This course might be appropriate once the material in antenna modeling for beginners is understood. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire. Nec based antenna modeler and optimizer by arie voors 4nec2 is a completely free nec2, nec4 and windows based tool for creating, viewing, optimizing and checking 2d and 3d style antenna geometry structures and generate, display andor compare nearfarfield radiation patterns for both the starting and experienced antenna modeler. Intel cpu is required on xp and vista systems but not on windows 7 and later. Here is a small collection of eznec files of antennas i have interest in. Rotate the antenna display and zoom in for details. Details on how to construct this antenna, both as standalone and as a parabolic dish feed can be found at this link. Each antenna design software is slightly different from each other as each software design some specific types of antenna.
In both eznec pro programs, the antenna description is entered using the popular eznec interface method of spreadsheetlike entry and powerful editing tools, or eznec pro can directly read your existing nec description file. To install the 4nec2 package, follow the below steps. Over the last two decades, computerized antenna modeling has advanced greatly. The utility nec 2 for mmana is intended for calculation of antenna models made and optimized in program mmana. What do hobbyists use if they have a desireneed to simulate a pcb antenna for say sub 1ghz frequencies. Mininec pro is an antenna analysis program for windows and macintosh computers. The only difference between the demo and standard programs is that the demo program allows only 20. It also displays certain information about your antenna, including. A handson tutorial a modeling course by lb cebik, similar to antenna modeling for beginners but written assuming a higher level of background. The main category is antenna analysis software that is about software, antenna analysis software, for ham radio operators and hams. Eznec was developed to work on windows xp, windows vista, windows 7, windows 8 or windows 10 and is compatible with 32bit systems. Antenna modelling for complete beginners model your own. One disadvantage, however, is that not all types of programs are written for the mac.
The following brief notes will provide links to known antenna modeling software providers. I show you how to model your first dipole, loop and vertical. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire and surface antennas. Antennex antennex is a online magazine dedicated exclusively to everything related to antennas. Click here for an offsite explanation of various electromagnetic and antenna modeling techniques including the moment method. I try to simulate every antenna i get in my fingers. Eznec is on par with any number of other professional for sale pieces of software, but it doesnt make sense to recommend it first. Software beta testing was provided by a group of fellow amateurs. About nec win pro the resource is currently listed in in a single category. Modeling, a powerful tool in amateur radio, can help you to design antennas and optimize their performances. Basis for antenna modeling using computer software originally written in fortran in the 1970s by gerald burke and andrew poggio of the lawrence livermore national laboratory the code is based on the method of moments solution of the electric field integral equation efie. How to produce a nec antenna file and what software to use it with.
A page showing some of the antenna modeling software out there a person can use to help model an antenna for performance on many levels. A beginners tutorial for 4nec, a nec2 distribution. Antenna modeling files introduction in january, 1998, the arrl board of directors changed the arrl advertisementacceptance policy to permit the advertising of antenna gain figures for antennas whose performance can be accurately modeled using either nec 4 or yagi optimizer modeling programs. Nec simulates the electromagnetic response of antennas and metal structures. Antenna descriptions and pattern plots are easily saved and recalled for future analysis. An oggie asked me to model what happens if you attach a halfwavelength wire to the end of an existing dipole. Poggio wrote the necmom family of programs at lawrence livermore. The detailed, always available, help style manual has antenna modeling tips as well as full instructions on how to get the most from eznec. Primary differences between nec engines cocoanec 2. W7el also makes available eznec, a segmentrestricted version of nec2, and elnec, a version of mininec 3. Nec2 for mmana the utility nec2 for mmana is intended for calculation of antenna models made and optimized in program mmana and for construction and simulation of antenna models using input language nec2 and based on mmana models. M mana is an antenna analyzing tool based on the moment method introduced in mininec mini numerical electromagnetics code version 3. But i find this approach quite useful to understand how the issued software works, which is the first step to improved handling of such. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation.
Antenna analysis program for windows and macintosh computers. You can then run multiple eznec test cases while autoez automatically changes one or more. Especially designed for antenna modelers, 4nec2 is a simple tool for designing, optimizing and verifying 2d or 3d geometry structures. Yagio is similar to lpcad, it uses keyboard commands instead of a mouse menu. Figure 1a necwin plus azimuth pattern for a dipole at 70 feet above average ground at 7. Applying a feed to any antenna in nec or any electromagnetic simulation software is about a simple a task as can be conceived by placing a source of near infinitesimal size inline with a dipole element. About 4nec2 antenna modeler the resource is currently listed in in a single category. Another antenna analysis software alternative to numerical electromagnetic code nec for analyzing insulated or bare thin wire antenna structures over a lossy or perfect groundplane based on the moment method. Nec24 based antenna modeler, analyzer and optimizer. Nec model library the following files and links point to nec aoyo models of various ham antennas that i have simulated andor tested over the past 30 years as an antenna designer.
Eznec and other similar antenna modeling packages, with few exceptions, are wrappers for the nec numerical electromagnetics code engines. Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. The nec files may be used with any of the nec 2 or nec 4 programs such as 4nec2, gnec or cocoanec, however some of them with tapered elements may only be simulated accurately by nec 4. Multiple patterns can be superimposed on a single graph for comparison. An absolute must for true antenna enthusiasts who need to get the most out of their antenna software, especially those at ease in a more technical environment.
Computer antenna modeling offers a practical way to save time and effort in the selection of antennas for the operators requirements prior to actual construction. If the cd is ordered from the web, the program may also be downloaded for no extra charge. You can build your model via the user interface or import existing eznec, nec, antenna model teri software, elnec, mmana, ao, or nec wires format models. Antenna modeling software and other utility programs by dan maguire, ac6la autoez automated use of eznec. Download is available by web site credit card order only. The code was made publicly available for general use and has subsequently been distributed for many computer platforms from mainframes to pcs. Apr 30, 2017 in the antenna modeling activity, i use two software, mmanagal and 4nec2. Of coarse it is the same mechanism with mininec based frontends i. Mininec should not be confused with nec, which is a large antenna analysis program written in fortran and designed to run on mainframe computers. The main attraction of 4nec2 is the graphical entry of antenna models. Nec2 is a highly capable version of the code which is in the public domain. Antenna modelling software based on nec2, nec4, mininec kernels is a frontend to the named kernel.
In the antenna modeling activity, i use two software, mmanagal and 4nec2. Thanks for downloading and reading this definitive guide to the widely popular 4nec2 antenna modeling software. Starting eznec modeling 9 ctu, dayton, 2011 nec2 has the desirable property that it is free, in the public domain, can be distributed and used without a software license, and can be used around the world. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Here is a list of best free antenna design software for windows. The nec files may be used with any of the nec 2 or nec 4 programs such as 4nec2, gnec or cocoanec, however some of them with tapered elements may only be simulated. Dec 14, 2019 the most popular versions among the software users are 5. Describe your experience with the eznec antenna design software by w7el and tell us why you give it the rating you did required. Modeling a 58 wavelength linear loaded antenna for the cb band and tuning it in the modeling software. You can then run multiple eznec test cases while autoez automatically changes one or more variables between runs.
Beezleys yo or ya programs and with nec based programs, such as eznec, nec win plus or. Nonweb ordering cd only roy lewallen, w7el phone 5036462885. This window can be brought up by hitting the edit nec input file button on the main window. Wire antenna software free antenna modeling software. Multilingual mm antenna analyzer ms windows mmanagal basic is still free for amateur radio use what happened to the mmama program. Antenna modeling software for the mac henry ott consultants. This window can be brought up at any time by hitting f3.
Currently available software makes computer antenna modeling for antenna projects easily accessible to the average amateur radio operator. Ive downloaded qantenna and 4nec2 to try and model my antenna and see what i can do, however neither of these programs allow you to make an antenna as far as i can tell they require you to import an nec file. Mininec software is powerful, but you need to know its limitations. To be used with either nec 4 or yagi optimizer modeling programs. It also shows where your sources are by representing them with purple circle.
This is a 3 rd party book and is not connected to arie in any way. This link is listed in our web site directory since saturday aug 3 2002, and till today 4nec2 antenna modeler has been followed for a total of 29021 times. It was originally written in fortran in the 1970s by gerald burke and andrew poggio of the lawrence livermore national laboratory. Eznec pro programs are not currently available for web site ordering or direct download. I find it far faster for initial entry than xyz entry of coordinates. Numerical electromagnetics code nec2 unofficial home page. But it is only a small fraction of all the files i have produced. An html version of the users manual for nec has been created by peter richeson. Best software for ham antenna simulation, time owned.
Portrayed below is a complete and selfcontained nec model of one popular form of the endfed halfwave dipole antenna. To download and try the software click upmost two links below on the right. One of 4nec2s most useful tools is integration with voacap so users can see antenna performance under certain. Jul 11, 2019 especially designed for antenna modelers, 4nec2 is a simple tool for designing, optimizing and verifying 2d or 3d geometry structures. Advanced antenna modeling is in every respect the guide to using modeling software for designing, optimizing and evaluating antennas. To be used with either nec4 or yagi optimizer modeling programs. Cebik, w4rnl much of my antenna research work is based on systematic antenna modeling in one or another version of the numerical electromagnetics code nec. As before that punchcards needed to be produced and fed to crude computation machines. We could say these softwares are user interfaces that. The nec simulation model, and sample output, can be found here.
It will help you understand antenna modeling and evaluate the antenna software available. Antenna modeling files american radio relay league. Is there a free piece of software that will make a nec file for a simple quarter wave whip antenna. Best software for ham antenna simulation time owned. Nec numerical electromagnetics code is a popular antenna modelling system for wire and surface antennas and simulates the electromagnetic response of antennas and metal structures. I use mmanagal for quick and easy modeling because the interface is very intuitive, while i use 4nec2 for indepth modeling because the tool is more complete than mmanagal. The embedded nec 2 engine is significantly faster than nec 4. Antenna modeling for beginners american radio relay league. The physical design of the antenna is entered such as the lengths of wires and elements. With the proliferation of personal computers and affordable even free software, antenna modeling has. This link is listed in our web site directory since sunday dec 20 1998, and till today nec win pro has been followed for a total of 31122 times. Because in the beginning they were hard paper punchcards. This makes it easier to create wire models using formulas.
Much of my antenna research work is based on systematic antenna modeling in a version of the numerical electromagnetics code nec. How to produce a nec antenna file and what software to use. If im too fast for you, sonsider clicking the gear icon normally lower right on a browser and. W8io antenna modeling, yagio, long yagi antenna design the w8io antenna site. At 12 feet above the ground, the coupling loop needed to be resized to 1. The following files and links point to nec aoyo models of various ham antennas that i have simulated andor tested over the past 30 years as an antenna designer. Getting settled and getting started figure 2an eznec elevation pattern for a dipole at 70 feet above average ground at 7. In this tutorial i will explain what a nec antenna modelling software is and how to use the 4nec2 antenna modelling software. We could say these softwares are user interfaces that handle a data set, namely an antenna geometrie and a.
Antenna modeling software for the mac i like using mac computers because of the inherent stability of the underlying unix operating system, and the immunity to most viruses. Eznec antenna software by w7el ordering information. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8. Oct 21, 2019 in this tutorial i will explain what a nec antenna modelling software is and how to use the 4nec2 antenna modelling software. Available by direct download from the web 14 mb, and on cd. Yag files can be converted using the msdos based scale. See the pattern and antenna currents on the same color 3d display as the antenna.
You can save these designs in 5 different formats yio used by yagio, nec used by 4nec2, yag yo, mma mmanagal and yc6 used by yagicad. Here is a zipped gnumeric source file which is a gzipped xml file for a dipole which, when exported from gnumeric as a space delimited ascii file with no quoting gives you an ascii nec file to feed in to nec2c. For a given frequency, the feedpoint impedance is calculated, along with theoretical efficiency. These engines date back to the 1970s, and were written in fortran to run on mainframe computers. You can also print the results to your windows default printer.
Mininec pro antenna analysis software black cat systems. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Its demo software not built to model antennas built to testdrive the actual software menus, graphical capability etc. Full text of some antenna modeling programs see other formats some antenna modeling programs l. It is restricted to antenna elements of a single diameter although some software providers have introduced corrections for linear elements whose diameters varies.
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