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Posted for "Charles R. Patton" <charles.r.patton@ieee.org>:
Brent Regan wrote:
....
Regarding COM antennas and ground plane configurations, if I may summarize:
Antenna on glass epoxy airplane without a ground plane--- BAD
Antenna on carbon epoxy airplane without a ground plane--- POOR
Antenna on carbon epoxy airplane with a ground plane inside--- OK
Antenna on carbon epoxy airplane with a ground plane outside--- BEST
I concur with your summary.
Chas
LNC2 360JM
[ and 4 correct length ground plane radials are better than
random sized mesh or conductive "paint".
If there is a remaining question, its how to test
for radiated efficiency.. a VSWR meter on the feed line,
(not, Charles proved a perfect resister would fix this)
or removing the antenna (hmm, that might be bad because
one might vibrate an internal component of the HT
at a secondary freq rather than the center freq) and
look at field strength. -Rob ]
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