[amsat-bb] modeling qha

[Wallace Strom <kg4yuw@xxxxxxxx>]

Hello,

This might be off topic but...

I have been trying to model a Quadrifilar helix antenna with MMANA and
EZNEC 3.0 demo without much luck.  The pattern breaks down when I model
the antenna at 6 meters above ground.  I have modeled W3KH's antenna and
Steve Blackmore's "Tall narrow QHA" - both have nulls at the lower 30
degress(0-30 , 180-150).  Any help would be appreciated.


73,
Wally
KG4YUW



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