[amsat-bb] Re: CP antenna from 2 WiFi panels
jbelstner at yahoo.com
Mon Jun 7 15:37:05 PDT 2010
The HG2414P is a linearly polarized patch.
The HG2409PC is a circular polarized patch (LH or RH available).
They are about the same price too.
On Jun 7, 2010, at 3:23 PM, i8cvs wrote:
> ----- Original Message -----
> From: "John Belstner" <jbelstner at yahoo.com>
> To: "Greg D." <ko6th_greg at hotmail.com>
> Cc: <amsat-bb at amsat.org>
> Sent: Monday, June 07, 2010 4:37 PM
> Subject: [amsat-bb] Re: CP antenna from 2 WiFi panels
>> Hi Greg,
>> These panels are patch style antennas and as such you will not be able to
> place one behind the other to obtain circular polarization. Placing one
> next to the other will at best produce an elliptically polarized pattern,
> and you should use a 50 ohm splitter to keep your impedance 50 ohms. The
> shape of the patch and position of the feed point is typically how you
> obtain circular polarization with a patch antenna.
>> Or, you can obtain RHCP with the same or more gain and less trouble by
> making a Helix. A sheet of aluminum, #8 copper wire and and a piece of PVC
> of the right diameter is all you need.
>> Or, you can try just a single panel and see how it performs for a while.
>> Good luck!
>> 73, John W9EN
>> W9EN at AMSAT.ORG
> Hi John, W9EN
> I would like to know if these panels are patch style antennas linearly or
> circularly polarized.
> 73" de
> i8CVS Domenico
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