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Re: [TowerTalk] Radials, density, etc.

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Radials, density, etc.
From: Jan Erik Holm <sm2ekm@telia.com>
Date: Fri, 19 Dec 2003 07:00:06 +0100
List-post: <mailto:towertalk@contesting.com>
Interesting, thanks for the info, might not be important
after all to have a "even radial system".
Then I ask myself, would the case be the same in an array,
forexample a 4 square? Probably it seems to me.

Jim SM2EKM
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Jim Lux wrote:

I did some experimenting with NEC on a radial field that is uneven. A radial every 15 degrees (24 in a circle) on one side, and every 30 degrees on the other. Not a fancy model, in free space, just trying to find out what sorts of distortions there are.

Upshot: Not a huge difference - a dB asymmetry in the pattern, at most, except for very high takeoff angles.

Very high takeoff angles isn´t interesting anyway.

You can see it all at: http://home.earthlink.net/~w6rmk/antenna/radial1.htm


Comments welcome.




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