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Re: Europa-List: Transponder antenna

Subject: Re: Europa-List: Transponder antenna
From: Jos Okhuijsen <josoke@ukolo.fi>
Date: Wed, 20 Dec 2006 21:26:08

Hi Kim,

The cable length used is probably less then 10 feet? The the loss will be  
1.45 db.
That's neglectible. Even when 0.5 to 1 db per connector is taken in  
account.
It's more important, as you said, to mimimize the blanking effect of  
things like the engine.
While VHF frequency radio signals still bend around objects, Ghz signals  
do not.
As somebody mentioned, far back in the tail, and as los as possible looks  
like the best option.
But, if i have followed this thread correctly, most of the problems are  
caused by having antennas in need of a ground plane without them, and  
groundplanes added to non- groundplane dipoles.
-- 
Kind Regards,

Jos Okhuijsen

workshopcam http://www.okhuijsen.org/plane
http:www.europaowners.org/kit600
mono xs, top on, gear in, tail wheel in, wings set, flapdrive in, tail  
closed, tailwheel in, tail top in, blue stuff filled, sanded and primed,  
fuel system in, doors done, windows in, sanding and filling the fuse and  
wings, engine installation, panel



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