> In reference to below, what would be the real advantage to
> using CP antennas in addition to the V and H you'd have
> already? Any signal that arrives will excite a V and/or H
> antenna according to it's arriving polarization, and I don't
> see where CP would be a help.
If you're going to
The reason FM stations transmit circular polarization is to accommodate
both horizontal and vertical receive antennas. Most fixed receivers are
horizontal and most cars are vertical.
You can not transmit both horizontal and vertical polarization at the same
time. Feeding a horizontal antenna an
> Yes, CP does cause more multipath esp. in urban environments.
> Turns out there are a large number of buildings the
> preferentially reflect V better than H. CP gives V energy
> othwise lacking (mostly) in a strictly H xmt situation. What
> you get with strictly H pol. is quite a glorious
--- On Mon, 8/24/09, Jeff DePolo wrote:
From: Jeff DePolo
Subject: RE: Re: [Repeater-Builder] Diversity FM reception
To: Repeater-Builder@yahoogroups.com
Date: Monday, August 24, 2009, 9:32 PM
> Yes, CP does cause more multipath esp. in urban
>environments.
>
> Well, just turn your 2m handie talkie even with a rubber
> ducky on its side & note the drop in signal strength. Cross
> polarization losses, e.g. linear V to linear H (or vice
> versa) can be up to 30 dB!
In the absence of multipath, or more correctly, obstructions causing
reflections that
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