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

John B. Stephensen kd6ozh at comcast.net
Fri Jan 2 15:30:14 PST 2009

You can use a 90-degree hybrid splitter/combiner to produce LHCP and RHCP 
for two receivers. Switching will produce sidebands at the switching 
frequency and alias undesired signals into the receiver passband.



----- Original Message ----- 
From: "R. Chastain" <suenrod at yahoo.com>
To: "Amsat-BB" <amsat-bb at amsat.org>
Sent: Friday, January 02, 2009 23:15 UTC
Subject: [amsat-bb] RH and LH CP simutaniously

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 
The switching frequency would have to be high enough so as to not introduce
a tone to the signal.

Just a thought I have had for awhile.


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