[amsat-bb] Re: satellite antenna

any one have a good idea for a omni directional antenna for the birds?

3/4 wave vertical. Has almost 7 dBi gain above 30 deg. For 70cm downlinks, this means a 19.5" vertical over a ground plane. Also is a perfect 1/4wave on 2 meters.

It's the yellow curve on the plot about 80% down this page: http://aprs.org/astars.html

Bob, Wb4aPR

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