Frank schreef:

I agree with Dave's comments. The only way to optimize an antenna
array is
to run successive NEC models. If you are really serious about this I

suggest a copy of "Field Computation by Moment Methods" by Roger F.
Harrington. Don't buy it, just check it out at a university library,
and
see what you think. There is also "Finite Element" analysis, which
is
implemented in Ansoft's HFSS program (www.ansoft.com).


To get an idea of how this could be done by using both a gradient-style
optimizer (like AO) or a genetic-algorithm based optimizer do a google
for 4nec2 and try yourself.

Arie.