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Re: [TowerTalk] Enhanced OWA

To: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>, "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Enhanced OWA
From: Brian Beezley <k6sti@att.net>
Date: Fri, 20 Apr 2018 08:59:14 -0700
List-post: <mailto:towertalk@contesting.com>
Is anywhere the information how the bent driver works?


I don't know how it works, Maximo.

I have been using bent elements to design antennas for the 88-108 FM broadcast band for about ten years. Bent elements can really benefit designs that must have good patterns over a 20% bandwidth. I got the idea from the original Moxon 2-element Yagi, the one that bends driven element and reflector tips at right angles toward each other. I figured the bends just increased the coupling between the two elements without decreasing the distance between their central high-current regions. So I experimented with other coupling methods I thought might be easier to construct. A bent driven element is particularly easy since the element usually is already split in the middle and all you need to do is angle the mount on each side. Some builders preserve an existing mount with the element straight in the center and bend it a short distance out with a tubing bender. That seems not to degrade the benefit.

http://ham-radio.com/k6sti/five.htm

http://ham-radio.com/k6sti/ly.htm

Brian
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