[TowerTalk] More fun with ground plane modeling
Jim Brown
jim at audiosystemsgroup.com
Wed Sep 10 14:39:55 EDT 2014
On Wed,9/10/2014 11:22 AM, David Gilbert wrote:
> If you think of an elevated ground plane (elevated high enough to
> minimize ground coupling effects) as a vertical dipole with the bottom
> portion splayed out (which is pretty much what it is functionally),
Not quite, Dave. A vertical half-wave dipole puts more of its power into
low angles than does a quarter wave antenna. I've done a couple of
modeling studies to show this, to study the effect of mounting height,
and to compare verticals and horizontal antennas at various mounting
heights.
http://k9yc.com/VerticalHeight.pdf and
http://k9yc.com/VertOrHorizontal-Slides.pdf
73, Jim K9YC
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