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Old July 20th 12, 06:47 PM posted to rec.radio.amateur.antenna
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Default UK earthling - was: Dipole-2 different wire sizes?


"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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