NEC-LIST: Crossing of wire segements

From: Rian Sanderson <rsanderson_at_email.domain.hidden>
Date: Fri, 9 Jan 2004 19:59:06 -0800 (PST)

How firm is the crossing of segments restriction in NEC-2? From page 9 of
the NEC manual it states:

"Segments (or patches) may not overlap since the division of current
between two overlapping segments is indeterminate. Overlapping segments
may result in a singular matrix equation."

I took this to mean: if segments cross the simulation probably won't be
able to compute. If it can compute, it will.

I hope it doesn't mean what it probably does: crossing segments leads to a
completely invalid simulation.

I've used genetic programing and NEC-2 to synthesize an antenna. My approach
minimizes crossed segements, but they still ocurred in my final results. I
want to know if my results are valid. I'd replace the junction by hand with
more segments, but I'm already at the minimum suggested segment size for my
wire radius and excitation frequency.

Thanks for you help,

Rian Sanderson

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Received on Sat Jan 10 2004 - 03:59:30 EST

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