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Old Mar 13, 2011, 09:38 AM
IBCrazy is offline
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Engineer for Christ
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Amherst, VA
Joined Jun 2006
11,092 Posts
I like that sand idea! What a great way to keep it from kinking up!

I have not done anything more with the quadrafiliar helix, and I probably won't. It is extremely difficult to build and doesn't seem to have any advantage over any other type of antenna. It is a cool looking design, but the radiation pattern is suited for high altitude and that's about all.

Old Man Mike discovered that if you flip two skew-planar wheels and spaced them 1/2 wave apart, 180 degrees out of phase, you get a great moderate gain omni directional antenna. Granted it's complex, but it's easier than the Quad helix.

-Alex
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