Originally Posted by Old Man Mike
Thanks! So comparing the two antennas:
CPOD = 1.72 dB gain with 19 dB rejection of opposite polarization
PinWheel = 0.92 dB gain with 12 dB rejection of opposite polarization
Of course the PinWheel is much lighter and easier to build than the CPOD.
Could I perhaps talk you into giving me the dimensions for your CPOD? I'd like to try it. By observation alone it appears to have 4 equal length 3/4 wave elements where each run is 1/4 wave before it's next turn. The feedpoint appears to be some sort of lowe pass filter? However I am wondering if there's a 90 degree phase shift in there somewhere or if you have capacitive/inductive linked system? Just trying to take a guess in hopes you'll give me the details. I will not post it without permission.