Richard Clark wrote:
On Tue, 31 Mar 2009 22:27:57 GMT, Owen Duffy wrote:


By these two, it would seem that modeling coaxial components in NEC is
intractable and claims applied to their use will only be
proven/disproven in the lab or the field.


Depends on what you want to do with modeling coaxial components. A wire
to represent the (radiating)outside, and an appropriate NT or TL to
represent the (non radiating) inside works fairly well.

If you actually want to model the cable itself (including the fields
inside), I suspect it won't work so well. MoM codes in general often
don't deal with modeling the fields inside closed boxes very well.

I suspect that the cases where it doesn't are basically in the category
of things that MoM codes don't do well with in general, and you need to
go to a different kind of model (FDTD? etc.)