YO3DAC - VA3IUL    

Iulian Rosu

RF Technical Articles

"To invent, you need a good imagination and a pile of junk" - Thomas Alva Edison (1847-1931)

RF BASICS and THEORY   "Very little is new in RF anymore. Almost everything that we see today is a variation on a very old and well understood theme"-- C. Marki      - Phased Array Antennas    - Understanding Noise Figure    - LNA Design    - RF Power Amplifiers    - Phase Noise in Oscillators     - RF Mixers    - Frequency Multipliers    - Phase Shifters    - RF Switches    - Microstrip, Stripline, CPW and SIW Design    - High Frequency VCO Design and Schematics    - Impedance Matching    - Automatic Gain Control (AGC) in Receivers    - Bias Circuits for RF Devices    - Smith Chart Theory    - How to measure the impedance of a strip line    - RF System Formulas    - High Impedance Matching with a Network Analyzer    - How to Characterize Surface-Mount RF Devices    - RF / Microwave PCB Design and Layout    - Impedance Matching Networks    - Inductance, Capacitance, and Impedance Bridges    - Microwave Diodes...Schottky vs. Point-contact    - How To Achieve Perfect PCB Soldering    - Guide to RF Coaxial Connectors and Cables	HOMEBREW Transceivers and RF Circuits       - Dual - Band Transceiver for 1.3GHz and 2.3GHz     - High Performance HF Transceiver     - 144MHz Band - All Mode Transceiver      - 30m Band - All BJT Transceiver     - 50MHz SSB/CW Transceiver     - Very Low Phase Noise Vackar VFO     - "Dual-Watch" 20m SSB Transceiver     - High Stability, Low Noise, Push-Push VFO     - Low Noise Floor SSB Transceiver for 80m to 15m     - 1496 Hardware Defined Radio -                           Compact SSB/CW Transceiver for 20m     - Receiver Noise Canceller     - FT8-SSB-CW Low-Cost Transceiver for 17m band     - S-Band 2.4GHz FMCW Radar     - C-Band 5.6GHz FMCW Radar       - SiGe Push-Push VCO for Low-Power C-Band FMCW High Resolution Radar Applications           - Homebrew RF Circuit Design Ideas ...more than you can think...                                                                                   ...now 6108 design ideas...
HOMEBREW RF TEST CIRCUITS         - 100MHz Spectrum Analyzer     - Inductance meter with 1nH resolution     - RF Power Meter    - HF Antenna Analyzer (3MHz to 30MHz)    - 2.4GHz ISM Spectrum Analyzer Monitor    - Wobbulator for Filter Characterization	MICROWAVE CIRCUITS       - Multiband low power beacon for:             144MHz, 432MHz, 1296MHz, 2305MHz     - High Frequency LNA Schematics     - High Frequency VCO Design and Schematics
RF SOFTWARE and UTILITIES (Freeware)       - RFSim99 - Free RF Design Software     - AppCAD - Free RF Design Tool     - WinSmith - Smith Chart software (for Windows 32b)     - TX-line - Transmission Line Calculator AWR     - 4nec2 - Free 2D and 3D Antenna Software     - Qucs Studio - Free RF Circuit Simulator     - LTspice - Free Spice Simulator     - Sonnet Lite - Free EM Software     - Feko Lite - Free EM Software     - Ansoft Designer SV - Free RF Circuit Simulator     - Ansys Electronics Desktop Student - Free EM Simulator     - CST Student Edition - Free EM Simulator     - AADE - Free Filter Design Software     - TonneSoftware - Free RF Software's     - SMWLink - Free MW Link and Satellite Software     - ADIsimPLL - Free PLL Simulation Software     - ADIsimRF - Free RF System Design Tools     - ADI - ADC Frequency Planning Utility     - FilterLab - Free Active Filter Design Software     - CircuitMaker - Free Spice Simulator     - Micro-Cap - Free Circuit Simulator     - MPLAB-Mindi - Free Analog Simulator     - SimSmith - Smith Chart Tool     - Smith v4.1 - Smith Chart and S-Parameter Tool     - RF & Microwave - Graphical Design Tools     - Amanogawa - Interactive RF Java Applets     - DL5SWB - Toroid Ring Core Calculator     - Toroids.info - Online Toroid Calculator     - Saturn - Free PCB Design Toolkit     - Dishal - Free Crystal Ladder Filter Software     - Afar Communications - RF Link Budget Calculator     - Murata - Online RF Components Characteristics     - Johanson - RF Components Modeling Program     - Afreet Software Inc. - Free Ham Radio Software     - Coil32 - Online Inductor Calculators     - MultiSIM Education - Free Spice Simulator     - RF Wireless World - RF Converters and Calculators     - Pasternack - RF Calculators and Conversions     - Planar Spiral Coil Inductor Calculator     - Online LC Filter Design - WA4DSY     - Online RF Calculators - VK2ZAY     - Impedance Calculators - Mantaro     - Qorvo - RF Design Calculators and Tools     - SIMetrix/SIMPLIS - Free Circuit Simulator     - NgSpice - Free Mixed Mode Simulator     - All About Circuits - RF Tools and Calculators     - PCB Calculator - Impedance, Crosstalk, Current     - Coaxial Cable and Matched Loss Calculator     - Online Calculators for DIY Coil Winding     - Micro-Cap - Free Spice and Schematic Software     - OwenDuffy - Online RF Calculators     - Single Layer Aircore Inductor Calculator     - Planar Spiral Coil Inductor Design Calculator - Apogeeweb     - Online Circuit and System Calculators - Apogeeweb     - SAF - GPS Distance, Elevation, and Fresnel Zone Calculator     - Microstrip & Stripline Crosstalk Calculator - EEWeb     - Opticoil - Helical Inductor Design Tool - PA2EVR     - RF Tools - Le Leivre     - Antenna Array Factor Calculator - easyRF     - Rogers Corporation Calculators     - LC Filter Designer Software - Coilcraft     - RF Design Tools - Hokua RF     - mini Ring-Core-Calculator - DG0KW	ANTENNA and PROPAGATION          - PIFA - Planar Inverted F Antenna     - Wire Antennas for Ham Radio ...now 436 antennas...     - Small Antennas for High Frequencies     - Antenna Types and Antenna Patterns     - Basics of Radio Wave Propagation     - Live Propagation and Solar Data       - Design Ideas for Printed and Microstrip Antennas     PCB / Layout SOFTWARE       - Express PCB  - Free PCB Design Software     - PCB123  - Free PCB Design Software     - FreePCB - Free PCB Design Software     - Eagle Light - Free PCB Design Software     - KiCad - Free Schematic and PCB Software     - PCB Artist - Free PCB Layout Software     - TinyCAD - Free Schematic Capture and PCB Export     - DesignSpark - Free Schematic & PCB Design Software     - DipTrace Light - Free Schematic and PCB Software     - PCB Creator - Free PCB and Schematic Capture Software     - CADSTAR Express - Free PCB Design Software     - LibrePCB - Free Schematic and PCB Design Software   Online Circuit Design and Simulation Programs       - Circuit Diagram - Free Design and Share Circuits        - CircuitLab - Online Design and Share Circuits     - DigiKey Scheme-it - Online Design and Share Circuits     - CircuitMaker - Online PCB Design and Project Sharing     - EasyEDA - Online Schematic and PCB Design Software
ICOM Related Articles     - How to fix the IC-7000 audio noise (hiss)     - How to install a Collins Mechanical filter in IC-7000 transceiver     - UHF to VHF TV Converter for ICOM IC-7000     - 433MHz ATV Transmitter and RX Converter for ICOM IC-7000        - IC-7300 Antenna Tuner Range Modification - From SWR 3:1 to 6:1     - IC-7300 Clock Back-Up Battery Replacement Modification

 

 

 

 

About me                    Leo Tiger

    QTH - Bucharest  (Old Pictures, Old Buildings, ART DECO), Romania,  Canada                                                                        

    Amateur Radio - Since 1978 - First Class CEPT License, and Canadian Advanced License.

    Interests - Homebrew RF and Microwave amateur radio equipment

                    - CW, ATV, SSTV, RTTY, PSK31(65, 125) , Spread Spectrum - ROS , Weak Signal Communication - WSJT, MSHV

 

                    - Operating Low TX Power - QRP  

    "Circuits for Radio Amateurs"  (Montaje pentru Radioamatori)

    University "Politehnica" Bucharest  -  Faculty of Electronics and Telecommunications.         

    

     My Resume/CV (click on the logo for info)

                         

    My Links

 

-- Nothing lasts forever. Especially on the Internet. If you like it, don't bookmark...download it --

• Links to RF and Microwave Courses - University Lectures and Publications

• Links to Old Radio Frequency Books - Archive Collection

• SCI-HUB...to remove all barriers in the way of science
• RF Webinars Slides - Archive Collection

• Dubus Magazine - Archive Collection Articles 1982 - 1992

• Ham Radio Magazine - Archive Collection - 1968 - 1990

• VHF Communications Magazine - Archive Collection 1969 - 2013

• Funkamateur - Archive Collection - 1958 - 1995 1995 - 2016  2017 - 2020 2021 2022 (in German)

• QST Magazine - Archive Collection 1916 - 1969 2016 - 2021

• CQ Magazine - Archive Collection - 1945 - 2020 2021- 2023

• 73 Amateur Radio Today Magazine - Archive Collection 1960 - 2003

• RF Design Magazine - Archive Collection  2001 - 2007

• Funkschau - Archive Collection - 1927 - 1983 (in German)

• Amaterske Radio - Archive Collection - 1952 - 2009 (in Czech)

• Elektor Magazine - Archive Collection - 1974 - 2015

• Ham Radio Today - Archive Collection - 1983 - 1999

• Crystal Sets to Sideband - K0IYE - A "must to read" guide to building radios.

• The Real Inventor of Morse code - Alfred Vail  "A patient waiter is no loser"

• The Art & Skill of Radio-Telegraphy - N0HFF "Don't try to teach the Ears through the Eyes"

• FREE e-magazine devoted to Antennas and Amateur Radio - Antentop.org

• QRP Homebuilder - VE7BPO

• QRP Notebook - W1FB

• The Best QRP Projects from QST and ARRL Handbook - KU7G

• Practical Radio Circuits - R. Haigh

• Microwave Know How for the Radio Amateur - G8ATD

• Microwave Projects - G8ATD

• Microwave Communications Handbook - K4TWJ

• The Gunnplexer Cookbook - W4UCH

• Antenna Handbook - U.S. Marine Corps

• Practical Antenna Handbook - J.Carr - KI4PV

• Explaining ARRL Technical Reviews of Radios - VA7OJ

• Blocking Dynamic Range in Receivers - SM5BSZ

• The Beginner's Handbook of Amateur Radio - W5ZPV

• The Radio Amateur's Satellite Handbook - K2UBC

• An Introduction to Antenna Theory - Wright

• VHF/UHF DX Book - G3SEK

• History of Telegraphy - Beauchamp

• Foundations for Microstrip Design - Edwards, Steer

• Radio and Electronics Cookbook - RSGB

• Radio Communication Handbook RSGB - 14th Ed.

• dB or not dB? Everything you ever wanted to know about decibels but were afraid to ask…

• ARRL - Handbook 1926 - 1984 1989 2011

• ARRL - Antenna Book 1974 1995 1997 2007

• ARRL - Antenna Compendium - Vol.1 Vol.2 Vol.3

• ARRL - Basic Antennas - W1ZR

• TEHNIUM - Electronics Magazine - Archive Collection 1980 - 2006 (in Romanian)

• Radiocomunicatii si Radioamatorism - Archive Collection 1990 - 2008 (in Romanian)

• Radio Electronics Magazine - Archive Collection 1980 - 1992

• American Radio History - Archive Collection of Old Radio Publications

• Radio Telegraphy - History, Keys, Operations, Technology

• Wireless World Magazine - Archive Collection 1911 - 1987

• RCA Ham Tips - Archive Collection - 1938 - 1970

• GE Ham News - Archive Collection 1946 - 1963

• Ham Radio Horizons - Archive Collection - 1977 - 1979

• Megahertz Magazine - Archive Collection - 1982 - 2012 (in French)

• Radio Magazine - Archive Collection - 1946 - 2017 (in Russian)

• Radio Televiziya Elektronika - Archive Collection - 1952 - 2002 (in Russian)

• INTRONI.it - Collection of Old Electronics and Radio Magazines (in Italian and English)

• N5DUX - Amateur Radio pdf Files Collection

• World Radio History - Old Radio Magazines Archive Collection

• Hewlett-Packard Journal - Archive Collection 1949 - 1998

• Hewlett-Packard Bench Briefs - Archive Collection 1964 - 1998

• Hewlett-Packard Applications Notes - Archive Collection 1962 - 1989

• Hewlett-Packard Seminar Notes - Archive Collection 1976 - 2007

• Collins Radio Equipment Manuals

• Amateur Radio Transceivers - Schematics and Manuals - Modifications

• Manualslib - The Ultimate Manual Library Collection

• Sherwood Engineering - Receiver Test Data

• Datasheets360 - Source of Electronic Component Datasheets and Distributor Pricing

• JLCPCB - High Quality and Low Cost Printed Circuit Boards - Production and Prototypes

• DX News - DX Peditions Amateur Radio

• WA7BNM - 8-day and 12-month Ham Radio Contest Calendar

• W2AEW - Amateur Radio and RF Basics - Video Channel

• WD6CNF - PC Sound Card Analyzers and Decoders

• WN2A - Homebrew Radio

 

Romanian Amateur Radio Federation
Radio Amateurs of Canada

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- Links to RF and Microwave Magazines (click on the logo)

 

- Links to RF and EM Software

 

 

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This webpage is dedicated only for information and educational purposes.

"Wherever smart people work, doors are unlocked" - Steve Wozniak

 

                                                                            73's from iulian, YO3DAC / VA3IUL

   

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