[amsat-bb] Re: satellite antenna

[Bob Bruninga]

> 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


_______________________________________________
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb