Re: NEC-LIST: Basis functions in NEC.

Doug, did you ever get an answer to your question? I didn't see one.

Malcolm

"D. B. Miron" <dbmiron_at_paulbunyan.net> writes:
> Good day,
>
> I have been reading the theory sections of both the NEC2
> and NEC4 manual, concerning the basis functions. I am
> beginning to think that I understand the system, so I'm
> asking the NEC experts if I'm right.
>
> In NEC2, the fundamental basis functions are a constant, a
> sine, and a cosine function. Each of these components have
> a domain of definition which extends over just their related
> segment. Now associated with segment k is a main set of
> these functions, say f_k, and a set of tail functions
> defined over each connecting segment. Each of these tail
> functions and its derivative go to zero at the end of its
> domain segment farthest from segment k. f_k and the tail
> functions have to meet current and charge continuity
> conditons at each end of segment k.
>
> For example, let's consider a 3-segment wire. On segment 1,
> there is the main function f_1, and it has a tail function
> defined over segment 2. On segment 2 there is f_2 and it
> has tail functions defined over both segments 1 and 3. On
> segment 3 the main function is f_3, and it has a tail
> function defined over segment 2. Associated with segment 1
> are six unknown coefficients and five continuity and
> boundary conditions, if the charge at the open end is left
> free. Associated with segment 2 are nine unknowns and 8
> boundary and continuity conditions.
>
> Is this right?
>
> Doug Miron
>
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