This enables the designer to specify, say, for an ocf, both of the lengths of the segments as variables. W8io antenna modeling, yagio, long yagi antenna design the w8io antenna site. Yag files can be converted using the msdos based scale. 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 or other mininecbased software. We could say these softwares are user interfaces that handle a data set, namely an antenna geometrie and a. 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 internal calculating engine is automatically called when needed and the results displayed. I try to simulate every antenna i get in my fingers. Nonweb ordering cd only roy lewallen, w7el phone 5036462885. Eznec pro programs are not currently available for web site ordering or direct download. Here is a small collection of eznec files of antennas i have interest in. Mininec pro is an antenna analysis program for windows and macintosh computers. Much of my antenna research work is based on systematic antenna modeling in a version of the numerical electromagnetics code nec.
Eznec antenna software by w7el ordering information. The main category is antenna analysis software that is about software, antenna analysis software, for ham radio operators and hams. This is definitely my goto app for all nec antenna modeling for many reasons. Both versions suffer loss of precision when modeling electrically small structures such as low frequency cave radio antennas. The main category is basic antenna theory that is about antenna theory, basics,design antenna. I find it far faster for initial entry than xyz entry of coordinates. It was originally written in fortran in the 1970s by gerald burke and andrew poggio of the lawrence livermore national laboratory.
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. This is a 3 rd party book and is not connected to arie in any way. We could say these softwares are user interfaces that. Nec 2 is widely available, even for free, and can model wire structures in free space, especially at hf and vhf. Antenna engineering, peter knott tutorial wire antennas wire antenna modelling with nec2 1 numerical electromagnetics code nec the software numerical electromagnetics code nec 2 has been developed in the 1970s in the lawrence livermore laboratory in livermore, california. 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. Wipld offers you cuttingedge software for em and circuit modeling and simulation.
About 4nec2 antenna modeler the resource is currently listed in in a single category. Basis for antenna modeling using computer software. Antenna modeling files american radio relay league. Software beta testing was provided by a group of fellow amateurs. Yw is a specialpurpose program, designed strictly for monoband yagis. Modeling a ground plane antenna with 4nec2 part 1 youtube. It has exactly the same, easytouse interface as eznec, and these additional features. Nec visualization, optimization and sweeping tool the 4nec2 tool is a windows and nec 2 or nec 4 based tool for both the starting and experienced antenna modeler that can be used to create, view and check your antenna geometry structure and generate, display and compare near and farfield radiation patterns. The physical design of the antenna is entered such as the lengths of wires and elements. Mininec pro antenna analysis software black cat systems. The code is based on the method of moments solution of the electric field integral equation for thin wires. Nec4 further allows electrically small antennas to be modeled with better accuracy. Thanks for downloading and reading this definitive guide to the widely popular 4nec2 antenna modeling software.
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 31107 times. In any nec2 program, such as 4nec2, you define your antenna by first building a series of lines. An nec4 license must be purchased from the nec4 holder before purchasing eznec pro 4. You can then run multiple eznec test cases while autoez automatically changes one or more variables between runs. Multinec can be used by itself if you like, but it really shines when used in conjunction with your existing antenna modeling program. But i find this approach quite useful to understand how the issued software works, which is the first step to improved handling of such. How to start modeling antennas using eznec greg ordy, w8wwv ctu, contest university. About antenna modeling files the resource is currently listed in in 2 categories. Although more about the engine than modeling with the engine, the nec 2 unofficial home page is located at. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire and surface antennas. Jul 11, 2019 especially designed for antenna modelers, 4nec2 is a simple tool for designing, optimizing and verifying 2d or 3d geometry structures. Multinec can then calculate the results for a given scenario or can run multiple test cases while automatically changing the model between runs. Full text of some antenna modeling programs see other formats some antenna modeling programs l.
Eznec was developed to work on windows xp, windows vista, windows 7, windows 8 or windows 10 and is compatible with 32bit. The nec simulation model, and sample output, can be found here. When running frequency sweeps, linear or logarithmic style swr, gain. Each antenna design software is slightly different from each other as each software design some specific types of antenna. This course might be appropriate once the material in antenna modeling for beginners is understood. With the proliferation of personal computers and affordable even free software, antenna modeling has become a popular amateur activity. I will also add file export support for 4 bay nec models. Finally they handle the kernels output into charts or plots.
One of 4nec2s most useful tools is integration with voacap so users can see antenna performance under certain. The following brief notes will provide links to known antenna modeling software providers. The main attraction of 4nec2 is the graphical entry of antenna models. Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. Nec2 is a highly capable version of the code which is in the public domain. If you find mistakes in this book, they are all mine. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. We could say these softwares are user interfaces that handle a data set, namely an antenna geometrie and a command to compute something to the kernel, which does the real work. Modeling, a powerful tool in amateur radio, can help you to design antennas and optimize their performances. An nec 4 license must be purchased from the nec 4 holder before purchasing eznec pro 4. Nec 4 is not in theory available to the public, but having worked in a navy lab for 30 years that did antenna work among other things, and still having a security clearance, i was able to borrow a doubleprecision copy of the basic code, but.
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 29008 times. 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. 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. Antenna modeling for beginners american radio relay league. The most popular versions among the software users are 5. It also can model insulation around the wire, which is very useful for modeling antennas in water. These models will indicate in the cm lines if they need to use nec 4 or 4nec2. The geometry tab in the 4nec2 edit window is where you will define your antennas structure. You can then run multiple eznec test cases while autoez automatically changes one or more. Our antivirus analysis shows that this download is virus free.
Mininec should not be confused with nec, which is a large antenna analysis program written in fortran and designed to run on mainframe computers. I find the clike programming tool much more flexible and easier to use than the eznecautoez kludge for automatic optimizations. For a given frequency, the feedpoint impedance is calculated, along with theoretical efficiency. Advanced antenna modeling is in every respect the guide to using modeling software for designing, optimizing and evaluating antennas.
Apr 30, 2017 in the antenna modeling activity, i use two software, mmanagal and 4nec2. Figure 1a nec win plus azimuth pattern for a dipole at 70 feet above average ground at 7. Models can include wires buried in a homogeneous ground, insulated wires and impedance loads. Intel cpu is required on xp and vista systems but not on windows 7 and later. 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. W7el also makes available eznec, a segmentrestricted version of nec2, and elnec, a version of mininec 3. M mana is an antenna analyzing tool based on the moment method introduced in mininec mini numerical electromagnetics code version 3. This link is listed in our web site directory since friday mar 9 2007, and till today antenna modeling files has been followed for a total of 2495 times. Best software for ham antenna simulation time owned. Antenna modelling software based on nec2, nec4, mininec kernels is a frontend to the named kernel. To download and try the software click upmost two links below on the right.
Group by default called antenna book software containing all the icons for the antenna book programs. I purchased a license for nec 4 from llnl and it integrated seamlessly. Antenna modeling used to be the domain of scientists and engineers with very expensive antenna ranges covering acres and acres of land strewn with expensive equipment. 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. As indicated by the name, cocoanec uses the cocoa framework of mac os x.
Nec2 is sufficiently accurate for many antenna modeling purposes, but. Numerical electromagnetics code nec2 unofficial home page. What is the best software used for antenna design and simulation. In both eznec pro programs, the antenna description is entered using the popular eznec interface method of spreadsheetlike entry and powerful editing. Antenna model is there a general consensus of the best of these. Eznec pro2 nec2 based analysis program eznec pro4 nec4 based analysis program helicopter model. Antenna modeling software and other utility programs by dan maguire, ac6la autoez automated use of eznec. In complex antenna models, the variable name can be reused in multiple locations. Over the last two decades, computerized antenna modeling has advanced greatly. About nec win pro the resource is currently listed in in a single category. Nec 4 the latest version of nec is nec 4, which overcomes most of the shortcomings with earlier codes. The detailed, always available, help style manual has antenna modeling tips as well as full instructions on how to get the most from eznec.
The web is littered with dead ends and derivitives. When i became interested in wire antennas for voice communications at higher frequencies a couple of years ago, i looked for some suitable modeling software. Nec2 4 based antenna modeler, analyzer and optimizer. A handson tutorial a modeling course by lb cebik, similar to antenna modeling for beginners but written assuming a higher level of background. The nec files may be used with any of the nec2 or nec4 programs such as 4nec2, gnec or cocoanec, however some of them with tapered elements may only be simulated accurately by nec4 or other mininecbased software. Wire antenna software free antenna modeling software. Each line will be assigned a reference number, a number of segments, and a radius. The unofficial numerical electromagnetic code nec archives. Apr 21, 2019 4nec2 is a free public domain antenna modeling program. Mininec pro antenna analysis software antenna analysis program for windows and macintosh computers. Especially designed for antenna modelers, 4nec2 is a simple tool for designing, optimizing and verifying 2d or 3d geometry structures. Nec24 based antenna modeler, analyzer and optimizer.
But it is only a small fraction of all the files i have produced. Getting settled and getting started figure 2an eznec elevation pattern for a dipole at 70 feet above average ground at 7. It is restricted to antenna elements of a single diameter although some software providers have introduced corrections for linear elements whose diameters varies. Is it worth paying more for some of the features, e. Here is a list of best free antenna design software for windows.
Click here for an offsite explanation of various electromagnetic and antenna modeling techniques including the moment method. Nec 4 further allows electrically small antennas to be modeled with better accuracy. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Modeling a 58 wavelength linear loaded antenna for the cb band and tuning it in the modeling software. Nec 3 does the same but can also model wires buried in the ground or penetrating from the air into the ground.
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. Eznec was developed to work on windows xp, windows vista, windows 7, windows 8 or windows 10 and is compatible with 32bit systems. Eznec pro2 nec 2 based analysis program eznec pro 4 nec 4 based analysis program eznec pro2 and pro 4 are windows applications eznec pro v. It has no time limit or other restrictions, and its free. These models will indicate in the cm lines if they need to use nec4 or 4nec2. In the antenna modeling activity, i use two software, mmanagal and 4nec2. To do this, advertisers submit their antenna models for verification by the arrl.
Multilingual mm antenna analyzer ms windows mmanagal basic is still free for amateur radio use what happened to the mmama program. The application is free and it can be downloaded from the download page which can also be accessed by using the download tab button at the top of this page. An html version of the users manual for nec has been created by peter richeson. Mininec software is powerful, but you need to know its limitations. Youll find it interesting and educational, and youll get many useful tips about antennas and modeling from the extensive online manual. Nec numerical electromagnetic code, written by gerald burke, is a popular antenna modeling code for wire and surface antennas and scatterers. Details on how to construct this antenna, both as standalone and as a parabolic dish feed can be found at this link. In this tutorial i will explain what a nec antenna modelling software is and how to use the 4nec2 antenna modelling software. 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.
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