archive: SETI Helix antenna formulas-

SETI Helix antenna formulas-

MarcusJohn@aol.com
Sun, 20 Sep 1998 00:06:03 EDT

I wrote a spreadsheet (xls version 4) for the helix antenna formulas from the
website: www.mindspring.com/~nzkiwi/helix.html. The half power beam width
doesn't make sense. It gives 0.15 degrees for the HPBW, both on the website
and on my spreadsheet. Does anyone have the correct formula?

Thanks,

John Marcus.
KE3SW