View Single Post
Old Nov 21, 2011, 07:57 AM
ExperimentalAir is offline
Find More Posts by ExperimentalAir
Ed @ Experimental Airlines
ExperimentalAir's Avatar
United States, AZ, Phoenix
Joined Sep 2011
463 Posts
CP interference from double-reflection?

I have a really esoteric question about circular polarization.

I made a right-hand SP receiver and CL transmitter antenna pair for 5.8gHz, mounted inside a foamboard fuselage tube and flying within 300m. They work phenomenally in the confined and RF-busy urban area where I fly.

There is still one zone on my field where I consistently get interference that seems to be at the focal point between a large 12' freeway noise abatement wall and the side of a Costco (also huge, of course) oriented at 90 degrees to one another.

Is it plausible that some of the transmitted reflection off each large surface is being reverse-polarized and then re-polarized by the other, causing a big multipathed correct-polarized signal back to the receiver?

I'm familiar with this bounce-bounce principle with certain optical systems, like prismatic reflectors, but am curious if it applies to circular polarization.

Otherwise the antennas work fantastically! Thanks Alex!

Ed
ExperimentalAir is offline Find More Posts by ExperimentalAir
Reply With Quote