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Kahulugan: input Aerial yaong Nagtitinda boltahe signal at koryente signal upang ihambing, tawagan ang input impedance ng aerial. Input impedance ay may risistor pabigatin Rin at riektens pabigatin Xin, lalo Zin = Rin + J Xin. Ang pagkakaroon ng riektens timbang ay maaaring makabawas mula sa himpapawid upang maging tapat mula sa linya ng gumawa ng isang kasalukuyan ng pagkuha ng lakas ng signal, nang naaayon, kailangang gumawa riektens pabigatin ay bilang malayo hangga't maaari 0, sagot sa gumawa ang input impedance ng panghimpapawid ay purong risistor bilang malayo hangga't maaari lalo. Sa katunayan, kahit na disenyo, debugs nang napakahusay antena, medyo riektens bigat pa rin ng dati ay nilalaman upang maging sulit sa input impedance nito.
Ang istraktura na input impedance at antena, sukat at nagtatrabaho wavelengh ay nababahala, kalahati semmetry pilitin anak nito ay ang pinakamahalagang pangunahing antena, input impedance nito upang maging 42.5 (ng j ng + ng Zin = 73.1). Dapat paikliin ang haba nito (3 ~ 5) kapag%, maaari puksain ang kasama ng mga ito riektens pabigatin, gawin ang input impedance ng panghimpapawid ay purong risistor, ngayon input impedance ay Zin = 73.1 (Europa), (nominal 75). Pansin, sabihin natin mahigpit na, ang aerial input impedance ng purong risistor kasarian ay upang nodding dalas ng character lamang.
pakiusap Pindutin dito upang makakuha ng aming dipole antena
Ituro out nagkataon, kalahati halaga upang pilitin input impedance anak ay kalahating semmetry pilitin makaapat bata, lalo Zin = 280 (), (nominal 300 Europa). Kawili-wiling ay, sa alinman sa antena, ang mga taong laging pwedeng debugged sa pamamagitan ng aerial impedance, sa loob ng mga limitasyon ng pagtatrabaho dalas ng mga kinakailangang ito, ang walang laman department na gumagawa ng pag-input impedance ay napakaliit at real departamento ay malapit sa 50 Europa medyo, gumawa at sa gayon ay ang input impedance ng panghimpapawid ay Europa ng Zin = Rin = 50 ----- Ito ay maaaring nasa mabuting impedance mula sa himpapawid upang tumugma sa lugar na may linya ng gumawa ng isang kasalukuyan ng kinakailangan.
pakiusap Pindutin dito upang makakuha ng aming dipole antena
Ang aming iba pang mga produkto:
Propesyonal na FM Radio Station Equipment Package
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id.fmuser.org -> Indonesian
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sw.fmuser.org -> Swahili
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