[AK-VHF] which polarity is preferrws for long-range VHF/UHF/mw shots

[Paul Kiesel]

 So, if the state of affairs in a certain area is that antennas are vertically polarized, then it makes sense to change them to be horizontally polarized. Weak signal enthusiasts using vertical polarization might do well if they consider doing this. Gotta convince everyone to do it, though.

73, Paul K7CW / VE7IB

    On Thursday, June 16, 2022 at 03:55:30 PM PDT, Ed Cole <kl7uw at acsalaska.net> wrote:  
 
 I thought this was an interesting answer why horizontal polarity is 
chosen as standard for weak-signal VHF and up operation:

"Yes polarization is maintained under clear free space paths. 
Reflections off of angled structures can cause polarization rotation. 
Propagation through magnetically biased plasma (the Ionosphere) result 
in polarization rotation."

**This is called Faraday rotation for satellite and eme signals**

"Reflections off of surfaces that have the same orientation as the wave 
tend to reflect more efficiently. This is why horizontal polarization is 
preferred for paths beyond the horizon. Troposphere bending is greater 
when the waves electric field is is in the same plane as the boundary.

Brian
WA6QDP"

73, Ed - KL7UW
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