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[antennaware] note on a Hy-Gain beam

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Subject: [antennaware] note on a Hy-Gain beam
From: (L. B. Cebik)
Date: Thu, 16 Apr 1998 17:21:32 -0400 (EDT)
Appreciate notice that Hy-Gain has a number of models on line--and
appreciate the openness of Hy-Gain in putting them there.

For those interested in UHF beams, you may wish to model the 7031--an
outstanding design at 19.6 dBi gain and 31 dB F-B on a boom under 24'
long for a 50-ohm feed.

If you need less gain (about 3.25 dB less) and can live with only 24.2 dB
F-B, try modeling only the first 16 elements (from the reflector forward).
They fit on a 10' boom and provide an even more perfect 50-ohm match--at
least in the NEC-4 model.  Beam width also increases from 20 degrees for
the long version to 28 degrees for the "short" model.

Whwether you build it or not, it makes a good reference for comparison
with other models you develop.



L. B. Cebik, W4RNL         /\  /\     *   /  /    /    (Off)(423) 974-7215
1434 High Mesa Drive      /  \/  \/\     ----/\---     (Hm) (423) 938-6335
Knoxville, Tennessee     /\   \   \ \   /  / || /      (FAX)(423) 974-3509
37938-4443     USA      /  \   \   \ \       ||    

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