Last update : Aug 30, 1997
LOGO

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¡A­È±o¤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¥L­Ì¤w¸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·Ó³o­Ó¹Ï©Ò¬[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
Quagi Antenna
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@ ­Ô©Ê¨Ã¤£¦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