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Does an UnUn decouple an antenna from the feedline?
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November 27th 07, 05:18 PM posted to rec.radio.amateur.antenna
Richard Clark
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First recorded activity by RadioBanter: Jul 2006
Posts: 2,951
Does an UnUn decouple an antenna from the feedline?
On Tue, 27 Nov 2007 08:57:40 -0800 (PST),
wrote:
My question is will this properly prevent
feedline radition?
Hi Scott,
The long answer: No.
Is some feedline radiation always expected /
inherit in this type of antenna design?
The short answer: Yah, sure, youbetcha!
The answer you need: Stick with the UnUn, and add a choke directly
beneath it. Then add another choke a quarterwave beyond that, and
possibly a third one a quarterwave further along. That should do it
for this exceptionally (notoriously) unbalanced design.
73's
Richard Clark, KB7QHC
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