Last update : Aug 30, 1997
Quagi Antenna
Quagi °á§@¡¨£}£¹£«¡@£|£¸£»¡¨¡A¥¦¬O§Ú©Ò°µ¹L³Ì²³æ¡B®Ä²v³Ì°ªªº VHF/UHF Beam
Antenna¡C³o¤ä¤Ñ½u¬O¥H Quad §@¬°¤Ï®g¤Î¿ç®g¤¸¥ó¡A¦Ó¨ä¾Éªi¤¸¥ó«h©M Yagi-Uda
Antenna §¹¥þ¤@¼Ë¡A©Ò¥HºÙ¬° Quagi¡C
¦³Ãö Quagi ªº¤å³¹³Ì¦¥X²{©ó 1977 ¦~ 4 ¤ë¥÷ªº QST Âø»x¡A§@ªÌ¬° Wayne Overbeck
/ K6YNB¡A¤¶²Ð¥L±N VHF Yagi §ï¸Ë¬° Quagi ªº¸g¹L¨Ã¦C¥X 144¡B222¡B432 MHz 8
Element Quagi ªº¤Ø¤o¡C¦¸¦~ 2 ¤ë¥÷¡Aì§@ªÌ¤S¦b QST Âø»xµoªí¤F¤@½g 432 MHz 15
Element Long Boom Quagi ªº¤å³¹¡A³o¨â½g¤å³¹¸g¹L¾ã²z«á³Q¦¬¿ý¦b The ARRL
Antenna Handbook ¤¤¡A¥Ñ¦¹¥i¨£ Quagi ½T¦³¨ä¿W¨ì¤§³B¡Aȱo¤j®a¤@¸Õ¡C
Quagi ªº¬ãµo¹Lµ{
³oÓ¬G¨Æn°l·¹¨ì 1970 ¦~¡C¦b 1970 ¦~ K6YNB ®³¤F¤@¤ä¸¹ºÙ¦³ 13.5dBD ªº¼t»s
Yagi ¨ì West Coast VHF Conference ¤¤¶q´ú¡A¹ê´úµ²ªG¥O¤H¤j¥¢©Ò±æ¡A³ºµM¥u¦³
6.4dBD¡C§@ªÌÀˬd¤Ñ½uµo²{¨Ã¨S¦³²Õ¸Ë¿ù»~¡A´N¦A®³¤@¤ä¦P«¬¸¹ªº¤Ñ½u¥h¶q´ú¡Aµ²ªG¤]
¬O¥u¦³ 6dBD ¥ª¥k¡C©ó¬O¤@¦ì¦Ñ¤â§i¶D¥L°ÝÃD¥i¯à´N¥X¦b Gamma Match¡A¦]¬° Gamma
Match ¥Î¦b HF ÀW¬q®ÄªGÁٺ⤣¿ù¡AÀHµÛÀW²v¤É°ª¡AGamma Match ªº®Ä²vº¥º¥°§C¡A¨ì
¤F 144 MHz ®Ä²v¤w¸g¦n¤£¨ìþ¸Ì¥h¤F¡A¨ì¤F 430 MHz ²ª½µLªk¨Ï¥Î¡C
«ç»ò¿ì©O¡H³o¤ä¤Ñ½u¡ª¹ª¾µL¨ý¡A±ó¤§¥i±¤¡ª¡A©ó¬O§@ªÌ§â¿ç®g¤¸¥ó´«¦¨ Square Loop
¡A¦Ó¤Ï®g¤¸¥ó¤Î¾Éªi¤¸¥ó«h¤£°µ§ïÅÜ¡A¸g¹L¶q´ú³o¤ä¤Ñ½uªº¼W¯qÅܦ¨¤F 9.8dBD¡A³o¼Ë
ªºµ²ªG¹ê¦b«D±`¥O¤H®¶¾Ä¡A¦]¬°²z½×¤W¤@Ó Loop ªº¼W¯q¤j¬ù¬° 1 dBD ¥ª¥k¡A¦Ó¥t¥~
¦h¥X¨Óªº¼W¯q«h¬O¦]¬°¤Ö¤F Gamma Match ¦Ó¨Ï±o¤Ñ½uªº®Ä²v´£°ªªº½t¬G¡Aªp¥B¥Ø«e¥u
¬O§â¤Ñ½uªº¿ç®g¤¸¥ó´«±¼¦Ó¤w¡A¦pªG¦A±N¤Ñ½uªº¨ä¥L³¡¥÷«·s³Ì¨Î¤Æ«hÀ³¸ÓÁÙ¦³§ó¦nªº
ªí²{¡C
©ó¬O§@ªÌ´N©M¥LªºªB¤Í WB6RIV ªá¤F¤@¾ãÓ®L¤Ñªº®É¶¡¡A¥H Try and Error ªº¤èªk´M
§ä Quagi ªº³Ì¨Î¤Ø¤o¡]³o®ÉÔ¥L̤w¸g±N¿ç®g¤¸¥ó¤Î¤Ï®g¤¸¥ó´«¦¨¤F Square Loop¡^
¡A¸Õ·Q¦b·í®É¹q¸£ªº³nµwÅé¨Ã¤£µo¹F¡A¦b¨S¦³¿ìªk¥Î¼ÒÀÀªºª¬ªp¤U¡A·íµM¤]¥u¯à Try
and Error¡C³Ì«á¥LÌ°µ¥X¤F 8 Element Quagi¡A¦b 144 MHz ¤è±¡AQuagi ¬°¥LÌűo
¤F¤T¦¸¤Ñ½u¤ñÁÉ¡A¦Ó¹ê´ú¶q¨ìªº¼W¯q¬ù¬° 11.5~14.2 dBD ¡]¦]¬°¤T¦¸¤ñÁɩҥΪº°Ñ¦Ò
¤Ñ½u¨Ã«D§¹¥þ¬Û¦P¡A©Ò¥H 3 ¦¸¶q¥X¨Óªº¼W¯q¨Ã«D§¹¥þ¬Û¦P¡^¡C
Yagi-Uda Antenna¡BQuad Array »P Quagi ªº¤ñ¸û
- ¤@¡B´Nµ²ºc¦Ó¨¥
-
µLºÃªº¡AQuad Array ¬O¤ñ Yagi-Uda Antenna ½ÆÂø¦h¤F¡A¤×¨ä¦b HF ÀW¬q¡A4 ¤¸¥óªº Quad
Array ¤w¸gºâ¬O¯E¤jªº¤uµ{¤F¡A¦Ó 4 ¤¸¥ó Yagi-Uda Antenna ÁÙºâ¦n³B²z¡C¦b VHF/UHF
ÀW¬q¡AQuad Array ªº Size ÁöµM¤£¬O°ÝÃD¡A¤£¹Ln³B²z¨CÓ¤¸¥óªº¤ä¼µ«o¥O¤H¤ß·Ð¡C
- ¤G¡B´N¤Ç°t¦Ó¨¥
-
³æ¤@Ó Loop ªºªý§Ü¬ù¬° 100£[¡A¦b Quad Array ¤¤¬ù°¬° 60~50£[¥ª¥k¡F³æ¤@Ó
Dipole ªºªý§Ü¬° 73£[¡A¦b Yagi-Uda Antenna ¤¤Åܬ° 40~30£[¥ª¥k¡C¥Ñ¦¹¥iª¾ Quad
Array ¥i¥Hª½±µõX¤J¡A¦Ó Yagi-Uda Antenna «h»Ýn¥Î¤Ç°tºô¸ô¨Ó´£ª@ªý§Ü¡A¦p Gamma
Match¡BT Match¡BHairpin µ¥¡AµM¦Ó³o¨Ç²³æªº¤Ç°tºô¸ô¦b HF ªºªí²{ÁÙ¦n¡A¦ý¬O¦b
VHF ¥H¤WªºÀW²v´N«Ü®e©ö±N«H¸¹°I´î¡A©ó¬O¦n¤£®e©ö±q¤Ñ½u±o¨Óªº¼W¯q¡A´N³Q¤Ç°tºô¸ô
Ä묹±¼¤F¡C¦]¦¹¥Ø«e³\¦h¼t»sªº VHF/UHF ³£¨Ï¥Î¯S§Oªº¤Ç°tºô¸ô¡A¦ý¬O»s§@³Â·Ð¡A©Ò
¥H´N·~¾lªºÆ[ÂI¨Ó¬Ý¡A¦b¤Ç°t¤è± Quad Array ¬O¤ñ¸û¦ûÀu¶Õªº¡C
- ¤T¡B´N¼W¯q»P¤Ñ½u¤j¤pªº¦Ò¶q¦Ó¨¥
-
®Ú¾Ú¬ã¨s¡A2 Element Quad Array ¬ù¤ñ 2 Element Yagi-Uda Antenna ¦h¤F 1.5 dB ªº¼W
¯q¡CY©T©w¤Ñ½uÁ`ªø«× (Boom Length)¡A«h Quad Array ¬ù¤ñ Yagi-Uda Antenna ¦h¤F 2
dB ªº¼W¯q¡FY¤Ñ½uªºªº¤¸¥ó¼Æ¥Ø¬Û¦P¡A«h Quad Array ¬ù¤ñ Yagi-Uda Antenna ¦h¤F 1 dB
ªº¼W¯q¡FY¨â¤ä¤Ñ½uªº¼W¯q¬Û¦P¡A«h Quad Array ªºªø«×³q±`¥u¬O Yagi-Uda Antenna ªº¤G
¤À¤§¤@¡CÅãµMªº¡A¦b³o¤è± Quad Array ¬O¦û¤F¤@ÂIÂIÀu¶Õ¡A¤£¹L¹ï°ª¼W¯qªº¤Ñ½u¦Ó¨¥
¡A³o¼ËªºÀu¶Õ¨Ã¤£©úÅã¡C
- ¥|¡B´N¼W¯q»P»s§@ªºÃø©ö«×¦Ó¨¥
-
¥ô¦ó Beam Antenna ³£¦³¤@Ó²{¶H¡A¨º´N¬Oè¶}©lªº´XÓ¤¸¥ó¥i¥H¨Ï¼W¯q¼W¥[«Ü§Ö¡A¦ý
¨ì¤F¤@©w¼Æ¥Ø¥H«á¼W¯qªº¼W¥[´N«ÜºC¡A¤]´N¬O»¡¬°¤F¼W¥[¤@ÂIÂI¼W¯q¡A©¹©¹n¼W¥[«Ü¦h
¤¸¥ó¤~¿ì±o¨ì¡A³o·|¨Ï±o¤Ñ½uÅܱo¤Sªø¤S«¡A¤×¨ä Quad Array §ó¬O©úÅã¡C©Ò¥H·í¤¸¥ó
¼Æ¥Ø¤Öªº®ÉÔ¡AQuad Array ¸û¦ûÀu¶Õ¡F¤¸¥ó¼Æ¥Ø¦hªº®ÉÔ¡AYagi-Uda Antenna ¸û¦ûÀu¶Õ¡A
¨âªÌ¥i»¡¬O¦U¦³Àu¦H¡C
Quagi ¥H Square Loop °µ¬°¤Ï®g¤Î¿ç®g¤¸¥ó¡A¥H Yagi-Uda Antenna ªº¤è¦¡¨Ó°µ¾Éªi¤¸¥ó
¡A©Ò¥H¥¦¦³ Yagi-Uda Antenna µ²ºc²³æ¡B»s§@®e©öªºÀuÂI¡A¤]¦³ Quad Array ª½±µõX¤J¡B
¨S¦³¤Ç°t·l¯Óªº¦n³B¡F¦b¼W¯q¤è±¡A¥¦¤ñ Quad Array §C¤@¨Ç¡A¤ñ Yagi-Uda Antenna °ª¤@
ÂI¡A¦ý©M Quad Array ½ÆÂøªºµ²ºc¤ñ°_¨Ó¡AQuagi ºâ¬O¤@Ó«D±`¦Eºâªº³]p¡C
Quagi ªº»s§@
Quagi ªº¥~Æ[©M¤Ø¤o¦p¹Ï©Mªí¤@¨ìªí¤T©Ò¥Ü¡C
- ¨Ì·Ó³oӹϩҬ[³]¡A¨ä³õ«¬¬°¤ô¥°¾ªi¡C
- ªí¤@¬° 8 Element Quagi ¦U¤¸¥óªø«×¡C
Reflector ©M Radiator ªº¼Æ¾Ú¬O¶gªø¡ABoom ¬O«ü¤ä¼µ¤Ñ½u¤¸¥óªº¥D±ìªø«×¡A¤]´N¬O
Reflector ~ D6 ªº¶ZÂ÷¡C
- ªí¤G¬O¦U¤¸¥ó¤§¶¡ªº¶ZÂ÷¡A³Ì¤U±¤@¦æ
Stack Spacing ¬O«ü¨Ã¦C¨â¤ä Quagi ®É¡A¨â¤ä¤Ñ½uªº³Ì¨Î¶ZÂ÷¡C
- ªí¤T¬° 432MHz 15
Element Quagi ±q D7 ~ D13ªºªø«×»P¶ZÂ÷¡A¦Ó«e±ªº 8 Ó¤¸¥ó¦pªí¤@©Ò¦C¡C
Table 1 : Element Length (Unit:mm)
Length | 144.5MHz | 147MHz | 222MHz | 432MHz | 446MHz
|
---|
Reflector | 2200 | 2159 | 1432 | 711 | 689
|
---|
Radiator | 2083 | 2032 | 1359 | 676 | 657
|
---|
D1 | 913 | 897 | 594 | 298 | 289
|
---|
D2 | 908 | 892 | 590 | 297 | 287
|
---|
D3 | 903 | 887 | 587 | 295 | 286
|
---|
D4 | 899 | 878 | 581 | 292 | 283
|
---|
D5 | 894 | 878 | 581 | 292 | 283
|
---|
D6 | 889 | 873 | 578 | 291 | 281
|
---|
Boom | 4205 | 4126 | 2737 | 1405 | 1364
|
---|
Table 2 : Element Spacing (Unit:mm)
Spacing | 144.5MHz | 147MHz | 222MHz | 432MHz | 446MHz
|
---|
Re~Ra | 533 | 521 | 346 | 178 | 173
|
---|
Ra~D1 | 400 | 391 | 260 | 133 | 130
|
---|
D1~D2 | 838 | 826 | 546 | 279 | 272
|
---|
D2~D3 | 445 | 435 | 289 | 149 | 144
|
---|
D3~D4 | 663 | 651 | 432 | 222 | 215
|
---|
D4~D5 | 663 | 651 | 432 | 222 | 215
|
---|
D5~D6 | 663 | 651 | 432 | 222 | 215
|
---|
Stack | 3350 | 3300 | 2170 | 1090 | 1060
|
---|
Table 3 : D7 ~ D13 Of 432 MHz 15 Element Long Boom Quagi (Unit:mm)
D7 | D8 | D9 | D10 | D11 | D12 | D13
|
---|
289 | 287 | 287 | 286 | 284 | 283 | 281
|
---|
D6~D7 | D7~D8 | D8~D9 | D9~D10 | D10~D11 | D11~D12 | D12~D13
|
---|
305 | 305 | 286 | 291 | 233 | 314 | 349
|
---|
»s§@«ÂI¦p¤U¡G
- ¥H¤W¼Æ¾Ú¤D¬Oì§@ªÌ¸g¦h¦¸¹êÅç©Ò±o¨ìªº³Ì¨Î²Õ¦X¡AY·Qn±o¨ì³Ì¦nªº®ÄªG¡A½Ð¨Ï
¥Î¬Û¦Pªº§÷®Æ©M¤Ø¤o¨Ó»s§@¡AY¨Ï¥Î¤£¦Pªº§÷®Æ¡A«h±z¥i¯àn¦Û¦æ½Õ¾ã¤@¨Ç¼Æ¾Ú¤~
¯à¨Ï¤Ñ½uµo´§³Ì¨Îªº®ÄªG¡C
- ¤Ñ½uªº¥D±ì (Boom) ¥²¶·¨Ï¥Î¤£¾É¹q§÷½è¡A¦p¤ì´Ò¡B¶ì½¦ºÞµ¥¡C¨Ï¥Î¤ì´Ò³Ì¬°¤è«K
¡C
- ¤Ï®g¤Î¿ç®g¤¸¥ón¥Î½u®|¬° 2.0mm ¥~±¦³¶ì½¦µ´½t¥Öªº¹q½u»s§@¡A¦Ó¥B¤£¯à§âµ´
½t¥Öé°£¡C¦pªG§A¥Î§ó²Êªº¹q½u©Î¾TºÞ¡A«hªø«×¥i¯ànµu¤@ÂI¡FY¥Î¬Û¦P½u®|ªº»r
½u©Îº£¥]½u¡A«hªø«×´Nnªø¤@ÂI¡C
- ªí¦C¤Ï®g¤¸¥ó¤Î¿ç®g¤¸¥óªºªø«×¬O«ü¾Z±µ«áªºÁ`ªø«×¡A©Ò¥H¦b°Å¹q½u¤Î¾Z±µªº®ÉÔ
¥²¶·¦Ò¼{¾Z±µ«¦X³¡¥÷ªºªø«×¡CÁ`¤§´N¬OºÉ¶q±N»~®t±±¨î¦b 3mm ¥H¤º³Ì¦n¡C
- ¾Éªi¤¸¥ó¥Îª½®| 3mm ªº»É´Î¡B¾T´Î¡B¤£ù׿û´Î©Îº£¥]½u³£¥i¥H¡C
- ¦pªG§A¨Ï¥Î¤è§Î¤ì´Ò¨Ó°µ¬°¤Ñ½u¥D±ì¡A«Øij±z¥Î¡¨£v¡¨«¬§¨½u°v¨Ó©T©w¾Éªi¤¸¥ó³Ì
¤è«K¡C
- ½Ðª`·NõX¹qÂIªº¨ºÓÃä¬O»P¾Éªi¤¸¥ó¥¦æªº¡CY¾Éªi¤¸¥ó»P¦a±¥¦æ¡A¨º»ò´N¬O¤ô
¥°¾ªi¡FY¾Éªi¤¸¥ó»P¦a±««ª½¡A¨º»ò´N¬O««ª½°¾ªi¡C
- ²z½×¤W¡AõX¹q¤è¦¡À³±Ä¥¿Å¦¡õX¤J¡A¹ê»Ú¤W¨Ã¤£Á¿¨s³oÂI¡C§A¥i¥H±N¦P¶b¹qÆl©Î¢Û
®yª½±µ¾Z¦bõXÂI¤W¡A«ÂI¬O§â´¤²Ä 4 ÂIªºì«h¡C
- ¿ç®g¤¸¥ó¤Î¤Ï®g¤¸¥óªº Square Loop ¤£¶·¨è·N§é±o«Üº}«G¨SÃö«Y¡C
- ½Õ®Õ®ÉYµo²{ SWR ³Ì§CÂI¤£¦bì¨Óªº³]pÀW²v®É¡A¾A«×¦a×°Å¿ç®g¤¸¥óªºªø«×§Y
¥i¡C
- Y¿Ó®¶ÀW²v¤w¸g½Õ¾ã¦n¦ý SWR µyµy°¾°ª¡A«h¥i¥H§â¿ç®g¤¸¥óµyµy§é¦¨¡ª£¢¡ª§Î¨Ó
½Õ¾ã¡C
¨Ï¥Î¸gÅç
¤@¥¹§A°µ§¹¨Ã½Õ¾ã¦n§Aªº²Ä¤@¤ä Quagi¡A§A´N·|µo²{¥¦ªº»s§@¹ê¦b¤Ó²³æ¤F¡A¥H«á¤j·§
¤£¨ì 1 ¤p®É´N¥i¥H¦A½Æ»s¤@¤ä¡C
§Ú´¿¸g»s§@¹L¤@¤ä 432 MHz 9 ¤¸¥óªº Quagi ¥Î¨Ó°Ñ¥[ 85 ¦~ªº Field Day ³q«H¤ñÁÉ
¡A¶È§Q¥Î 3W ªº¥\²v§Y¥i¥Ñ·s¦Ë³qÁp¦Ü»O«n¡B«n§ë¡B»O¤¤¡B»O¥_¡A¨Ã¥B©M»O¥_ 20mW ªº
¹q¥x§¹¦¨³qÁp¡A¥i¨£ Quagi ªº¦¬µo¯S©Ê§¡¨Î¡C¦Ó§ÚªºªB¤Í Daniel ©Ò¨Ï¥Îªº 432 MHz
8 ¤¸¥ó Quagi¡A¸Ë¦b«Î³»¤W¤w¸g¨â¦~¤F¡A¨ä¥D±ì¡]¤ì±ø¡^¤´¥¼»G»kÂ_µõ¡A¥i¨£¤ìÀYªº@
ԩʨ䣦p§ÚÌ·Q¹³ªº®t¡C
¦A¦¸±j½Õ Quagi ¦³»s§@²³æ¡B§÷®Æ«K©y¡B°ª®Ä²vªºÀuÂI¡A¤£ºÞ±z¬O»s§@©w¦V¤Ñ½uªº°ª
¤â©Îµæ³¾¡A±z±Nµo²{ Quagi ±N¬O±zªº³Ì·R¡A¦pªG±z¥¿·Qn¦Û»s©w¦V¤Ñ½u¡A¤£n¦Ò¼{¤F
¡A´N¬O¥¦¡C
BV3FG / Robert Suen
|