On Thu, 20 Mar 2014 21:12:57 -0700, Jeff Liebermann
wrote:

http://802.11junk.com/jeffl/antennas/Discone/
http://802.11junk.com/jeffl/antennas/biconical/
I did some more tinkering with these two. Looks like the biquad also
has holes in the gain plot, but shows more gain at more frequencies
than the discone. I changed the characteristic impedance of the
biquad to 150 ohms to get a better looking VSWR. Real ground and
animated GIF's of the biconical antenna when I have more time.

Diamond D-130 discone antenna model borrowed from:
http://www.qsl.net/kp4md/modeling.htm
I don't recall where I found the biconical.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558