[Moon-net] 10GHz Polarisation

[Earl (Jim) Shaffer, WB9UWA]

Hi All.

I am not yet on 10Ghz, but I am far from ruling that out.
It seems the decision to go CP has already been made and
agreed to. The only thing left to do now is make a system with
the best possible circularity. What we do on 2M is to go
with an already existing convention and make the best of it.
In that case, a Linrad radio seems to be the best answer.
A Linrad radio might be a good solution on 10 Ghz in times
that circularity of the path is not optimal. My point is that
everyone should follow the prevailing convention and make
the best of it. There are already enough bands and modes 
without adding a division of polarity too. I would love to
see CP as the polarity convention on all bands. It would
certainly take the question of polarity out of the picture.
I realize that on 2M, CP will never prevail because it nearly
prevents working tropo stations on EME. This will not be the
case on microwave bands. CP is clearly the convention on
1296 Mhz and it seems to work out very nicely. On the other
hand linear polarity is used at 432 Mhz and polarity issues 
are one of the biggest challenges for working that band.
That should be a clue.

73, Jim Shaffer, WB9UWA.