Hi Joe K0VTY and Gary WE9Y In a separate email I have sent to both of you few photograph of my lab set-up for circularity measurements using a rotating dipole against a LHCP steady 3.5 turns helix feed for 2400 MHz under test.
Also I have added the radiation diagram for a G3RUH type patch feed for 2400 MHz made with the same set-up when the patch is azimutally rotated by +/- 90° and is illuminated by the steady horizontally polarized dipole. If someone is interested to see the above set-up for microwave please let me know off line. 73" de i8CVS Domenico ----- Original Message ----- From: "Joe v Murray" <k0...@juno.com> To: <gary.r...@sbcglobal.net>; <amsat-bb@amsat.org> Sent: Friday, June 11, 2010 2:42 AM Subject: [amsat-bb] Re: [Mw] Fwd: Power splitters-errors circularpolarization? > Hi Gary > > Any good suggstions on how to keep the axis of the rotating dipole > lined up with the axis of the CP antenna in the far field? > > Thanks > > Joe Murray K0VTY > ==================== > On Thu, 10 Jun 2010 17:24:55 -0700 (PDT) Gary K Reed > <gary.r...@sbcglobal.net> writes: > > To measure axial ratio, why not rotate a dipole in front of the yagis > > (or other antenna) , and measure the signal strength. If the axial > > ratio is 1 then there should be NO change in signal strength as the > > dipole is rotated. It would necessary to stay in the far field. > > > > Or have I been working too long today? > > > > Gary WE9Y _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
