NEC-LIST: NEC2 basis functions again.

Good day Jerry,

Your last message, about changing the current
representation, misdirected me (unintenionally, I'm sure) to
look at the subroutine CABC. Not being generally familiar
with the code, I could only see that some A, B, C,-related
vectors are being recalculated. It struck me while
re-reading the section above eq. (67) that, of course the
total current on a segment can have the same three term
representation because all the component main and tail
functions that have the segment as a domain have this form.
Therefore, the coefficients for the three-term total current
are just the sums of the corresponding coefficients of all
the basis function components for that segment.

I have another problem with the theory presentation. The
current-continuity equations (41) and (42) are said to lead
to a solution for the Q_i^(+/-) values. If I differentiate
these equations and substitute the a_(i or j) Q_i values
given for the derivatives earlier, the Q_i values factor
out. Also, if the wires all have the same radius, I get
N^(+/-)=1. I am assuming that the definition for the
a_j^(+/-) items is the same as for the a_i terms. What am I
missing?

Regards,
Doug Miron

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