Anteenada Yagi, sida anteenada jihaynta caadiga ah, ayaa si weyn loogu isticmaalaa qaybaha HF, VHF iyo UHF.Yagi waa anteenada dhamaadka-shubka ah oo ka kooban oscillator firfircoon (badanaa oscillator laalaaban), milicsi dadban iyo tiro hagayaal dadban oo si barbar socda loo habeeyey.
Waxaa jira arrimo badan oo saameeya waxqabadka anteenada Yagi, iyo hagaajinta anteenada Yagi waa ka dhib badan tahay anteenooyinka kale.Laba qaybood oo anteenada ah ayaa inta badan la hagaajiyaa: soo noqnoqda resonant iyo saamiga hirarka taagan.Taasi waa, inta jeer ee resonant ee anteenada waxaa lagu hagaajiyaa agagaarka 435Mhz, iyo saamiga mowjadda taagan ee anteenadu waxay u dhowdahay 1 intii suurtagal ah.
Diyaarso anteenada meel u jirta 1.5m dhulka, ku xidh mitirka hirka taagan oo bilow cabbirka.Si loo yareeyo khaladaadka cabbirka, fiilada ku xidhaysa anteenada mitirka mawjadda taagan iyo raadiyaha mitirka hirarka taagan waa in uu ahaado mid gaaban intii suurtagal ah.Saddex meelood ayaa lagu hagaajin karaa: awoodda capacitor trimmer, booska wareegga gaaban ee gaaban iyo dhererka oscillator firfircoon.Tallaabooyinka hagaajinta gaarka ah waa sida soo socota:
(1) Ku hagaaji baarka wareegga gaaban ee 5 ~ 6cm ka fog barta iskutallaabta;
(2) Inta jeer ee gudbiyaha waxaa lagu hagaajiyaa 435MHz, iyo capacitor of dhoobada waa la hagaajiyay si loo yareeyo mowjadda taagan ee anteenada;
(3) Ka cabbir mowjadda taagan ee anteenada 430 ~ 440MHz, 2MHz kasta, oo samee garaaf ama liis xogta la cabbiray.
(4) U fiirso in inta jeer ee u dhiganta mowjadda ugu yar ee taagan (inta jeer ee resonance anteenada) ay tahay agagaarka 435MHz.Haddii inta jeer ee soo noqnoqda ay aad u sarreyso ama aad u hooseyso, mowjadda taagan ayaa mar kale lagu qiyaasi karaa iyadoo la beddelayo oscillator firfircoon dhowr milimitir dheer ama ka gaaban;
(5) Waxoogaa beddel booska usha wareegga-gaaban, oo si isdaba joog ah u hagaaji capacitor-ka chip dhoobada si aad anteenada u istaagto mowjadda ugu yar ee suurtogalka ah agagaarka 435MHz.
Marka anteenada la hagaajiyo, hal meel hagaajiso, si ay u sahlanaato in la helo xeerka isbeddelka.Sababtoo ah soo noqnoqoshada shaqada ee sarreeya, baaxadda hagaajintu maaha mid aad u weyn.Tusaale ahaan, awoodda la hagaajiyay ee kapacitor-ka wanaagsan ee ku xiran taxanaha γ bar waxay ku saabsan tahay 3 ~ 4pF, iyo isbeddelka dhowr meelood ee habka PI (pF) waxay keeni doontaa isbeddel weyn oo ku yimaada hirarka taagan.Intaa waxaa dheer, arrimo badan sida dhererka bararka iyo booska fiilada ayaa sidoo kale saameyn gaar ah ku yeelan doona cabbirka mawjada taagan, taas oo ah in fiiro gaar ah loo yeesho habka hagaajinta.
Waqtiga boostada: Nov-30-2022
