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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       nec2 has been superseded by nec4, but this revised code  has  not  been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.