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Old December 13th 06, 12:54 PM posted to rec.radio.amateur.antenna
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Default Angle of radiation

Richard Clark wrote:
On Tue, 12 Dec 2006 23:45:42 -0500, "Jimmie D"
wrote:

I was thinking this particular antenna would have a lower radiation
angle


is unrelated to:

but I am beginning to think this may be typical of the drooping radial
1/4 wl antena.


Hi Jimmie,

The drooping radials affect match only (classically so). The relation
of the WHOLE antenna to ground is the significant predictor of
radiation angle.

73's
Richard Clark, KB7QHC


Hello Richard,

The quarter-wave ground-plane antenna's vertical radiation pattern
approaches that of a half-wave vertical as the radial droop approaches
90 degrees, while the feedpoint height remains fixed. Whether one views
that as significant is subjective, of course.

73,

Chuck, NT3G

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