[amsat-bb] Gamma match on Circular polarization antennas?
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:
Leikhim and Associates
JLeikhim at Leikhim.com
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