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 (bsn@fusion.ph.utexas.edu) 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 (bergervo@prl.philips.nl) 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, bergervo@natlab.research.philips.nl bergervo@iaehv.nl nec2pc.zip NEC2 executable for DOS. Runs on 286 or better processor. Requires math coprocessor. from Malcolm Packer (from Malcolm_Packer@cpqm.saic.com) nec2.sun4.dl.Z SUN4 executable (dynamically linked) of NEC2 compiled for 1000 segments (Modified for interactive input/output filename specification) from Weston Beal (weston@lisboa.eng.sun.com) nc2s1500.sun4.Z SUN4 executable (statically linked) of NEC2 compiled for 1500 segments from John Boyer (john.boyer@rd.eng.bbc.co.uk) nec2.rs6000.Z IBM RS/6000 executable of NEC2. Runs under AIX 3.2 from Doug Braun (dbraun@iil.intel.com) 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 (jdc@cci.com) 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 (jdc@cci.com) nec2.hpux.Z NEC2 executable for HP 700 series workstation running HPUX version 9.02 from Charlie Panek (charlier@lsid.hp.com) 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 (charlier@lsid.hp.com) 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, jeffj@cbnewsm.cb.att.com) 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 (dbraun@iil.intel.com) nec_post_processor.Z Creates polar plots from NEC output. MS Quick Basic source code. from John Boyer (john.boyer@rd.eng.bbc.co.uk) 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 (john.boyer@rd.eng.bbc.co.uk) 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 Malcolm_Packer@cpqm.saic.com) 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 (davidson@firga.sun.ac.za ) 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 (fjcmeyer@emss.co.za ) 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 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 somnec_readme.txt This is the text file contained in somnec.tar that provides a general discussion of the program. contributed by George Christianson 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) 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 (dave.des@metronet.com) EZNEC_FILES Directory containing contributed EZNEC antenna description files.