Re: [VHFcontesting] Attenuation from polarity mismatch (Re: C6AFP Six Meter Beacon

[Warner <K1KG@verizon.net>]

The coupling between orthogonal polarizations is theoretically zero 
(infinite negative dB).  Any coupling has to do with errors in the 
orthogonality.  Reflections can introduce some polarization shift 
which will reduce depth of the null.  Antenna tilt is often used to 
mitigate against the null and a 45 degree difference will result in 3 
dB (half power) coupling loss.  On six meters, the tropospheric and E 
layer (meteors) will result in very little polarization rotation 
which is a different situation than most HF propagation which passes 
through more ionized regions before returning to the surface.
Hope this helps.

-Warner K1KG 
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