Hi, Jim.
I would agree with that, but I was only referring to feedpoint effects,
not pattern. It stands to reason that a vertical dipole would have a
lower takeoff angle than a ground plane because of the greater physical
separation of current.
73,
Dave AB7E
On 9/10/2014 11:39 AM, Jim Brown wrote:
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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|