Antenna ya Yagi, nka antenne ya classique yerekanwe, ikoreshwa cyane mumatsinda ya HF, VHF na UHF.Yagi ni antenne ya nyuma irasa igizwe na oscillator ikora (mubisanzwe oscillator ikubye), icyuma cyerekana pasiporo hamwe nubuyobozi butari buke butondekanye.
Hariho ibintu byinshi bigira ingaruka kumikorere ya antenna ya Yagi, kandi guhindura antenne ya Yagi biragoye kuruta izindi antene.Ibipimo bibiri bya antene byahinduwe cyane: resonant frequency hamwe numubare uhagaze.Nukuvuga ko inshuro ya rezanant ya antenne ihindurwa hafi 435MHz, kandi igipimo cyumuvuduko uhagaze wa antenne kiri hafi ya 1 bishoboka.
Shiraho antene nka 1.5m uvuye hasi, uhuze metero yumurongo uhagaze hanyuma utangire gupima.Kugirango ugabanye amakosa yo gupimwa, umugozi uhuza antene na metero ihagaze hamwe na radio kuri metero ihagaze bigomba kuba bigufi bishoboka.Ahantu hatatu harashobora guhindurwa: ubushobozi bwa capacitor ya trimmer, umwanya wumurongo muto wumuzunguruko hamwe nuburebure bwa oscillator ikora.Intambwe zihariye zo guhindura ni izi zikurikira:
(1) Kosora umurongo muto wumuzunguruko 5 ~ 6cm uvuye kumurongo wambukiranya;
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(3) Gupima umurongo uhagaze wa antenne kuva 430 ~ 440MHz, buri 2MHz, hanyuma ukore igishushanyo cyangwa urutonde rwamakuru yapimwe.
.Niba inshuro ari ndende cyane cyangwa nkeya, umuraba uhagaze urashobora kongera gupimwa mugusimbuza oscillator ikora milimetero nkeya cyangwa ngufi;
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Iyo antenne ihinduwe, hindura ahantu hamwe icyarimwe, kugirango byoroshye kubona itegeko ryimpinduka.Bitewe numurimo mwinshi wo gukora, amplitude yo guhinduka ntabwo ari nini cyane.Kurugero, ubushobozi bwahinduwe bwa capacitori nziza yo guhuza ihujwe murukurikirane kuri γ bar ni nka 3 ~ 4pF, kandi ihinduka rya kimwe cya cumi cyuburyo bwa PI (pF) bizatera impinduka nini mumurongo uhagaze.Byongeye kandi, ibintu byinshi nkuburebure bwumurongo hamwe nu mwanya wa kabili nabyo bizagira ingaruka runaka mugupima umuraba uhagaze, ugomba kwitabwaho mugikorwa cyo guhindura.
Igihe cyo kohereza: Ugushyingo-30-2022
