tom wrote:

Jeff

I hate to support Art, but he did give the endpoint data in picture6. I
modeled it with eznec+ 5 and the pattern and gain are reasonably close
to what he shows in the other "pictures". Close considering he appears
to be using mininec and if he includes conductor loss and real ground
it's off a fair amount (I show 9.36 dBi gain). I didn't run circular,
and doubt that it has much in the way of circularity, which is kind of
obvious from the elements. Even though they are skewed in a way which
he probably patented.

tom
K0TAR

Picture6 data show equal horizontal and total gain, which means it's
purely horizontally polarized in the direction of the analysis. That's
also consistent with equal CW and CCW (or right and left hand) circular
components, which mean polarization (again in the direction of the
analysis) is purely linear.

Roy Lewallen, W7EL