Tonight I went to a presentation on Antenna Modeling
by Greg Algieri, WA1JXR at the April meeting of the
Algonquin Amateur Radio Club.
The presentation led you to believe that it doesn't take
a "Rocket Scientist" to do antenna modeling with EZNEC.
(An on-line Antenna Modeling presentation by WA1JXR}
EZNEC Antenna Software - free demo software
NEC software for Mac OS
MMANA Antenna Modeling Program Tutorial
Antenna Modeling with L. B. Cebik, W4RNL
Cebik on Some Antenna Modeling Programs