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Old Feb 11, 2011, 07:59 AM
IBCrazy is online now
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Amherst, VA
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Quote:
Originally Posted by Old Man Mike View Post
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.

OMM
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.

-Alex
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Last edited by IBCrazy; Feb 11, 2011 at 09:02 AM.
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