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Uzunluğunda ve a kesit alanına sahip metal

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uzunluğunda ve A kesit alanına sahip metal çubuğun D.C. (doğru akım) direnci; Yüksek frekans direnci; P : çubuğun çevresi (2 b), R s : iletkenin yüzey direnci, w : açısal frekans , 0 : boşluğun manyetik geçirgenliği, : metalin iletkenliği
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Örnek 9: Bir rezonans yarım dalga dipolü bakır ( S/m) telden yapılmıştır. Eğer telin b yarıçapı ିସ ve /2 dipolün ışıma direnci 73 Ω ise f=100 MHz’te dipolün iletkenlik-yalıtkanlık (ışıma) verimini bulunuz. Çözüm: f=100MHz’de; C= ିସ ௛௙ , sinüzoidal akım dağılımlı /2 dipol için ௛௙ ’dir. Bu nedenle; ௛௙ = ଴.ଶହ ଺గ ௫ଵ଴ షర గଵ଴ (ସగ௫ଵ଴ షళ ) ହ.଻௫ଵ଴ =0.348 ohm Böylece; ௜௬ ௜௬ (dB)=10log(0.9952)=-0.02
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Anten Vektör Etkin Uzunluğu Antenin etkin uzunluğu anten ister doğrusal isterse açıklık olsun bir dalga üzerine düştüğünde açık devre terminallerinde indüklenen gerilimin belirlenmesinde kullanılan bir niceliktir.
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  • Winter '17
  • smith

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