His recommendations do not apply since we are not talking about ground-based
antennas!
To: towertalk@contesting.com
cc: (bcc: Tyler G Stewart/BENN/CEC)
Subject: [TowerTalk] Triband tests
Dave and Ty mentioned using vertical polarization for triband tests. This is
usually NOT recommended for HF antennas on a ground-reflection range using the
gain-transfer method. As stated in the IEEE Std 149-1979 (Test Procedure for
Antennas), page 101:
"It is not practical to employ vertically polarized gain-standard antennas for
this purpose [87], since the power gain of such antennas at low elevation angles
is low, and varies drastically with the moisture content of the ground."
[87] FITZGERRELL, R. G. Limitations on Vertically Polarized Ground-Based
Antennas as Gain Standards, IEEE Trans. on Antennas & Prop. (Communications),
vol. AP-23, Mar 1975, pp 284-286.
73 Roger WB0DGF
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