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       nec2  has been superseded by nec4, but this revised code has not been made available to the public, so it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)