[Ground-station] Balloon Launch - experiments?

[KENT BRITAIN]

The only guys who seem to consistently get close to CP are theEME lads getting their feeds checks.   Most have good Axial Ratio,but Left vs Right .... is another issue entirely!     CP reverses when itbounces off the dish, the reverses again when it bounces off the moon,then again when it bounces off the other guys dish.     Some monitoringby a BIG dish says that 20-30% have the wrong CP.

Fortunately the moon is a very rough surface and doesn't preserve polarizationvery well.   

Back to work, got a 5.5 GHz phased array for Space W to finish this week.(Yes, CP, and even after using the high dollar simulators I have to tweakit on the antenna range.)


      From: Phil Karn <karn at ka9q.net>
 To: KENT BRITAIN <wa5vjb at flash.net>; Zach Leffke <zleffke at vt.edu>; "ground-station at lists.openresearch.institute" <ground-station at lists.openresearch.institute> 
 Sent: Monday, April 23, 2018 2:26 AM
 Subject: Re: [Ground-station] Balloon Launch - experiments?
   
On 4/22/18 23:51, KENT BRITAIN wrote:
> No, most are looking for something with some gain.
> 
> It would be really fun to fuild a 5.6 GHz version of one of those.
> Microscope suggested!

Well, I'm not an antenna guy but it seems to me that "gain" and
"omnidirectional" are kinda mutually exclusive.

But are we limited to just one transmitter and antenna?

Phil



   
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