[amsat-bb] Re: Ant in QST

G0MRF@aol.com G0MRF at aol.com
Wed Jul 15 16:00:01 PDT 2009


In a message dated 15/07/2009 21:52:06 GMT Standard Time,  
nr5ajerry at gmail.com writes:

Has  anyone seen the antenna for 2m in this monthsQST p. 30. Its  a
omnidirection sorta a double diamond turnstile. I was wondering  how
this woould work for the LEO Sats??  Would think it would be  simple to
scale it down for 435??

I did see that, but it has very low angle radiation probably with a deep  
null at higher angles.
It's advantage was that it has horizontal polarisation.
I can't help but feel a quadrifilar helix would be better There are some  
designs out there and there is also an online calculator for the  dimensions 
for a frequency of your choice.
David  G0MRF


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