Jon Kåre Hellan wrote:
Jim Lux writes:


Here's the reference to the paper by Burke:
Title: Recent advances to NEC (Numerical Electromagnetics Code):
Applications and validation
Authors: Burke, G. J.
Affiliation: Lawrence Livermore National Lab., CA.
Journal: Presented at the Conference on Modern Antenna Design Using
Computers and Measurement Application To Antenna Problems of Military
Interest, Ankara, Turkey, 19-20 Oct. 1989
Publication Date: 03/1989


Thanks.

Recent advances, dated 1989.

What's been going on during the 18 years since then? Polishing NEC-4,
and developing other codes for specialized purposes, presumably. I
know it's a big question, but maybe somebody here can tell us
something.

That's about it. NEC-4 is sort of about as good as you can get for a
"wires" based MoM code. The math isn't changing, the implementation does
the math, etc.


These days, it's other modeling techniques that are being developed:
various FDTD schemes
various voxel based schemes
all manner of harmonic balance

lots of work on automatic meshing (i.e., take the mechanical solid model
from Unigraphics or Pro/E or Solidworks or whatever and turn it into
something that a EM code can process)







73
LA4RT Jon, Trondheim, Norway