[amsat-bb] 4 omni antennas plots (nulls)
bruninga at usna.edu
Thu Mar 17 14:01:34 UTC 2016
> ANY antenna above ground, has multiple lobes.
> You can simulate this with any program like MMANA or EZNEC...
Yes, and that is my point too.
To get the good gain at medium elevations from an omni, one need a large
ground plane (screen, not radials) going out several wavelengths in all
directions. In my emails I talk about being over a metal roof or large
chicken wire ground plane to properly hide the real ground reflections and
to block energy going down (which lose 3 dB) and hence all those high
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Roland
Zurmely via AMSAT-BB
Sent: Wednesday, March 16, 2016 6:30 PM
Subject: [amsat-bb] 4 omni antennas plots (nulls)
Hi Bob WB4APR,
ANY antenna above ground, has multiple lobes.You can simulate this with
any program like MMANA or EZNEC...
73 de Roland PY4ZBZ
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