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Re: antenna polarisation question
- Subject: Re: [amsat-bb] antenna polarisation question
- From: Jim Walls <k6ccc@xxxxxxxxxxxxx>
- Date: Wed, 27 Apr 2005 21:35:14 -0700
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Jack wrote:
> I am building an antenna system comprising:
> 2m crossed quad
> 70cm crossed quad
> 60cm S band dish fixed RHCP
>
> Both of the quad antennas can be remote switched to V, H, LHCP or RHCP
> polarasation.
That's a good way to do it. By having H and V, you also retain the
ability to use the antennas for terrestrial use as well as satellite.
> Q: Do I need to be able to have different polarisations on the uplink as
> well as the downlink or is switching them both to the same sense going to
> work?
Yes. Have them separately switchable
> Does a bird that is being received RHCP for best signal need RHCP on the
> uplink or can it vary?
It can. Sometimes one is better and sometimes the other is better. The
uplink and downlink will not necessarily be the same...
--
73
-------------------------------------
Jim Walls - K6CCC
k6ccc@amsat.org
Ofc: 818-548-4804
http://home.earthlink.net/~k6ccc
AMSAT Member 32537 - WSWSS Member 395
----
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