Re: NEC-LIST: Modelling wide metallic surfaces

Farhad Rachidi wrote:
>
> Does anybody have some experience in using NEC to model finite, but
> wide metallic surfaces ? The configuration we are interested to model
> is a dipole above a metallic surface of about 5 m x 5 m, at a few GHz.
> Thanks for your help.

This sounds like a problem for NEC-BSC.

In fact, it's example problem 1 in the NEC-BSC user's guide.

NEC-BSC 3.4 is available for Linux, SGI, Windows, and possibly other
platforms from Ohio State University in return for a US$300
duplication fee.

See http://esl.eng.ohio-state.edu/codes/Infnzbsc34.htm for more
details.

See http://esl.eng.ohio-state.edu/codes/Ordlst8.htm for ordering
instructions.

I've attached a copy of the NEC-BSC input file for the problem you
describe. Note that the NEC-BSC user's manual compares the NEC-BSC
output with measured data in Fig. 7.6 on p. 187.

--
Dave Michelson
dmichelson_at_home.com
--------------------
CE:  PLATE-DIPOLE - EXAMPLE 1A
UN:  UNITS IN INCHES (!)
3
US:  SOURCE UNITS IN WAVELENGTHS
0
FR:  FREQUENCY (in GHz)
8.0
PF:  PATTERN CUT
0., 0., 90., 0.
T, 90.
0., 1., 361
PG:  PLATE GEOMETRY
4, 0
0.,  3.5,  3.5
0., -3.5,  3.5
0., -3.5, -3.5
0.,  3.5, -3.5
SG:  SOURCE GEOMETRY
5.12, 0., 0.
0., 0., 90. 0.
-2, 0.5, 0.
1., 0.
PP:  PLOTTABLE OUTPUT
T
T, 5.33, 2.66
0., 360., 36.
-40., 0., 10.
XQ:  EXECUTE CODE
EN:  END CODE 
------------------------