Paste below

Not totally sure of your physical concept, but the free space net patterns
of single, quadrature-fed h-pol and v-pol, 1/2 wave dipoles having
coincident radiation centers will be essentially c-pol on the planes normal
to the two dipoles, and essentially v-pol off the ends of the horizontal
dipole.

This is a common element configuration to generate c-pol in FM/TV broadcast
panel antenna arrays.

Two h-pol dipoles in a turnstile arrangement would be more omnidirectional,
in the azimuth plane.

RF

Visit http://rfry.org for FM broadcast RF system papers.

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"Richard" wrote in message
...
A turnstile is a horizontally polarized antenna. Big downer is that from
a
polar radiation POV, from the sides, it's got a minus figure. Like -2db
or
something.

Okay, flipp the turnstile so you have one dipole vertical. Not a
turnstle
anymore, and the element configuration will respond favourably to both
vertical and horizontal radiation.
But:

1) Do you have to wire up the "flipped turnstle" in a different way in
order, at the same time, (without any switching) to take advantage of:

a) mixed polarized waves?
b) vertical or horizontal waves?

2) If you put up a "flipped turstile" and you wire it up to handle
mixed,
vertical or horizontal waves, what is the polar radiation patter in the
horizontal plane (ie from the sides) ? Still a minus? clip