Thank you Dan,
Interesting article and it says it all.
Date: Sun, 3 Aug 2008 21:07:07 -0400
To: email@example.com; firstname.lastname@example.org
Subject: Re: [TowerTalk] Coaxial Moxon
A quarter wave coax, shorted at the end shows an infinite impedance.Is it
possible what is described in the link?
A coax just a little bit shorter than a quarter wave shows a VERY quickly
changing inductive reactance ... so you can change the stub length +/- a few
centimeters and find the exact value of reactance you need to load the antenna.
But, it's VERY lossy to operate a stub near resonance as a reactance. I
estimated something like Q = 1 or Q= 5 for the "quarter wave" (actually a
little shorter) stubs in that antenna, and a model of it seemed to suggest that
the gain would be *negative 10dBi* and it would have zero F/B ratio.
You might look at http://www.karinya.net/g3txq/coax_antennas/ as well.
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