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![]() "Ian" napisał w wiadomości ... In message , Szczepan Bialek writes -------------------------------------------------------------------- Instalacja anteny dipolowej sklada sie z: - anteny - promiennik i przeciwwaga, które sa zbudowane z dwóch jednakowych przewodów, lub kawalków metalu. Z racji tego, ze oba te elementy sa identyczne (ksztalt, material, dlugosc), maja takie same parametry - sa symetryczne. - przewodu zasilajacego - kabel koncentryczny, w którym sygnal przesylany jest przez zyle wewnetrzna a powraca oplotem ekranu. Oplot i zyla wewnetrzna maja inny przekrój i ksztalt, a co za tym idzie maja inne parametry elektryczne (np. impedancje) - sa niesymetryczne. " "Installation of a dipole antenna consists of: - Antenna - radiator and counterweight, which are built from two the same wires, or pieces of metal. Because of this, with both elements are identical (shape, material, length), have the same characteristics - are symmetrical. - Power cable - coaxial cable in which the signal transmitted by wire inner braid and returns the screen. Braid and lived inner diameter and have a different shape, " Braid and lived inner diameter and have a different shape,..." Should be: " Braid and lived inner wire have a different diameter and shape ...." and thus have different electrical parameters (eg impedance) - are unbalanced. " 73, Ian (no, the other one). S* (always the same) |
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