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Re: 2 ghz antenna question



Chris,
 Best advice I can give is don't. Phasing and Phase centers are critical. 
Most likely you will have pulling of the patern right /left or up/down. Gain 
of this type of antenna is best obtained in a single dish or a panel type 
antenna where phasing can be tightly controlled. Look for a 6' TVRO dish.

Art,
KC6UQH
----- Original Message ----- 
From: "Chris Huber" <cahuber@ucdavis.edu>
To: <amsat-bb@amsat.org>
Sent: Wednesday, August 08, 2007 4:56 PM
Subject: [amsat-bb] 2 ghz antenna question


> Hello,
>
> I know this is off subject, I am looking for ideas on stacking 2 antennas.
> I am doing a 25 mile WiFi link on 2 GHz using 1  3 foot grid dish with
> horizontal polarity. I have a power divider and a second dish that I
> want to mount directly above the first antenna.
>
> Is the vertical spacing critical?  Is there any advantage over close
> spacing,  ie. increase gain or wide spacing to give better path fade
> protection.
>
> Thanks for your time.
>
> Chris N6ICW
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