NEC (Numerical Electromagnetic Code):          last update: 2/7/97


All files with .Z prefix compressed with UNIX compress

NEC Source Code and Executables:
----------------------------------

NEC2_Mac_.hqx.Z
               NEC2 executable for the Macintosh (in compressed .hqx format)
               from Barry Newberger ([email protected])

NEC2_Mac_README.txt
               Document file for Mac version of  NEC2

nec-pc.zip
               NEC2D executable compiled to run on PC 386/486
               Compiled with 32-bit Lahey Fortran. Requires
               80x87 math coprocessor. File contains 4 versions
               compiled for different maximum numbers of segments
               and hence require differents amounts of memory
               Includes SOMNEC2D.EXE Sommerfeld parameter
               generator.

                  Name of      Max number   Approximate
                executable   of segm.     memory use (MB)
              - - - - - - - - - - - - - - - - - - - - - -
                NEC2D.EXE        256        1.5 (*)
                NEC2D512.EXE     512         5
                NEC2D960.EXE     960        16
                NEC2D1k4.EXE    1392        32

               (updated 1/22/96)
               from Jozef Bergervoet ([email protected])



nec-pc-x.zip

               This zip-file is a supplement to nec-pc.zip. It contains
               larger versions of the NEC executable, for problems with
               more than 1392 segments. They can only be used together with
               NEC2D.EXE, from nec-pc.zip.

Description of the NEC2D files:
--------------------------------------------------------------------------

EXAMPLE.DAT    is an input file with several examples. These can be tested
              in one single run by giving this file as input.

NEC2D***.EXE   Several working version of the NEC program. Differences:

                 Name of      Max number   Approximate
                 executable   of segm.     memory use (MB)
              - - - - - - - - - - - - - - - - - - - - - -
            /    NEC2D.EXE        256         1.5 (*)
These are  |     NEC2D512.EXE     512         5
found in   |     NEC2D960.EXE     960        16
nec-pc.zip |     NEC2D1K4.EXE    1392        32
            \    NEC2D1K9.EXE    1950        60
            /    NEC2D2K8.EXE    2800       122
These files |     NEC2D4K.EXE     4000       247
 are in    |     NEC2D5K7.EXE    5700       500
nec-pc-x.zip|     NEC2D8K1.EXE    8100      1006
            \    NEC2D11K.EXE   11000      1852

              (*) NEC2D.EXE should be in the directory from where you run
              the other executables, it is the only one that contains the
              DOS-extender. The others borrow it from NEC2D.EXE.

SOMNEC2D.EXE   is used to generate SOMMERFELD parameters in advance. It is
              only needed for jobs that use it, e.g. some of the examples
              in EXAMPLE.DAT. Before running those jobs, SOMNEC2D should
              be called (see NEC documentation.) Input for example jobs:
                4 .001 10 1
              It makes the files: SOM2D.OUT (ascii) and SOM2D.NEC (binary)
              that are later used by NEC2D. In that case NEC2D creates a
              further file NGF2D.NEC (binary.) SOMNEC2D.EXE is found in
              nec-pc.zip.

F77L3.EER      Contains the text for Fortran error messages (nec-pc.zip.)

*.FOR, *.INC   Files containing the Fortran source code. In nec-pc-x.zip
--------------------------------------------------------------------------

Jos Bergervoet,
[email protected]
[email protected]



nec2pc.zip
               NEC2 executable for DOS. Runs on 286 or better
               processor. Requires math coprocessor.
               from Malcolm Packer (from [email protected])


nec2.sun4.dl.Z
               SUN4 executable (dynamically linked) of NEC2
               compiled for 1000 segments (Modified for interactive
               input/output filename specification)
               from Weston Beal ([email protected])


nc2s1500.sun4.Z
               SUN4 executable (statically linked) of NEC2
               compiled for 1500 segments
               from John Boyer ([email protected])


nec2.rs6000.Z
               IBM RS/6000 executable of NEC2. Runs under AIX 3.2
               from Doug Braun ([email protected])

nec2.rs6000_readme.txt
               Document file for RS/6000 version of NEC2


nec81.tar.Z
               Fortran 77 source code for nec-81. (modified for
               3000 segments) (Previously listed as nec3, but renamed to
               alleviate confusion with the real nec3.)
               (from  Petri Kotilainen OH3MCK)

nec81.readme.txt
               Readme file for nec-81  modeling program.


nec2_src.tar.Z
               Fortran source code for NEC2

nec2.in.c.tar.Z
               NEC2 source code in C. Converted from Fortran
               with f2c.
               (from ucsd.edu archive)

nec2.linux.Z
               NEC2 executable for Linux. Compiled with g77
               from Jim Cronin N2VN ([email protected])

nec2.linux_src.tar.Z
               NEC2 source code in Fortran hacked to compile with 'g77'
               Contains nec2a.f and secnds.f (a dummy version of secnds)
               Builds with the following command line under Linux:
               g77 -o nec nec2a.f secnds.f
               from Jim Cronin N2VN ([email protected])


nec2.hpux.Z
               NEC2 executable for HP 700 series workstation
               running HPUX version 9.02
               from Charlie Panek ([email protected])

nec2.hpux.f.Z
               NEC2 Fortran source code for HPUX version.
               This code was modified from nec2_src.tar.Z
               found in this archive to be compatible with
               HPUX version 9.02
               from Charlie Panek ([email protected])


nec2.hpux.txt
               Short text file describing the changes made
               to original FORTRAN source code to make it run
               under HPUX.
mininec3.zip
               BASIC source code and DOS executable for mininec3
               from NOSC

mininec_help.txt
               Help file covering the use of the Mininec antenna
               modeling program. Of particular use to those not
               having access to a copy of the Mininec manual.
               (contributed by Jeff Jones AB6MB, [email protected])

mininec_doc_sources.txt
               A short text file giving document #'s and order address
               for MININEC documents.


NEC Utilities and Related files:
------------------------------------

nec2_manual_pointer
                File describing on-line NEC2 manual at
                URL  http://www.dec.tis.net/~richesop/nec/

nec_param_util.Z
                 Perl script to create NEC input files from parameterized
                 physical descriptions.
                 from  Doug Braun ([email protected])

nec_post_processor.Z
               Creates polar plots from NEC output.
               MS Quick Basic source code.
               from John Boyer ([email protected])


jgraps.zip
               Reads NEC output files and plots radiation patterns.
               Written in Visual Basic and runs under Windows 3.1
               in a PC DOS environment. (Revision 1.5 of 5/12/94)
               written by John Boyer ([email protected])


necdraw.zip
               DOS utility for verifying correctness of NEC models. Checks
               adherance to rules and provides 3-D display of model.
                    (from ACES archive)

nec_hist.txt
              Article from the ACES newsletter outlining the history
              of the various versions of NEC.

eam_demo.zip    EAM (electromagnetic antenna modeling) demo by
               SAIC (Science Applications International Corp.)
               Runs under Windows 3.1 (DOS).
               EAM is a graphical user interface to NEC and BSC.
               Demo version has limited capability but allows
               visualization and inspection of small to medium
               size input deck and output files.
               (from [email protected])

nec-win.zip     Demo version of NEC-WIN Basic from Paragon Technology,
nec_docs_order_info.txt
               Provides info on ordering official NEC2 documentation
               from the government.


wiregrid.zip    WIREGRID is a NEC2 pre-processor for DOS PC's that
               was developed for modelling metallic structures using
               a mesh of wires. It has powerful automatic facilities
               for controlling the density of the mesh once the structure
               has been broken down into a number of polygons. It can
               also be used as a general NEC2 pre-processor. It was
               originally written by C.F. du Toit. Note that the code
               uses its own data format, and unfortunately CANNOT import
               an existing NEC2 model file, but it can of course export
               the model to a standard ASCII file. A description of the
               pre-processor has been accepted for publication: "WIREGRID:
               A NEC2 preprocessor", C.F.du Toit & D.B.Davidson, Applied
               Computational Electromagnetic Society (ACES) Journal.
               (To appear.)  A draft version of the paper (minus
               illustrations) is contained in the ZIPfile. The code was
               compressed using PZKIP version 2.04g.
               (wiregrid.zip Version 4.00 A now online 9/8/94)

               from Dr. D.B. Davidson ([email protected] )




wg_211.zip
               WireGrid for Windows  is a NEC pre-processor for modelling
               metallic structures using a mesh of wires. WireGrid AUTOMATES
               the DISCRETISATION of conducting surfaces (polygons) in terms
               of wire meshes for analysis in NEC, and allows VISUAL FEEDBACK
               of the model structure as well as the positions of sources,
               networks and field points. It also does CHECKING regarding
               duplicate wires and closely spaced nodes not making contact.

               WireGrid for Windows (version 2.11) is the second release of
               this NEC pre-processor. WireGrid was developed by EM Software
               & Systems in collaboration with the University of Stellenbosch.


               (Note: the version on the this ftp site is enabled in the
               DEMO mode. It is fully functional but limited to 15 elements.)

               from Dr. F.J.C. Meyer ([email protected] )



nec_examples.txt
               This collection of NEC2 input data files is provided
               courtesy of the Internet and Raymond Anderson. These input
               files may be used for the NEC-PC programs, I've tried them
               on both, but have been using NEC2D primarily. NEC2D was
               provided by Jozef Bergervoet. I tried to give enough
               examples so that the control cards for input would be self
               explanatory. Also most types of antennas have been included
               such as log periodic, monopole, rhombic, deltaloop, Quad and
               the YAGI. These files are easily adapted and modified with
               the DOS edit function,  using the search and replace features.
               Good Luck on your antenna designs- Clyde Edgar WA6DCM

               from Clyde Edgar WA6DCM <[email protected]>

somnec.tar.Z
               This file contains the FORTRAN source code for the
               SOMNEC utility described in the official NEC2
               documentation, as well as a sample output file
               and a brief text file containing a general discussion
               of the program.The SOMNEC program generates grids used by
               the NEC2 program for the Sommerfeld-Norton approximation
               to realistic grounds.

               contributed by George Christianson <[email protected]>

somnec_readme.txt
               This is the text file contained in somnec.tar that
               provides a general discussion of the program.

               contributed by George Christianson <[email protected]>

gamtoz.zip
               GAMTOZ is a program to convert MicroSmith .GAM files (such as
               produced by ELNEC and EZNEC as well as by MicroSmith) to comma-
               delimited files containing impedance values. Both source code
               (GAMTOZ.BAS) and a compiled (DOS) version (GAMTOZ.EXE) are
               included. (This copy virus free!)

               from Roy Lewallen W7EL



lpcad23.zip     LPCAD23 is a program to design log-periodic antennas. Antenna
               specifications are input and the program calculates the
               physical lengths and spacings. A NEC or NEC for Wires input
               file is then automatically created..
               (New version Rev 2.0 replaces version 1.37 with bug fixes
               and enhancements as of 1/29/96)
               (Version 2.3 replaces version 2.0 as of 4/10/97
               (contributed by the author Roger Cox WB0DGF)
               <[email protected]>

nv.zip
              NEC geometry viewer. Written in QuickBasic 4.5 .
              Includes source code. Allows visualization of a
              structure described in a NEC input file. Has rotate
              about all three axis and zoom capability.
              (contributed by David de Schweinitz (dave.des@metronet)


nov.zip        NEC output current viewer. Written in QuickBasic 4.5
              source code included. Allows visualization of
              geometry and the current in each segment. Has rotation
              and zoom capability.
              (contributed by David de Schweinitz ([email protected])

EZNEC_FILES
               Directory containing contributed EZNEC antenna description
               files.

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