[amsat-bb] Re: RH and LH CP simutaniously

R. Chastain suenrod at yahoo.com
Sat Jan 3 19:27:18 PST 2009

>From what I have read from people with switchable RHCP/LHCP, they can switch to the other polorazation to combat fading. Wouldn't doing this at a fast rate accomplish the same goal?
I admit my antenna theory is very weak and surely someone would have considered this long ago.
--- On Fri, 1/2/09, Nigel Gunn G8IFF/W8IFF <nigel at ngunn.net> wrote:

From: Nigel Gunn G8IFF/W8IFF <nigel at ngunn.net>
Subject: Re: [amsat-bb] RH and LH CP simutaniously
To: "R. Chastain" <suenrod at yahoo.com>
Cc: "Amsat-BB" <amsat-bb at amsat.org>
Date: Friday, January 2, 2009, 6:28 PM

Would effectively cause a 3dB loss of antenna gain as seen by another circularly
polarised antenna as the receiving end would receive negligable signal 50% of
the time.

R. Chastain wrote:
> Hi all,
> ��� Has anyone ever considered the possibilty of using PIN diodes
and a free running square wave oscillator to electronically switch between RHCP
and LHCP?
> The switching frequency would have to be high enough so as to not
> a tone to the signal.
>> Just a thought I have had for awhile.
>> RoD
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Nigel A. Gunn. G8IFF   W8IFF (was KC8NHF)
1865 El Camino Drive, Xenia, OH 45385-1115, USA   937 825 5032
e-mail nigel at ngunn.net             www  http://www.ngunn.net Member of  ARRL,
GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pig #385,
                 Dayton ARA #2128,  AMSAT-NA   LM-1691,  AMSAT-UK, MKARS,  ALC


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