[amsat-bb] Re: Antenna Polarization Technical Question
kn6za at hotmail.com
Sat Aug 4 12:42:31 PDT 2012
I have also noticed the switching of polarity as the sat travels over.
What I have understood to be the mode by which this is occuring comes from the fact that circular polarized antennas change polarity as you move out of the main radiation lobe. The main lobe is circular one direction and the next lobe is reversed, and the next reversed back again.
Hope someone can correct me if I have things fouled up.
> Date: Sat, 4 Aug 2012 14:13:47 -0500
> Subject: Re: [amsat-bb] Antenna Polarization Technical Question
> From: tomdoyle1948 at gmail.com
> To: kn6za at hotmail.com
> CC: amsat-bb at amsat.org
> I believe that is true but that does not explain why the optimum
> polarity setting on the receive end would
> change during a pass. Perhaps there is some sort of Faraday Rotation
> effect but I do not believe that
> it can change the direction of the circular polarized signal but who
> knows what magic things happen in
> the ether.
> tnx & 73 W9KE Tom Doyle
> On Sat, Aug 4, 2012 at 12:44 PM, andrew abken <kn6za at hotmail.com> wrote:
> > Hi Tom,
> > I thought fo-29 was transmitting circular. Would not surprise me if I was wrong:)
> > Andy,
> > kn6za
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> Sent from my computer.
> tom ...
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