NAME
nec2, nec2small - Numerical Electromagnetics Code (Antenna Modelling
Program)
SYNOPSIS
nec2 [INPUT] [OUTPUT]
nec2small [INPUT] [OUTPUT]
DESCRIPTION
nec2, is a versatile numerical Boundary Element Method (commonly called
Method of Moments) antenna modelling code for the analysis of antennas
and other metal structures. It solves the integral equations for the
currents induced on the structure by sources or incident fields. The
structure may either be excited by voltage sources on the structure, or
by an incident plane wave of either elliptic or linear polarisation.
The structure and excitation are described in the INPUT file and the
output is written to OUTPUT.
OPTIONS
Due to the age of the program, it expects input in the form of punched
cards fed into a hopper. It currently does not accept any options.
If OUTPUT is omitted, output is written to stdout and if INPUT and
OUTPUT are omitted then the input is taken from stdin and the output
written to stdout.
The maximum size of problem which the code can handle must be hard
coded at compile time and no dynamic memory allocation is performed.
Two versions are therefore provided suitable for different sizes of
problem, nec2 is compiled for a maximum of 10000 wire segments and 5000
surface patches, while nec2small is compiled for a maximum of 600 wire
segments and 200 surface patches.
SEE ALSO
somnec(1)
The NEC-2 code is fully documented in the report Numerical
Electromagnetics Code (NEC) -- Method of Moments" by Burke and Poggio,
which is available as a printed publication in three parts covering the
theory of operation, the program code and the users’ manual. An
updated form of the users’ manual part of this report can be found in
/usr/share/doc/nec/NECdoc
BUGS
nec2 has been superseded by nec4, but this revised code has not been
made available to the public, so it is possible that some bugs remain
in this version.
Also note that many variant source codes exist based on the original
FORTRAN-IV listing in the report. This one is believed to be correctly
working, but may still contain extra errors.
AUTHOR
This manual page was written by <alanb@chiark.greenend.org.uk>. The
program was developed by G. J. Burke and A. J. Poggio of the Laurence
Livermore Laboratory.
NEC2(1)