente

    k) Para nova sintonia, repita os passos acima

    Antena Loop de Alto Ganho

    Muitos dexistas encontram no seu dia-a-dia, vários projetos de antenas; algumas práticas, outras não! Na maioria das vezes todas as antenas funcionam porém diferentemente do modo para o qual foram projetadas. Antenas loop funcionam basicamente como campos magnéticos ressonantes que alimentam eletricamente nossos receptores. Por experiências diversas, entende-se que as loops devem cobrir perfeitamente o espectro de rádio desde Ondas Muito Longas (VLF) até Ondas Tropicais.

     

    Afim de não focarmos muito o segmento técnico, propomos aqui uma antena loop de alto ganho de ressonância, não só pela altura de seu quadro, mas pelo fato de ser giratótia por meio de um eixo simples e também ser montada como cruzeta vertical. Isso aumenta muito a sensibilidade de seus vértices e, baixa consideravelmento os níveis de ruído, uma vez que as tangentes de onda de rádio, normalmente horizontais, não se refletem em suas espiras. A montagem é auto-explicativa, não cabendo aqui demais detalhes, mas algumas considerações devem ser feitas:

     

    - Dê preferência a montar esta antena com quadro de madeira. Um experimentador montou o sistema com canos de PVC e curiosamente a instabilidade física do sistema apresentava sinais de ruído de fundo. O balanço do sistema produz pequenas variações de tensão, o que no receptor, torna-se ruído;

     

    - Coloque o capacitor variável do lado de fora do campo magnético, ou seja, do lado de fora da bobina. O fator "Q" das espiras em ressonância com o variável é muitíssimo mais estável e, eletricamente falando, a antena torna-se ressonante com muito mais precisão;

     

    - use um botão plástico para atuar no variável. A carga elétrica de nossos corpos torna o variável muito sensível, o que instabiliza a antena;

     

    - tenha certeza de que o eixo e o apoio da base giratória estão livres para girar. Se for preciso, coloque um pouco de óleo entre os apoios;

    Vamos então à montagem:

    Materiais:

    2 pedaços de sarrafo, cortados na medida de 61 cm de comprimento, por 4 de largura e 2cm de altura.

    1 capacitor variável de 1 ou 2 seções, cuja capacitância total seja superior a 420 pf. Experiências devem ser feitas com outros variáveis.

    PS: capacitores tipo miniatura, de origem americana foram testados, mas não apresentaram bons rendimentos.

    Madeira para a base e um segundo sarrafo, mais fino, como base giratória (vide ilustração abaixo)

    1 potenciômetro qualquer, que será quebrado, onde serão aproveitados apenas o eixo e base rosqueável.

    4 parafusos de tamanhos pequenos (2mm).

    37,80 metros de fio esmaltado, de cobre ou enrolamento de transformador, cuja seção esteja próxima ou superior a 1mm.

    A antena Loop em si consiste na montagem de uma cruzeta com os sarrafos. O diferencial desta proposta é que na base do quadro vertical, haverá uma segunda base, transpassada pelo eixo do potenciômetro, apoiada em uma base de madeira qualquer. Eletricamente, esta antena tem 17 espiras e meia, consumindo 37,80 metros de fio, em média. Cobertura integral da faixa entre 520 a 1710 Khz.

    A antena Loop em si consiste na montagem de uma cruzeta com os sarrafos. O diferencial desta proposta é que na base do quadro vertical, haverá uma segunda base, transpassada pelo eixo do potenciômetro, apoiada em uma base de madeira qualquer. Eletricamente, esta antena tem 17 espiras e meia, consumindo 37,80 metros de fio, em média. Cobertura integral da faixa entre 520 a 1710 Khz.

    Quadro:

    A antena Loop em si consiste na montagem de uma cruzeta com os sarrafos. O diferencial desta proposta é que na base do quadro vertical, haverá uma segunda base, transpassada pelo eixo do potenciômetro, apoiada em uma base de madeira qualquer. Eletricamente, esta antena tem 17 espiras e meia, consumindo 37,80 metros de fio, em média. Cobertura integral da faixa entre 520 a 1710 Khz.

         

    As cruzetas tem 61 cm de comprimento, por 4 cm de largura e 2 cm de altura, podem ser cortadas diretamente em uma madeireira ou casa de materiais de construção, mas se não for possível, as medidas de corte inferiores são: vinco de 2cm ao centro, que pode ser encontrado por meio de riscos transversais (ver ilustração). O afastamento dos cortes das adjacências é de 29,5 cm. A profundidade é de 2cm, conforme a altura (espessura vertical) da madeira.

    Base:

    A base da antena é composta por um pedaço de madeira com pelo menos 20x15 cm de área, mínimos para suportar o peso do conjunto. A altura (grossura) desta madeira deve ser tal, que seja possível furar a base para fixar o eixo do potenciômetro. Do mesmo modo que este eixo deve ser perfurado e parafusado nesta mesma base.

    Enrolamento:

    O enrolamento deve ser iniciado pela base giratória , onde já estará fixado o capacitor variável. Serão feitas, 17 espiras de fio muito bem esticado, onde ao se completar a 17ª volta, será feita mais meia espira, onde em qualquer dos pontos, este fio será levado à outra extremidade do variável. Para facilitar, o início do enrolamento pode ser fixo juntamente com a base do variável e seu fim, soldado posteriormente ao polo isolado.

    O projeto final ficou com 17 espiras e meia, mas existe um ponto muito importante para ser visto durante toda a montagem: a capacitância real do variável.

    Se houver espiras demais, a ressonância da antena não vai chegar muito mais que 1500 Khz, e se houver espiras de menos, a antena vai cobrir depois dos 800 Khz, em média e seguir até os 2100 Khz, o que pode ser um prejuízo só.

    Para evitar isso, faça como foi feito no protótipo: enrole umas 19 espiras (40 metros de fio) e vá desenrolando a cada 1/4 do quadro. Ligue e teste. Com o variável fechado, vc deve sintonizar o início da faixa e com ele todo aberto, o final. Para continuar ajustando, basta ir diminuindo o fio até que o valor seja encontrado.

    Na versão final, foi instalado um variável Douglas (Windsor,UK) com 2 seções interligadas, cuja capacitância deve estar próxima dos 680 pf, mais ou menos. Experiências devem ser feitas com vários variáveis e vários tamanhos de fio. Sempre entre as 17 e 19 espiras.

    Base giratória:

    A base giratória é uma adaptação de um sarrafo de no máximo 10mm de grossura por 35 de comprimento, que deve ser cortado na proporção de 2/3 de comprimento para a fixação do capacitor variável e do apoio ao receptor. A furação inferior pode ser conferida no gráfico. Neste ponto, não é crucial o afastamento de 2mm entre cada espira. Por ser a base, este fator não interefere tão fatalmente no bom funcionamento do sistema.

    Durante o enrolamento das espiras, o eixo do variável e os parafusos devem ser colocados em suas furações, para se evitar romper o fio na sua montagem posterior. No protótipo, o eixo do variável tem 6 centímetros de comprimento,e foi usado na furação, uma broca para madeira número 8. Os parafusos tem 2mm de espessura por 115mm de comprimento. Uma vista proporcional das ligações pode ser vista na ilustração:

    Vista parcial de uma proposta de localização do receptor após a montagem. O variável e suas ligações ficam de um lado e do outro, uma base é colocada para suportar o receptor

     

    Muitos dexistas já montaram este projeto e se consideram contentes com seus resultados.  Em São Paulo/SP, foi possível sintonizar perfeitamente emissoras do Norte e Nordeste brasileiros, como Radio Sociedade da Bahia, Radio Pioneira de Teresina/PI e muitas outras. Do exterior, foi feita com muita facilidade, a sintonia da Rádio Visão Cristiana de Turcos e Caicos, no Caribe, Radio Nacional da Espanha, Madrid. Uma emissora não muito rara, mas difícil de captar nos grandes centros foi a Rádio Noruega, transmitindo desde Kvitsoy, em 1.314Khz cuja sintonia foi feita às 23:40 hs de Brasília no bairro da Aclimação, região centro/sul da capital paulista. Emissoras argentinas, uruguaias e paraguaias tornaram-se corriqueiras durante a noite.

    O projeto desta antena é parte do Manual de Antenas e Periféricos, editado pelo C.B.R. Você também pode adquirir esta antena montada e calibrada diretamente com o autor. E-mails para maiores informações:  [email protected] 

    TABELA DE CABOS COAXIAIS

    ReferênciaOhmsVelocidadepF/m30 MHz perdas dB100 MHz perdas  dB400 MHz perdas dBDiâmetroDielétrico
    RG-5/U  52,50.6693,56,208,819,48,4PE
    RG-5B/U 50,00.6696,86,207.919,48,4PE
    RG-6A/U 75,0 67,06,208,919,48,4PE
    RG-7/U95,0 41,0 7,817,0  
    RG-8/U  50,0     5,0 6,313,810,3 
    RG-8/U52,00.6697,04,706,313,410,3PE
    RG-8/U50,00.8083,3   10,3PEF
    RG-8A/U50,00.66100,04,706,213,410,3PE
    RG-8A/U52,00.6697,0 5,813,5  
    RG-8mini80,00.6780,00,983,37,56,1PEF
    RG-8 XX50,00.80 7,04  6,2PEF
    RG-9/U 51,00.6698,44,906,516,410,8PE
    RG-9A/U 51,00.6698,44,906,516,410,8PE
    RG-9B/U 50,0 0.66100,04,907,616,410,8PE
    RG-10A/U50,00.66100,04,306,213,412,1PE
    RG-11/U 75,00.6667,25,307,515,810,3PE
    RG-11/U75,00.8055,4   10,3PEF
    RG-11A/U75,00.6667,54,007,515,710,3PE
    RG-11A/U75,00.6668,04,007,515,710,3PE
    RG-12/U   75,00.6667,55,207,515,712,0PE
    RG-12A/U 75,00.6667,55,207,515,712,0PE
    RG-13/U    74,00.6667,55,307,615,8  
    RG-13A/U 75,00.6667,55,207,515,710,8PE
    RG-14A/U 50,00.66100,03,304,610,213,8PE
    RG-16/U    52,00.6796,8 4,0 16,0 
    RG-17/U    52,00.6696,72,033,17,922,1PE
    RG-17A/U 52,00.6698,42,033,17,922,1PE
    RG-18/U    52,00.6698,42,033,17,922,1PE
    RG-18A/U 50,00.66100,02,033,17,924,0PE
    RG-19/U    52,00.66100,01,592,36,1 PE
    RG-19A/U   50,00.66100,01,502,36,128,4PE
    RG-20/U    52,00.66100,01,502,36,130,4PE
    RG-20A/U    50,00.66100,01,502,36,130,4PE
    RG-21A/U 50,00.66100,030,5042,785,38,4PE
    RG-29/U    53,50.6693,5 14,431,54,7PE
    RG-34A/U 75,00.6667,22,794,610,916,0PE
    RG-34B/U 75,00.6667,02,794,610,916,0PE
    RG-35A/U 75,00.6667,31,902,86,424,0PE
    RG-35B/U 75,00.6667,01,902,86,424,0PE
    RG-54A/U 58,00.6687,0 10,522,36,4PE
    RG-55/U   53,50.6693,510,5015,832,85,3PE
    RG-55A/U 50,00.6697,010,5015,832,85,5PE
    RG-55B/U    53,50.6694,010,5015,832,85,5PE
    RG-58/U   50,00.6695,0 16,139,55,0PE
    RG-58/U     53,50.6693,3 15,334,55,0PE
    RG-58/U    75,00.7955,5 15,134,56,2PEF
    RG-58A/U 53,50.6693,510,9016,039,45,0PE
    RG-58B/U 53,50.6693,5 15,134,45,0PE
    RG-58C/U 50,00.66100,010,9016,139,45,0PE
    RG-58XX   50,00.80 6,60  6,2 
    RG-59/U    73,00.6668,67,9011,223,06,2PE
    RG-59/U    75,00.79 55,5   6,2PEF
    RG-59A/U   75,00.6667,37,9011,223,06,2PE
    RG-59B/U 75,00.6667,07,9011,223,06,2PE
    RG-62/U    93,00.8444,35,708,917,46,2PEA
    RG-62/U    95,00.7944,0   6,2PEF
    RG-62A/U 93,00.8444,35,708,917,46,2PEA
    RG-62B/U 93,00.8646,0 9,520,36,2PEA
    RG-63B/U 125,00.7636,0 4,911,210,3PE
    RG-67B/U 93,00.70     PE
    RG-71B/U 93,00.6646,05,708,917,46,2PEA
    RG-74A/U 50,00.66100,03,304,610,215,7PE
    RG-79B/U 125,00.7436,0  16,011,5PE
    RG-83/U    35,00.66144,4 9,2 10,3PE
    RG-84A/U 75,0       
    RG-112 /U50,00.66100,0  45,04,1PE
    RG-114A/185,00.6622,0  42,010,3PE
    RG-122/U 50,00.66100,014,8023,054,2  
    RG-133A/U95,00.6653,0   10,3PE
    RG-141/U   50,00.7096,5 10,822,64,9T
    RG-141A/U50,00.6996,5 10,822,64,9T
    RG-142/U   50,00.7096,5 12,826,35,3T
    RG-142A/U50,00.7095,09,0012,826,35,0T
    RG-142B/U50,00.7096,5 12,826,35,0T
    RG-164/U   75,00.6667,02,002,86,422,1PE
    RG-174/U   50,00.66101,017,0029,257,42,6PE
    RG-174A/U50,00.66100,021,7029,257,42,5PE
    RG-177/U   50,00.66100,02,033,17,922,7PE
    RG-179B/U  75,00.70    2,5T
    RG-180B/U  95,00.70    3,7T
    RG-187A/U  75,00.70   52,52,8T
    RG-188A/U  50,00.7095,017,0037,454,82,8T
    RG-195A/U  95,00.70    3,9T
    RG-196A/U  50,00.7095,027,0043,095,02,0T
    RG-212/U   50,00.66 100,06,208,919,48,4PE
    RG-213/U   50,00.6697,03,206,313,510,3PE
    RG-213/U   50,00.6697,03,206,013,010,3PE
    RG-213/U   50,00.66101,03,207,013,510,3PE
    RG-213/U   52,00.66101,04,306,213,510,3PE
    RG-213foam 50,00.77273,01,95 11,610,3PEF
    RG-213     50,00.66101,02,45  10,3PE
    RG-214/U 50,00.66100,04,907,616,410,8PE
    RG-214 US50,00.66101,03,205,713,02,1PE
    RG-215/U 50,00.66101,04,306,213,52,1PE
    RG-216/U 75,00.6667,05,307,615,810,8PE
    RG-217/U 50,00.66100,03,904,610,213,8PE
    RG-218/U 50,00.66100,02,033,17,922,1PE
    RG-219/U 50,00.66100,02,033,17,9 PE
    RG-220/U 50,00.6696,81,502,36,128,5PE
    RG-221/U 50,00.66100,01,502,36,130,0PE
    RG-222/U 50,00.66100,030,5042.785,35,5PE
    RG-223/U 50,00.66101,010,5015,832,85,3PE
    RG-224/U 50,00.66100,03,304,610,215,6PE
    RG-225/U 50,0       
    RG-302/U 75,00.7069,0   5,2T
    RG-303/U 50,0       
    RG-316/U 50,00.7095,017,0028,0 2,6T
    RG-331/U  50,00.78      
    RG-332/U  50,00.78      
    RG-7612    25,00.696      
    Aircom +     50,00.8484,01,803,37,410,3PEA
    Aircell-7    50,00.8374,03,706,9 7,3PEA
    Bamboo 3  75,00.89  1,9 17,5PEA
    Bamboo 6  75,00.88  3,7 10,5PEA
    CAF1,1/5,3 75,00.8254,02,905,3 7,4PEF
    CAF1,6/7,3 75,00.8254,02,103,9 9,8PEF
    CAF1,9/8,8 75,00.8254,01,703,2 11,3PEF
    CAF2,5/11,475,00.8254,01,402,6 13,9PEF
    CAF3,7/17,375,00.8254,00,911,7 20,3PEF
    CF1/2"       50,00.82 82,01,282,4 16,0PEF
    CF1/2"       60,00.8268,05,803,1 16,0PEF
    CF1/2"       75,00.8254,04,902,6 16,0PEF
    CF1/4"       50,00.8282,02,404,5 10,0PEF
    CF1/4"          60,00.8268,02,304,3 10,0PEF
    CF1/4"       75,00.8254,02,304,3 10,0PEF
    CF3/8"       50,00.8282,01.93.5 12.1PEF
    CF5/8"       75,00.8254,01,001,9 19,6PEF
    CF7/8"       50,00.8281,00,711,4 28,0PEF
    CF7/8"        60,00.8268,00,691,3 28,0PEF
    CF7/8"       75,00.8254,00,691,3 28,0PEF
    CT 50/20foam50,00.80 2,33  10,3 
    CX2/6        50,00.6397,02,805,3  PE
    CX4/12       50,00.6397,01,522,9  PE
    HCF1/2       50,00.7585,02,003,7 13,5PEF
    Heliax 1/250,00.8875,01,24  16,7 
    HFE1,5/6,560,00.6684,03,506,6 8,8PE
    H100         50,00.8480,02,10 8,49,8PEA
    H155         50,00.79100,03,409,4 5,4PEF
    H500         50,00.8182,04,108,79,87,0PEF
    H1000       50,00.83    10,3 
    H2000       50,00.8081,62,20  10,3PEF
    LCF1/2"    50,00.8776,01,232.3 16,0PEF
    LCF7/8     50,00.8776,00,661,3 28,0PEF
    LDF4/50A50,00.8877,1  5,016,0 
    3/8"        50,00.79  3,98,110,3 
    TU-165   50,00.7095,0  41,02,2T
    TU-300   50,00.7095,0  25,03,6T
    TU-545   50,00.7095,0  14,06,4T


     Perda aproximada em decibéis por metro de cabo coaxial (a qualidade do cabo pode modificar os valores)

    Tipo

      Perda 
    (dB/m)

     Diâmetro  externo
    (mm)

     Impedância 
    (Ohms)

    RG8

    0.39

    10.29

    50

    RG8X

    0.6(?)

    6.15

    50

    RG58C

    0.90

    4.95

    50

    RG59

    0.51

    6.15

    75

    RG142/RG400

    0.59

     4.95

    50

    RG174

    1.39

    2.8

    50

    RG188

    1.26

     2.74

    50

    RG316

    1.28

    2.49

    50

    Belden 9913 
    (RG8/U)

    0.20

     10.29

    50

     

    ANTENA G5RV

    A G5RV é hoje uma antena muito popular nas bandas de HF. Apesar do uso difundido nessas faixas, há alguns mitos e conceitos errôneos relativos a ela. Isso parece fazer parte da sua própria existência. À luz de texto do " Antenna Compendium ", Volume 1, gostaria de esclarecer alguns tópicos sobre essa versátil antena, derrubando, inclusive, alguns mitos erroneamente criados.

    Iniciando vejamos o que disse Louis, G5RV (autor do projeto) de West Sussex, Inglaterra, falecido com 90 anos de idade: "A antena G5RV, com seu arranjo de alimentação especial, é uma antena multibanda alimentada na parte central, podendo operar eficientemente em HF, de 3.5 a 28 MHz. Suas dimensões são especificamente projetadas para operar em áreas de espaço limitado (V invertido),mas que pode "esticar" para razoáveis 31 metros, quando operada totalmente esticada." Adicionalmente, Louis afirma que, "Ao contrario das antenas multibandas em geral, a G5RV desenhada em versão comprimento total não foi projetada como um dipolo meio-onda na frequência mais baixa de operação, mas sim como uma long-wire com 3/2 de onda alimentada no centro em 14 MHz, onde os 10,36 m de linha aberta funcionam como um transformador de impedâncias 1:1. Isto faz com que a alimentação, com linhas abertas de 75 ohms ou cabos coaxiais de 50/75 Ohms nos levem à uma alimentação perfeita nessa banda, com uma consequente SWR baixíssima."

    Porém, em todas as outras bandas de HF, essa seção casadora serve como uma maquiagem, acomodando parte da estacionária (componentes de corrente e tensão), que em certas frequências operacionais, não pode ser completamente acomodada na versão totalmente esticada ou mesmo em V-invertido. A frequência central do projeto da versão em tamanho completo é 14,15 Mhz. e a dimensão de 31,27 m é derivada da fórmula para antenas long-wire, que é:

    COMPRIMENTO = 149,95(n -0 ,05)/f(MHz)

                             = (149,95 x 2,95)/14,15

                                   = 31,27 m

    onde n = o número de meio comprimentos de onda do fio (versão esticada)

    Considerando que o sistema inteiro será levado à ressonância pelo uso de um acoplador de antenas, na prática, a antena é cortada com 31 metros. Como a antena não faz uso de "traps" ou ferrites, a parte dipolo da mesma se torna progressivamente mais longa (eletricamente) com o aumento da freqüência. Esse efeito confere certas vantagens sobre o uso de "traps" ou ferrites, pois com o acréscimo de comprimento elétrico, os lóbulos maiores da componente vertical do diagrama polar tendem a diminuir, à medida que a freqüência sobe. Assim, de 14 Mhz para cima, boa parte da energia irradiada no plano vertical é feita em ângulos interessantes para DX.

    Em adição, as mudanças de diagrama polares com o aumento de freqüência tendem a um padrão de dipolo de meio-onda típico em 3.5 MHz,   um dois meia-onda em fase em 7 e 10 MHz e  para o de um padrão de long-wire em 14, 18, 21, 24 e 28 MHz. Embora o casamento de impedância com linha aberta de 75 ohms ou coaxial de 75 ohms na entrada da seção casadora seja bom em 14 MHz, podendo ainda resultar numa SWR de 1:1,8, com cabo coaxial de 50 Ohms, nessa banda, o uso de um acoplador de impedâncias é necessário em todas as outras bandas, porque a antena mais a seção casadora apresentarão uma carga reativa ao alimentador, nessas outras faixas. Assim, o uso do tipo correto de casador de impedâncias é essencial, de forma que assegure a transferência do máximo de potência à antena, a partir de um típico transceptor que tenha impedância de 50 ohms de saída (desbalanceado). Considerando que os modernos transceptores utilizam proteção contra altas SWR, iniciando sua atuação a partir de relações de 2:1, o acoplador irá ajudar, também, para que o mesmo libere toda sua potência. Boa parte desses transceptores já possuem, internamente, esses acopladores automáticos, que se prestam perfeitamente para essa finalidade.

    TEORIA DE OPERAÇÃO

    Aqui segue a teoria geral de operação. Lembre-se de que essas informações fazem parte da teoria e que a operação propriamente dita dependerá da montagem, altura sobre o solo, apoios de metal, linhas de energia, arvores, etc.

    3.5 MHz

    Nesta faixa, a antena age como uma meio-onda encurtada tipo dipolo, com aproximadamente 5,18 m. de comprimento total. O remanescente da seção de casamento de impedância introduz uma reatância inevitável para a antena, entre o ponto de alimentação e a linha de alimentação. O diagrama da antena está efetivamente igual a um dipolo de meio-onda nesta banda.

    7 Mhz

    O comprimento total, mais os 4,87 m. da seção adaptadora transformam a G5RV em uma colinear em fase, com 2 meia onda, parcialmente dobradas para cima. O diagrama de irradiação da antena é um pouco mais agudo que um dipolo por causa de suas características de colinear. O acoplamento é um pouco degradado devido à inevitável reatância, introduzida pelo comprimento extra na seção adaptadora. Essa reatância pode ser facilmente eliminada com um acoplador de antenas.

    10 MHz

    Nesta faixa, a antena funciona como uma colinear 2 meia-onda. É muito efetiva, mas a reatância apresentada ao ponto de alimentação requer um bom antena tuner (ATU).  O diagrama de irradiação é basicamente idêntico ao padrão de 7 MHz.

    14 MHZ

    Esta faixa é onde a G5RV realmente brilha. A antena está operando como uma antena 3/2 comprimento de onda, alimentada pelo centro com um diagrama de irradiação com muitos lóbulos, angulo de irradiação baixo, em torno dos 14 graus de elevação, que é muito eficiente para DX, na mais popular das bandas de DX. A antena apresenta uma resistência de carga de 90 ohms, basicamente não apresentando reatância. A alimentação com cabo coaxial de 50 ohms irá apresentar uma SWR de 1,8:1, facilmente acoplada por um sintonizador de antenas.

    18 MHz

    A antena trabalha como 2 ondas completas em fase, combinando um angulo mais baixo de irradiação com a grande largura de banda de uma colinear. A carga é de alta impedância, com razoavelmente baixa reatância.

    21 MHz

    Nesta faixa, a antena trabalha como uma long-wire com 5/2 comprimento de onda, alimentada pelo centro. Isto leva à muitos lóbulos, baixo ângulo de radiação, com alta impedância resistiva de carga. Quando devidamente sintonizada com o ATU, transforma-se em uma antena altamente efetiva para Dx's.

    24 MHz

    A antena funciona, novamente, como uma long-wire com 5/2 ondas, mas devido à inversão no sentido da corrente, a carga é resistiva, aproximadamente igual a carga em 14 MHz. Novamente, o diagrama de irradiação é composto de muitos lóbulos, com baixo angulo de irradiação

    28 MHz

    Nesta banda, a antena trabalha como uma long-wire, 3 comprimentos de onda, centro-alimentada. O diagrama de irradiação é semelhante a 21 ou 24 MHZ, mas com certa vantagem, devido ao efeito de colinear obtido pela alimentação de duas antenas 3/2 de onda em fase. A carga é de alta impedância, com baixa reatância. Na parte 3, será discutida a construção da G5RV...

    DETALHES de CONSTRUÇÃO - ANTENA TOTALMENTE ESTENDIDA

    São especificadas as dimensões da G5RV totalmente estendidas na parte 1. A antena não precisa ser, necessariamente, totalmente estendida, mas pode ser instalada como um V-invertido. O centro da antena deverá ser tão alto quanto possível, obviamente, e a seção adaptadora deverá descer em ângulo reto para com a antena. É recomendável que a menor seção usada para o fio de cobre da antena seja de 2,5 mm², embora existam antenas construídas com fio de cobre # 1,5 mm² que estão operando muito bem. Se a antena for montada como V-invertido, o angulo de ápice (incluso) não deve ser menor do que 120 graus .

    A SEÇÃO ADAPTADORA

    É recomendado que a seção adaptadora seja construída de alimentador de linha aberta,  para mínima perda, pois a mesma sempre estará em presença de SWR. Face a presença constante de ondas estacionárias, a impedância da mesma não é importante. Uma técnica de construção satisfatória para a seção casadora de linha aberta seria fabricar seus próprios separadores de acrílico, plástico ou semelhante, com dielétrico de baixa perda. As tiras de plástico seriam cortadas com aproximadamente 5 centímetros de comprimento e 12 mm. de largura, com entalhes para encaixar os fios de # 2,5 mm². Perfure as extremidades dos separadores, aproximadamente  1 cm. de cada extremidade, para então poder amarrar os fios em sua posição. Os espaçadores dever ser montados à cada 30 centímetros.

    Outra forma de se fazer a seção adaptadora seria utilizando-se fitas de alimentação de antena de TV, de grau industrial (Não fabricadas no Brasil...) de 300 ou 450 ohms, cuja seção dos fios seja, no mínimo, AWG16 a AWG20.   Abra janelas na parte plástica , evitando que as fitas se torçam, por ocasião de fortes ventos. Por último, e a menos desejável, (embora funcione), é a fita de televisão comercial.  A desvantagem principal desse tipo é a durabilidade. Os condutores dessa fita normalmente são #22 a #28, e a qualidade do plástico usado para a isolação é muito baixa, deteriorando mais rapidamente ao sol e a chuva. A vantagem maior é que está prontamente disponível em lojas de eletrônica, supermercados e loja de ferragens.  A qualidade é proporcional ao preço, se vários tipos estão disponíveis. Não use o tipo "pesado" (2 isolamentos),   pois a proteção adicional descasará a seção adaptadora, especialmente em 3.5 ou 7 MHz.

    COMPRIMENTO DA SEÇÃO ADAPTADORA

    O comprimento da seção adaptadora é de meio-onda ELÉTRICA em 14 MHz. O comprimento físico  para utilização é determinado pela seguinte fórmula :    L = (149,95 x FV)/f(MHz)

    onde FV é o fator de velocidade da seção adaptadora. O resultado é obtido em metros.

    O fator de velocidade é determinado pelo tipo da linha e as propriedades dielétricas do seu isolamento. Para os três tipos de linha discutidos acima, o FV (fator de velocidade) é:

    LINHA ABERTA

                    0,97

    LINHA TIPO TV INDUSTRIAL

                    0,90

    FITA PARALETA DE TV

                    0,82

    Substituindo o FV na fórmula e calculando para um centro de frequência de 14.15 MHz, você obtém os seguintes comprimentos para o adaptador de impedâncias

    LINHA ABERTA

                10,28 m

    LINHA TIPO TV INDUSTRIAL

                  9,53 m

    FITA PARALELA DE TV

                  8,69 m

    O adaptador de impedâncias é conectado ao centro da antena,  devendo descer verticalmente pelo menos 6 metros ou mais, se possível. A partir dai, ele pode ser amarrado ou dobrado, conectando-se ao mesmo o cabo coaxial, levando-se até o acoplador de antenas ou direto ao equipamento, se o mesmo possuir acoplador interno.

    A LINHA DE ALIMENTAÇÃO

    No artigo original que descreveu a antena G5RV , publicado no "RSGB BULLETIN", de novembro de 1966, foi sugerido que, se um cabo coaxial fosse usado para alimentar a antena, um balun poderia ser empregado para fazer o necessário balanceamento, logo na base da seção adaptadora. Porém, experiências mais recentes e um melhor entendimento da teoria de operação dos baluns indicaram que tal dispositivo era inadequado devido à alta reatância de carga, apresentada na base da seção adaptadora. Consequentemente, NÃO USE UM BALUN NAS G5RV

    Se um balun é conectado à uma linha com SWR igual ou superior a 2:1, suas perdas internas aumentarão. O resultado disso é o aquecimento do toroide de ferrite, com conseqüente saturação. Operando saturado, o toroide pode distorcer as ondas de RF, gerando harmônicos, e, em casos extremos, com altas potências, destruir literalmente o toroide. Um sintonizador de antenas pode, tranqüilamente, acomodar a carga variável, cancelando a reatância presente, reduzindo ainda a energia dos harmônicos presentes, que, pela natureza multibanda da G5RV, poderiam ser irradiados. De uma forma geral, os acopladores existentes nos modernos equipamentos acoplarão facilmente todas as bandas da G5RV, com exceção de 10 Mhz.

    SISTEMA DE ALIMENTAÇÃO ALTERNATIVO

    Doug DeMaw, W1FB, no W1FB'S ANTENNA BOOK", de sua autoria, coloca que a G5RV pode ser alimentada com linha aberta, direto para o ATU. Se isto for feito, a antena carregará em todas as faixas sem problemas.  Neste caso, o ATU deve ter uma saida para linha aberta, de forma tal que faça o casamento em todas as bandas. Isto iria auxiliar em operações portáteis, onde o operador poderia usar uma linha aberta e um pequeno sintonizador projetado para esse tipo de linhas, carregando em todas as bandas de HF. É uma solução inteligente, que viria diminuir muito o peso dos equipamentos a serem transportado em operações portáteis. Um comprimento interessante de linha aberta seria de 21,9 metros, permitindo que a antena toda e a linha aberta fossem enrolados em um pequeno balde ou carretel de fios vazio , facilitando o transporte.

    Finalizando, se você precisa de uma boa e discreta antena multibanda  para sua estação, dê uma chance para a G5RV !

    FONTES BIBLIOGRÁFICAS: ARRL "ANTENNA COMPENDIUM", VOLUME 1 / ARRL "W1FB'S ANTENNA NOTEBOOK" / " W1FB'S ANTENNA NOTEBOOK " / ARRL "W1FB'S NOVICE ANTENNA NOTEBOOK" / TAB PUBLICATIONS "73 WIRE AND DIPOLE ANTENNA" / EDITORS AND ENGINEERS "RADIO HANDBOOK"

    Usando a  G5RV  160-10 metros como V-Invertido

    A G5RV 160-10 metros, que é uma G5RV dupla, (G5RV)x2,   pode ser usada com melhor desempenho na parte final do espectro de HF, configurando-a como um V-Invertido. Eletricamente, a (G5RV)x2 é um dipolo com 3/2 de onda para a banda de 40 metros, ou 0,75 de onda por lado. Nessa configuração, ela mostrará qualidades bidirecionais mais acentuadas, com lóbulos direcionais mais pronunciados. Para utilizar um V-Invertido como uma antena multibanda em HF, o usuário deverá projeta-la para o meio do intervalo desejado. Exemplificando, se você deseja usa-la de 20 a 10 metros, então o ângulo de ápice é calculado para a banda de 15 metros. Usando esta lógica, o comprimento de cada lado é de 2,25 comprimentos de onda, que requerem um ângulo ao redor 70 graus.

    Usando um ângulo de 70 graus, resultará em uma antena suportada pela parte superior  com dois suportes laterais, formando um triângulo equilátero (NÃO RETÂNGULO) com "pernas" de 3 apoios, com lados de 31,1 metros e base de 50,9 metros . É um triângulo grande, com altura (ápice) de 17,83 metros. A diretividade está ao longo do plano formado pelos lados e a altura, sendo bi-direcional. O ganho aproximado, é mostrado na tabela abaixo, onde estão tabulados os ganhos para as bandas superiores de HF.

    FREQÜÊNCIA (Mhz)

    COMPRIMENTO

    (comprimento onda)

    GANHO  dBd

    7,0

    0,75

    1,5

    10,1

    1,1

    2,5

    14,0

    1,5

    4,5

    18,1

    1,8

    5,3

    21,0

    2,25

    6,0

    24,9

    2,6

    6,5

    28,0

    3,0

    7,0

    Essa tabela de ganhos é otimista, baseado-se que o angulo de ápice esteja correto para determinado comprimento de lado, o que não ocorre na prática. O ganho será mais aproximado na banda de 15 metros, sendo na banda de 40 metros o menos aproximado, porem no máximo 1 dBd de diferença. Os valores dessa tabela aproximam-se muito do ganho de uma pequena antena direcional e o angulo de abertura poderia cobrir, com toda certeza, o Brasil, de Norte a Sul. (caso seja montada na direção leste-oeste).

    ALGUNS EXEMPLOS DE G5RV

    A antena multibanda G5RV é um projeto muito popular nas bandas de HF. A mais popular delas é configurada como um dipolo 3/2 de onda em 20 metros, e trabalha tanto como um dipolo encurtado ou uma long-wire alimentada como colinear, nas outras bandas. Nesta configuração, o comprimento total é de 31,1 metros, com uma seção adaptadora variando de 8,53 m a 10,36 m. Em alguns casos, ela pode ser muito longa para se adaptar à seu terreno e não são todos que podem convencer seus vizinhos a aceitar uma de suas "pernas" em sua propriedade. Nestes casos, uma versão equivalente à metade da anterior, cobrindo 7 a 28 MHz pode ser utilizada. A recíproca é verdadeira: alguns amadores gostariam de operar em 1.8 MHz, morando em terrenos que acomodem os 62,18 metros necessários para tal versão da G5RV.  Aqui seguem algumas dimensões já calculadas, que podem ser úteis:

    BANDA    (MHZ)

        1.8 - 28

         3.5 - 28

       7.0 – 28

    VERSÃO NORMAL

       62,18 m

       31,1 m

      15,54 m

    ALIMENTAÇÃO:

     

     

     

    LINHA ABERTA

      20,56 m

      10,28 m

    5,14 m

    FITA TV INDUSTRIAL*

      19,06 m

        9,53 m

    4,76 m

    FITA TV NORMAL

      17,38 m

        8,69 m

    4,34 m

    OBS.: O segundo tipo não é encontrado no Brasil. Se adotado o terceiro tipo (fita TV 300 ohms) procurar por material de boa qualidade. Preferencialmente adotar a primeira opção, que embora um pouco mais trabalhosa, apresenta resultados ótimos, principalmente quando se trabalha com potências mais altas (acima de 200 watts).

    As antenas acima mencionadas trabalharão em 6 metros, muitas vezes sem auxilio do sintonizador de antenas!

    Das antenas listadas acima, existe uma observação feita por Louis, G5RV, em seu artigo no "ARRL ANTENNA COMPENDIUM", Volume 1, sobre a versão 7-28 Mhz: Ele se refere à cidade de Evhan, residência de WB2ELB, que alimenta a mesma com uma linha única, diretamente do acoplador interno do seu Kenwood e de outros radioamadores locais, que se utilizam da versão 3.5 - 28 Mhz, nas mesmas condições.

    Você pode construir a linha de alimentação tipo linha aberta de muitas maneiras. Sugiro, pessoalmente, que você use o celeron como isolante, pois além de seu excelente dielétrico, possui rigidez mecânica muito boa e grande durabilidade, mesmo exposto às intempéries. Venho usando o mesmo, em algumas antenas, há anos, sem nenhum tipo de problemas.

    (A reprodução dos textos acima está autorizada desde que a autoria seja preservada e mencionada - Direitos Reservados:  Marcus Martins - PY4SM / PY2DD)

       Construa um Filtro de Antena e evite interferências em Televisores (TVI)

    Esquema para a construção de um simples porém efetivo filtro que ajuda de forma eficaz a suprimir as interferências de armônicos de  RF em receptores de televisão.
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    30 Meter Loop by N9MW- This antenna is an easy one day construction project.

    300 ohm twinlead 40 meter dipole- The N2CKH travel special 300 Ohm ladder line convertable antenna

    30m Delta Loop Antenna- 30 meters band 5 Element Bi-Directional Delta Loop Beam Antenna with eznec antenna dimensions file.

    4 el yagi for 50 Mhz updated- The EF0604S a 4 elements yagi antenna plan for six meters band by YU7EF

    4 Element 6 Meter Quad- Durable Easy To Build 4 Element 6 Meter Quad Or 6N2 Or 4 Element 6

    4 Element Cubical Quad for 10 meter- An article by 2E0DBD on homebrewing a 4 element cubical quad antenna for 28 mhz

    4 element yagi for 20 meters- Pictures and plans of a 4 elements yagi beam antenna for 14 Mhz

    4 element Yagi For 50 Mhz- A 4 elements Yagi Antenna for six meter band

    4 element yagi for 6 meters- Project plan for a 4 element yagi beam for 50 Mhz in spanish

    4 Element Yagi Project for 144MHz updated- A homebrew project for a 2 meter 4 element yagi beam antenna by 2E0HTS

    4 elements 50MHz Quagi- Total Boom Lenght is 3 m.

    4 elements yagi for 70 MHz- A portable 4 elements yagi antenna for 70 MHz by yu7ef

    4 meter antenna conversion updated- A Siverrot antenna converter for 70 MHz operations

    4 SQ antennas with 90 degree couplers- 80 meters 4 Square antennas at 5A7A

    4 Square antenna for 80 meters- Four phased vertical antennas on 80 meter band

    4 Square Vertical Phased Array- Improve your 80 and 160 meter signal without a Yagi!

    40 80 Meter GP Vertical- A vertical antenna for 40 and 80 meters band with no need of antenna tuner

    40 m Band Delta loop Antenna- 40 meters band Delta loop vertically polarised antenna by YO4DFT

    40 m Lazy H array Antenna- Lazy H Array for 40 meters band by NA4L

    40 m linear loaded dipole antenna- The K4VX linear-loaded dipole for 7 MHz, simple and practical

    40 m NVIS Square Loop antenna- A NVIS square loop antenna with a parasitic reflector for 40 meter band by NA4L

    40 M. triangular full wave vertical loop

    40 meter 4-square antenna- A permanent working 40 meter system based on a 4-square antenna

    40 Meter Bowtie Antenna- antenna is a type of antenna that reputedly provides higher gain at lower radiation angles

    40 Meter coaxial antenna- An antenna for 40 meter band made entirely of coaxial cable either RG58 or RG59 Au.

    40 meter delta loop - M0MCX- Pictures and details of a wire delta loop antenna for 40 meters band

    40 Meter delta loop- A delta loop wire antenna for 7 Mhz quick to setup by KC4HW

    40 Meter Delta Loop By PY4VE Via K4TX

    40 Meter Delta Loop- Vertical height of the loop antenna itself is 34 feet 3 inches resulting with the bottom 60 feet

    40 meter double bazooka antenna- A double bazooka antenna plan for the cw portion of the 40 meter band by k0ru

    40 Meter Full Wave Loop new- A 7MHz Full wave loop antenna in diamond shape for field day operations

    40 Meter Moxon- A Moxon antenna for 40 meters band project by W7XA

    40 meter Moxon by SM0DTK- A wire moxon antenna plan for the 7 Mhz

    40 Meter NVIS antenna- Near Vertical Incidence Skywave (NVIS) and the 40 meter Novice Sub-band.

    40 Meter Parasitic Delta Loop pop- 40 Meter 2 element full size parasitic delta loop wire beam construction and switchable

    40 meter phased delta loops- N6AQ delta loops antennas for 40 meter band

    40 Meter Rotatable Dipole- An excellent all-around 40 meter antenna for those who don’t have room for a yagi by K6IF / W6BDN

    40 meter shortened dipole - M0MCX- Interesting little project with a couple of loading coils by M0MCX

    40 thru 10 Meter Zepp Antenna- A modified 20 meter double zepp wire Operating Bands: 40 thru 10 meters (with tuner)

    40/20 Trap Dipole- An easy to make trap dipole antenna for 40 and 20 meters

    40/30 MOXON- A moxon antenna project for 40 and 30 meters by IK2CLB

    40/80 Coil loaded dipole- A coil loaded dipole antenna for 40 and 80 meters band by I2CN

    40/80 Trap Dipole Design- An home made trapped dipole antenna for 40 and 60 meters band by 2E0HTS

    40-80 Dipole antenna- A 40 80 dipole antenna design by WA6ESC PDF File

    40m & 80m portable wire antenna- G8ODE antenna project, where the 40m & Short 80m antenna

    40M 3 element beam- History project and dimensions of a 3 element yagi beam for 40 meters band

    40M Beam -- From QRZ 

    40m broadband vertical antenna- A loopy loop loaded vertical antenna operating range 7.0 to 7.3 MHz by S. C. Chuck Smith, WA7RAI

    40m delta loop- Building a 40m (7MHz) horizontal delta loop

    40m Short Antenna- GM4JMU shortened dipole for 40 meters band

    40M Shortened Loop -- By Ben Smith, W4KSY Via Antennex

    40M Triangular Full-Wave Vertical Loop Antenna -- From W5DXP

    40m Vertical Antenna for $10 -- From KG6IIR

    40m/80m Portable antenna pop- Portable antenna for 40 and 80 meter

    40m/80m Portable antenna- Portable antenna for 40 and 80 meter

    40M/80M Trap Dipole -- From QRZ

    43 element Yagi for 2 mt.- 43 Element Yagi for 144.200 MHz by VE7BQH

    43 Foot Multiband Vertical Installation and Performance

    430 MHz portable yagi- UHF 3 element portable antenna with gamma match by ON6MU

    432 8 Element Quagi Antenna By N2KBK

    432 Mhz 8 Element Quagi Antenna- How to build a 432 Mhz Quagi, using a wood-made boom, and gives a 13 DBI Gain

    432 MHz Antenna Comparison Chart- Comparison of several UHF antennas by DF9CY

    432MHz Moxon Antenna- Contesting for beginners with a bent coat hanger! A moxon antenna project for 70cm band.

    440 MHz -- 2 Element & 4 Element Yagi's - From The Antenna Elmer

    440 Mhz J-Pole Antenna plans- Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build.

    4el. Hentenna for 50MHz- A 4 elements Hentenna for six meter band

    4m Slim Jim Antenna- This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due...

    4N1SM 5 elements yagi for 15 Meters- EF155A1 21 MHz monobander antenna by YU7EF

    4X44 elements 2300 Mhz Loop Antenna- F6BON antenna 4x44 loop array in french

    4Z5NY Antenn calculators- The formulas for a dipole and vertical, j-pole, double square, Yagi and EH antenna calculators

    5 Band Log Periodic Dipole Array -- From VE7CA

    5 bands HF portable antenna- A vertical portable antenna system by W0SJS that will work on 40, 30, 20, 17 and 15 meters

    5 element Yagi for 6 meters band- 5 Elements 12,5 Ohm Yagi with a 6m Boom

    5 element 2-meter Yagi -- From The ARRL

    5 Element for 50 MHz simulation- Simulation of the Konni Antennen 5 Element for 50 MHz

    5 element LFA Yagi for 50MHz- A compact 5el Yagi with good performance and completely flat SWR.

    5 Element yagi for 10 meters updated- A directional 5 element yagi antenna for 28.5 Mhz in spanish

    5 element yagi for 20 Meter band- Picture and construction details of a 5 element 20 meter monobander

    5 Elements 28 MHz Monobander- A 5 elements yagi antenna for 10 meters band project, plane and picture of the EF105A by YU7EF

    5 elements DK7ZB Yagi for 70MHz- A 5 elements homemade DK7ZB yagi antenna for 4 meters band based on a 50MHz TONNA

    5 elements DK7ZB Yagi for 70MHz- A 5 elements homemade DK7ZB yagi antenna for 4 meters band based on a 50MHz TONNA

    5/8 Collinear antenna- A 5/8 wave stacked j-pole antenna plan

    5/8 Six Meter Vertical -- by G3JVL

    5/8 Wave Vertical Antenna Calculator- Design your own 5/8 wave vertical antenna. A simple jscript calculator at Antenna Elmer.

    5/8-WAVE COLINEAR "OUTSIDE PVC" 2-METER 146 MHz FM J-POLE Via KB1DIG & KB1GTR

    50 Mhz 5 element EMT Conduite Beam- VA3EXT 5 element beam antenna for 6 meters band

    50 Mhz 6 element yagi- G3PTO antenna drawing plan for a 50Mhz 6 Element Yagi

    50 MHz Antennas by DF9CY (4 & 6 Element)- Two well performing 50 MHz antennas designed with W7EL

    50 Mhz Antennas By ON4ANT

    50 Mhz Cluster- OH2AQ 50 six meters cluster

    50 Mhz Dx & Audio Files- Lage collection of 6 Meters and 2 meters QSOs, recorded in real audio format by OE3MWS

    50 Mhz Hentenna- A light weight portable antenna for 6m

    50 Mhz J-pole antenna- A project for a jpole antenna for the six meters band.

    50 MHz Noise Canceling Receiver Front End- Reducing noise on six meter band

    50 Mhz Operating Code of Practice- Recommended Operating Code of Practice as issued by the UKSMG

    50 Mhz yagi plans- 5 Elem. yagi for 10 meters, 9 element yagi beam antenna for six meters band by ON4ANT

    50 Mhz yagis- Three Yagi antennas for the six meters band by 9A7PJT. Include a 4 element yagi

    50 Ohm Coaxial Dipole - This dipole is composed by a coaxial structure and non-folded dipole

    50MHz J-Pole Antenna pop- Need a general purpose antenna on the magic band?

    50MHz Moxon Rectangle- N3ox 6 meter moxon rectangle, pictures and assembly notes

    50-MHz Real Audio Clips- Audio clips from cycle 20 to cycle 23, includes some interesting audio files dated 1969 and 1979.

    50MHz Sound Archives- Real Audio sound archives from H44PT cycle 21. Also from cycle 23 G8BCG, Z2/G8BCG, ZB0/G8BCG.

    50MHz-Transverter 10m/6m from DK7ZB- This transverter was built in 1994

    6 and 2 Meter Square Copper Dipoles- The 2 meter Square Copper Dipole by KØFF

    6 element 28 MHz LFA Yagi- Six elelemt yagi for ten meter band, designed with the very latest PSO computer optimisation engine.

    6 element Log Periodic for 50 Mhz- A project by G3SYC of a log periodic antenna for 6 meters band

    6 element UHF Yagi antenna- A standard 6 elements design scaled for UHF application.

    6 Element Yagi for 432 Mhz- U6YRN 6 element yagi antenna for 430-450 Mhz in spanish

    6 Meter 3 Element Quad- Starting from an original project for a 2 element quad antenna for six meter band...

    6 Meter 5/8 Wave Vertical Antenna- The G3JVL 6 Meter ground plane vertical is a compact antenna

    6 meter DX by N2FFL- Includes many links related to magic band and also a collection of grid square maps

    6 Meter DX Map- 6 Meter DX Map with reports from the VE7CC DX Cluster

    6 meter HexBeam antenna- SP3FHI hexbeam antenna built with bamboo sticks

    6 meter horizontal dipole- Homebrew project of a dipole for six meters band by KK5ID

    6 Meter J-Pole Antenna- Amateur radio project by W8CWE

    6 meter omni halo- This halo is made with a true Gamma Section this time and is fashioned from aluminum

    6 meters Delta Loop by KK5ID- The 6 Meter Band may be dead at times, but help bring it to life with Larry's rotatable loop project.

    6 Meters Online- 6 Meters Online. A site for 6m enthusiasts with propagation reports, forums, webcams and more.

    6 meters Quagi- A six meters band Quagi antenna project

    6/9 element VHF Yagi antenna- ON6MU optimized 6/9 element vhf yagui antenna

    600:50 Ohm Baluns- Low-cost 600:50 Ohm Baluns by Andrew Corney ZL2BBJ

    6-Band HF Center-Loaded Off-Center-Fed Dipole - From Serge, ON4AA

    6dB COLINEAR VHF ANTENNA -- From Harry Lythall - SM0VPO

    6dB colinear VHF antenna- Building details of a VHF colinear antenna with 6 db gain

    6dbi Colinear Antenna for Wireless LAN updated

    6el 70MHz Low Noise LFA Yagi- A Super 6 element LFA Yagi for 4M. 5.15 mtrs long and 12.4 dBi.SWR throughout.

    6M and 2M Yagi -- From The Antenna Elmer

    6m Duplexer project- 50 MHz Duplexer Project by NZ5V

    6m DX News page- Edited by Oz6OM to find out who's on 50MHz expeditions anywhere around the world.

    6m Half wave vertical- This antenna is very useful for receiving or scanning purposes, but you can use it for transmitting

    6m SSB & CW QRP transceiver- Block diagram, schematics pcb layout and pictures of a CW QRP transceiver for 50 Mhz

    6m technical docuemnts- A collection of scanned diagrams and designs, documents and modifications for 50 Mhz

    6m vertical antenna- G3JVL Six meters ground plane vertical is a compact antenna that is ideal for portable operations on 50 Mhz

    6M Yagis a Bunch -- From The Antenna Elmer

    6mt.com Six Meters World Wide- Devoted to 6 meters and consist of The Six Club and technical files for vhf through microwave

    7 band semi-vertical antenna project- Don't buy or build a semi-vertical trap antenna until you read this article!

    7 element Yagi for 70MHz- Build a 7 Element 4M (70MHz) Beam By Paul Graver, M1CCZ

    7 Elements YAGI for 144 Mhz- The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz

    7 MHz Dipole at VK1ZKD- This article documents an unobtrusive antenna for operation on 7MHz...

    7 MHz Vertical antenna- 7 MHz Vertical antenna for ham radio - 40 meter band in spanish

    70 cm ATV Antennas- Home made antennas, ATV stuff, 70 cm antennas, helix antennas and a lot of intresting pictures to view

    70 cm ATV Antennas updated pop- Home made antennas, ATV stuff, 70 cm antennas, helix antennas

    70 cm helix antenna- An Helix antenna for 70 cm band and satellite reception

    70 cm home made antenna- Schematic of a 70 cm vertical antenna

    70 cm Moxon- 70cms Simple Moxon 2 elements antenna

    70 MHz Antenna- OZ1BXM 70 MHz horizontal dipole antenna

    70 MHz Big Wheel- A Big Wheel antenna for 4 meters band by OE5MPL

    70 Mhz Hentenna- The Hentenna was developed by JE1DEU / JH1FCZ/ JH1YST in Japan during the 1970's.

    70 Mhz Moxon antenna- A Moxon rectangle antenna for 4m by Ross G6GVI

    70cm 2 x 11 elements Cubical Quad- A group of 2x11 elements all grounded quad antenna for portable operation

    70cm colinear- An home made 70 cm colinear antenna at M1KTA blog

    70cm Longyagis- 70cm-Longyagis in 28Ohm-DK7ZB-Design

    70cm Magnetic loop updated- UHF magnetic loop antenna by PA3CNJ

    70cm Magnetic loop version- Second version of the UHF Magnetic loop by PA3CNJ

    70cm Magnetic loop version- Second version of the UHF Magnetic loop by PA3CNJ

    70cm Quadruple Quad- A suitable high gain 70cms antenna for SOTA operation by Richard Price GW0VMW

    70cm vertical antenna- Schematic for a DIY 70 cm vertical antenna

    70cm yagi antennas- Pictures and plans to build 70 cm yagi antennas

    70cms and 2m Dual Band Aerial- A prototype antenna built using a single approx. 2.3 meter length of 4mm stainless steel wire

    70Mhz 5 element yagi- Pictures, design plan and description of a 5 element yagi antenna for the 4 meters band by 9A7PJT

    70MHz-Yagis- Various Yagi antennas for 70 Mhz band

    75 Meter Delta Loop Beam- A delta loop project for 75 meers band

    7db for 7 Bucks- 1993 QST Article of a 2 meter beam antenna by WB0CMT

    7db tape measure yagi beam for RDF- A 3 element yagi beam antenna made with a tape measure.

    7elements 21MHz OWA Yagi- An Excellent 15M compact 7el OWA Yagi for the 21MHz band.

    7elements yagi for 70MHz- 7ele homemade DK7ZB yagi for 70MHz

    7Mhz Vertical antenna- The secret with this antenna is to install as many radials as you can around the base of the antenna...

    8 Element Quad for 145 Mhz- 8 elements quad antenna for 2 meters band, centered on 145 Mhz

    8 Element Quagi Antenna for 70cm- Quagi 8el 70cm improved 13.77dBi by IK1HGE

    8 elements Yagi for 70 cm- 70 cms 8-element Yagi Beam

    80 & 40 Meters vertical antenna pop- May work on 160 meters too, by EI7BA

    80 m 3/4 wave LLV- This is a vertically polarized Phased array. The left Vertical wire is 180 degrees out of phase

    80 m four square vertical- NA4L wire four square vertical array for 80 meter band

    80 m helical antenna- Prototype of a 80 meters helical antenna on a 6 meters squid pole by VK2TTL

    80 m shortened Dipole- DL2HRF shortened dipole antenna for 80 meters band

    80 m sloper- KC4HW show mounting hoardware of his 80 meters sloper antenna

    80 Meter Antenna -- Reduced Size For Small Lots

    80 Meter Frame Antenna -- From Harry Lythall - SM0VPO

    80 meter frame antenna- This projects was developed as a result of experiments to become QRV on 80 meters - by SM0VPO

    80 Meter horizontal loop antenna- FULL WAVE LOOP ANTENNA An horizontal full wave loop antenna for the 80 meters band

    80 Meter Inverted Vee From GERRY VE3GK 

    80 meter loop antenna- PA1G loop antenna for 80 meters band, in dutch

    80 Meter Pizza Pan Antenna- This is a resonant, half-wave, vertical antenna.

    80 Meter Vertical Experiment- 80 meter vertical experiment by Bob Raynor N4JTE

    80 Meter vertical Loop- An 80 meter band vertical loop antenna setup at PA3FUN

    80 meters beacon antenna- A vertical antenna for vk2zay 80 metre CW beacon.

    80 Meters EH Antenna plan- Building this antenna is very easy and inexpensive, 6 Foot EH Antenna

    80 Meters frame antenna pop- Frame antenna for 80 and 160 meters band

    80 meters Short Dipole- The best antenna is the simple Dipole. If you have height, you even can put up a quarter wave vertical

    80 meters spiral loop antenna- N4SPP 80 meters band spiral loop antenna based on SM0VPO design

    80 meters wire antenna- A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP

    80 Metre Slinky Dipole For QRP - From M0WYM

    80/160 Dual band vertical- antenna is constructed from six 12 foot aluminum tubes to form a slip-up mast antenna some 60 feet high

    80/40 Meter Vertical From EI7BA

    80/75 Meter 4-Square Array- This array has been in use since 1989. The SWR from 3.5 to 3.9 is below 1.5:1.

    80-10 Meters Doublets antennas- All band doublet antenna based on NB6Zep's design and an 88 foot flatop version

    802.11 2.4Ghz Low-Power Vertical Antenna- A 2.4Ghz low-power 5dBi vertical collinear antenna for 802.11 applications

    80-40-20 Meter Dipole antenna- Multiband dipoles capable of operating on 80 through 6 meters band with a tuner by KJ4EX

    80m / 40m Dipole- Build instructions for the 80-40 dipole antenna including Ugly Balun 40m trap and 80m Dipole

    80m 2 element project- A 2 element beam antenna for 80 meter band by ha8rm

    80m 2 element Yagi antenna- 2 elements short boom yagi for 80 meters

    80m 4 element delta loop antenna- A four element delta loop antenna for the 80 meter band

    80m 40m Vertical antenna- HF2 antenna, home made vertical antenna

    80m Band 5 Element Delta Loop- Design of a 5 elements delta loop beam antenna offering a high F/B ratio and 7.5 dbi gain

    80M EH Antenna- pictures of a 80 mt band EH antenna by YC5NBX

    80M Field Expedient Dipole Antenna- 80M field expedient antenna, suitable for NVIS operations

    80m full size 1/4 wave GPA- A ground plane antenna for 80 meters band

    80m L Antenna. RSBEV's- Reduced Size Broad Elevation Verticals

    80m Loop EZNEC Analysis- Antenna data, and design note for this horizontal loop antenna resonating on 80 Meters by K0ZE

    80m mobile antenna- The antenna is made in four sections which consists of a base matching coil, a helical section - by G4DCH

    80m OCF Dipole-simple 7 bands off-center dipole wire antenna designed to work on 80 meters band

    80M Vertical antenna with capacitance hat- antenna cheap to make, using readily available materials, Low angle radiation...

    80m Vertical Loop- The configuration of this antenna is a triangle with apex in the top of a very tall tree.

    8el 50Mhz / 70Mhz Dualband Yagi- Only just over 6 foot long, a compact 8 element dualband Yagi for 6 and 4 meters band - by G0KSC

    8-Element 430 MHz Quagi- Picture and notes of a 8 elements Quagi antenna for 432 Mhz b Paul Bock, K4MSG

    9 band vertical HF antenna by RW3XA pop- Simple vertical radiator with matching box. No traps, no tuner required.

    9 dB, 70cm, Collinear Antenna From Coax -- Version I -- From N1HFX

    9 Element for 432 MHz- DF9CY 9 Element yagi antenna for 70 cm band

    9 element yagi for 2 meters band- A simple design of a 9 elem. yagi antenna for 2 meters band

    9 element yagi for 2 meters band pop- A simple design of a 9 elem. yagi antenna for 2 meters band

    900 MHz antenna- VE3CVG's 900 MHz 7 Element Plumber’s Delight Yagi Antenna

    9H1PI Ivan- Home Page of Ivan, 9H1PI, QRV from the island of Malta on 50 MHz.

    A $50 Beverage pop- This antenna makes 80 and 160 enjoyable.

    A 10 metre EH Antenna- An EH Antenna for 10 meters by Lloyd Butler VK5BR

    A 146 Mhz J-Pole Antenna- A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build.

    A 146 Mhz J-Pole Antenna updated pop- A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build.

    A 2 elements yagi antenna for 28 Mhz- An inexpensive antenna for 10 meters band in spanish

    A 2 Meter phased array antenna- Phased array Ground Planes antennas for 144 Mhz

    A 30/40 meters band vertical anetnna- A shortened 30/40 meters band vertical antenna in italian

    A 40m Vertical- This antenna is intended as a simple

    A 5-element beam for Four- 5-element antenna, with which G0JJL has worked lots of EU crossband, and won the RSGB...

    A 6m portable 4 element quad- This antenna is based on a design for a portable 2 element 6m Quad by VE7CA...

    A 70cm Big Wheel Antenna- This is a 70cm big wheel antenna which is used at DB0FAI beacon

    A 9:1 Balun- How to DIY a 9:1 balun in french

    A 90 foot irrigation tubing vertical- Experimenting with making vertical antennas out of aluminum irrigation tubing.

    A balun tutorial design- A balun tutorial discussing a number of aspects of the design and construction of baluns

    A Battle creek special by PI4CC- On this page we will show you 2 versions of the Battle Creek Special.

    A better antenna-tuner balun- Which balun to use?

    A Bird Yagi Antenna- Pictures and detail of contruction of a bird yagi for 10 meters and pictures of the 6 meters version

    A Bird Yagi Antenna- Pictures and detail of contruction of a bird yagi for 10 meters and pictures of the 6 meters version

    A centre-fed co-axial dipole for 4m- Easy to setup dipole antenna for 4 meters band by Tony Hawker G4CJZ

    A centre-fed co-axial dipole for 4m- Easy to setup dipole antenna for 4 meters band by Tony Hawker G4CJZ

    A centre-fed co-axial dipole for 4m- Easy to setup dipole antenna for 4 meters band by Tony Hawker G4CJZ

    A cheap and easy TV antenna- A simple, cheap, efficient tv antenna that you can make yourself.

    A cheap dual band ground plane antenna- This little antenna is cheap and easy to build, lightweight, and very functional...

    A Collapsible 2-Element Delta Quad- This easy-to-build and inexpensive 2 meter antenna is also made to store easily.

    A comparison of commercial 4m verticals

    A Dipole for 40 80 160 meters- A space efficient dipole antenna that can cover from 40 to 160 meters band using traps for 7MHz

    A dipole for 6 meters band- Six meters band dipole horizontal or vertical

    A double dipole for 14 and 21 MHz- A double dipole for the 20 and 15 meters band in french

    A dual band wire beam for 17 and 12 meters- This wire beam Moxon antenna offers double duty on 17 and 12 meters

    A Full Wave Loop for 80 - 10 Metres- VE3HCR article of a home made loop antenna for 80 meters band

    A High Gain Mode J/B Yagi Antenna- A 70 cm and 2 m arrow-like antenna by DF8GH

    A Horizontal loop for 80 meter dx- This 80-meter quad loop system requires only supports of modest height...

    A J-Pole for 2-meters and 70-cm updated pop- An Easy Dual-Band VHF/UHF Antenna from QST September 1994

    A linear loaded vertical antenna- Vertical antenna design by David Reid PA3HBB G0BZF

    A low cost fishing pole vertical antenna- This antenna is based on a 10 Metre long fibreglass fishing pole, by G4AON

    A magnetic loop antenna for HF updated - Able to cover all frequencies between 3.5 and about 10 MHz

    A model of the W2DU 1:1 choke balun- Notes on making the W2DU choke balun

    A Moxon for UHF- A moxon antenna for UHF in french

    A multi-band super mini loop antenna- To build this antenna you need a lot that is at least 100 feet across.

    A portable 10/20/40 mt vertical antenna- A portable vertical antenna for 10 to 40 meters

    A Portable 20 Metre DX Antenna- A Vertical 2-element Moxon Rectangle

    A portable 2-element VHF yagi- Build a portable VHF yagi antenna for 2 meters.

    A Portable Multi-Band Magnetic Loop Antenna pop- Described here is a simple multi-band magnetic loop antenna

    A Practical Antenna for 160 Metres- 140 feet of insulated wire, the first half of which (70 feet) is space wound on an insulated tube.

    A Practical Antenna for 160 Metres pop- 140 feet of insulated wire, the first half of which (70 feet)

    A quadrifilar helix weather satellite receiving antenna- This article describes how to make a quadrifilar helix (QFH) antenna easily...

    A short Quagi for 1298Mhz- Based on K5OE design by GM1SXX

    A Simple 7 element Yagi calculator- A JavaScript to calculate the dimensions for a seven element Yagi-Uda Antenna

    A simple 70MHz antenna- A simple way to make a yagi antenna four metre antenna.

    A Simple But Effective Low-Band Base Antenna- A vertical antenna for Six Meters band

    A Small Loop Antenna for Forty Meters- Article on a small loop antenna for forty meters band by Ben Smith, W4KSY

    A Small Wire Loop Antennas for 160 meters- Low noise, receive only coax loop antennas for 160 - 10 meters HF bands

    A standard double bazooka antenna- Article by Ed WE6W on a double bazooka antenna

    A Stealthy 75 meter antenna updated- The 75 meter dipole at K7ZB was put up to meet the need for making contacts with friends...

    A tri-band 2 element portable Yagi- Additional notes and eznec file on original article of a Portable 3-Band Yagi antenna

    A turnstile antenna for 2-meter ARDF- Antenna design for use with hidden transmitters on international-rules ARDF events

    A two band halo for VHF Mobile- 50 and 144 Mhz with a single mobile antenna system

    A two dollar helical hf portable antenna- Here’s an easily transportable vertical antenna for 20 meters...

    A UHF Discone Antenna for scanners- Article on discone antennas by William K2MQJ and Rudolf KA2CWL

    A vertical dipole for 7MHz - A vertical dipole for 7MHz and 21MHz by OH3GGQ

    A Vertically Polarized Delta Loop for 40m- Practical contruction and designing notes of a delta loop for the 40 meters band

    A wideband 80 meter dipole- This worthy antenna is so simple and inexpensive you will want more than one by N6LF

    A Wire Beam Design for 80 meters- by Dave Robbins, KY1H

    About Baluns- General article on Baluns at myantennas.com, what is a balun and when to use baluns

    About Common Mode Choke- A general article on CMC, common mode choke include a description and tipical usage.

    About Vertical Antennas- SM6EHY on verticals below 10 MHz

    AD5WB Vertical Antenna Installation- Pictures and description of a SteppIr vertical antenna

    Add 60 meters to butternut vertical antenna- is a great antenna in that it covers all HF bands from 160- though 10-metersmeters.

    Adventures in GPS antenna construction- Adventures in amplified GPS antenna construction; an experiment

    Aerial Calculations- G4URH calculations to design your own antennas, ground plane, half wave antennas

    Aerialacts- MaxiMoxon is aerialacts trade name for its line of compact, monoband, two-element

    Alford 1.2 Ghz ATV Antenna- Antenna tests on Alford 1.2 Ghz for ATV oprations in italian

    All Band Dipole- Antenna suitable for all the HF amateur bands, including the so called WARC bands by vk6ysf

    All-band Wire Antenna - From Joe Tyburczy, WB1GFH

    Alpha Delta Communications- Manufacturers and distributors of coaxial surge protectors, coaxial switches, HF fixed wire antennas

    AM Loop Antennas

    Amateur Vertical Antenna Calculator- This calculator is designed to give the vertical length (height) of a particular antenna...

    An 80-160 magnetic loop antenna- A classic diamond shape loop antenna that works fine on 80 and 160 meters band.

    An antenna for 7MHz local contacts- This article describes the design of an antenna for local contacts

    An effective 3 band Wire DX aerial- A 3 band dipole for 10 15 and 20 meters band by Mel G4WYW

    An improved 40-80 double extended zepp- Article originally published in ARRL compendium by N6LF

    An Improved Multiband Trap Dipole Antenna- This improved multiband trap dipole introduces a new trap design

    An indoor VHF stealth antenna- VHF Delta loop antenna

    Analysis Of Antenna Mast Strength and Bending Stress- Calculations for determining the wind loading stress on an antenna mast.

    Another Ugly Choke Balun- A home made balun build using a short length of 4 inch drain pipe and 18 foot of RG58 by G4APL

    Another vertical antenna for 30, 40 and 80 meters- This article is to describe a multi band DX-dedicated antenna

    Another way to look at vertical antennas- What iss the difference between a dipole and a vertical? Maybe not as much as you think.

    Antena Bazuca- Drawings and short descriptio in spanish for dipoles and bazooka antenna.

    Antena Multibanda Colinear para HF- A W5GI antenna description in spanish

    Antenna Application Notes -- Antenna and Feedline Measurements, Return Loss Bridge Basics, Duplexer Tuning using Bridge

    Antenna Baluns- ON9CVD antenna baluns general informations.

    Antenna Baluns: What they are- Baluns what do they do, in a pdf file by W7EL

    Antenna Basic Radiation Theory-- From The ARRL

    Antenna Basics and Theory -- Excellent - From VK2DQ

    Antenna Basics and Theory -- Excellent From Integrated Publishing

    Antenna Basics and Theory -- Excellent Tutorial From Scott's Pages

    Antenna Basics and Theory -- From Ian C. Purdie, VK2TIP

    Antenna Basics and Theory -- WOW -- See this One -- From Navy Training Series

    Antenna Components- Current Balun, Coax Sheath Current Choke, Inductor and insulators

    Antenna Construction Tips -- Metals to use. From Bob Hejl - W2IK

    Antenna Design and Software From G4FGQ -- Loaded -- many antenna design programs, coax rating

    Antenna Design Information & Software -- From S-Meter.Net

    Antenna Dimension Calculators -- From The Antenna Elmer - Click On Antenna Type

    Antenna Dimensions Calculator - Dipoles From KWARC

    Antenna Dimensions Calculator-- Dipoles From AMANDX

    Antenna Discussions -- Lots Of Antenna Info From the CQ Contest Archives 

    Antenna Discussions -- Tons of Antenna & Tower Info From the Tower Talk Archives

    Antenna elevator system for amateur satellites- Smart homebrew antenna-ELEVATOR system with linear actuator.

    Antenna for 40 / 80 meters- A dipole antenna that can be used in 40 and 80 meter band in portuguese

    Antenna for deed restricted lots- An effective 10-20m DX antenna for deed restricted lots, original article by K7ZB

    Antenna for deed restricted lots pop- An effective 10-20m DX antenna for deed restricted lots, original article by K7ZB

    Antenna Height Above Average Terrain- Antenna Height Above Average Terrain (HAAT) Calculator

    Antenna Height? -- How High Should They Be? -- By Mike Banz, AA3RL

    Antenna here is a Dipole- What is a dipole antenna and why are they so popular ? Arrl PDF file

    Antenna Loading Coil Calculation- The calculation refers to either a loaded 1/4 wave or a loaded dipole,

    Antenna Loading Coil Construction Techniques- This page explains how to construct high-Q inductor coils.

    Antenna Matching Coil Adjustment Procedure- Without this basic knowledge, addressing antenna problems, RFI problems...

    Antenna performance table by VE7BQH- Performance chart of VHF antennas in a stacked array

    Antenna Projects From The YCCC -- Double-L For 80/160, Two Wire Beverage, A Poor Man's 160 Meter 4-Square

    Antenna Restrictions - How To Chart - From The ARRL

    Antenna System Evaluator -- From KD6DKS

    Antenna Tilt Calculator

    Antenna Trap Calculator- Design your own antenna trap online

    Antenna Tuner Theory -- From The ARRL

    Antenna Tuners - How to use

    Antenna Tuners and SWR -- From The ARRL

    Antenna Tutorial -- From AeroCom

    Antenna wire catenary calculator- This is a simple calculator for solving the antenna wire

    Antenna Zoning for the Radio Amateur - ARRL Book On legal aspects of antenna restrictions 

    Antennas & More pop- Radio Amateur Antennas, Solar power, Antennas West products

    Antennas A Bunch -- From Ham Radio Spectrum

    Antennas basics- An antenna study guide by NZART, cover basic topics like dipoles, wave lenght calculation, baluns, beams...

    Antennas for HF mobile operation - The following description should give you guidance on how to build a mobile antenna

    Antennas for Portable Use -- Comparisons

    Antennas for the Low Bands- Articles on TX and RX antennas for the low bands, 80 and 106 meters by John Tait

    Antenne Topfkreis updated- A simple vertical antenna for 70 cm band

    Antenne verticale HF.- A vertical antenna project than can present low swr from 40 to 10 meters by using a balun in french

    Antenne VHF TOPFKREIS updated- A HB9BBN VHF antenna by F5KIN

    Antennex -- The Ham Antenna Magazine -- all about antennas -- on line 

    Anteny SP1BKS- Antenna manufacturer from Poland, produce dipole wire antennas, W3DZZ FD4 Windom and long wires, baluns...

    ARRL Antenna Projects Web Page -- Includes Beams/Yagis, Dipoles, J-Poles, Quads, Slopers, Verticals

    Attic 30 m dipole antenna- A full size half-wave 30m dipole installed in an attic

    Axial-Mode Helical Antenna Calculator updated- Simple implementation of the ARRL Antenna Book

    B&W Balcony/Window Antenna - AP-10A

    BackPack Antennas -- From HFpack, The HF Portable Group.

    Backyard 7 Mhz Vertical - A vertical antenna for 40 meters band by PA5MW

    Balcony Antenna -- From Harry Lythall - SM0VPO

    Balloon and Kite Antennas On The Top Band -- From G4VGO

    Balloon Antennas -- From HCDX

    Balloon-supported verticals- Using balloons to raise lengths of wire can be great fun

    Balun and Transformer Core Selection- Occasionally errors are made regarding core selection.surface.

    Balun compilation- Collection of many home made baluns

    Balun construction - problems with iron cores- Lots of information and measurements relating to HF baluns and transformers

    Balun Construction- Construction and use of broadband transformers

    Balun construction- PDF files describing how to homebrew a 1:2.5 balun

    Balun for HF wire antennas pop- Schema of a self made balun used to match randmon wire antennas

    Balun Information - Baluns for HF application resource page

    Balun measuements- Why can't you find the specifications for the baluns on the market?

    Balun Test- How test a Balun quality by W8JI

    Balun Theory pop- The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one

    Baluns - by ON9CVD- The simple 1 : 1 balun is being know in a variety of constructions. A dedicated chapter seems appropriate

    Baluns -- IZ7ATH

    Baluns - W8JI Antenna Articles Toroid Balun Winding * Balun and Transformer Core Selection * Transmitting Baluns

    Baluns and acceptable power updated- Baluns / Ununs design and acceptable power

    Baluns and Choke Baluns -- From Ian C. Purdie, VK2TIP

    Baluns and Transformers- Notes on homebrewing baluns and transformers by G8JNJ

    Baluns Articles Collection- A PDF file with a compilation of articles about baluns taken from differen sources

    Baluns by Dan N5AR- There is considerable confusion about the various types of baluns, this article try to make it clear.

    Baluns in antenna systems- Understanding Baluns. 

    Baluns in theory- A complete reference on building baluns

    Baluns on Log Periodic Antennas- Some antenna manufacturers place baluns at the incorrect location in LPDA arrays

    Baluns What Do They Do -- From W7EL

    Baluns: theory and projects pop- All about baluns with photos, projects and instructions, by IZ7ATH

    Baluns: What they do and how they do it- Article on Baluns and how they works, by W7EL

    Bandwidth extension on 80 Meter Dipoles- Extending The Bandwidth of 80 Meter Dipoles

    Barker & Williamson- Dipole antennas, unique broadband antennas, trap dipole antennas, coils, accessories for HF radio

    Basic Balun Theory- Baluns are still a mystery to some radio amateurs and the only way

    Battle Creek Special -- Info From OK1RR -- Under Antennas

    Bazooka antenna for 40 meters- A bazooka antenna project for the 7 Mhz

    Bazooka Antennas -- From WE6W

    Bazooka antennas at QRP-L- Posts on bazooka antennas at qrp-l mailing list

    Bazooka antennas at towertalk- Posts about bazooka antennas at towertalk mailing list

    Bazooka antennas compared to dipoles- Article and comparison between bazooka antennas and dipole

    Bazooka Calculator- Calculate Double bazooka for Win3/Win95 by W4BEJ

    Bazooka Calculator updated- Calculate Double bazooka for Win3/Win95 by W4BEJ

    Bazooka dipole for 70 cm band- Here is a very simple 70cms dipole from Harald PD2HFE

    Bazooka vs Dipole- Discussion, will a double bazooka outperform a dipole, enough to notice a difference on 40m.

    Beams/Yagis -- From The ARRL

    Bean Tin Antenna for 15 m- GM4BKV article on how to recycle our rubbish and produce a cheap and effective 15m antenna

    Bent Dipole with gain- Bent dipole plan by G8MNY

    BerlinFunk- Ham Radio dealer from Berlin Germany

    Beverage Antennas -- From The DX Zone

    Beverage Transformer Calculator- W0FMS Two-Wire Beverage (SWA) Transformer Calculator

    Bicycle Rim Antenna for 20 Metres- A small transmitting loop antenna for 20 metres using a aluminium bicycle wheel rim.

    BiQuad Antenna calculator updated- Online calculator for Bi-Quad antennas

    BiQuad For 2m/440 - FROM KE4UYP

    Boom for phased delta loops- Antenna boom to support 40 meter phased delta loops

    Broad Band Dipole for 80m- Mesh constructed with enamelled wire 0.5 mm diameter

    Broadband 80/160 Meter Dipole- An easy to build single wire antenna for 160 and 80 meters

    Broadband Baluns- Voltage baluns and choke (or current) baluns.

    Broadband Dipole 2MHz o 30MHz with no ATU-

    Broadbanding the half-square on 80 meters- N6LF discusses a simple way to broadband the classic half-square antenna

    Broadside Arrays -- From Integrated publications

    Broomstick Special -- A compact, easy-to-build shortwave antenna

    Bruce arrays for 80 and 160m- Antennas with gain and bandwidth for 80 and 160 meters band.

    BuddiPole -- W3FF Products

    Buddipole by ZR6KMD- A rotateable dipole specifically for the 20m based on W3FF Buddipole design by ZR6KMD

    BuddiPole HomeBrew -- From W3FF

    Build 80 Meter Vertical Antenna- Article on how to build a vertical antenna for 80 mt band, at ehow.com by S J Wamback

    Build a 12/17 Meter Trap Dipole- Phil Salas AD5X project on homebrewing a rotatable dipole for 12 and 17 meters band

    Build a 2 Meter 5/4 Wave Antenna pop- This antenna is unique in that it is enclosed entirely in 3/4" PVC by N1HFX

    Build a 2.4GHz Vertical antenna pop- Building a 2.4GHz vertical collinear omnidirectional antenna

    Build A 9dB, 70cm Collinear Antenna- 70cm, Collinear Antenna From Coax

    Build a bazooka dipole pop- Build Your Own Bazooka Dipole: A VHF/UHF vertical dipole made from coax

    Build a Double Bazooka HF antenna pop- Build a double bazooka coaxial dipole, broad-band dipole antenna

    Build a hanging dipole for 2 metres- Described here is a simple omni-directional, vertically-polarized dipole for two meters.

    Build A Magnetic Loop- Documents and schema on how to build a Magnetic Loop Antenna fo 80/30 mtrs

    Build this Novice 4 band vertical- Home made vertical antenna for 80 40 15 10 meters ARRL PDF file taken from QST June 1978

    Build your own 20m vertical- Build your own 50ohm coax fed 20m vertical antenna, so easy a 9 year old can do it, or at least help!

    Build Your Own Coils- A method of building coils for your home made antennas

    Building A 2-meter J-Pole Antenna By Jaden

    Building a Low Power Beacon for 6m- by Ken Neubeck WB2AMU

    Building a sextuple ratio balun- Article on homebrew a six separate impedance settings out of a triple radio balun

    Building baluns pop- How to easily home-brew baluns even in strange formats 1/1 - 2/1 - 4/1 - 6/1 - 9/1 - 12/1 et 16/1 for bands

    Building Coils- Building coils for a portable dipole using a novel method of winding coils with weedeater cord! By K4MMG

    Building High Power, High Q, Loading Coils- This page describes the loading coil (inductor) that W8WWV

    Bushcomm Antennas- Dipole, broardband antennas s/s, portables, manufacturer based in Perth, Australia.

    Bushcomm HF Antenna Systems- Australian manufacturer of HF Communications Antenna Systems for Military

    Butternut HF9V Project- WB3AAL setup project of the popular HF9V vertical antenna with report on tuning it on ham radio HF bands

    BVO2 Yagis- Yagi beam plans for 144MHz band

    BVO70 Yagis by DJ9BV- The latest and best yagi beams for 432MHz tested and optimized with NEC

    C pole antenna by W5USJ- A sample implementation of the C-Pole antenna for the 14 Mhz without making use of the pole.

    Cantenna Calculator updated- Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

    CantennaCalc- Kioan's calculator for building a Cantenna , directional waveguide antenna for long-range Wi-Fi

    Car Roof Antenna for 20 meters- A project by G3LDO about a car roof antenna for the 14 Mhz

    Carolina Windoms - W2BLC

    Cedevita-20 Antenna- The Cedevita-20 is a hybrid monoband antenna, the result of merging the radiator of a shortened vertical

    Center-Fed Half-Wave Dipole - Nice Illustration From K7MEM

    Center-Fed Wire Dipole Antenna Tuning Calculator

    Cheap VHF/UHF Antennas pop- Cheap Yagi Antennas for VHF/UHF

    Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB

    Choke Balun Designs- In this designs G8ODE explains different methods to builds a choke balun

    Choke balun- Essentially, a choke balun is designed to 'divorce' your antenna from the feed line.

    Choke coax length- Discussion about choke length

    Chokes Explained- A "choke" is the common name given to an inductor that is used as a power supply filter element.

    Choosing Wire For An Antenna

    CliffDweller II antenna

    Coax Balun- A very simple coax balun

    Coax Bazooka type antenna- 2 metre and 70 cm Coaxial Dipoles, Double Bazooka type

    Coax cable dipole antenna for 10 Mhz- Coaxial Cable Dipole for 30 meters band by I2NDT

    Coax Connector Installation

    Coax Dipole Calculator updated- An efficient program to calculate dimensions of coax dipoles, or bazooka antennas

    Coax Monopole antenna- OE1MWW monopole antenna made with common RG 58 or RG 213 coaxial cable

    Coax Square antenna- N0KHQ Moxon rectangle for 17 meters, constructed from RG-58 coaxial cable

    Coaxial Balun pop- Coaxial balun plan by I0QM

    Coaxial cable dipole for 80m- Here are some simple antennas you can build along with calculators to help you get the right length.

    Coaxial Collinear Antenna -- 432 MHz -- From Via N9ZIA

    Coaxial-Cable Trap Dipole pop- An Attic Coaxial-Cable trap dipole for 10, 15, 20, 30, 40, and 80 meters

    Cobra UltraLite Antennas by K1JEK- The alternative multi-band solution, covers more bands than a G5RV

    CobWeb Antennas -- 5 Band From G3PJE

    Coil calculator- On-line single-layer coil designer

    Coil Designer - Mk 2- This page lets you do calculations for single layer air cored coils using the solenoid formula

    Coil Inductance Calculator- Calculate the inductance of a single-layer, air-core coil.

    Coil Inductance Calculator- Calculate the inductance of a single-layer, air-core coil.

    Coil loaded dipole for 80 meters- Coil loading of an 80m Dipole for restricted space.

    Coil measurement experiment- Comment on W5DXP 2011 coil measurement experiment

    Coil Q Measurements- Coil Q Measurements - With a special focus on wet coils.

    Coil Winding Tips- Tips on winding wire coils used as inductive loads, traps, band-pass filters

    Coiled Coax Choke Balun- A very practical Balun for aerial work is the choke type

    COILS Base, Top Loading, Matching Networks, SWR, Open Wire Line -- Tons More From G4FGQ

    Collinear antenna building updated- An interesting article about co-linear or collinear antenna building, by Karl Shoemaker

    Collinear Arrays -- From Integrated publications

    Collinear Microstrip Patch Antenna- Design of a 869 Mhz Collinear antenna

    Common Mode Choke Theory- A common mode choke may be used to reduce a type of electrical noise known

    Comparison of 70 Mhz antennas- Comparison of 50 and 70 Mhz antennas, commercial and home made projects

    Converting Half-Size G5RV for 80 meters- G8ODE schema to reduce a half-size G5RV to 70 ft.

    C-Pole antenna calculator- Based on the original design by Brian Cake, KF2YN this online calculator

    CQ Six - 50 MHz DX Information- 50MHz DX Bulletin edited by O. Bjørn Matt Madsen

    Cubic Quad- The cubic quad is a very popular way to get reasonably high gain and excellent front to back ratios

    Cubical Quad - Multiband - By EI7BA

    Cubical Quad Antenna Calculator- Easy Quad calculator, enter center frequency to get a quad antenna size

    Cubical Quad Calculator- A javascript calculator for cubical quad antennas

    Cubical Quads 10-12-15 Meters From IZ7ATH

    Current distribution in Coils- Current distribution in the antenna loading coils

    Current Through a 75m Bugcatcher Loading Coil- About experiments and measurements on loading coils

    Curtain Quad for 1296MHz -- From Ross W1HBQ 

    Cushcraft- Cushcraft Amateur Radio and commercial antennas HF and VHF vertical and yagi antennas owned by MFJ.

    Cushcraft R5 Matching Unit Rebuild -- by G0WCW using EI7BA method

    Cushcraft R7 Vertical...Maintenance and Repair

    Cushcraft Trap - Coaxial Capacitor Repair- Repairing coaxial capacitor on cushcraft trap.

    Cycloid Collinear, a CP Omni for 2M from Ross W1HBQ

    Dannex- Swedish manufacturer of broadband antennas designed for multi frequency

    DCTL Antenna- The DCTL antenna by WA6QBU

    DCTL Antennas and other compact antennas- The Distributed Capacitance Twisted Loop is an inexpensive

    DDRR - for 2M -- Directional Discontinuity Ring Radiator Antenna

    DDRR Antennas

    Definition of Collinear antenna array- Wikipedia page about collinear antenna arrays

    Delta Loop Antenna by WB3AYW- A Delta loop antenna project using an isosceles triangle by Leonard WB3AYW

    Delta loop antenna for 40 Meters- A full wave delta loop antenna for 7MHz

    Delta Loop antenna maintenance- IK4DCS experience on maintaining a multiband delta loop antenna for 10/12/20 meters.

    Delta loop antenna on on 26-30 MHz- Design your own delta loop antenna according to you characteristics.

    Delta loop antenna on on 26-30 MHz- Design your own delta loop antenna according to you characteristics.

    Delta Loop Antenna theory- A description page on how build delta loops antennas. In italian

    Delta Loop antenna- This DeltaLoop antenna has a length of 125 meters, divided into three sides of 40, 42 and 43 meters.

    Delta Loop by SQ2PLK- A delta loop antenna by SQ2PLK/M0PLK

    Delta Loop for 40 meters- A delta loop antenna for 7 Mhz used by IR8A team in italian

    Delta Loop for 40m- A 3 elements delta loop antenna model for 7 MHz

    Delta Loop for 50 MHz- A wire delta loop antenna project for six meters band

    Delta Loop for 50 MHz- Delta loop and vertical antenna plans with translation in italian

    Delta Loop for 50 MHz pop- Delta loop and vertical antenna plans with translation in italian

    Delta Loop for 7 Mhz band- Antenna experiment - Delta Loop for 7 Mhz band by AG1LE

    Delta Loop for 80m new- 80m band 2 element Delta-Loop beam antenna design made with EZNEC

    Delta Loop for 80m new- 80m band 2 element Delta-Loop beam antenna design made with EZNEC

    Delta Loop for HF- Planning delta loops antenna for HF bands by W5SDC

    Delta loops for 15 20 and 30 m- Full Wave Delta Loops for 15, 20 and 30m with perimiter dipole, quiet, low TOA, mono-band

    Delta Quad by F6CNE- A 4 element delta quad antenna for 15 meters in french

    Delta-Loop for 40 Meters- Two-element Parasitic Delta-Loop Array for 40 Meters by WB3HUZ

    Design your Own Super J Pole- Javascript for calculating the lengths of tubing to be used for the construction

    Desk Buddy 2M Antenna - From Bob W2IK

    DF9CY 11 Element for 432 MHz- A short good performing antenna for 70cm

    Digital on Six- Amateur radio digital modes on 50 MHz club page

    Dipole and Inverted V Antenna Calculator- Enter the resonant frequency for the dipole/vee antenna calculation

    Dipole Antenna Calculator and construction details -- From AMANDX

    Dipole Calculator in JavaScript- Input the desired resonant frequency and it will calculate lenght in inches feet and meters

    Dipole Height -- How High??

    Dipole/Yagi Antenna- DX dual dipoles by nb6z for 20 and 15 meters

    Dipoles -- From The ARRL

    Directional arrays- About collinear array antennas

    Discone - Parabolic - by Mike Lake KD8CIK - Highest gain discone antenna ever!

    Discone Antenna Calculator- Calculate dimension for discone antennas online

    Discone Antenna Design -- From QRZ

    Discone Antenna Project - From William Sheets K2MQJ and Rudolf F Graf KA2CWL

    Dismantable Yagi for the bands 10-17m- 10-12-15-17 meter band yagi antenna

    DK7ZB hentenna- Descriptions for 144-MHz- , 70 MHz- and 50-MHz-Reflector-Hentennas

    DK7ZB Yagi Homebrewing- Yagis for homemade with a new match-system, for 6m, 4m, 2m, 70cm and Shortwave

    DK7ZB-5-Band-Quad- 2 element Quand antenna for 10 - 12 - 15 -17 - 20 meters band

    DL6WU Stacking Yagi Calculator updated- DL6WU based stacking calculator for yagis stacking distances by G4CQM

    Do it yourself HF2V- HF2V dimensions for all the coils and capacitors.

    Double Bazooka

    Double Bazooka- A monoband antenna with large bandwidth in french

    Double Bazooka Antenna- A Bulgarian bazooka antenna project by LZ2ZK

    Double bazooka antenna- build your own double bazooka antenna with the following instructions

    Double Bazooka Antenna performance - is a half wave dipole with an attempt at compensation of the reactance change

    Double Bazooka by K4JRG- A double bazooka antenna for 80 meters band

    Double Bazooka Dipole- The Double Bazooka Dipole is a very efficient antenna which is very quiet

    Double Bazooka in attic- Discussion on Elmers Forum at eHam.net about setting up a bazooka antenna in an attic

    Double Extended Zepp Antenna- This double extended Zepp provides 3 db gain over a dipole on the band it is designed for.

    Double Extended Zepp Dipole -- Cut for 15 Meters

    Double Half-Delta Loop RX Antenna- This wire antenna was developed to offer for a small, low-band

    Double L Antenna for 160 and 80 m- Antennas ideas for 160 80 and 40 meters by HB9TPL

    Double Lazy H 435 MHz 10,8 dBd antenna updated- Drawings and pictures of compact antenna for 70cm band by LY2SS

    Double Quad Antenna- 435 MHz double quad antenna by F5WN

    Double T Bar Verticals- are vertical antenna with cross bars on the top and bottom.

    Double-Bazooka- Broadband dipole antenna, needs an antenna tuner but can reach 3db gain over dipole by WB6PFH

    Double-L Antenna For 80/160 -- Via The YCCC 

    Double-L For 80/160- Double-L Antenna For 80/160 by Don Toman, K2KQ

    Dr. Ace's Antennas -- From WH2T -- Inverted L, Mini Super Loop, Full Wave Loop, Double Bazooka Coaxial Dipole, Homebrew 4:1 Balun

    Dual Band 40m/17m dipole- A center feed dual band dipole for 40 and 17 meters by W5DXP

    Dual band 6m/4m Yagi- This antenna was optimized with the goal to minimize any changes in 6jxx6 impedance/lobes.

    Dual Band Dipole 20-40m- A simple dipole built for two-band operation can be used for portable use

    Dual Band vertical antenna for 20/40- A 20 and 40 meter vertical on Autopilot by K6MHE PDF File

    Dual Band vertical antenna for 20/40- A 20 and 40 meter vertical on Autopilot by K6MHE PDF File

    Dual Band Vertical On Autopilot- A good 20 & 40 meter dual band vertical

    Dual Band Wire Beam 12 and 17 m- The Dual-Band Wire Beam was inspired by L.B. Cebik's (W4RNL) article The Elusive Moxon Nest.

    Dual Loop 80 and 40 Meter- A dual loop antenna, ZZ Wave Net HF Wire Antenna Project by VE6VIS.

    Dualband 17m/20m Moxon- A moxon rectangle for 17 and 20 meters band by N3OX

    Dualband EH Antenna- A detailed project of a dual band EH antenna by F5IXU in french

    Dualband yagi for 50 70 Mhz- PA5DD version of the dual band yagi antenna for 50 and 70 Mhz

    Dualband-Beam 12/17 m- The beam has only one feedpoint with 50 Ohm and has an open-sleeve element for 12 m by DK7ZB

    Duo Band for 4 and 6 meters- A 6 element for 6 meters and a 7 elements for 4 meters duoband yagi antenna

    Duoband 5 element yagi antenna 4m and 6m - Here is data of YU7EF Pop 5 elm 4+6m dual band yagi antenna

    DWM Communications- Manufacturer and direct seller of shortwave and ham radio antennas

    DX Dual Dipole pop- Two dipoles fed from the same coaxial line by n6bz for 20 and 15 meters

    DX Dual Dipole pop- Two dipoles fed from the same coaxial line by n6bz for 20 and 15 meters

    DX Dual Dipole- Two dipoles fed from the same coaxial line by n6bz for 20 and 15 meters

    DXBeam- Located in France, DXBeam designs and manufactures a range of monoband, dual band

    DXpedition Antennas for Salt Water Locations- A study on 20m antennas by Kenny Silverman, K2KW

    Easy Delta Loop for 50MHz- Build your own delta loop antenna for 6 meters band

    Easy Delta Loop for 50MHz- Build your own delta loop antenna for 6 meters band

    Easy wire antenna for 40-20-10 meters- PE3HMP project of a triband wire antenna for 40 20 10 meters band

    Eco Antenne- Italian antenna manufacturer. Verticals, yagis, delta loops, mobile and wire antennas from HF up to VHF and UHF

    Efab Antenna Solutions- Antennas for the HF frequencies for portable or emergency field work.

    Effective HF Mobile Antennas- Effective HF Mobile Antennas Keith WB2VUO

    EGAntennes- Distributor of PKW antennas and Reimesch Kommunikationssysteme RF amplifiers.

    EggBeater Antenna - VHF/UHF From Jerry, K5OE

    EH Antenna calculator- Calculate eh antenna components dimension with this online form

    EH Antenna calculator- Calculate eh antenna components dimension with this online form

    EH antenna fo 160 mt by Iz7ath- EH antenna for 160 mt: my experiment and comparison with a short vertical.

    EH antenna for 14 Mhz updated- Documentation on how to build your own EH antenna for the 20 meters band by F5SWN

    EH antennas for 50 Mhz- EH antenna for six meters band by IW0BZD

    eHam Forum on Antenna Restrictions

    eHam.net CC&R Survival Series

    Eliminate QRM from 6 meters band- The circuit described below will substantially reduce or completely eliminate interference

    Eliminating TX RF Feedback Problems- Malfunction of transceivers due to stray RF pickup is a common problem

    EME Antennas -- Loaded With Big Antennas

    EME on 50MHz- Making EME contacts on six meter band. An US Experience using a pair of 8 yagi arrays for the 50 Mhz.

    End fed 20/30 Meter Antenna -- From W0VLZ

    End Fed Half Wavelength Antenna -- From AA5TB

    End fed halfwave antenna and matching unit- One is an EFHWA for 20-40 meters, and the other is a matching unit for the antenna

    Endfed 20/30 Mtr Antenna- Article with detailed pictures of an endfeed antennna for 20 and 30 meter band

    End-Fire Arrays -- From Integrated publications

    F5DQK Vinecon 6N4- A dual band antenna for 50Mhz and 70Mhz with lots of pictures and diagrams by F5DQK

    F5KIN HF vertical for 7Mhz- A 11 m fishing pole vertical antenna for 40 meters band in french

    F6EZX Deltaloop- F6ezx homebrewing a deltaloop antenna in French

    Fan Dipole For QRP -- From M0WYM

    Farapole homemade vertical antenna- The FARAPole, a portable vertical antenna for 6 through 20m by WA1GPO

    Feedback Rhombic -- -- From Ross W1HBQ

    Feeder Radiation- Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken

    Feed-Lines & Impedance Matching - From "Your Remote S-Meter" Pages

    Ferrite Loop Antenna -- for BC band -- From Oceanstate Electronics 

    Filters, RF: bandpass, lowpass, highpass, etc.

    Flags and Pennants -- Receive antennas for limited space with good noise rejection.

    Flower Pot Antenna for 2 and 6 mt- The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna.

    Folded Bazooka Antenna- Article on building a folded bazooka antenna

    Folded Dipoles

    Force 12- 9 Foot Vertical

    Four metre whip antenna- A homebrewed whip aerial for 70MHz by m0jrq

    Four square phased verticals- TK5EDP 4 square phased vertical system in corse isl.

    Four Square Vertical Phased Array -- From The Yankee Clipper Contest Club

    Fractal Antenna for ham radio bands- A Quad Fractale Antenna for 14 MHz band

    Full 1/4 wave vertical for 40m- Pictures and assembling description of a homebrewed vertical antenna for 40 meter band by ON7AMI

    Full Wave Delta Loop at Low Height- Article using a full wave delta loop antenna at low height, feeding methods

    Full Wave Loop Antenna 10M thru 80M 

    Full Wave Loop Antenna 10M thru 80M -- From Western Canada's Ham Radio YL Site

    Full Wave Loop Antenna 10M thru 80M -- From Western Canada's Ham Radio YL Site

    FVR Spitfire Array -- From The Yankee Clipper Contest Club

    G0KSC 70 Mhz and 50 Mhz Dualband Yagi- Direct feed, no matching required dual band Yagi

    G0KYA EFHW HF antenna new- A 11 pages pdf file about monoband or multiband end fed half wave vertical antenna

    G1RV ANTENNA- Maidstone Amateur Radio Society G1 RV antenna for 18 24 and 50 MHz

    G4CQM Homebrew VHF Yagi antennas- Homebrew VHF Yagi 50, 144, 432, 1296, 2320MHz 6M 2M 70CM 23CM 13CM Yagis

    G5RV 40m Beam Antenna -- From W5DXP

    G5RV Multi-Band Antenna by Louis Varney 

    G7CNF dual band yagi for 4 and 6 m- A 5 Element dual band, single feed solution for 4m and 6m built by Nigel Coleman.

    G8JNJ Broadband HF Vertical Antenna- G8JNJ Broadband HF Vertical Antenna - Requires no tuner

    G8VR a small Yagi for 50 MHz- Complete plans and drawings to build a Yagi for six meter band by Ken Willis, G8VR

    Gamma match example- A gamma match example

    GAP Titan DX performance test- GAP Titan DX Evaluation, antenna for 10m 15m 20m 40m 80m

    GAP Voyager mods- Gap Voyager modification for 30m band

    Giovannini Elettromeccanica- Quad, Yagi for low bands.

    GM3VLB Short Vertical Antenna- A short multi-band vertical antenna

    GPS Time Series- The Global Positioning System (GPS) is a constellation of 24 satellites

    Grid Yagi -- From Ross W1HBQ 

    Ground & Radial Systems -- From Butternut

    Ground and Radial Systems -- From SteppIR Antennas

    Ground Characteristics, Lightning Protection Grounds, Radio Frequency Grounds, and Practical Grounding Systems

    Ground Plane Antenna for 70 cm- It is easy to homebrew this quarter wave ground plane antenna for 70cm.

    Ground Plane for 7 MHz- How to build a ground plane antenna for the 40 meters band in french

    Ground Plane for 70 cm- A quarter wave ground plane for 70 cm

    Ground Plane for 70 cm- A quarter wave ground plane for 70 cm

    Ground Plane Verticals- Ground Plane antennas and common mode

    Ground System on a 160M vertical- Ground system measurements on a 160 M vertical by Rudy Severns N6LF

    Ground Systems -- From W8JI

    Groundplane antenna- Short guide to build your own groundplane antenna, includes radial measurements fro warc bands

    GW8IZR - A simple 70MHz antenna- A simple way to make a four metre antenna

    H5ANX Mk4 Delta Loop Design- Delta loop antennas design by Sajid Rahim

    Half Square Antennas -- From K3KY

    Half wave collinear copper jpole- Two meters collinear j-pole antennas made with riggid copper pipe

    Half Wave End Fed, No Radials Antenna -- From OE3MZC

    Halo Antenna 2M-- From N2KBK

    Halo Antenna 2M Square -- From N4UJW

    Halo Antenna 6M -- From W3DHJ

    Halo antenna for 70Mhz- Halo antenna for 4 meters band by IZ5HQB with pictures and assembling instructions

    Halo stack for 70 cm on the cheap- An halo stack antenna for 70 cm by KR1ST

    Handling GPS Antenna- Installation guidelines for static GPS Antennas

    HB9CV antenna calculator- Calculate dimension for HB9CV directional antennas

    HB9CV antenna for 70 cm- An HB9CV antenna for the 70 cm band in french

    HB9MTN C-Pole Porable antenna- A vertical monoband that's small, light and portable, needs no counterpoise and performs

    Heard on Six- The Real Audio 6m DXCC on the web by ik0fta

    Height Of Dipoles - Patterns By AA3RL

    Helical Antenna Calculator- This is my simple implementation of the ARRL Antenna Book

    Helical HF Portable Antenna- An easily transportable vertical antenna for 20 meters collapsible to 4 feet

    Helical loop antenna for 20 meters- A Helical Loop Antenna for the 20-meters Band

    Helix Antenna Calculator- Online helix antenna designer, calculate size of helix antennas online

    Helix antenna for 2 meters- Plan of a helix antenna for 2 meter satellite use by VK5ZAI

    Helix antenna with match calculator new- Helix antenna online calculator with match calculator

    Helix Calculator- JavaScript Implementation Written by Fred Spinner, W0FMS

    HenTenna -- From The N4UJW Antenna Design Lab

    Hentenna revisited- Developed by Japanese 6 Meter Hams in the 1970's can be designed and built for almost any band

    Hex Array - 80/40 Meter Vertical- This page describes a homebrew 80/40 meter trap vertical antenna.

    Hex Beam 20 thru 10M -- From K4KIO

    Hexagonal Beam - via EI7BA

    HF- and VHF-Yagi-antennas - HomeBrew -- From DK7ZB

    HF Antennas - Various -- From The ARRL

    HF Bazooka antennas- French page with bazooka antenna design information and bazooka calculator

    HF Beam Calculator updated- Calculate the Measurements for a 2 or 3 ele Beam

    HF Blaster- The antenna is designed to cover 40M through to 10M meters, mounted on a fishing pole and a 4:1 balun by 2E0SDR

    HF Copper Loop- A small transmitting loop antenna for 14MHz and 21MHz.

    HF Copper Loop for 20 and 15 meters- A Small Transmitting Loop Antenna for 14MHz and 21MHz.

    HF Helical Whip Calculator- Build your own HF helical whip antenna for mobile or portable operation

    HF Home made Balun pop- A balun is a device that is used at the feedpoint of a balanced antenna when an unbalanced...

    HF Magnetic Loop Antennas -- By Glenn C Sperry, KI6GD

    HF multiband vertical Antenna- YF1AR multiband vertical antenna, based on orginal concept by VE7BS.

    HF portable antenna - 40 to 6 meters pop- Phil Salas AD5X 40 through 6 meter HF portable multiband antenna

    HF Vertical antenna on a magnetic mount- A portable hf vertical antenna setup on a magnetic mount by I1UWF

    HF vertical ground systems experiments- Experiments on HF verticals with various ground systems

    Hidden, Stealth, and Secret Antennas from AC6TS

    Hidden, Stealth, HF Antennas -- From K3MT -- The GRASSWIRE -- You read it correctly!!

    Hi-Q Antennas- HF Ham Radio mobile operation antennas manufacturer, W6HIQ, HA5CMG, VE7BOC, HF mobile antennas

    HO Collinear, a Horizontal Omni for 2M from Ross W1HBQ

    Home Brew a 80 40 meter Vertical antenna- YF1AR 80 to 40 meter vertical antenna project

    Home Brew Loading Coil for AD5X Vertical- How to make a loading coil for the AD5X portable vertical antenna

    Home Brew Mobile 6M Halo- The Jones version of the Lawn Chair 6M Halo

    Home Brew VHF UHF dual band antenna updated - Contructing precedure and tune up of a dual band mobile antenna.

    Home made HF vertical antenna- An HF all bands 1.8 - 30 MHz vertical antenna

    Homebew RF chocke- RF Choke to prevent hf currents on the feedline

    Homebrew 50 Mhz Beacon- By Justin Glasener K9MU

    Homebrew a Bazooka Antenna- Home made bazooka antenna for 2 meters band

    Homebrew Buddistick 2007- W3FF article about the buddistick portable vertical antenna in a PDF file

    Home-brew Compact 6dBi Collinear Antenna- This page details the construction of an easy-to-make collinear 360 degrees

    Homebrew Pac-15 Vertical- This page shows a homebrew vertical antenna based on the Pac-12 antenna design.

    Homebrew Travel Antenna- low cost homebrew two band travel antenna for 20 and 40 meters.

    Homebrewing Coils- Homebrewing antennas, homebrewing your own Coils ny K0BG

    Homemade 20 metre band Loft Dipole- An homebrewed dipole antenna for 14MHz

    Homemade screwdriver antenna- Pictures and schematic to homebrew a screwdriver antenna by PH0RMH in Dutch

    How to build your own Magnetic Loop- An easy guide to "How to build your own magnetic loop" for 20 meters

    How to Work 6 Meter DX by W3EP- December 1998 QST World Above 50MHz copyright ARRL

    H-Pole Multiband Antenna- The H-Pole is a vertical multiband wire antenna for 80-10 m

    HSMM Experiments on the 6M Amateur Band- Progress Report on VHF OFDM Modem submitted by John B. Stephensen

    HSMM on 50 MHz- HSMM Experiments on the 6M Amateur Band

    HT Extension Antenna - The Tiger Tail 

    Hy Gain pop- HF UHF/VHFAntennas, dipoles, accessories and rotators

    Hy Power Antenna Company- Full size or shortened dipoles, Single band or Multi band, Half Square Antennas

    I4SBX EH Antennas- Three eh antenna plans for 20 40 meters bands.

    IK1ZYW Vertical antenna- A vertical antenna for stationary-mobile HF-VHF operation. It works on 2-6-10 and 12 meters band.

    IK4DCS 80-160 mt Sloper antennas- My Sloopers antennas for 80 and 160 meters

    IK-STIC -- multi-band vertical dipole antenna used for quick set-up and quick band change -- From W2IK

    Indoor antenna de F6CYV- Indoor wire antenna project for 7 Mhz band

    Indoor antenna de F6CYV pop- Indoor wire antenna project for 7 Mhz band

    Inductor operation- Understanding current in loading coils

    Inexpensive 17-Meter Vertical- A low cost, low profile DX antenna fro 17 Meters

    Installing Vertical HF Antenna Radials- A ground radial system for the Hustler 5BTV antenna

    International Antenna Corporation- Double bazooka antennas

    International Technology Antennas- Yagi monobanders, multibanders, dipole, verticals, balun, MTFT.

    Inverted L Antennas By Arnie Coro(CO2KK) 

    Inverted U antenna for 160m- An inverted U wire antenna for 200 meters and down

    Inverted V antenna- A french document about Inverted V dipole antennas

    Inverted V- Described is a simple inverted-V antenna which, when used with a balanced ATU

    Inverted V Dipole for 10 15 20 meters- Inverted V Trapped dipole antenna for 14MHz, 21MHz and 28MHz ham radio bands.

    Inverted Vee Antenna -- From The N4UJW Antenna Design Lab

    Inverted Vee Antenna Design -- Nice Illustrations - From K7MEM

    Inverted Vee calculator- Online calculator for dipole and inverted vee antennas

    Inverted Vee monoband antenna- This project will enable you to build a monoband long wire inverted vee with 3/4 wave

    Jetstream- Antennas, base mobile scanner and vhf antenna, coax cables, coax switch, Lightning Arrestor, mounts, power supply

    J-Pole Antennas for 2 Meters- This paper describes two types of 2 meter J-Pole antennas

    J-Pole for 14MHz- 20 meter wire j-pole for 14.2 MHz, a vertical, end-fed half wave antenna by N1LO

    J-Poles -- From The ARRL

    J-Poles Antennas -- Dimensions, matching, everything -- from Bux CommCo -- Be sure to read importance of a decoupling loop. 

    J-verical for 10 meters- J-verical antennas for 10 meter band with photos and plans

    J-Vertical for 10 meters- A Slim Jim for 10 meters band

    K0RWU Multiband dipole 6-17 meters- This antenna consists of 4 resonate dipoles made from 12 insulated copper electrical wire.

    K0WA 40 meter verticle- The antenna is comprised of three lengths of 12 foot aluminum which telescope together.

    K2YWE's Compact 160m Lazy-U Antenna- This compact 160m antenna is a half-wave dipole with a vertical section.

    K3DAV Bazooka Antenna- A double bazooka antenna plan, an alternative antenna design made of coax cable

    K3KY's Short Beverage- Originally planned as an 80/160 Beverage, this antenna is a terrific performer on 40 and 30 meters

    K3QK's Legal Resources -- For hams can use it for that "tower project"

    K4TR Antennas- K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas

    K4TX Delta Loop for 40 Meters- 40 Meter 2 Element Parasitic Delta Loop

    K5OE Antennas -- HF Antennas - 10/15/20 m Dipoles

    K6STI Receiving Loop

    K7HC Mega HexBeam- Pictures taken during the construction of a Hexbeam antenna for 30 and 40 meters

    K7MEM - Folded Dipole Design- Design your own folded dipole antenna

    K7MEM - Inverted V Antenna Design- Inverted V antennas is a dipole

    K7MEM Center-Fed Half-Wave Dipole ( 3-30 MHz)- A Center-Fed Half-Wave Dipole is probably the simplest of antennas

    K9FV 40 meters band loop- A Mississippi Style 40 meter magnetic loop made from available aluminum conduit

    KB1DIG's 2 Meter Antenna Design Gallery- Home-brew antenna designs for VHF. 2-meter colinears, 2-meter Halo, and 6-meter Halo

    KB1DIG's 2 Meter Antenna Design Gallery pop- Home-brew antenna designs for VHF.

    KD6WD Moxon Antenna Project- KD6WD introduce moxon rectangles

    KE4UYP Linear loaded vertical antenna- This is a vertically and horizontally polarized antenna

    KE4UYP RSBVE (Reduced Size Broad Elevation Verticals) For 80M

    KE4UYP Top-Fed 1/4 Wave Linear Loaded Vertical For 160M

    KE4UYP Top-Fed 1/4 Wave Linear Loaded Vertical For 80M

    KG4JJH Moxon Antennas- A Moxon rectangle antenna projects for the 6 10 15 17 and 20 meter band but include drawings, plans...

    KG6ENA L7 HamLoop- A Quad Loop antenna for 17 meter band

    Kites For Antenna Lifting - From G6LFT / M0CUQ

    Kites For Lifting Antennas From The Hawaii Ham Radio Information Pages

    KK5BL How To Build A G5RV Antenna- How to build a G5RV Transmitting antenna

    KN5L Field Day Vertical Antenna- This Field Day Vertical Antenna project is the result of many years of attending various field...

    KQ6XA -- HF Antenna for the Micro-Light Backpacking Enthusiast

    KQ6XA Antennas and towers- Interesting antennas pojects such as Broadband/Multiband Dipole

    LA6NCA Loop antenna- Car mount magnetic loop antenna plans from 3.5 MHz to 7.5 MHz, LA6NCA, Larvik, Norway

    LA6PB's split dipole- A new method of feeding a dipole with toroids.

    Ladder-Line Back Pack Special -- From W2IK

    Lightning Protection -- Four Articles

    Limited space Delta Loop- Here is a simple and easy to build antenna in a Delta Loop 10 and 12 meters

    Linear-Loaded Dipole for 7 MHz- A short but efficient dipole for 40 meters band

    Linear-Loaded Inverted V- How do you fit a full length 160 meter antenna into a 40 foot deep yard?

    Liquid Antennas -- Not April 1 stuff

    Loaded Antennas - From Tom W8JI

    Loaded dipole for 1,8 Mhz- Total Length: 26 m (85 ft.); Total Weight: 380 g;

    Loaded Vertical for 80 Meters- Another version of the DJ8RB loaded vertical antenna

    Loading Coil for 136 kHz- Pictures of loading coils according to OK1FIG

    Log Periodic Antenna Calculator

    Log Periodic Antenna Design- calculates the dimensions and spacings of the elements needed to build a log periodic antenna

    Long Wire Dipole Antenna- An basic horizontal half-wave antenna which can be made of ordinary copper wire.

    Long-wire Aerial for Six Metres By Brian D. Williams, GW0GHF

    Loop antenna for 10m and 15 m- Dual band rectangular loop antenna for 15m and 10m

    Loop Antenna for 6m- Indoor loop antenna for six meters band, project by Colen Harlow, G8BTK

    Loop Antenna Forum -- Yahoo -- Needs subscribing but lots of info here

    Loop antenna resonant frequency calculator- Calculates resonant frequency of a loop antenna

    Loop Antennas -- Plans for each Amateur Band

    Loop Antennas and Calculator

    Loops -- From The ARRL 

    Low Band Antenna -- From K3KY

    Low Band Antennas -- From K3KY

    Low band antennas for 80 and 160m- Antennae for the Low Bands, 80 and 160m

    Low-Cost dipole for QRP- Here’s an economical dipole for simple QRP HF homebrew rigs.

    M3FVB VHF 8db collinear- Build a 2m 8db collinear for portable use

    Mac Antenna Master Software 

    Magic Band Network- 50 MHz information on antennas, beacons, and frequencies provided by PA4PA

    MAGLoop Antenna- Magnetic loop antenna for 10-30 MHZ, 3.5-10 MHZ, description, construction details, homemade.

    Magnetic Longwire Baluns pop- Do these things do exactly what they say they do, or are they total hogwash?

    Magnetic Loop Antenna -- From HB9ABX

    Magnetic Loop Antenna's

    Magnetic Loop Design -- From QRZ

    Magnetic Loops -- By Wolfgang DJ3TZ

    Magnetic Loops for HF -- From W2BRI

    Make your FM Dipole antenna- There is a simple, homemade antenna that can pull-in your favorite station.

    Maps and GPS Info- GPS information and thorough product reviews

    Maratona 50 MHz- A six meter band Marathon managed by ARI Firenze, a 4 month marathon for itailan radio amateurs.

    MARC - The Mast, Antenna, And Rotor Calculator Via Champion Radio

    Marconi Antenna- This article describes the characteristics of the Marconi antenna

    Massive Antenna Page -- From "Your Remote S-Meter" Pages

    Matching Coil Adjustment- There is a specific procedure which must be followed if proper adjustment...

    Maxx Strike Antennas- Full Legal Limit HF Antennas for Amateur Radio and Shortwave Listeners

    MegaHex Beam 30/40 Meter -- From K7HC

    MFJ Enterprises pop- MFJ manufacturer of ham radio antenna products, antenna tuners, antenna analyzers

    MFJ folded dipole review- A portable and easy to use folded dipole antenna, made entirely ith 300 ohm twinlead

    MFJ ScrewDriver Antennas

    MFJ Super Loop Antennas

    Microwave Antennas and Greg's Wireless Networking Info Page

    Mini DeltaAntenna- GM3VLB Mini delta loop antenna

    Mirai Shuha Technologies, LLS- Mirai Shuha Technologies, LLS.

    Mobat Communications- HF-SSB radio products Accessories, Amplifiers and Antennas tuners.

    Mobile 10/80 dipole antenna setup- A mobile setup using a dipole antenna for 10 to 80 meters band in italian

    Mobile Antennas -- From The ARRL

    Mobile Dual Band VHF/UHF Antenna -- Homebrew Project from VE3RGW

    Mobile Helix Antennas for HF- Normal mode helix antennas for HF mobile.

    Mobile HF Antenna By HB9ABX

    Mobile Loading Coil Measurements- 75m Mobile Texas Bugcatcher Loading Coil Measurements

    Monoband Bazooka antenna- ON4MG bazooka antenna plan in french

    Monoband Yagi for 20 meters- A monoband yagi for 14 MHz a PDF article from 73 amateur radio magazine by AB4GX

    Monster Quads- N6LF tells us about his monster two-element 40-meter quad, with bonus three elements on 20 and 15 meters.

    Moonraker pop- Moonraker has been established since 1978.

    Mosley Electronics- Wide variety of multi-frequency Yagis, Verticals, and Dipoles

    Moxon Antenna for 70 Mhz- IK0LZR moxon antenna for 4 meters band in italian

    Moxon Antenna Projects -- 17M and 20M Via KD6WD

    Moxon rectangles for 6 Meters- Moxon antenna for 50 mhz, The Moxon rectangle is a quite broad-band antenna

    Moxon Rectangles- Using moxon rectangles for WARC-Band antennas

    Multiband Antennas -- From The ARRL

    Multiband Cubical Quads- EI7BA Multiband Cubical Quads projects, includes two elements quad antennas for 10 12 15 17 20 meters

    Multiband delta loop by DL2HCB pop- A 10-20 meters coverage delta loop antenna by DL2HCB

    Multiband Dipole Antenna -- From The N4UJW Antenna Design Lab

    Multiband dipole comparison pop- A comparison of different multi-band dipole techniques

    MultiBand Dipole- Different band dipoles can be put together with a single feed, learn how by W8HDU

    Multiband Dipoles- Random Length Multiband Dipoles can be a good solution for field day operations or outdoor activity

    Multiband fan dipole antenna- A three-frequency multi-band dipole

    Multiband HF antenna- A multiband hf antenna for restricted spaces covering 80 40 20 15 meters

    Multiband HF Antenna- This article explores the performance of an unloaded vertical as a multi-band HF antenna.

    MULTIBAND HF DIPOLE PROJECT

    Multiband HF Vertfical Antenna- A vertical antenna that can cover HF bands

    Multiband HF Vertical- A telescopic pole that you adjust to suit the band you're working on , tested on 40 20 and 15 meters

    Multi-Band Mono Delta Loop- Build a Multi-Band Mono Delta Loop for 40, 30, 20 and 15 Meters.

    MultiBand Quad - By EI7BA

    Multi-Band Super Mini Loop Antenna- How to make the Super antenna. Antenna covers all bands 80-10 + 30, 17, 12 meter

    Multiband trap dipole- A multiband 20/40/75/160 trap dipole antenna plan by KG0WX

    Multiband Trap-style Inverted-V Antenna- Trap-style Inverted-V Antenna for 3.5, 7, 14, 21 & 28 MHz

    MultiBand Vee Beam -- Six Band One Element Beam 20 meters thru 6 From LA0HV

    Multiband vertical antenna- An article with pictures on a 80-10 mt vertical antenna with an Unbalanced-Unbalanced balun in italian

    Multiband Vertical Antenna Project- A simple multiband vertical dipole antenna for 20 meters and above

    Multidipole Antenna- This antenna is a group o dipoles, is a multiband and each dipole works on single band.

    My 80 Meter Magnetic Loop- A custom made 80 meter loop antenna. Reports on usage and tips to build the support.

    Mystery Antenna 80M thru 6M - John P Basilotto, W5GI 

    N0LX Antenna Page - Lots of Mobile Antennas

    N3OX Flex Vertical for 40m- N3OX three meters Flex Vertical, a Short, Frequency Agile Vertical for 40 meters

    N3OX Multiband vertical- This vertical antenna consist of a 18 meters telescopic pole and allow operations from 160 to 30 meters

    N4UJW Antenna Design Lab --- Loaded

    Nagara Antennas- Nagara Japanese ham radio antenna manufacturer

    Navstar GPS- GPS signal characteristics, system time, system segments, frequencies

    New HF Antenna From HB9ABX -- construction of small HF antennas to provide the same efficiency as large antennas.

    New HF antenna HB9ABX- A new, revolutionary design allows the construction of small HF antennas

    No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna -- From W5DXP

    NVIS I- Near Vertical Incident Skywave Antennas -- By Patricia Gibbons - WA6UBE

    NVIS II - Near Vertical Incident Skywave Antennas Via WB5UDE

    NVIS III -- For Emergency EmComm folks -- From Bob, W2IK 

    NVIS Roost Emergency Antenna Kit By Bob W2IK

    OE 6m Pages- OE-information, firsts list, 250+ links to 6m pages and resources by OE4WHG

    Off Center Fed Dipole- A K2GXT project documentation of how to homebrew and setup an off-center fed dipole

    OK (CZECH) 6 m Firsts- List of countries that have been worked from the Czech Republic on 50 MHz band since January 1, 1993

    Omni-Directional antenna for 6-Meters- Experimental omni-directional antennas for 6-meters band

    Omni-Gain Vertical Collinear Antenna- This rugged antenna, an omnidirectional collinear

    ON3JT vertical multiband hf antenna- A simple and low cost multiband vertical hf antenna covering 5 bands

    ON7VZ Daniel- VHF, 50 MHz contest, gallery and six meters infos

    One Element Beam 20 Thru 6

    Operating on 6m (50MHz)- Information on 50 MHz operations by G3XBM

    Orginal multiband antenna- A project of a vertical and wires that generate a multiband antenna for 28 14 10 and 7 Mhz in french

    PAC-12 Antenna - mobile multiband- Here’s an award-winning, easy-to-homebrew, multi-band portable vertical antenna

    PAC-12 Vertical portable antenna- Build the PAC-12 Antenna a multi-band portable vertical designed by KA5DVS. 

    PacketRadio Operator's Antenna Handbook -- Antenna Basics, 2M & 6M Antennas

    PAR Electronics Inc.- Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio

    Parabolic Discone by Mike Lake KD8CIK - Highest gain discone antenna ever!

    Parallel multiband dipole antenna- A multiband dipole antenna that works on 40 30 20 and 10 meters band

    Parasitic Delta Loops for 40m- 2 element 40 meter parasitic delta loop antenna by PY4VE

    Pedestrian 5-Band Mobile Antenna - From W3FF

    Petlowany Three-Band Burner Antenna -- Short vertical antenna - Resonant on 20, 15 and 10 meters

    Petlowany Three-Band Burner Antenna- a simple, low-cost, trapless short vertical antenna

    Phased 40M Wire Verticals- Experiments with phased wire vertical antennas on 40 meters at VA7ST

    Phased Arrays- Phased arrays of short vertical antennas, pdf file

    Phased vertical antennas- Phased vertical antenna system in french

    Phasing Arrays - Vertical Antennas -- From Butternut

    Picture of a multiband dipole pop- Pictures of a multiband dipole, build with simple PVC T and standard electrical wire

    PKW Antennas- PKW Antennas for ham radio bands, Quads, delta loops, log periodics antennas for military and professional use

    Portable 2 element yagi for 10-15-20- A Portable 2 element Triband Yagi antenna that can work on 10 15 20 meter band by VE7CA

    Portable All Band Antenna -- A multi-band vertical dipole antenna

    Portable Antennas -- From HFPack

    Portable Antennas -- From The Ham Club At University of Hawaii at Manoa

    Portable dipole for 40 Meters band- Pictures and swr reports for a portable dipole antenna for 40 meters band in german

    Portable dual-band antenna for 20 and 10 meters. - The Flower Pot Antenna from IZØFYL

    Portable Inverted V antenna- This Inverted V Antenna is based on a design by WE5Y

    Portable Loop Antenna pop- This loop it is small and light enough to carry while operating - it can be tuned from 14 MHz to 30 MHz.

    Portable Magnetic Loop Antenna Version 2- A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres. 

    Portable vertical antenna- Vertical transportable HF antenna by CT1BYR

    Portable Yagi for 144MHz- Simple 7 element Yagi is ideal for portable operation.

    Portal de la Banda Magica- Six meters spanish portal by EA3GLJ

    Practical Antenna Notes -- Loaded with ideas -- dB, dBi, and dBd, -- Invisible and Hidden Antennas -- About SWR

    Practical Dipole Antenna- All about dipole antenna construction

    PV4 4 element Yagi antenna- PV4, W2PV 4 element Yagi antenna as described in ARRL antenna handbook 15th edition

    PV6 Yagi antenna- 6 elements yagi beam for 15 meters band, by T73M

    PY1UNU dipole for 80 meters- A dipole with coils for 80 meters band in portuguese.

    PY6CJ 80/40 meters dipole- A center feed trapped dipole for 80 and 40 meter band in spanish

    PY6CJ About Delta Loop antennas- Essential notes on building and dimensioning delta loop antennas for HF and VHF, in spanish

    PY8ELO Dipole project- A spanish page about inverted V dipole construction tips and calculations.

    QEX Ground System Experiments- N6LF series of experiments on ground systems for vertical antennas.

    QM5 Yagi for 2 meters band- The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz

    QRP 80 Metre Slinky Dipole- M0WYM slinky dipole setup into an attic.

    QRP Fan Dipole- Attic dipole antenna that allow to operate QRP from 40 metres to 10 metres

    QRP Inverted V Dipole antenna- An homemade QRP Inverted V dipole antenna for 40 20 17 and 15 meter band

    QRZ Shareware Collection antennas -- over 40 antenna files

    Quad - Multiband - By EI7BA

    Quad antenna for 10 and 15 Meters- Building guide for a two element quad antenna planned for 28 and 21 Megahertz

    Quad Antenna System by Pfeiffer Maltese - Excellent Quad Antenna projects for 40 20 17 12 10 and 6 meters band

    Quad Antennas --- From The ARRL

    Quad calculator- Cubical quad antenna calculator in java script

    Quad calculator updated pop- Cubical quad antenna calculator in java script

    Quad calculator updated pop- Cubical quad antenna calculator in java script

    Quadrafilar Helix Antenna- Quadrafilar Helix antenna for 137 Mhz

    Quads 10-12-15 Meters From IZ7ATH

    Quarter Wave 80 m vertical Antenna- Homebrew a 1/4 wave 80 meter vertical using aluminium tubing by W4NFR

    Quarter wave antenna- A quarter wave antenna with dimensions for uhf and vhf bands

    Quarter wave vertical antenna- About the basics of the quarter wave vertical and ground plane antennas

    Quarter Wave Verticals- One of the most useful antennas in the repertoire is the Marconi or quarter wave grounded vertical antenna.

    Quarter Wave Wire GP antenna- A 1/4 Wave GP antenna for 146-225-445 Mhz

    Quarter Wave with radials- VHF quarter wave antenna mainly for scanner usage

    QuarterWave Antenna installation notes -- includes ground/raised radial info -- From Butternut

    Quick and Simple 2 Meter Ground Plan Project Via Ham Universe

    Quickie Vertical- KQ6RH amateur radio projects, quickie vertical antenna

    Quickie Vertical pop- KQ6RH HF multiband vertical antenna plan

    R7 Vertical Maintenance and Repair- How repair the traps, and then homebrew the rest of the antenna, including the matching box

    Radial ground system for verticals- Maximum-gain radial ground systems for vertical antennas by K3LC

    Radial systems and ground- Radial systems for elevated and ground mounted vertical antennas by SteppIR

    Radials and Ground Systems -- From Butternut 

    Radials and Ground Systems -- From SteppIR

    Radiation And Fields -- From Tom W8JI

    Radioworks- Source for high performance wire antennas, Current-type Baluns, Line Isolators, quality wire antenna parts

    RDF2 two element, close spaced Yagi antenna- is an adaptation of the RDF2 two element

    Real Time Satellite tracking pop- Select your favorite satellite and watch its trajectory on Google Maps in real time!

    Receiving antenna for low bands- K9AY loop antenna installed at PA6Z Contest group.

    Reflected W Beam- Hexagonal Wire Beams for 40-10m from DL7IO

    RF choke or 1:1 balun- RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"

    Rhombic Antennas -- From Ian Cummings

    Rhombic Antennas -- From Integrated publications

    Rhombic Antennas 30M - 6M -- From KC0FVV

    Ribbon Dipole- Ideal antenna for QRP work, as it has more gain over dipole.

    RippleTech Electronics- Wide bandwidth Trapped Verticals and rotary dipoles, baluns, 40m/80m wire dipoles

    RockLoop Antenna- A Compact antenna for 10.1, 14 & 21 Mhz Bands. A multiband portable antenna suitable for QRP operations.

    RockLoop Antenna pop- A Compact antenna for 10.1, 14 & 21 Mhz Bands. A multiband portable antenna suitable for QRP operations.

    Roof Top Tower -- By KB0YKI

    Roofspace Antennas- How to build a roofspace antennas and get them to work.

    Rotary dipole for 12/17 meters- A home brewed rotary dipole antenna for 12 and 17 meters band

    Rotary Dipole For 17 And 20

    Rotary Dipole for 30 and 40 meters band- Drawings pictures and notes on a rotary dipole antenna for 30 and 40 meters band

    Rotatable delta loop- W2UP rotatable low band receiving delta loop

    Rotatable Dipole for 40m-6m- This article describes a simple, inexpensive, dipole antenna

    Rotatable Dipoles- Portable, and shortened with loading coils rotatable dipoles for 6 meters, 20 meters and multibands.

    Rubber Duck Antennas 

    Rybakov 806 Multiband Antenna- Multiband no trap no gap antenna.

    S9 Antennas- Multiband and monoband HF Vertical antennas and rotatable dipoles manufacturer based in Texas USA

    S9V 40M vertical antenna- A fiberglass-wire vertical antenna for 40 m band by WY3A

    Sandpiper Aerial Technology LTD- has been designing and manufacturing aerials for over 25 years.

    Satellite Antennas

    Satellite tracking antenna pop- A rugged motorized satellite antenna tracking system for construction by the home handyman

    Selecting a Multi-Band Vertical- Choosing a vertical antenna. Buying guide to amateur radio HF vertical antennas by Bencher inc

    Self supporting 80M Vertical- A self supporting vertical antenna for 80 meters by W9OY include pictures and construction details

    Semi-vertical trap antenna- The G3NGD Semi-vertical Trap Antenna for 1,8 3,5 and 7MHz

    SGC Smartuners for Stealth Antennas -- Free - Click on "Download your copy today!"

    Shoddytenna: vertical antenna for 160 meters- A quick vertical for 160 meters portable use

    Short 40m dipole- The GM4JMU Shortened 7Mhz Dipole

    Short Dipole for 80 m- This short dipole antenna has been described by Nadisha, 4S7NR

    Short Dipole for 80 Meters- May be of interest to anyone wishing to get on 80M (3.5MHz) that have limited space available.

    Shortened 3D Corner Reflector Antenna - For 2.4 GHz - From Dragoslav Dobri YU1AW 

    Shortened Center-Fed Half-Wave Dipole- Design your owm HF shiortened dipole

    Shortened dipole for 10 & 40m bands- with overall length of about 11 m. For this antenna traps are substituted by inductors...

    Shortened dipole for 160 meters- A short dipole for 160 meter band by XE3RN, includes also a receive only loop antenna in spanish

    Shortened Dipole for 40 Meter- A shortened dipole antenna for 40 meter band

    Shortened dipole for 80-40 meters- A shortened dipole for 80 and 40 meters band in spansih

    Shortened multiband dipole- A shortened multiband dipole antenna by PA0FRI in Dutch

    Shortened vertical antenna for 7 Mhz- A simple drawing of a shortened antenna for 40 meters by using a PVC tube

    Shorty Forty Antenna- Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.

    ShortyForty Dipole -- By W5VM Via K7MEM

    ShortyForty Dipole -- From FlashWebHost

    Shunt feed a hustler mobile HF Antenna- 40 and 20 meters mobile antenna

    Simple 160m vertical antenna- A Simple vertical antenna project for the 160 meters band by Peter G8CVF

    Simple Antennas for 10 Meters- Some antenna ideas for 10 meters band

    Simple FM Dipole Antenna- FM Dipole for 88-108 MHz

    Simple HF multiband vertical - A multiband quarter wave vertical antenna that works on 5 bands.

    Simple j-pole antenna for 2 meter pop- how to build a J-pole antenna for 2 meter band with many photos ecc.

    Simple Z Match Tuner - Via Lloyd Butler VK5BR

    Six Italia- Six meters radio club, promote and preserve 50 mhz operations in italy

    Six Meter Antenna Potpurri By Brian D. Williams, GW0GHF

    Six Meter Antennas A Bunch -- From The UKSMG News

    Six meter Band Plan IARU Reg 1- 50 MHz IARU Region 1 bandplan

    Six Meter Halo -- From W3DHJ

    Six Meter Hex Beam -- three elements with a turning radius of 54 inches

    Six Meter International Radio Klub- SMIRK club news, DX information, content details, and forum for 6 meter operation enthusiasts.

    Six Meter J-Pole -- By K4ABT

    Six Meter Long Wire Antenna - From GW0GHF

    Six Meter Moxon Antenna- N2MH description and phots of a moxon antenna for 6 meters band

    Six Meter Sloop By K0FF

    Six Meter three-element Yagi -- From The ARRL

    Six Meter Tri-Yagi -- From The ARRL

    Six Meter Yagi -- From The ARRL 

    Six Meters Beacons Calculator- The six meter beacons calculator for distance and azimuth by OE1SMC

    Six Meters FAQ- Faqs on six meters band, designed to help encourage hams to use and enjoy this band

    Six Meters: An Introduction- An extensive introduction to 50 mhz band, (6 meters)By Dave Finley N1IRZ

    Six Metre Antenna -- By Maurius - ZR6YY

    Six Metre Indoor Loop -- By Colen Harlow, G8BTK 

    Six Metre Portable Dipole For QRP - From M0WYM

    SIXily News- Six meter band portal with lots of dx informations and operating aids by IW9CER

    Skywire Loop -- From Matthew G0VBC

    Skywire Loop Antenna -- From The ARRL

    SlimJim 2M Antenna

    Slim-Jim 2m Antenna- Drawing and assembling instruciton for Slim-Jim 2m Antenna

    Slingshot method for hanging SkyWires

    Slinky Antenna for $10 -- From KG6IIR

    Slinky Antennas -- From Antennas and More

    Sloper Antennas -- From The ARRL

    Small 70cm Yagi -- From The ARRL

    Small loop antenna for 15 and 20 meters- A Small Transmitting Loop Antenna for 14MHz and 21MHz.

    Small vertical arrays- a guide to help install arrays

    Some plain facts about multiband vertical antennas

    Spi-Ro Manufacturing Inc- Transmitting & receiving multi-band antennas covering 1.8 thru 55 Mhz.

    Squid poles as portable multiband antennas- Fancy a cheap, collapsible self-contained portable antenna for 80, 40, 30, 20 and 15m

    St Louis Vertical -- From The American QRP Club

    St. louis vertical updates- The St. Louis Vertical Revisited by Dave Gauding, NF0R

    Stacked Yagi Antennas- Constructing and designing full size, single band stacked yagi antenna arrays

    Stacking broadside collinear- One popular rumor or thought is that antenna gai

    Stacking Yagi Antennas -- From the ARRL

    Stacking Yagis - From Astron Wireless

    Stacking Yagis -- From Grantronics

    Stacking Yagis -- From The ARRL

    Stacking Yagis -- Same band and different bands -- From G3SEK

    Stealth Amateur Radio - Book From The ARRL -- (ISBN: 0-87259-757-1) #7571

    Stealth Antenna Experiences - From Clif's ham radio connection.

    Stealth Antennas

    Stealth Multiband Vertical- A vertical antenna for 40 and 80 meters band, using a telescoping fiberglass fishing pole.

    Sterba Curtain 40M -- from KB8PGW 

    Sturba Curtain - All Band

    Succesfull 6m EME DX pedition- Pictures and story of a successfull dx pedition in 6 meters EME operation

    Super J-Pole Antenna (Collinear Design) - By KB0YKI

    Super J-Pole Antenna (Collinear Design) - By KB0YKI 

    Super Loop Antenna pop- Superloop III designed by Jim, W4FTU

    Swiss Quad for 10 and 6 meters- Based on HB9CV, F6ITV decribes how build a swiss quand antenna for 28 and 50 Mhz.

    Switchable Antenna 80/160 meters band- A switchable antenna for 80/160 meters by IK1ZOY.

    T2FD Antenna

    T2FD, The Forgotten Antenna- The terminated. tilted, folded dipole T2FD is a little known antenna that performs excellently.

    Tecadi- Mast systems and antenna accessories, hamrope(R) guy lines by Jurgen Simon DH5AB

    TET-Emtron- Australian antenna manufacturer specialise in supplying amateurs with the best quality products.

    Texas BugCatcher - GLA Antennas

    Texas Twister - GLA Antennas

    The 15 meters half sloper updated- Article on an easy to build antenna for the 15-meter amateur band

    The 160M No-Excuses Homebrew Vertical- 160m antenna

    The 2-Element-HB9CV-Beam- The HB9CV-Beam is a 2-Element-Yagi with two driven elements

    The 2x2 quad for 12 and 17m- Quad Antenna for 18 MHz and 24 MHz

    The 40 meter Stealth Vertical updated pop- Vertical antenna for 40 meters band

    The 40 meter Stealth Vertical updated pop- Vertical antenna for 40 meters band

    The 40 meter Stealth Vertical- Vertical antenna for 40 meters band

    The 40M Extended Double Zepp new- A 5/8 wave antenna, can be fed with ladder line from the center insulator to tuner.

    The 4X4 Slimtenna- Development of the Slim Jim antenna for HF

    The 50-MHz- DK7ZB- Quadlong- Gain 6,4 dBd, F/B 21 dB also available in 70Mhz version

    The 7-Hex Driven Vertical Array- The array consists of 7 vertical antennas arranged as 6 verticals

    The 80-40-20-10 meter fan-dipole project- Homebrew a 4 bands parallel fan dipole covering 80,40,20 and 10 meter by VE2XIP

    The 80M elevated wire vertical array- This 80M antenna is a pair of raised 1/4-wave verticals

    The 9:1 balun pop- Antenna special on hard-core-dx.com

    The All Copper X-Beam for 17 Meters- WA2UGT X-beam antenna for 17 meters band

    The Antenna Elmer By AC3L & N3LSS

    The Antron 99 exposed! pop- Have you ever wondered what was inside the Antron 99 antenna?

    The Battle Creek 40 80 160 m antenna- 3 Band vertical Marconi-antenna for the bands 40, 80, 160 meters

    The Bazooka Antenna- Notes on bazooka antennas by Katunk: a portable field antenna, sometimes called the double bazooka

    The Bazooka antenna- The Bazooka-antenna was developed by the staff of M.I.T. for radar use.

    The Bazooka vertical pop- This is a deviation from the wonderful antenna the Double Bazooka.

    The Broadband Double-Bazooka- The Broadband Double-Bazooka Antenna — How Broad Is It? 18-1.

    The Cobra antenna- This article explores the Cobra Junior linear loaded antenna for 80m to 10m bands.

    The Copper cactus antenna pop- Copper Cactus multiband J-Pole antenna

    The Copper Duckie Antenna- A super easy VHF antenna for apartment dwellers

    The Cycloid Collinear, a CP Omni- This paper describes a wide band, high gain, multi-element cp omni with a single 50 ohm

    The Delta Loop- An informative page about delta loop antennas

    The Doble L antenna for 160 and 80 m- The antenna has the form of a C, it is fed in the centre of the vertical section

    The Double Bazooka Antenna - A Review- Here is a review of the 40 and 80 meter band Double Bazooka antennas

    The Double Bazooka Antenna- The Double Bazooka Dipole is a very efficient single band antenna which is very quite

    The DxZone has nearly 600 Antenna Articles

    The Effects of VSWR on Transmitted Power --By James G. Lee, W6VAT

    The extended double zepp- This wire antenna exhibits extraordinarily high gain in a bi directional radiation pattern.

    The FD4 (FD3) Windom Antenna pop- The 4-band Fritzel model FD4 is a special version of a Windom antenna.

    The Fence Fan Dipole- The Fence Fan Dipole a quick, easy and inexpensive multiband dipole antenna

    The flower pot antenna- A portable dual-band antenna working principally on 10 meters but also close to the 30 meter band.

    The Galaxy dipole- A very short dipole with a good radiation efficiently plus a respectable bandwidth by S. C. Chuck Smith, WA7RAI

    The german 6m homepage- One of just a few webpages for the magic band, see it from the german point of view.

    The Global Positioning System- The Global Positioning System

    The GM3VLB 5 Band mini delta beam- HF multiband mini delta compact  20 to 10 meters by GM3VLB

    The ground image vertical antenna- A 20 meter quarter wave vertical antenna by jerry sevick W2FMI QST Article

    The Hairpin Monopole Antenna- Numerous questions have been raised concerning its performance

    The HB9CV antenna- Basics and principles of the HB9CV antenna by Rudolf Baumgartner.

    The HO Collinear, a Horizontal Omni- The HO Collinear is a 4 element horizontally polarized omni for two meters

    The Hudson antenna- A vertical antenna for 80 and 40 meters project with lots of assembling pictures

    The Joystick Antenna- The Joystick antenna was used many years ago as an all band vertical HF antenna

    The L7 HamLoop antenna for 17 meters- K6SGH introduce the hamloop antenna L7 series

    The Lattin 5 Band antenna- The antenna was named for W4JRW

    The Lazy-H vertical antenna- A versatile antenna for dx work

    The Little Stick Antenna pop- The Little Stick antenna is an aluminium version of the Vertical Bazooka

    The Monoband HF dipole antenna- If you are looking for an easy antenna for your favorite band

    The Multi-Band Fan Dipole- How to build a multi-band dipole antenna with a single coax feed. Instructions for a 160M antenna

    The N3UJJ Antenna Project- The N3UJJ antenna project,parallel-cage dipole a multi-band horizontal antenna

    The Neumann-Antenne- A stacked multiband dipole array for 10, 15 and 20 meters

    The PA2S 50 MHz Tape Archives- The PA2S Tape Archives. Many RealAudio sound clips of 50 MHz DX contacts

    The Short Dipole Using Coils- A very popular method of making a short dipoles resonate at a given frequency.

    The Simple Collinear- Wherever there is a need for a vertically polarized omni-directional antenna with gain, a collinear is used.

    The Simplest Collinear -- From Ross W1HBQ

    The Sloping Vertical Dipole- The radiating part is the vertical half of the dipole.

    The St Louis Vertical- By Dave Gauding, NF0R

    The Ugly Balun- A 1:1 choke balun for 160 thru 10 meters using one continuos lenght of coax to rig.

    The W4INF Multiband Vertical- HF antenna for any band you desire, you build yourself. Is a basig ground plane antenna

    The Western HF-10 multiband dipole antenna- A 67 feet long dipole doublet antenna

    The YU7EF 6m and 4m antenna- Realization of the YU7EF 6m(6elm) and 4m(7elm) duo band antenna on a 6m boom by OZ1DJJ

    The YU7EF Duo Band Antenna- The original project of a dual band yagi antenna for 50 and 70 mhz

    This Old Dipole- An antenna construction workshop conducted at Marshall N1FN's QTH

    Three bands whip antenna- 21 28 and 50MHz three bands whip antenna by JA1HWO

    T-Hunting Antennas- 4 Element Cubical Quad, Yagis, LZA Circular Quad, Shrunken Quad , quarter wave, J-Pole, beam mounting

    Tiger Tail HT Extension Antenna

    Titanex- Low weight Titanium Verticals, Log-Periodics, Yagi antennas, Quads, towers and antenna accessories by Titanex

    TLV40m antenna- Top Loaded vertical antenna for 40m Band with elevated radials

    Top Loaded Portable Vertical- A 3.5 Mhz top loaded vertical antenna built using 2 elevated radials by DJ9RB

    Top Loaded vertical antennas- Simulation of a top loaded vertical antenna for 1.2 MHz

    Top loaded vertical- Vertical Antenna for 40m Band with elevated Radials Top Load is a Mesh 2 x 1 meter (Netz 2x1m)

    Tower and Antenna Installers

    Towers & accessories

    Tower Installation -- Photos From W5AJ

    Tower Installation -- See how KO4BB did it

    Tower Talk Archives -- Lots of advice from a reflector

    Tower/Antenna Raising -- From Dr. Dave

    Transmission Line Calculator -- From AA3RL

    Transmission lines, coax, swr, waveguides -- loaded with info. From AllAboutCircuits

    Trap Dipole for 17 and 20- M0XDX trap dipole for 17 and 20 metres made from two fibreglass telescopic 5 metre long fishing poles.

    Trap dipole for WARC bands- Diamond W8010 Multiband Dipole Modifications

    Trapped Antennas -- From The ARRL

    Trapped dipole for 40 80m- I0SJC trapped dipole for 40 and 80 meters

    Trapped dipole for 40-80-160 meters- Build a space efficient trapped dipole antenna for 40-80-160 meter bands

    Trapped dipole for 80 40 20- A multiband trapped dipole for 80, 40 and 20 meters band by ZL1BJQ

    Traps -- Excellent From Tom W8JI

    Traps From VE3GK

    Tuner Design for Half-Wave Vertical & Similar-Length End-Fed Antennas From R.J.Edwards G4FGQ ©

    Tuner, Antenna - How to use. Also shows basic station interconnections - From Hamuniverse.com 

    Tuning Hustler 5BTV- Fine tuning your Multiband Hustler Vertical

    Turnstile Antennas -- From Integrated publications

    Twin Lead Dipole- A folded dipole using twin lead By W8HDU

    Two Element Beam I for 10-, 15-, or 20-meters -- From The ARRL

    Two Element Beam II for 10-, 15-, or 20-meters -- From The ARRL

    Two Element Phased Verticals - Two 40 meter phased vertical antennas, project, pictures and description by W4NFR

    Two portable 6 meters antennas - two-element quad and a three-element yagi with telescoping elements -- From VE7CA

    Two wire broadband HF dipole- This article describes the design and simulation of a two wire broadband dipole antenna

    UA1DZ antenna - description and chart- HF 4 bands (7-14-21-28) vertical antenna plan

    UHF Quad antenna- UHF cubic antenna with a 16db gain

    UK Six Metre Group- UKSMG news, message board, and articles dedicated to encouraging amateur radio on 50MHz

    UKSMG sporadic-E competition- THE Six Metre event of the year The contest is open to all users of 50MHz

    Ultimate Portable HF Vertical Antenna- A light and compact antenna that is easy to build, and easy to find parts for.

    Unloaded vertical as a multi-band HF antenna- Performance of an unloaded ground mounted vertical as a multi-band HF antenna.

    USCG Navigation Center DGPS- Differential Global Positioning Service (DGPS) is a land-based augmentation system

    Using the half-square antenna for low bands- Can’t put up a really high horizontal antenna for 80-meter DXing?

    VE3GK's Homebrew Site -- 7Element 20M Yagi 63ft Boom

    VE3GK's Homebrew Site -- 80M Rotating 2 element Quad

    Ventanna HFP-2 10 Foot HF Antenna -- 6.5 to 30 MHz !!!

    Ventennas -- The Forbes Group

    Verkürzte Antennen -- Short Dipoles and Verticals for 160m & 80m -- From DJ9RB

    Vern Wright's HF Mobile Antennas, MP1

    Vertical Antenna Design -- Trap and Loading Coil Losses With Vertical Antennas By W0DN 

    Vertical Antenna for 15 Meters- Building a vertical antenna for 15 meters band

    Vertical antenna for 160 meter- This high antenna require a large ground composed by 40 radials. It's not very handy expecially in windy situations but is very powerfull in pile-ups. In italian

    Vertical antenna for 2 mt and 70cm- How to Build a Dual-Band Antenna for 2M/70cm

    Vertical antenna for 20-15-10 m- This is a vertical multiband antenna made up of several aerial elements lambda/4 length

    Vertical Antenna Loading Coils -- see LOADCOIL * Design short vertical antenna and loading coil. From Reg, G4FGQ

    Vertical Antenna Phasing Arrays - From Butternut Antennas

    Vertical Antennas - Dirty Little Secrets, Ground/Radial Systems - Click On Tech Notes

    Vertical Antennas - Dirty Little Secrets, Ground/Radial Systems, Phased Arrays of Short

    Vertical Antennas & Ground Screens -- By N6RK

    Vertical Antennas, Why Radials?- A MUST READ - From Butternut antennas Click On Tech Notes

    Vertical Dipole 10-40m- A multiband vertical dipole antenna by ON4BAI

    Vertical Dipole Antennas- VDA, HF vertical dipole antennas article by F4BKV

    Vertical half-wave aerials for 4m- Practical designs pictures and alternative design of antennas for 70 Mhz by Ross Wilkinson G0WJR

    Vertical moxon for 14 Mhz- A vertical Moxon with different feeding for the 20 meters by SM0DTK

    Vertical Wide Band 7-21 MHz -- The RXO Unitenna -- from G3RXO

    VHF Antennas - Various -- From The ARRL

    VHF Collinear-Dipole- 2 m. Band VHF Collinear with 2 Dipoles by sv1bsx

    VHF EggBeater Antenna - From ON6WG / F5VIF

    VHF Yagi for 6 m 4 m and 2 m- Triband DK7ZB VHF Yagi antenna for 6 m, 4 m and 2 m with a single feedpoint

    VHF/UHF Antennas -- By KB0YKI -- J-Poles, Super J-Pole, Omnidirectional, Quads, Yagis

    VHF/UHF Long Yagi Workshop pop- Yagi plans and notes for 6m, 2m, 70cm and 23cm

    VHF/UHF Wideband Portable Dipole- A portable dualband dipole robust and compact antenna

    VHF/UHF Yagi Antenna Design- Design your vhf yagi antenna online

    VK5AH -HF 4 Bander dipole- 80 - 40 - 20 - 15 meters dipole antenna

    VK5BR 20-40 Metre EH Antennas- How to construct a very small but efficient Antenna

    Vortex Antenna Systems- Vortex Antenna Systems, radio communication antenna

    W2IK Quick Stik Emergency Field Antenna For VHF/UHF -- stored in a PVC sewer tube (which also acts as it's lower base) 

    W3DZZ multiband dipole- The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz.

    W3FF Antennas Buddipole- The Buddipole is a hi-tech, take-apart dipole designed for HF portable operations

    W3FF Portable Dipole- This is the antenna w3ff designed for his walking portable station.

    W5DXP's No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna

    W5GI Mystery Antenna Kit -- Kit is at the bottom of the FAQ page, or homebrew info on main page

    W5QJR Antenna Via Antennex

    W5VMs Shorty 40 Antenna- A shortened dipole for 40 meters band by Martin E. Meserve

    W6ZO Delta Loop- W6ZO Portable Delta Loop for 20 meters

    W7FG Ladder Line- True Ladder line and Wire antennas

    W7IUV 160 Meters vertical- 90 foot tall top loaded vertical for 160 meters

    W8JI Antenna Articles -- Receiving * Crossfire Phasing * Transmitting * Combiner and Splitters * Toroid Balun Winding

    W9INN dipole antenna- MPD-5C-78 multiband dipole antenna, developed by W9INN (SK)

    WARC 3 band dipole- A dipole antenna for 12 17 and 30 meters band

    WaveGuide Tin Can Antennas -- From Gregory Rehm

    WB0NNI 40 Meter Linear Loaded Vertical

    WB4BXW Diople Antenna Calculator- Dipole and inverted vee antenna calculator sufficiently accurate for wire antennas up to 30 Mhz

    Wind your own RF Choke- Learn How - Winding your own RF Choke, Inductor Winding instructions

    Winding style of toroid chokes and baluns- Dispels myth about choke balun winding method

    Windom - 6 Bands - From K3MT and daughter KF4LGR

    Wire Antenna for 75 and 80 Meters -- From Ross W1HBQ

    Wire Antenna Life- How long should a wire antenna last? Wire antennas are not forever.

    Wire antenna pop- The $4 Special all band wire antenna

    Wire antenna with coaxial cable traps- This multiband antenna 10-80 meters is a home made project by I1BAY.

    Wire delta-loop antenna- Description of a delta loop antenna for HF bands in french

    Wire Dipole for 7.05 MHz- Inverted Vee antenna for 40m with simulation data by DF9CY

    Wire Yagis -- from VE7CA

    Wireman-J-Poles for 2m-40m- J-Poles with Wireman-cables for the quarterwave matching section

    Wonder-Whip AutoTransformer Antenna - 3.5 To 432 MHz !!!! From John M1IOS

    Yagi -- OWA -- Optimized Wideband Antenna -- Follow On Page By NW3Z

    Yagi antenna for 17 meters band- A 3 element yagi antenna for 17 meters

    Yagi Designs - Lots and Lots -- From TEARA - Click on Knowledge Quest, then topic.

    Yagi Optimized Wideband Antennas By NW3Z 

    Yagi/Beams -- From The ARRL

    Yagi-Uda antennas- A Yagi-Uda antenna is familiar as the commonest kind of terrestrial TV antenna

    YLRADIO - Full wave delta loop- This Delta Loop is a three-sided antenna suspended high in the air by vertical supports

    YU7EF Pop 6 & 7 Elements antenna- YU7EF Pop 6 elm for 50Mhz and 7elm for 70Mhz, a 4+6m douband with 12mm Alu tubing

    ZeroFive Antennas- Vertical antennas for all HF bands, expecially 80 40 20 meters bands

    ZL Special -- From The ARRL -- Click On Other HF Antennas 

    ZL3RG 30 Meter Quad- antenna for 10 MHz (30 meter band) by Rob ZL3RG based on the original concept of EI7BA.

    ZZ Wave Net- ZZ Wave Net is a 40 & 80 meter full wave loop designed to fit on a city lot.