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Topband: Fw: Flag/Pennant Question

To: "Topband Reflector" <topband@contesting.com>
Subject: Topband: Fw: Flag/Pennant Question
From: "Luis Mansutti IV3PRK" <luisprk@tin.it>
Date: Tue, 29 Nov 2011 17:51:00 +0100
List-post: <topband@contesting.com">mailto:topband@contesting.com>
> On Mon, 28 Nov 2011 21:49:40 -0500
>  W2PM <w2pm@aol.com> wrote:
> Why would you do that?
>
> >> I'm wondering if anyone has ever built or modeled a
>>>multi-turn flag or pennant antenna. I'm thinking maybe an
>>>odd number of turns with the resistor in the middle of
>>>the middle turn.
>>> --Art Delibert, KB3FJO
>
> Art,
>
> I have tried it (what the heck, why not?). Using a 2m x 2m
> loop, 1m above average ground: The F/B (better than 25 dB)
> and RDF (7.8 dB) are the same as a single turn loop. Gain
> is higher by 2 dB (-46 dBi). Needs three separate loads,
> one on each of the back-side vertical wires. This antenna
> would be hard to match due to high and highly reactive
> feed point impedance. I believe it is not worth the
> trouble for the small increase in gain.
>
> Cheers,
>
> George, AA7JV
 
 Art,
I kave also tried it, see the PDF downloadable on this page: 
 http://www.iv3prk.it/3-wires-mini-loop.htm
but, as George said, not worth the trouble !

BTW George, how could you model it ?
 
 73
Luis IV3PRK

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