[amsat-bb] AO-91 and circular polarization?

[Nick Hart]

If you can make the direction switchable without adding too much weight, that
can be helpful.  

We did an ARISS QSO this week and switched the polarity in the middle of it. 
It was just the best thing for that particular pass. 

------ Original Message ------
Received: Sun, 11 Mar 2018 04:49:46 PM PDT
From: Jerry Buxton <n0jy at amsat.org>
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] AO-91 and circular polarization?

Todd,

Correct is not really a consideration, the way I see it.  Will a CP
antenna work?  Yes.  Polarization should not matter for AO-92.  (BTW I
presume you mean AO-92, not AO-91 in which case L band just flat won't
work no matter the antenna, period.)     :-)

I use RHCP because I built my antenna for AO-51 and that is was in use
at the time.  I believe that when CP is used on a satellite, at least in
the AMSAT history, it has been RHCP most of the time so building for
RHCP may have advantages for future satellites.

Jerry Buxton, NØJY

On 3/11/2018 15:44, Todd W Deckard wrote:
> Would it be correct to use a CP antenna on the L-band uplink for AO-91?   If
so which polarization?
>
> Just purchased an ICOM X-2 on ebay that gets me 1.2ghz and the temps are
getting civilized so it’s about time to get back on the air ...
>
> My elev. over azimuth system is already swinging more mass than it was
geared for and i’m looking to cook up a small antenna that doesn’t add too
much straw to the camel.  
>
> I would like to go Helical just because ...
>
> if anyone has an alternate suggestion I’d listen to any and all.
>
> Thanks
> Todd
> KE0CMD
> Sent from my iPhone
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_______________________________________________
Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb