Uma ufuna i-antenna ebiza kancane, futhi elula yokwakha, i-J-pole antenna yinhle kakhulu! Mayelana nesikhathi samahora, kanye nemikhiqizo enenani elingama-$15, ungaba ne-antenna ye-j-pole eyenza yonke indawo ngendlela emangalisayo.
I-antenna ye-j-pole imvamisa iyi-dipole ye-wave eyisigamu esetshenziswa ekugcineni esebenzisa i-1/4 wave shorted stub efana nesiguquli sokumelana. I-antenna ye-j-pole izokhiqiza okungaphansi kuka-3 DB wenzuzo yonke indawo.
Umkhiqizo engiwukhethe ukwakha i-j-pole antenna kwakuyipayipi lethusi elingu-3/4 intshi elisetshenziselwa ukufaka amapayipi. Nazi izinhlelo zokuthuthukisa i-antenna ye-J-pole engamamitha angu-2:
Izilinganiso ezingenhla ze-J-pole zihlala zingamayintshi. Izilinganiso zabo bonke ubude, kanye nobude be-stub zisuka emugqeni omaphakathi wepayipi elihlukanisayo (elivundlile) ukuya phezulu kothi. Isixhumanisi esilinganisweni singamayintshi angu-2 1/4 ukusuka phezulu komhlanganyeli ovundlile kuya endaweni yesixhumanisi. Ububanzi obuphakathi kwengxenye eyinhloko ye-j-pole centerline kanye ne-tuning stub centerline ngu-2 ″. Ngisike usayizi we-RG-8X we-foam coax waba ubude obungu-67 ″ ku-feedline, futhi ngiphinde ngijike ama-4 (amancane ngendlela ongayithola) afakwe ohlwini ngezansi kwengxenye eqondile yesigaba esifanayo. Lokhu kuzosusa umugqa wokuphakelayo ovela ku-j-pole antenna, kanye nosizo oluhlinzeka ngokuvikeleka kombani. Xhumanisa ikhondukta emaphakathi ye-coax kusici esiyinhloko, kanye nonogada ku-tuning stub ye-j-pole.
Kuzo zonke lezi zilinganiso ezingenhla, kufanele kucatshangelwe mayelana nokuqala izindawo zokwakha i-j-pole. Nginamathisela i-coax okwesikhashana ngisebenzisa izinsimbi ze-hose eyi-intshi engu-1, futhi ngilungisa ukuxhumeka kwe-coax kuqala ku-SWR ephansi kakhulu. Ukusuka lapho, ngilungisa ubude besici esiyinhloko se-J-pole. Ngemuva kwalokho ngiqala kabusha ngokulungisa kabusha isixhumanisi se-coax.