Numerical Electromagnet Code (NEC) Archives ( page updated June 6,2005) The unofficial Numerical Electromagnetic Code (NEC)ArchivesTo contact archive maintainer: raymonda@ieee.org Quick Links to the mostpopular downloads: 4nec2 nec2++ nec2c MultiNEC File Name ShortFile Description NEC Executables, Source Code and Documentation ANTENNA.EXE ANTENNA.EXEis a self unzipping DOS file containing WIRE,based on some of the original MiniNEC work. However, the changes were sodrastic that it can no longer referred to it as a variation on MiniNEC. One feature thatit has is that it can handle coaxial structures. Thus a coax can be analyzed as twowires of different radii. There is care required at the terminations since there is fringingcapacitance since an actual end-cap has not been included. A paper covering thetheory behind WIRE is also available for download. Theplotting of current and patterns were designed to berather straight forward. The package can handle up to about 160 unknowns inDOS. programand documentation provided by author Dr.William A.Davis <wadavis@vt.edu> mininec3.zip Minninec3BASIC source code and DOS executable for mininec3 fromNOSC (Naval Ocean Systems Command) mininec_help.txt Minninec3 helpHelp file covering the use of the Mininec antenna modelingprogram. Of particular use to those not having access to a copy of theMininec manual. (contributed by JeffJones AB6MB,jeffj@cbnewsm.cb.att.com) mininec_doc_sources.txt Minninec3 docsourcesA short text file giving document #'s and order address forMININEC documents. NEC-2_for_MMANA_v_18.zip Updated 10/23/2003 to version 1.8 NEC2 for MMANA (Version 1.8) The utility "NEC-2forMMANA" is intended for calculation of antenna models made and optimizedinprogram MMANA and for construction and simulation of antenna modelsusinginput language NEC-2 and based on MMANA models. Calculation is madewithuse of NEC-2, including calculations above a surface of the ground inSommerfeld-Nortonmodel and calculations with use NEC-2 Extended thin wire kernel. Alsoin"NEC-2 for MMANA" it is possible to make calculation in a case whensomewires in MMANA model are in dielectric isolation. Correction andeditingof NEC-2 input code is allowed using most of cards from input NEC-2language.A maximum quantity of processable segments - 3000, NEC-2 enginecompiledby Arie from Neede, Netherlands. All files of the program are placed inonedirectory, program must be used only as 32-bit windows application (Win98/2000/ME/XP) Furtherinfo is available at: http://www.qsl.net/ua3avr/ contributedby DimitryFedorov, UA3AVR(http://www.qsl.net/ua3avr) Source code: Updated 1/25/2005 nec2pp_latest.tar.bz2 autoconf source distribution:Updated 1/25/2005 necpp-1.1.1.tar.gz Windows executable (compiledunder Visual C++): Updated 1/25/2005 nec2++.zip Linux executable (Release 1.04compiled underSuse Linux 9.0 by R. Anderson) Updated12/5/04 nec2++_linux.zip nec2++ Latest releaseuploaded 1/25/2005 Release1.1.1 2005-1-21 Cleaned up and reworked patch subdivision. Fixed a bug in interpolate() caused by not having theprecalculated data static. Thanks to Neokolis for pointing this out. Cleaned up rom2() and rechecked program flow. * Got LAPACK going. There is generally a 100% speedup. However the LAPACK routines sometimesproduce different answers to the built in LU decomposition routine? Therefore LAPACK LU decompositions is still not included in the default build.* Fixed up a re-initialization problem in the temporary geometry files.* Several Improved testharness code.* Moved temporary geometry into the geometry class. Set this up in the geometry_complete() method.* Added #include <unistd.h> to misc.cpp* Ignore Radiation Pattern Polarization angles in the testharness where the power level is -999 dB. These have no physical meaning and are often different with LAPACK. Release 1.0.72004-12-16 * Switched command-line option parsing to XGetoptfor cross platform compatibility * Fixed major bug in Win32 executable that caused acrash on file output (Thanks to Jerome Plet) * Added Visual Studio Project files * Changed member 'near' of nec_context to m_near toavoid a conflict with the VC++ reserved word 'near' * Modified the error message macro to allowcompilation on Visual C++. This causes error messages to NOT have acontent if nec2++ is compiled with a non-C99 standard compiler. To build libnecpp, and use NEC from a C API, you need to use autoconfand friends -- to install these on Debian linux, simply type apt-get install automake libtool To build the library, download the autoconf distribution[878 kB] and issue the following commands:tar -zxf necpp-1.0.7.tar.gzcd necpp-1.0.7./configuremakemake install Release 1.0.6 2004-12-13 * Fix for non-initialization of voltage sources ifno excitations were specified (Thanks to Jerome Plet) * Cleaned up code for bad loop in nec_context(Thanks to Neoklis Kyriazis for this) * Removed old Numerical Greens Functions code andvariables -- these were not doing anything (ib11 e.t.c.) * All system exit (stop()) calls have been removedand replaced by exceptions (apart from those inside the main commandline programme) Release 1.0.5 2004-12-10 * Most of the system exit code has now been replacedby C++ (nec_exception*) exceptions. This allows error messages to becaught without terminating execution of the calling programme. * Windows executable as compiled for athlon-xp only. * Fixed a problem with initialization betweenmultiple simulations on the same deck. This caused the secondsimulation (an XP card or RP card for example) to sometimes yield wrongresults. * Some memory cleanups. Updated 12/5/04 Release 1.0.42004-11-29 * Added a benchmark command line switch (-b). We usethis for comparing machines that will be used inclusters. * I have moved over to using autoconf and libtool.The original makefile is still working and most usersshould use that version to build nec2++. * NEC is now available from a C API, and linked as alibrary. See the example directory. To build thelibrary, you need to use autoconf and friends (see above). * Speed up CMSET by eliminating multiple assignments. * Speed up using the safe_array::sum() method. Updated 10/22/04 Fix up a bug in the Sommerfeld/Norton ground code (Thanksto Arie Voors for helping to locate this). This bugis probably present in nec2c as well, and will result in incorrectmodelling. Initialupload 9/24/04 NEC2++ is a port of the Numerical Electromagnetics Code(NEC-2) to C++. This work is based on the C port by N. Kyriazis,including pieces from additional work by Jeroen Vreeken. The newportions of code are licensed under the GPL. Summaryof Changes Movedthe geometry parsing to a separate file. Will move toPCCTS, andan API for specifying geometry. Improvedcommand-line syntax and handling of output filenames. Movedto a safe_array for all arrays. Fixedmany index-out-of bounds errors. Createda testharness (nec2diff). Introduceda typedef for nec_complex. Modifiedoutput to be compatable with xnecview Movedall graph output to separate class. MovedSommerfield Calclations to separate class. Cleanedup complex calculations Removedall compiler warnings [except one that indicates apiece of code I don't understand]. Renamedvariables. Moveda lot of #defines into local code. Putin some code to allow the incident field amplitude tobe specified when using an EX card (like NEC 4). Inthe very near future, nec2++ will depend on the ATLAS. Toinstall this use the following commandsunder DEBIAN linux (http://www.debian.org). apt-get install atlas3-base atlas3-headers atlas3-base-dev apt-get install refblas3-dev lapack3-dev lapack3-docOnother operating systems, you should look athttp://math-atlas.sourceforge.net.Tocheck for latest updates and other info see the authors web page: http://www.physics.otago.ac.nz/research/electronics/nec/index.html contributed by theauthor Tim Molteno at theUniversity of Otago, New Zeland ( tim_AT_ physics_._otago_._ac_._nz) [remove _AT_ and other _ characters in e-mail address] nec2c.tar.gz (source code) nec2c (Linux executable) nec2c_gccV2.96_patch.tgz (patch to allow compilation with gcc 2.96) nec2c.rxq-0.2.tar.gz (Improved port by PE1RXQ) Initalrelease 2/2/04Bugfix uploaded 2/27/2004 Problem with data cards being listed inone line fixed. (missing \n in a printf() statement inserted) Descriptiontext updated 6/18/04 Patch available to allow compilation on gcc 2.96 compiler 6/28/04 Added link toPE1RXQ modified version 8/20/04 nec2c(nec 2 in C) nec2c is a translation of theNEC2 FORTRAN source code to the C language. The translation was performed mostly "by hand" and a lot ofmodifications to the original program were introduced in order to modernizethe NEC2 and to remove as many built-in limitations as possible. Theattendant SOMNEC program was also translated to C and incorporated innec2c as a function so that Sommerfeld ground solutions are a part of theprogram. 2. CHANGES: The following is a list of the more significant changesincorporated into nec2c during translation from FORTRAN to C: * All GO TO constructs have been removed (all 961 of them!) and"spaghetti" code sections untangled as far as was possible to the author.Still, a lot of the code is not as clean and straightforward as might havebeen. * Obsoletememory-saving practices (such as "equivalences" of different variables) have been eliminated and memory-sharing variableshave been separated so that they are independent. * All fixed-size arrays used in calculations have been replacedwith buffer pointers which are allocated memory dynamically accordingto the needs of the program and the complexity of each structure'sgeometry. There is a two-fold advantage in this - there is virtually nolimit to the complexity of a structure (number of segments/patches etc),and there is no wasted memory in fixed arrays. Additionally, there is noneed for data storage/swapping between memory and files and thereforefunctions relating to this activity and also the NGF form of solution havebeen removed from the program. * When a Sommerfeld finite ground solution is requested, sincethe SOMNEC program has been incorporated in nec2c there is no needto store the ground grid data in a file and read it when running nec2c.Instead, ground grid data are calculated as needed and for each newfrequency if frequency stepping is specified. * The factr() and solve() functions have been modified to handlethe main matrix (cm) in untransposed form so that calculations arefaster. * The parser that reads the input file allows the two charactersof the mnemonic to be in lower case if preferred. It also allowscomments to be inserted anywhere in the input file in Unix style, e.g. all lines beginning with a '#' are ignored. * Operationally, nec2c differs from NEC2 in not being aninteractive application. Instead, nec2c is a non-interactive command-lineapplication which accepts an input file name and optionally an output filename. If this is not specified, a name for the output file is made bystripping any extensions from the input file name and adding a ".out"extension. Furthermore, nec2c has the potential of being incorporated inanother application (like a GUI) after suitable modifications, allowingthe creation of a stand-alone program without the need for readingfiles produced separately. * My original motive for translating NEC2 into C was to make iteasier to modify and modernize and to change obsolete functions andusage. As a result I have edited to some extend the format of the outputfile to make it more "human readable" (e.g. provided a single spacebetween adjacent numbers to avoid a hard-to-read "chain" of numbersjoined by - signs) etc. In my humble opinion these changes make the outputfile easier to read and possibly somewhat more presentable, althoughthis is likely to be a problem with applications that read the outputfile in a rigid manner, based on the exact output format. I apologize forthis change if it causes such problems but my intention is toeventually modify nec2c to be used as part of a graphical application,providing results for graphical plots directly in its buffers. (the above extracted from the README file) The file nec2c.tar.gz containsthe source code. contributedby the author NeoklisKyriazis 5B4AZ Limassol, Cyprus(e-mail address in the README file) ---------------------------------------------------------------------------------- The file nec2c is a Linuxexecutable compiled from the nec2csource code with GNU gcc 3.3.1 running on a Suse 9.0 Linux system.(compiled by Ray Anderson WB6TPU) -----------------------------------------------------------------------------------A patch is available that changes the definition of complex constants.It is needed to compile nec2c usingcompilers like 'gcc V2.96' or'egcs-2.91.66' (and some others). patch for gcc 2.96 contributed byRoland, DK1RM (e-mailaddress in the README file) -------------------------------------------------------------------------------------- The file nec2c.rxq-0.2.tar.gz isan improved port based on the 5B4AZ port but with modifications by JeroenVreeken PE1RXQ ( http://sharon.esrac.ele.tue.nl/users/pe1rxq/).The code has been modified to present a cleaner structure and theoutput format is now compatible with xnecview and other postprocessors..------------------------------------------------------------------------------------------------------ nec2d_me.zip nec2d_me Version 1.02 Notice: Several users have reportedproblems with nec2d_me and nec2d_lapack. These problems wererelated to inaccurate results when the NE card was in the inputdeck and software crashes when an LD (load) card was present. Theauthor's e-mail address appears to be no longer active. AWin32 executable targeted to the PentiumPro or later IA 32machine and using allocatable arrays so that one program handles allstructure geometry sizes. The folder also has a SOMNEC executable andthe modified source code (Fortran 90). contributedby Joe Lastovka (joe_lastovka@yahoo.com) nec2d_lapack.zip nec2d_lapack Version 1.02 Notice: Several users have reportedproblems with nec2d_me and nec2d_lapack. These problems wererelated to inaccurate results when the NE card was in the inputdeck and software crashes when an LD (load) card was present. Theauthor's e-mail address appears to be no longer active. Sameas NEC2D_Me except that it uses the Intel MKL LAPACKroutines to factor and solve the NEC matrix equations. Pentium IIIonly. About 20 times faster on matrix factor and solve at large matrixsizes. contributedby Joe Lastovka (joe_lastovka@yahoo.com) nec2dx500.zip nec2dx1500.zip nec2dx3000.zip nec2dx5000.zip somnec2d.zip nec2dx Uploaded4/22/2002 nec2dxis a double-precision code compiled with GNUg77. Runsas a 32-bit application in a DOS console window under Windows 95, 98, NT, 2000, and XP. Thesenec2dx executables have been generated from source codemodified to allow 300 separate LD cards as opposed to the normal 30.Also modified with FACTR and SOLVE routines modified to supportnon-transposed matrices for faster runtime performance Executableshave been compiled for the following number ofsegments: 500 (nec2dx500.zip) 1500 (nec2dx1500.zip) 3000 (nec2dx3000.zip) 5000 (nec2dx5000.zip) Thecompanion somnec2d executable has also been compiled withg77 and generates the nec2d.nec files necessary to utilize the Sommerfield-Norton ground inNEC2. Theseexecutables are made available for BETA testing. If youencounter any problems with these, please report the bugs. modifiedand compiled by RayAnderson WB6TPU <raymond.anderson@sun.com> nec2dx_src.zip nec2dx_src Uploaded 4/22/2002 Filenec2dx_src.zip contains the source code used to generatethe nec2dx family of executables. The file contains: nec2dx.f, NEC2DPAR.INC, somnec2d.for, andcompilation instructions for use with GNU g77. Thecode has been modified to allow 300 LD cards as opposed tothe standard 30. Also modified to use non-transposed matrices in the FACTR and SOLVE routines forfaster runtime. Ray Anderson WB6TPU <ray.anderson@xilinx.com> Nec2dxs.zip nec2dxs Updated 02/11/03 Now executes faster due toimproved compiletime optimization Nec2dxs.zipcontains executables (and source code) for aversion of NEC2 that has the Somnec interpolation table generator integrated into the NEC2executable. One of the advantages of this arrangement is that a new set of interpolationvalues is generated for each simulation frequency point. This leads to higheraccuracy simulations when the effect of the ground is included. Compiled with GNU g77 andbased on the same code used to compile the nec2dx*** series of executables. Worksunder Win 95/98/Me/NT4/2000/XP as a 32 bit windowsapplication from a DOS console window. Contributedby the author Arie, <4nec2@gmx.net>Neede, The Netherlands] nec2dXS_FB.zip nec2dXS_VM.zip nec2dXs_FBnec2dXs_VM Latestupdate 2/2/2004 nec2dXS_VM.zip recompiled with new compiler to nowadd 8K and 11K executables. Special purpose versions of nec2dxs (single precision) NECcode 1) nec2dXS_VM.zip Containing 500, 1500, 3000 and 5000 segment exe's, capable of runningvirtual memory up to a segment count as indicated by the executablename,(when when physical memory is insufficient). 2) nec2dXS_FB.zip Containing 500, 1500, 3000, 8000 and 11000 segment exe's. Tobe usedwhenphysical memory is enough to run the nr of segments as indicated by theexecutable name. (Furthermore 30-60% faster with small segment counts) Contributed by the author Arie, <4nec2@gmx.net> Neede, TheNetherlands] vis_nec.zip Visual NEC Version 1.03 A first cut at a Windows GUI to NEC2D. Also incorporates the IntelLAPACK routines, and so is Pentium III only. Also integrates SOMNECinto the GUI. contributedby Joe Lastovka (joe_lastovka@yahoo.com) nec_viewer.zip NecViewer Version 1.02 A first cut at a Windows program for plotting the segments defined inan NEC input deck and visualizing the structure contributedby Joe Lastovka (joe_lastovka@yahoo.com) NEC2_Mac_.hqx NEC2_Macfor Macintosh (68k) NEC2 executable for the Macintosh (68K) with mathcoprocessor. from Barry Newberger (bsn@fusion.ph.utexas.edu) NEC2_Mac_README.txt NEC2_MacReadme Document file for Mac version of NEC2 NEC2_Mac.sea.hqx NEC2_Mac for PowerPC Mac NEC2 executable for PowerPC Macintosh. Also a version for 68KMacs with no coprocessor. Fortran source code is included. from Barry Newberger(bsn@fusion.ph.utexas.edu) NEC2_Mac_PPC_.txt NEC2_Mac for PowerPC Mac Docs Document file for PowerPC (PPC) version ofMacintosh NEC2 nec2.macosx-darwin.ppc.tar.gz NEC2 compiled forMacOS X / Darwin 1.2.1. Thisbinary was produced on a Power Macintosh G4/400 runningOS XPublic Beta Thisbinary was compiled from the NEC2 C source. The C sourcewas obtained from Raymond Anderson's Unofficial Numerical Electromagnetic Code (NEC)Achive. (http://www.qsl.net/wb6tpu/swindex.html). The source was originallyfrom the ucsd.edu archives, and was converted from FORTRAN to C using f2c,according to the Unofficial Archives. Somemodifications to the original Makefile and sources werenecessary for the sources to compile. I could not get the sources to compile using thesupplied f2c.h headers, so the f2c library from Bell Labs (netlib.bell-labs.com)was installed and linked to produce the final binary. Typographical errorsin the Makefile and some sources which prevented compilation and linking werealso corrected. Thegzipped tar file contains the executable, a README file,diffs to document source changes and several example inputfiles. contributedby DerwoodEadie KG4EFO (KG4EFO@arrl.net) 21 Nov. 2000 necfpc.zip NEC2 compiled forPower PC's w/ 32 bit reals Thisversion of NEC2 uses 32 bit reals and compiles wellwith Microsoft Fortran for Powerstations. I obtained it from ftp.ucsd.edu /hamradio/NEC and have added the subroutine SECNDS for PC:s. The NEC-code at that site contained a nasty bug in a Hollerith string that is corrected. The subroutine ENF iscommented away since it is not needed on PC:s. A declaration that changed a common area is also corrected. The resulting executable has been checked against a few testcases and seems to give correct results. The original notes and doc files is not changed. SM5IUF /Gunnar Isaksson gunis@weald.air.saab.se nec-pc.zip Note: Doesn't work underWindows XP nec-pc NEC2Dexecutable compiled to run on PC 386/486 Compiledwith32-bit Lahey Fortran. Requires 80x87 math coprocessor. File contains 4versionscompiled for different maximum numbers of segments and hence requiredifferentsamounts of memory Includes SOMNEC2D.EXE Sommerfeld parametergenerator. 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 (*)NEC2D.EXE should be in the directory from where you run the otherexecutables, it is the only one that contains the DOS-extender. Theothers borrow itfrom NEC2D.EXE. (updated1/22/96) from Jozef Bergervoet (bergervo@prl.philips.nl) nec-pc-x.zip Note: doesn't work underWindows XP NEC2Dsupplement for nec-pc Thiszip-file is a supplement to nec-pc.zip. It containslarger versionsof the NEC executable, for problems with more than 1392 segments. Theycanonly be used together with NEC2D.EXE, from nec-pc.zip. Descriptionof the NEC2D files:-------------------------------------------------------------------------- EXAMPLE.DATis an input file with several examples. These canbe 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 Approximateexecutable 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 otherexecutables, it is the only one that contains the DOS-extender. Theothers borrow itfrom NEC2D.EXE. F77L3.EER F77L3.EERContains the text for Fortran error messages(nec-pc.zip.) *.FOR,*.INC Files containing the Fortran source code. Innec-pc-x.zip-------------------------------------------------------------------------- Jos Bergervoet,bergervo@natlab.research.philips.nlbergervo@iaehv.nl nec2pc.zip NEC2 executablefor DOS. Runs on 286 or better processor.Requires math coprocessor. from MalcolmPacker (fromMalcolm_Packer@cpqm.saic.com) nec2.sun4.dl.Z SUN4 executable(dynamically linked) of NEC2 compiled for1000 segments (Modified for interactiveinput/output filenamespecification)from Weston Beal(weston_beal@mentorg.com) nc2s1500.sun4.Z SUN4 executable(statically linked) of NEC2 compiled for 1500segments from JohnBoyer (john.boyer_at_rd.eng.bbc.co.uk) [_at_ = @ ] nec2sx.tar nec2sx Uploaded 3/22/01 Fortran 77 sourcecode of single-precision NEC2 modifiedwith FACTR and SOLVE routines modified to support non-transposedmatrices forfaster runtime performance. File nec2sx.tar contains the Fortran sourcecodeand simple compilation directions. File nec2sx is acompiled SUN Solaris executable that alsoincludes support for multithreaded execution. See the documentation inthe sourcecode tar file for setting up the multithreaded environment variable.Thiecutable is compiled to support 1500 segments. Compiled on Solaris2.5.1,also tested on Solaris 7 and 8 contributedby Ray AndersonWB6TPU <raymond.anderson@sun.com> nec2dx.tar nec2dx Uploaded 3/22/01 Fortran 77 sourcecode of double-precision NEC2 modifiedwith FACTR and SOLVE routines modified to support non-transposedmatrices forfaster runtime performance. File nec2dx.tar contains the Fortran sourcecodeand simple compilation directions. Filenec2dx is a compiled SUN Solaris executable that alsoincludes support for multithreaded execution. See the documentation inthe sourcecode tar file for setting up the multithreaded environment variable.Thiecutable is compiled to support 1500 segments. Compiled on Solaris2.5.1,also tested on Solaris 7 and 8 contributedby Ray AndersonWB6TPU <raymond.anderson@sun.com> nec2.rs6000.Z IBM RS/6000executable of NEC2. Runs under AIX 3.2 from DougBraun (dbraun@iil.intel.com) nec2.rs6000_readme.txt Documentfile for RS/6000version of NEC2 nec81.tar.Z nec81.zip Fortran 77 source codefor nec-81. (modified for 3000segments) (Previously listed as nec3, but renamed to alleviateconfusion with the real nec3.) (from PetriKotilainen OH3MCK) nec81.readme.txt Readme file fornec-81 modeling program. nec2_src.tar.Z Fortransource code forNEC2 nec2.in.c.tar.Z NEC2 source codein C. Converted from Fortran with f2c. (fromucsd.edu archive) nec2.linux.Z NEC2 executablefor Linux. Compiled with g77 from Jim CroninN2VN (jdc@cci.com) nec2.linux_src.tar.Z NEC2 source codein Fortran hacked to compile with 'g77' Contains nec2a.f and secnds.f (a dummy version of secnds) Builds withthe following command line under Linux: g77 -o nec nec2a.f secnds.f from Jim Cronin N2VN(jdc@cci.com) nec2.hpux.Z NEC2 executablefor HP 700 series workstation running HPUXversion 9.02 from Charlie Panek(charlier@lsid.hp.com) nec2.hpux.f.Z NEC2 Fortransource code for HPUX version. This code wasmodified from nec2_src.tar.Z found in this archive to be compatiblewith HPUX version 9.02 from CharliePanek (charlier@lsid.hp.com) nec2.hpux.txt nec2.hpux.txtShort text file describing the changes made to originalFORTRAN source code to make it run under HPUX. SOMNEC2D.EXE SOMNEC2D.EXEis used to generate SOMMERFELD parameters in advance. It isonly needed for jobs that use it, e.g. some of the examples inEXAMPLE.DAT. Before running those jobs, SOMNEC2D should be called (seeNEC documentation.) Input for example jobs: 4 .001 10 1 It makes thefiles: SOM2D.OUT (ascii) and SOM2D.NEC (binary) that are later used byNEC2D. In that case NEC2D creates a further file NGF2D.NEC (binary.)SOMNEC2D.EXE is found in nec-pc.zip. Link to Poynting Software: www.supernec.com SuperNECSummary "SuperNEC is a hybrid Method of Moment (MoM) / Unified Theory ofDiffraction (UTD) antenna simulation software program based on NEC2,designed and developed by Dr Derek Nitch and Dr André fromPoynting Software. SuperNEC incorporates a 3D input and output interfaces. Bundled withadditional features such as, a Genetic Algorithm optimizer, "SimplySparse" solver core by Dr Francis Canning (patent pending) ,as well asthe Sparse Iterative Method (SIM) and scripting capabilities, SuperNECis your Complete Professional EM simulation software tool. This electromagnetic (EM) software package is used for custom antennadesign and antenna analysis among other applications Packages vary from FREE versions to commercial packages" Link: www.supernec.com Note: SuperNEC is not publicdomain or freeware or GPL'ed. It is a product of Poynting Software (Pty) Ltd. A version of SuperNEC is beingmade availabe for use free to academic and other non-commercial users(amateur radio operators and some others). Presently, to use thisversion you must have Matlab 5.3 or later installed on your system. Inthe future a version that does not require a separate Matlab install isplanned. Contact Poynting Software at the address found on their linkedweb page to arrange for downloading the "free" version. INSTYGO2.EXE YGO2 YAGI GENETICOPTIMIZER II ------------------------- YGO2is a FREEWARE progarm. It may be freely copied anddistributed, but ONLY as long as there is no cost to therecipient. Unlikethe original release of YGO, this version allows theuser to optimize the array at up to 15 different frequencies, and tospecifya different driven element (if desired) at each frequency. UnexcitedDEsare assumed to be terminated in the feed system characteristic imped-ance. YGO2(YAGI GENETIC OPTIMIZER II) designs optimized Yagiantennas using one of the most recent and powerful techniques inapplied electro- magnetics: a genetic algorithm. A genetic algorithmmimics natural sel- ection ("survival of the fittest") by creatinggenerations of Yagi designs in which the best designs ("individuals")pass their design parameters ("genes") onto the next generation in sucha way that better and better antennas are the result. GA optimizers canproduce remarkable results not achievable with any other designtechnique. Genetic algorithms are superior to deterministic optimzers,and they are easily implemented on a PC. YGO2is user-friendly and easy to run. All GA parameters arechanged by editing a single set-up file. The user can specify popu-lation size,number of generations, antenna figure-of-merit, and all otherparametersneeded by the GA. The Yagi's performance is computed using NEC-2D, thestate-of-the-art Numerical Electromagnetics Code (double precision)developed at Lawrence Livermore National Laboratory. WhenYGO2 has completed its optimization, the radiationpattern ofthe best antenna is plotted on screen. A separate plotting utilityallows the user to view radiation patterns for other top designs on ageneration- by-generation basis. One of the GA's most attractivefeatures is that, instead of producing only one "best" design, itproduces groups of designs thatachieve similar performance. The designer can then select from thesegroupsthe Yagi that best meets the requirements. Toinstall YGO2, copy the file INSTYGO2.EXE into the directoryon your hard drive that you will use for YGO2. YGO2 files are createdby executing INSTYGO2.EXE, which is a self-extracting EXE file.If you have a previous version of YGO2, simply overwrite all files ofthe same name. Besure to check the README.TXT and YAGI_GA.TXT files forinform- ation on setting up a YGO2 run. The file NEC2INFO.TXTcontainsinformation on creating various size NEC-2D executables. Any changes toYGO2 will be described in the file UPDATE.TXT. Please read UPDATE.TXTif it is present. YGO2is a DOS program that must be run under MS or PC DOS(ver.3.3 or higher), Compaq DOS (ver.3.31 or higher), or in a DOSwindow under MS Windows 3.0 or higher. YGO2 also requires an 80386/87math coprocessor or higher CPU and about 1 MB of RAM (depending on themodel size). Contributedby PhadeanEngineering <phadean@ieee.org> POBox 611, Shrewsbury, MA 01545-8611 USA, tel. (508) >869-6077, fax(508) 869-2185) ygo3inst.exe Latest Version uploaded4/19/2001 YGO3 (YagiGenetic Optimizer, Ver. 3) is a real-valuedgenetic algorithm (GA) that designs optimized Yagi-Uda arrays by maximizinga user-specified figure-of-merit (FoM). Antenna designs created byYGO3 are modeled by NEC-2D (Numerical Electromagnetics Code, Ver. 2,double precision), a recognized standard for modeling wire antennasdeveloped at Lawrence Livermore National Laboratory. YGO3 handles up to 150ele- ment arrays at up to 50 frequencies. The GA includesstate-of-the-art techniques such as quadratic interpolation, auto-grooming,coefficient perturbation, coefficient activation, several selection methods, andtwo crossover methods. YGO3 is a DOS program which may be run in aDOS win- dow under the Windows operating system. YGO3is a FREEWARE program. It may be copied anddistributed without restriction as long as there is no cost or charge of anykind, including "tie-in" costs, to the recipient. YGO3 has beendeveloped and is distributed as a service to the amateur radio community. Please email comments, suggestions, or questions to: ygo3@yahoo.com. YGO3is installed by executing the self-extractingfile YGO3INST.EXE in the default directory, usually C:\YGO3. Allnecessary files are created, including several versions of NEC-2D that allowfor models with 28 to 1500 segments. Please read the fileYGO3_MAN.TXT for setup and operating instructions. YGO3is the successor program to YGO2, a binary-codedgenetic algorithm for optimizing Yagi arrays. Because YGO3 includesseveral improvements, designers using YGO2 should upgrade to the newerreal-valued GA. Contributedby PhadeanEngineering <phadean@ieee.org> POBox 611, Shrewsbury, MA 01545-8611 USA, tel. (508) 869-6077, fax(508) 869-2185 --------------> NEC Utilities andRelated files: 4nec2v552.zip 4nec2X552.zip 4nec2 Version 5.5.2(updated June 12, 2005) ( see http://www.wyger.nl/usr/4nec2/ for all the latest on 4nec2 from the author's website) Changesfor 5.5.2 (June 2005) - Majorbug fix related to GM card and European regional settings. -Selection between multiple V/I sources for line-chart display -Import/conversion of EZnec type input-files added. -Display of dB value to correct with for Average Gain Test. -Geometry builder (build.exe) now supports auto-segmentation. - EZnecstyle 'MiniNec' ground-type (GN 3) added. -Tracing/logging of SY(mbol) conversions added. - Bug fixwhen using current sources with step-radius correction. - Bug fixwhen changing colors for Geometry and 3D display. - Bug fixwhen selecting more than 32 var's to optimize. Changesfor 5.5.1 (April 2005) <><> -Far-field plot, theta angles > 360 degrees are now displayed asminusvalues. -Settings are now saved again when close button is used. -Initial azim/elev angles in optimizer are now okay. - Gnuplot2D/3D display for azimuth/elevation angles and labeling corrected. - SomeNec-4 specific height- and radius tests corrected. - Printfunction did behave strange sometimes, now should be OK. - Someother small corrections and additions. Changesfor 5.5.0 (with latest bug fix as of 2/12/05) - Now possible to use with both Nec-2 and Nec-4 (Nec4d*.exe)- Problems resulting from XP service pack 2 discussed in thereadmefirst.txt file.- Segmentation-bug introduced with previous version 5.4.1 removed again.- Same for bug related to GM cards in conjunction with surface patches.- Same for zero segment/wire length bug. Changes with 5.4.1 - Batchprocessing for automatic testing and calculation of multiple (4)Nec2files.- Extensive geometry checking added: Overlaid wires,Crossing/unconnected wires, Intersecting volumes, Short/thick wires at sharp angle, Unequal segmentation for parallel wires, Too low hight, etc.- Automatic convergence-testing function with line-chart result display.- Enhanced variable-sweeper function for more easy use.- User selectable traditional- or Eznec-style current/phase display.(also in 3D viewer)- Screen grabber added for easy cut/paste or print parts of thescreen/window/form.- BugFix related to regional setting when generating gnuplot data-files.- BugFix related to diplays using large resolutions.- Few minor bugs introduced with 5.4.0 removed. Changes with 5.4.0 - Automatic generation of L, Pi and T matching-networks (low- andhigh-pass)- Plot 2D and 3D graphs/charts using gnuplot freeware package- Show Circular Polarization components E(left) and E(right) forfar-field.- Use of Symbols when creating file with geometry editor to be able tooptimize design.- Autosegmentation/Stepradius bug on Windows-XP removed.- At one place, feet was .3058 instead of .3048 meters.- Some other minor things changed/fixed/improved. Changes withversion 5.3.9 Incorporatesseveral minor bug fixes. Changes withversion 5.3.8 Incorporates bug fixes toalleviate problem with saving files withoutextension. It is now possible to specify insulated wiresusingan optional LD7 type loading. Changes withversion 5.3.7 Incorporates various minorenhancements and bug fixes. Changes with version5.3.5 Incorporates various minor enhancements and bug fixes. Changes with version5.3.4 Incorporates miscellaneous bug fixes forproblems found in earlier rev. Changes withversion 5.3.3 Incorporated several minor bug fixes andone major bug fix associated withWindows 2000. Several minor enhancements added. Note: when installing, be sure tofirst install the 4nec2v533 package beforeinstalling the 4nec2X533 package. (These are to be installed in the samedirectory) Changes with version5.3.2 Minor bug fixes incorporated Changes with version5.3 Supplementary DLL and DirectX files filesincluded in install file. Drag and Draw support added for CM,GW, GS, FR, TL and GN cards in the antenna geometry editor. Ability to use non-metric units added. Changes with version5.2 Added ability to display surface patches.Minor bug fixes implemented. Changes with version5.1 - Additional optimizer based on genetic algorithmsadded. - Optimization for both single-frequency or band-of-frequencies. - More general and consistent data-entry when generating nec-2output. - Pre 4.3 version support for raw nec-2 input re-enabled. The new 5.1 4nec2X version also enables real-lifestructure-geometry and far- or near-field pattern visualization. The use of DirextXbased hardware graphics-acceleration delivers you fast rotating,zooming and moving of the more complex structures or patterns. (Clickhere toview some sample screendumps) To use this eXtended version, please download both the4nec2v**.zip and 4nec2X**.zip files, and read the _ReadMeFirst.txt file forfurther instructions. To support all those not having state-of-the art computersystems or uncommon graphics hardware the standard 4nec2.exe is alsoavailable. 4nec2v51.zip Basic 4nec2 installation (updated 01/10/03) 4nec2X51.zip Addition for DirectX based version (updated 01/10/03) 4nec2 is a user-friendly layer around the standard nec-2engine. The 4nec2 package contains all the software to specify,calculate, evaluate and optimise your antenna-system. It also incorporatesthe nec2dxs**** executables that integrates NEC2 and SOMNECinto the same executable. Some of the default 4nec2 capabilities: - 2D and 3D geometry-structure, current, far- and near-fielddisplay - Both a 'hill-climbing' and a Genetic-algorithm based optimizerincluded. - Capable of modelling nec-2 files up to 11.000 segments - Compare up to 5 different far-field plots in one view - SWR, Gain, F/B, F/R, Z-in, X-in frequency-sweep graphs - Optional use of variables, constants or equations in nec-2 inputfile - Flexible antenna evaluator and structure validator - Support to use current-sources within nec-2 definition - Smith-chart display with integrated line-length calculator - VOACAP, ICEPAC, REC533 type-13 and -14 antenna-file generation. - Automatic area-coverage evaluation and viewing usingVOACAP/ICEPAC. - Geometry-builder include in the package Changes withversion 5.0 - Real-life 3D viewer added using hardware-acceleration - Nec2dXS for increase number of LD, EX and NT/TL cards. - Max number of near/far-field increased to 200000 Contributed by the author Arie,<4nec2@gmx.net> eam_demo.zip eam_demo.zipEAM (electromagnetic antenna modeling) demo bySAIC (Science Applications International Corp.) Runs under Windows 3.1(DOS). EAMis a graphical user interface to NEC and BSC. Demo version has limitedcapabilitybut allows visualization and inspection of small to medium size inputdeckand output files. (from Malcolm_Packer@cpqm.saic.com) gamtoz.zip GAMTOZ isa program to convert MicroSmith .GAM files (such asproduced by ELNEC and EZNEC as well as by MicroSmith) to comma-delimitedfiles containing impedance values. Both source code (GAMTOZ.BAS) and acompiled(DOS) version (GAMTOZ.EXE) are included. (This copy virus free!) from Roy Lewallen W7EL jgraps.zip jgrapsReads NEC output files and plots radiation patterns. Writtenin Visual Basic and runs under Windows 3.1 in a PC DOS environment.(Revision 1.5 of 5/12/94) written by JohnBoyer (john.boye_at_rd.eng.bbc.co.uk) [ _at_ = @ ] lpcad23.zip LPCAD23is a program to design log-periodic antennas. Antennaspecifications are input and the program calculates the physicallengthsand spacings. A NEC or NEC for Wires input file is then automaticallycreated..(New version Rev 2.0 replaces version 1.37 with bug fixes andenhancementsas of 1/29/96) (Version 2.3 replaces version 2.0 as of 4/10/97(contributedby the author Roger Cox WB0DGF)<hygain@compuserve.com> lpcad27.zip LPCAD27is a program to design log-periodic antennas. Antennaspecifications are input and the program calculates the physicallengthsand spacings. A NEC or NEC for Wires input file is then automaticallycreated..This is version 2.7 (contributed by the author RogerCox WB0DGF)<Roger.Cox@telex.com> MultiNEC.zip MultiNEC Version 2.2.2 uploaded1/19/2005 Uploaded 2/25/2003 MultiNEC is a combination Excel andVisual Basic program that can automate the repetitive steps of antennamodeling. You can build your model via the user interface or import existing EZNEC,NEC, Antenna Model (Teri Software), ELNEC, MMANA, AO, or Nec/Wires formatmodels. MultiNEC can then calculate the results for a given scenario or can runmultiple test cases while automatically changing the model betweenruns. Output is available in tabular numeric format and in severaldifferent chart and plot formats. You can also show the expectedpropagation performance of your antenna. Propagation predictions are made via asimplified interface to the VOACAP engine and may be presented on both areacoverage maps and point-to-point plots. You can animate these maps andplots to easily see how the propagation might change given varyingionospheric conditions or as a result of changes to the model. MultiNEC can be used by itself ifdesired orit can be used to extend the capabilities of other antenna modelingprograms. For more information and downloadable user manuals seewww.qsl.net/ac6la/. Requires Excel 97 or later. Important: You must allow Excelmacros to be enabled or none of the MultiNEC buttons will work. If youclick a button and see small white squares appear around the perimeter of thebutton face, as opposed to seeing the expected button response, it means thatyou must make an easy, one-time change to your Excel settings. Pleasesee the ReadMe file for more details. Submitted by the author Dan Maguire AC6LA (ac6la@arrl.net). mynec4pc.zip | | | NECPOST-PROCESSOR V. 2.1 | | necpost2.bas is Nec-post-processor 2.1 developed by AgostinoRolando . The original file was necpostproc.bas by J. Boyer. I have taken Necpostproc.bas and nov.bas and mixed themtogether to display 2d - 3d radiation patterns and current distributionalong the antenna . It works better with vertical radiators. This 2.1 version has eliminated some little bugs of earlier2.0 . Note that ,in order to draw a true 3d radiation pattern, theantenna must be arranged as to have the feed point just in (0,0,0)coordinates. For yagi design, I found a good agreement with yagimax 3.0program by Lew Gordon. Here you find : nec2pc.exe - nec2 for pc. Requires 486dx or better and as muchmemory as the number of segments you use for antenna'sdescription. niv.exe - nec input viewer. Shows input structure descriptorfiles *.nec. You can evidentiate errors in designing your antennabefore nec2pc processing. nov.exe - nec output viewer . Shows the distribution ofcurrents along the antenna (*.out files). necpost2.exe - nec postprocessor . Shows radiation patternsand currentdistrib. for *.out files. A few sources examples are included. NOTE : To know how to compile input descriptor files, see NecUser's Guide in http://www.traveller.com/~richesop/nec/ , available inpdf format. Have a good work ! Agostino RolandoE-mail: rolago@iname.com ncsarsim.zip ncsarsim Uploaded 5/20/04 ncsarsim.zip contains routines to use NEC to simulate syntheticaperture radar imaging of a scene containing a target in some state of motion.Various states of motion, including rectilinear translation, vibration,and rotation, are considered, as well as superpositions of suchmotions.NCSARSIM is a program to control the operation of the method-of-momentsprogram NEC to simulate SAR imaging of a target that is moving in somefashion. (It can handle the case of no motion too.)contributed by the author GlennStumpff <gstumpff@yahoo.com> nec_docs_order_info.txt Provides info onordering official NEC2 documentation fromthe government. (updated 12/29/98) nec_exe2.zip nec.exe version 2New Versionupdated 5/15/02 nec.exe version 2 is now available for download. This new version superceeds the earlier version of nec.exe.The newexecutable has been tested on Windows XP and uses the Windows 32 bit consoleprogram mode. The associated source code should also be easier to port to Unix orLinux where the obvious compiler of choice would be gcc. I would welcome feedback fromanyone who anticipates compiling it for a Unix or Linux platform. -------------------------------------------------------- NEC.EXE an interface to SOMNEC data This utility (nec.exe) runs from the command shell (DOSprompt) andopens a NEC input file and determines if the Sommerfeld ground is usedandobtains the frequency, K and sigma terms so it can locate or generatetheappropriate SOMNEC interpolation grid before invoking one of thevariants of NEC2D. This SOMNEC data is stored for future use; the usercan specify the location of this data by setting the SOMNEC environmentvariable. NEC.EXE also determines the appropriate variant of NEC2D basedon the number of in-core segments. The program requires nec2d512.exe,nec2d960.exe, nec2d1k4.exe, and RTM.EXE in the current directory or thePATH environment variable. Source code included (The program could also be recompiled onUnix afer some modifications.) (contibuted by the authorRalph Holland , VK1BRH<ralph@arising.com.au> < http://www.arising.com.au/people/Holland/Ralph/index.htm > nec_hist.txt Article from the ACESnewsletter outlining the history of thevarious versions of NEC nec_param_util.Z Perl script to createNEC input files from parameterizedphysical descriptions. from Doug Braun(dbraun@iil.intel.com) nec_post_processor.Z Creates polar plotsfrom NEC output. MS Quick Basic sourcecode. from John Boyer (john.boyer_at_rd.eng.bbc.co.uk) [ _at_ = @ ] nec2pp_1.2.tar nec2pp Announcing the release 1.2 of npp. Npp is a nec2 executableand graphic post processor for Linux. It is based on a version of NEC2slightly modified and on the graphic package "yorick". NEC2 sourcecode, executable, yorick npp script, somnec, and numerous exampleantenna files included. It allows: * To run nec2 passing the name of the file .nec * To visualize in X-windows radiation diagrams ofantennas, * To display the main results as Gain, F/B, Z etc. * To produce Post Script files to be printed Requirements: Npp reqires yorick 1.4. (available from ftp://ftp-icf.llnl.gov/pub/Yorick/) If you wish recompile nec2 you need yaf77-1.3 (provided by Pino Zollo I2KFX<pinoz@highway.com.py>) nec2prt1.pdf NEC2 manual Part 1(Theory of Operation). This file must beviewed with Adobe Acrobat or other compatible viewer. Original wasscanned, cleaned up and ultimately converted to .pdf format. (contributed by AlexandreKampouris) nec2prt2.pdf NEC2 manual Part 2(Program Description - Code). Thisfile must be viewed with Adobe Acrobat or other compatible viewer.Original was scanned, cleaned up and ultimately converted to .pdfformat. (contributed by AlexandreKampouris) nec2prt3.pdf NEC2 manual Part 3(User Manual) This file must beviewed with Adobe Acrobat or other compatible viewer. Original wasscanned, cleaned up and ultimately converted to .pdf format. (from Unofficial NEC Home page ttp://members.home.net/nec2/) necdraw.zip DOS utility for verifyingcorrectness of NEC models. Checksadherance to rules and provides 3-D display of model. (from ACESarchive) nec_examples.txt This collection ofNEC2 input data files is provided courtesyof the Internet and Raymond Anderson. These input files may be used forthe NEC-PC programs, I've tried them on both, but have been using NEC2Dprimarily. NEC2D was provided by Jozef Bergervoet. I tried to giveenough examplesso that the control cards for input would be self explanatory. Alsomosttypes of antennas have been included such as log periodic, monopole,rhombic,deltaloop, Quad and the YAGI. These files are easily adapted andmodifiedwith the DOS edit function, using the search and replacefeatures. Good Luck on your antenna designs- Clyde Edgar WA6DCM from Clyde Edgar WA6DCM<Edgar@courier1.aero.org> nov.zip NEC output currentviewer. Written in QuickBasic 4.5 sourcecode included. Allows visualization of geometry and the current in eachsegment. Has rotation and zoom capability. (contributed by David deSchweinitz (dave.des@metronet.com) nv.zip NEC geometry viewer.Written in QuickBasic 4.5 . Includessource code. Allows visualization of a structure described in a NECinput file. Hasrotate about all three axis and zoom capability. (contributed by DaviddeSchweinitz (dave.des@metronet) nvnew.zip NVNEW New Version uploaded6/18/2004 NVNEW.ZIP contains an enhanced version of David deSchweinitz's NVprogram. These enhancements are in NVNEW.BAS/NVNEW.EXE and includesupport for GA, GH, GM, GX, and GR cards as well as support for VGAgraphics. It has the capability to print out (in monochrome) thedisplayed NEC structure (see PRINT.NV) and to output a PCX file(see PCX.NV), or as of 13 June 2004, a BMP file (see BMP.NV). Also asof 13 June 2004, it will now handle NEC input files that store multiplestructures, displaying each structure one at time. It now also workswith NEC4 input files. The archive also contains a special version ofNVNEW--NVCOMP. It displays the geometry in a lefthanded coordinatesystem(see NVCOMP.TXT). Glenn Stumpffgstumpff@yahoo.com Pointer to on-line docs(http://www.nec2.org) link updated 9/15/03 On-line NEC2 manualat URL http://www.nec2.org (in .html, .pdf, and .doc formats) also maintains links to other NEC resources somnec_readme.txt This is the text filecontained in somnec.tar that provides ageneral discussion of the program. contributed by GeorgeChristianson<gchristianson@pppl.gov> somnec.tar.Z This file contains the FORTRANsource code for the SOMNEC utility described in theofficial NEC2documentation, as well as asample outputfile and a brief text file containing a general discussion of theprogram.TheSOMNEC program generates grids used by the NEC2 program for theSommerfeld-Norton approximation to realistic grounds. contributed by GeorgeChristianson<gchristianson@pppl.gov> Win-ni.zip Win-ni Win-ni, Windows to Nec Wires(tm) interface. Providesa windows driver for the Nec Wires suite from K6STI. The window application allows Edit, Run, Plot, View, Sweep, and Convergence parms from one screen. You must possess a licensed copy of K6STI's 'Nec Wires' to utilize this add-on. contributed by the author Patrick Wintheiser W0OPW <w0opw@yahoo.com> wiregrid.zip WIREGRID Docs WIREGRID is a NEC2 pre-processor for DOS PC's that wasdeveloped for modelling metallic structures using a mesh of wires. Ithas powerful automaticfacilities for controlling the density of the mesh once the structurehasbeen broken down into a number of polygons. It can also be used as ageneral NEC2 pre-processor. It was originally written by C.F. du Toit.Note thatthe code uses its own data format, and unfortunately CANNOT import anexisting NEC2 model file, but it can of course export the model to astandard ASCII file. A description of the pre-processor has beenaccepted for publication: "WIREGRID: A NEC2 preprocessor", C.F.du Toit& D.B.Davidson, AppliedComputational Electromagnetic Society (ACES) Journal. (To appear.) Adraftversion of the paper (minus illustrations) is contained in the ZIPfile.Thecode was compressed using PZKIP version 2.04g. (wiregrid.zip Version4.00A now online 9/8/94) from Dr. D.B. Davidson(davidson@firga.sun.ac.za ) wg_211.zip WireGrid WireGrid for Windows is a NEC pre-processor for modellingmetallic structures using a mesh of wires. WireGrid AUTOMATES theDISCRETISATIONof conducting surfaces (polygons) in terms of wire meshes for analysisinNEC, and allows VISUAL FEEDBACK of the model structure as well as thepositions of sources, networks and field points. It also does CHECKINGregarding duplicate wires and closely spaced nodes not makingcontact. WireGrid for Windows (version 2.11) is the second release ofthis 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 DEMOmode. It is fully functional but limited to 15 elements.) from Dr. F.J.C. Meyer(fjcmeyer@emss.co.za ) W5GFE.tar.gz Jiffy "Jiffy" - by Bill Walker W5GFE (bw@cs.ecok.edu) This is a suite of programs written in BLT- an extension of TCL/TK -whichare intended to assist in visualizing antennas. The package is intendedto provide windows which show both antenna patterns and antennaconfiguration.An accompanying article in both LaTeX and PostScript form describes theprocess of designing a simple antenna using the system. The suite has been built under SCO 5.0.2 and SCO 5.0.4 (FreeSCO), but should run under any system that can make the blt extensionof tcl/tk work. (That should be the majority of systems on theplanet.) (contributed by Bill WalkerW5GFE , <bw@cs.ecok.edu > W5GFE2.tar.gz W5GFE AntennaToolkit - a Perl Toolkit for analysis ofNEC2 files SYNOPSIS Necview Azimuth [filename] Elevation [filename] Wires DESCRIPTION These programs are written in Perl/Tk (version 5.005_2), and provide tools which can help to visualize antennas or analyzedata which is produced by NEC2 - the antenna modeling program. The NEC2 program is commonly used by radio amateurs orprofessional antenna designers on Unix equipment to model antennas. While NEC2is quite versatile, the output of NEC2 is voluminous and difficult toread. This suite of programs provides graphical depictions of NEC2 output. Azimuth provides three graphs of "horizontal" radiation patterns: an ARRL-scaled polar plot, a linearly scaled polar plot, and a cartesian plot. A "factbox" provides indication of -3 DB beam widths. Elevation provides similar information for verticalradiation patterns. Wires is a visualization tool which shows three viewsof thesame antenna. Views are provided for the "XY plane", the "YZ plane"and the "XZ plane". Necview borrows heavily from the "xnecview" programby P.T. de Boer (pa3fwm@amsat.org). Sample data files are included in each subdirectory. The W5GFE Antenna Toolkit is released under terms of the GNU Public License. AUTHOR Bill Walker, W5GFE,bw@cs.ecok.edu W5GFE_toolkit_python_port.tgz Pythonport of W5GFE NEC Antenna Toolkit UploadedJanuary 16, 2004 README - Python port of W5GFE NEC Antenna Toolkit These Python scripts are a port of the Perl/Tk antenna toolkitdeveloped by W5GFEfor analysis of NEC2 files. The azimuth and elevation plotting scripts include a versionAzimuth(Mac).py and Elevation(Mac).py, respectively that use the Macfile system routines to open files, rather than the Python filemethods. Otherwise thescripts Azimuth.py and Elevation.py and Azimuth(Mac).py andElevation(Mac).py, respectively, are the same. They have beentested on Classic Mac (OS 9.1) and Windows (2000 and NT). Otherthan the two Mac-specific scripts noted above, these scripts should beplatform neutral. The function of the Python scripts is the same as the correspondingW5GFE tools. This README file is intended tosupplement, not replace, the original documentation included in W5GFE'stoolkit distribution. To facilitate use of these tools, copies ofBill'sdescriptions have been included with permission, which is greatlyappreciated. These have been included as the original .pod documents, a MacSimpleTextdocument (no file extension), and a generic text file (.txt extension)whichshould be viewable using any text editor, possibly with line separatortranslation. (The generic text documents have Unix lineseparators.) A Python interpreter with the Tk module installed is required. Mac OS 9 users should use MacPython 2.2.3 as the last Mac port ofPython forMac OS 9, Version 2.3 apparently does not include the Tk module. ATcl/Tk executable also needs to be installed if not included in thePythoninstallation, or otherwise installed on your system. The scripts and this document are copyright 2003 by Barry S. Newberger,W5KH. XLNEC.zip NEC.XLS Latest rev uploaded7/12/2002 (copy uploaded 6/27/02 possibly corrupted) NEC.XLS Updated version VB1.10 (1/12/99) nowonline. (6/27/02 set up for easier first time use) NEC.XLS contains pages to handle thefollowing topics: 1 INTRO 2 DECKMAKER 3 VIEWER 4 AUTO NEC 5 DISPLAY 6 ANALYSER 7 DIPOLE 4 STACK 8 DIPOLE 4 STACK(2) 9 FOLDED STACK 10 ROTATABLE FLATSTACK 11 TILTED DIPOLE 12 HELIX and MICRO LOOP 13 TAPERED HELIX and MICRO RING 14 ANTIPHASED HELIXES 15 LPDA 16 LPV 1 17 LPV 2 18 DISCONE 19 BIFILAR 20 SLOTTED RING 21 FOLDED DIPOLE 22 FRANKLIN 23 VERTICAL FRANKLIN 24 LAZY - H 25 PARABOLIC YAGI 26 DIPOLE withPARABOLIC REFL. 27 YAGI MAKER 1 28 YAGI MAKER 2 29 LAUNCHER 30 CORNER REFLECTOR 31 STANDARD GAIN 32 DECK FILE INDEX REVISION HISTORY AN ANTENNA MODELLING PROGRAM, INTEGRATING THE CONVENIENCE ofEXCEL with the POWER of NEC 2 ...for experienced EXCEL users, withaccess to adequate computing power. Release 1.07A ,1/7/98. This version, released privately, has arestricted number of prepared antenna design sheets. The Workbook isnot locked, with the intention that users may add their own antennadesign sheets. No charge is made, nor any responsibility accepted. WHAT NEC.XLS DOES The series of sheets in NEC.XLS allow you toautomate most of the common tasks associated with using a NEC 2 enginefor modelling antennas, and tabulating the results. This programautomates your entireantenna assessment. It will step through up to three design variablesata time , with increments as selected. Having incremented chosenvariables,a NEC INPUT DECK is automatically built. This is fed to a NEC 2 engineautomatically. The Output file from the NEC engine is then read byEXCEL, and a summary of gain, F/B, and antenna input impedance isproduced. If desired, a Thumbnail plot for each design is produced.Finally, a table of results is available, which is sorted by a Figureof Merit based on your weightings. The program thus loops away,building and summarising design changes within your setparameters. (contributed by the author PeterWard <pward@net-tech.com.au> Bairnsdale, Victoria,Australia ) RF1.zip RF2.zip RF3.zip RF4.zip RF1, RF, RF3,RF4.xls Updated 7/12/2002 (copy uploaded 6/27/02 corruped duringtransfer) RF1, RF, RF3, RF4.xls (Release 5.00, 28/02/02) These MICROSOFT EXCEL workbooks form a companion to thecompletely free automated NEC design package which is publically released on this site as XLNEC.ZIP, andcontain practical modules for solving formula and chart related RF problems of interest to antennabuilders. The original RF1 and RF2 workbooks have beenre-organised into four books of appropriate groupings,errors corrected, and new sheets added. RF1.XLS contain propagation related worksheets. RF2.XLS brings spreadsheet assistance to impedance measurement andmatching. RF3.XLS contains pages related to antenna design andbuilding. RF4.XLS solves many of the more general problems met in the RFworkshop. . In particular, there are sheets that will help de-mystify these topics,and more! ANTENNA GAIN CALCULATIONS PATH BUDGETS STUB CALCULATION and PLACEMENT PHASE TILT VSWR CALCS BUILD MMIC IN-LINE AMPS .. that replicate the gaincurves in the HP app notes. BUILD BROADBAND DIRECTIONAL COUPLERS good to 1 gHz,for $20 IMPEDANCE MATCHING POWER DIVIDERS SLOTTED LINES PATTERN TILT on COLINEARS SLUG TRANSFORMERS/MATCHERS IMPEDANCE CHARTING MATCHING with IMPEDANCE CHARTS CABLE LOSS CALCULATION for ANY CABLE RETURN LOSS UNCERTAINTY INDUCTOR and OP-AMP CALCS RSSI CALIBRATION CURVES as a basis for ACCURATE RFMEASUREMENTS ... and a couple of ring-ins. CYLINDER HEAD FLOWBENCH may interestsome The books contain macros. To relieve the fainthearted, they areverified against the latest PC-Cillin Signatures, and directly uploadedONLY to the 'Unofficial NEC Archives' for your protection. The macropages are unlocked, and I encourage modification and suggestion forimprovement. Please pay attention to README.RTF, which gives instruction forthe correct setting up of Excel, and has been a matter of somefrustration to many! The material is offered freely to the users of 'The UnofficialNec Archives' as an encouragement to those of you whose RF experiencegoes beyond just buying the 'latest and greatest'. It is mycontribution to helping'keep the dream alive'! .. As previously, absolutely free, from the workshop of Peter Ward, AX2VCI. Bairnsdale, Victoria, Australia pward@net-tech.com.au xnecview-1.0.tar.gz XNECVIEW X N E C V I E W Version 1.0- A program for previewingNEC2 structure files (Unix/X-windows). Allows zoom in, zoom out,rotation and panning.Should compile on most Unix systems. Includes C source code, MakefileandImakefile and brief README docs. Distributed under GNU GPL. (contributed by the author Pieter-Tjerkde Boer PA3FWMpa3fwm@amsat.org or ptdeboer@cs.utwente.nl) ANTENNA MODELS: EZNEC_FILES Directory containing contributed EZNEC antenna descriptionfiles. SPECIAL COLLECTION: DL5SAYCollection (uploaded 1/14/02) The materials contained in this directory may be of some useto the amateur community. They also represent a remarkable work oflove and devotion on the part of XYL Ursel Kreh, wife to Hartmut Hans Kreh DL5SAY,who died in January 2001, aged 54. I offer them, through the courtesy of Frau Kreh, to theAmateur Community. Please direct any correspondence to: Bill WalkerW5GFE bw@cs.ecok.edu Professor andChairman Department of ComputerScience East CentralUniversity Ada, Oklahoma |
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