[amsat-bb] Gamma match on Circular polarization antennas?

Joe Leikhim rhyolite at leikhim.com
Mon May 18 07:02:20 UTC 2015

The old Cushcraft 144-20T CP antenna (Part of AOP-1) used Gamma Match on 
both phased yagis, on a common boom. This wasn't the greatest antenna in 
the world, it suffered precipitation static discharge because of the 
Gamma Match being ungrounded, among other mechanical deficiencies. But 
it did seem to have acceptable circularity, good directivity and plenty 
of gain  I suspect the problem may be in achieving identical phasing 
between antennas. A phasing problem will affect circularity.

See tuning discussion in the archive:

Joe Leikhim

Leikhim and Associates

Communications Consultants

Oviedo, Florida

JLeikhim at Leikhim.com



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