http://www.enzim.hu/~szia/emanim/emanim.htm
Above link has a wonderful 3D graphic display of waves. Give it a try.
You can adjust V, H, phase, and then display sum of the 2 waves.
I use it mainly to show how circular polarization comes about.
The sum of 2 waves in the same plane ( 180 degrees rotated ), 180 degrees out of phase ( 1/2 wavelength ) is a nul which probably would be out performed by a rubber ducky.
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Greg D. Sent: October 24, 2009 7:34 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Making a Circular Polarized antenna
Hi folks,
Just curious...
One of the ways to make a circularly polarized antenna is to feed two linearly polarized antennas in-phase, but mount one them 90 degrees rotated from the other, and 1/4 wavelength ahead of it.
Couldn't one also mount the two antennas 180 degrees rotated and 1/2 wavelength ahead?
The reason I ask is that I have some flat panel 2.4 ghz "Wi-Fi" antennas, and the mounting holes work out best that way.
The only effect I can think of is that the array will probably pick up signals from both left and right polarizations, which could actually be handy.
Greg KO6TH
Windows 7: It helps you do more. Explore Windows 7. http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=P ID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen3:102009 _______________________________________________ Sent via AMSAT-BB@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