To Bill Turner,

my tests showed no difference between Horizontal and Vertical propagation.
Vertical is quite busy here, lots of interference. Horizontal, on the other
hand plays much better.

My question was antenna design, not the propagation issues. Thanks for
trying though.

Andrey



"Dale Parfitt" wrote in message
news:mIs_c.2344$vI2.712@trnddc02...

"Bill Turner" wrote in message
...
On Sat, 4 Sep 2004 14:57:09 -0700, "Andrey"
wrote:

Greetings to all the antenna experts here!
I want to create horizontally polarized antenna, low profile, located
above
large ground plane. And I need it to be omnidirectional (sort of) and
have
sufficient gain in horizontal plane.
My frequency of interest is 900 MHz. The ground plane is a roof of a
car.
I tried loops, from 50 to 300 mm diameter, radiation goes up if I mount
it
above the ground plane.
Any ideas?
Thank you,
Andrey

__________________________________________________ _______

FWIW, horizontal polarization at 900 MHz won't get you far. Vertical is
preferred because horizontal is rapidly absorbed by ground loss. On the
other hand, if you don't *want* to get very far, use a vertical and just
reduce power.
This will be sad news to all the V/U weak signal ops who have
consistantly
covered long distances using horizontal polarity.

Dale W4OP