"-.-. --.-" wrote in message ...

"Dave" ha scritto nel messaggio
...

a quad is generally linearly polarized, either vertical or horizontal.
to get circular polarization you need dual driven elements with the
proper phasing.

Like a calculated piece of coax used to drive the 2nd element 90
electrical degrees after the first ??

-.-. --.-

Hi MG

It isnt at all so simple as feeding one radiator 90 degrees later than
another to get "circular" polarization. For instance two linear radiators
can be fed in phase to get "CP". And two linear radiators can be fed with
one 90 defrees earlier (or later) than the other.
Look at wikipedia http://en.wikipedia.org/wiki/Circular_polarization

I'd expect that you can feed two Quads in phase to get CP along the axis
of their mounting boom. You'd space them appropriately and conect their
fed points appropriately.

Jerry KD6JDJ