Jim:

Hi, thanks for the inputs...

[snip]
If you need more, fork out the bucks for a FEM code that does what you
need.
[snip]

OK, I have a client who can underwrite such software, do you have a
recommendation
for a particular product?

[snip]
As you say, you've not researched it.

I would suggest that the need for such a thing is fairly small, but I'll
bet someone somewhere has done it, just not as a "end user" software
product.
[snip]

I agree, there are certainly several "commercial" high priced muliti-physics
software packages
available on the market that cost 10's of thousands of dollars per 'seat',
and... I'll bet that there
are a few more "in-house" packages developed within the defense industrial
community.

[snip]
Certainly, there IS a lot of modeling of EM waves from moving objects
(radar reflections being of particular interest).
[snip]

Yep I believe that might be so, again... do you have any specific
recommedations?

[snip]
Depends on the relative scales, too. If you're talking waves from a meter
scale object viewed from kilometers away, then using a point source
approximation for the object will work nicely, and then it's just simple
geometry.
[snip]

For the present investigation, I only need the capability to simulate
antennas that
rotate very fast...

Thanks!

-- Pete K1PO
-- Indialantic By-the-Sea, FL