Yagi antenna, ngati anteric tokha, amagwiritsidwa ntchito kwambiri ku HF, VHF ndi aihf. Yagi ndi antenna owombera omaliza omwe ali ndi oscillator (nthawi zambiri amakhala opindika), chowunikira kwambiri komanso magetsi angapo olongosola omwe adapangidwa mofananamo.
Pali zinthu zambiri zomwe zimakhudza magwiridwe antchito a Yagi antenna, ndipo kusintha kwa Yagi antenna kumakhala kovuta kuposa antennasi ena. Magawo awiri a antena amasinthidwa makamaka: pafupipafupi pafupipafupi komanso mawonekedwe a funde. Ndiye kuti, pafupipafupi kwa antenna zimasinthidwa pafupifupi 435mhz, ndipo chiwerengero cha funde cha nyemba chimakhala pafupi ndi 1 momwe mungathere.
Khazikitsani antenna pafupifupi 1.5m kuchokera pansi, kulumikiza mita yoyimirira ndikuyambitsa muyeso. Pofuna kuchepetsa zolakwika, chingwe cholumikiza antena ku mitanda yoyimirira ndi wayilesi ku mitanda ikuyenera kukhala yochepa. Malo Atatu Atha Kusintha: Kutha kwa Cakulu ya Trimmer, malo osungira zakale ndi kutalika kwa oscillator. Njira zosintha zina ndi izi:
(1) Sinthani bala lalifupi 5 ~ 6CM kutali ndi mtanda;
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. Ngati pafupipafupi kapena otsika kwambiri, funde limatha kuyesedwanso pokonzanso oscillator angapo mamilimita ochepa kapena ofupikira;
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Antenna ikasinthidwa, imasintha malo amodzi nthawi imodzi, kotero kuti ndikosavuta kupeza lamulo losintha. Chifukwa cha kuchuluka kwa ntchito yayitali, matalikidwe a kusintha siakulu. Mwachitsanzo, kusinthidwa kwa chipachikulu cha captacitor cholumikizidwa mu mndandanda wa γ bar ndi pafupifupi 3 ~ 4pf, ndi kusintha kwa magawo khumi a njira ya PiT (PF) imasintha kwambiri. Kuphatikiza apo, zinthu zambiri monga kutalika kwa bar ndi chingwe cha chingwecho lidzakhalanso ndi vuto lililonse pakuyenga, zomwe ziyenera kugwidwa ndi chidwi pakusintha.
Post Nthawi: Nov-30-2022
