[amsat-bb] Re: AO-51 - After the Change

Clint Bradford clintbrad4d at earthlink.net
Sun Dec 6 23:01:54 PST 2009

Art - What you wrote (and correct me if I misinterpreted) is that me -  
and others with mere handheld Yagi antennas - are achieving better  
results on the FM birds than those with more sophisticated linear  


On Dec 6, 2009, at 10:31 PM, Art McBride wrote:

Rotating a linear polarized Yagi in a circularly polarized field should
result in less than a few dB of change, no change if the circular  
antenna is
perfectly circularly polarized. When using a linear antenna ground  
including reflections will cause a larger change. Using circular on both
ends will result in less fading from the ground effects and no change in
signal for antenna rotation on the S/C side providing the S/C antenna  
has a
good pointing angle. Losses of 22 +dB are reserved for cross  
polarization of
antennas H-V and LH to RH.

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