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       nec2 has been superseded by nec4, but this revised code has not been made available to the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