Interesting. Does this really maintain circular polarization throughout
the hemisphere, or does it become elliptical or linear in some directions?

Roy Lewallen, W7EL

Jerry Martes wrote:
Hi Roy

I have tried to locate someone in the commercial level of antenna
development to "show off" what I have uncovered with this hemispheric
coverage antenna concept. I have no interest in making money with this
concept. But, I am proud to have developed it.

It would wrong for me to say that this concept is any better than a Quad
Helix for anything except NOAA satellite imaging. Its main superiority is
its sensitivity to signals at the horizon, and thats no more than 6 dB.
A major benefit associated with this design concept is it's being non
critical to manufacturing tolerances. So, I thought it would be
interesting to guys who build their own APT antennas.

The concept is -- an array of two pairs of 1/2 wave dipoles spaced about
1/4 wave apart and tilted slightly from vertical. One pair is fed in phase
with each other. The other pair is also fed in phase with each other, but
90 degrees later than the other pair.

Jerry