Lex-Lutor wrote:
I'm interested in real results between this two antennas, urban area, same
power, same high etc. Running circular we have only 50% of power, compared
to normal dipole, but there are many positive feedbacks about circular
polarization in urban area!

For FM, yes, circular polarization is a very good thing. Part of it is
because the antenna orientation no longer matters; your listener can have
a vertical whip in a car or a horizontal dipole and still get good reception.

In addition there are some serious benefits in reduced multipath, many of
which really only apply if the listener has a circularly polarized receive
antenna, but some of which are of benefit even with a whip.

Is this really true?

Yes. Pretty much everyone today is running some sort of circular polarization.
The real difference is in the antenna patterns and how low the angle of
radiation is. You don't want to waste your signal by sending it out into
space or into the ground.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."