On Fri, 13 May 2005 12:05:45 -0700, DaveC wrote:

On Fri, 13 May 2005 10:53:14 -0700, Jeff Liebermann wrote
(in article ):

-3dB beamwidth of the biquad is about 60 degrees. Using a protractor
to eyeball my pizza dish, it wants a 70 degree angle. Close enough.

Thanks for those numbers, Jeff. I hadn't intuited, nor could I find
confirmation of which feed would best illuminate my dish.

Bi-quad, here I come!

This might help:
http://802.11junk.com/jeffl/pics/antennas/Biquad/
It's the 4NEC2 output for Trevor Marshall's biquad design. I'll tweak
it to include a VSWR over frequency graph later.




--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558