What is the best software used for antenna design and. To be used with either nec4 or yagi optimizer modeling programs. Of coarse it is the same mechanism with mininec based frontends i. Antenna modeling links, stealth antennas, lpcad, aprs. Nec2 is a highly capable version of the code which is in the public domain. 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. If it is not visible just press f3, or if the window is visible and the geometry was not updated just select viewreset on the geometry window. And other em electromagnetic modelling software based on. Nec visualization, optimization and sweeping tool the 4nec2 tool is a windows and nec2 or nec4 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 package comes with a number of example models, and there is an extensive indexed help 2 facility with information on all aspects of the program. Eznec is a powerful but very easytouse program for modeling and analyzing nearly any kind of antenna in its actual operating environment.
You describe the antenna and other nearby structures if desired as a group of. Advanced antenna modeling is in every respect the guide to using modeling software for designing, optimizing and evaluating antennas. These models will indicate in the cm lines if they need to use nec4 or 4nec2. How to produce a nec antenna file and what software to. Wire antenna software free antenna modeling software. The following files and links point to necaoyo models of various ham antennas that i have simulated andor tested over the past 30 years as an antenna designer. About 4nec2 antenna modeler the resource is currently listed in in a single category. Mmanagal l is an antennaanalyzing tool based on the moment method, which was introduced in mininec version 3. Antenna modeling software and tutorials electrical. Mininec pro antenna analysis software black cat systems.
View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. Most programs using nec include features that run batches of nec calculations to produce a composite output. The nec simulation model, and sample output, can be found here. In particular, after the free eznec demo program has been installed click help then contents then go to the test drive section. Much of my antenna research work is based on systematic antenna modeling in a version of the numerical electromagnetics code nec. It is an advanced version of the antenna modeling program amp developed in. Antenna modeling software and other utility programs by dan maguire, ac6la autoez automated use of eznec. Can be interfaced to hfwin32 propagation prediction software. With the proliferation of personal computers and affordable even free software, antenna modeling has become a popular amateur activity. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire and surface antennas. Nec was developed by the lawrence livermore national laboratory in the 1970s and is an antenna modelling system for wire and surface antennas.
Over the last two decades, computerized antenna modeling has advanced greatly. Jpole is a free and portable antenna design software for windows. Intel cpu is required on xp and vista systems but not on windows 7 and later. Coax dipole calculator an efficient program to calculate dimensions of coax dipoles. Starting eznec modeling 3 ctu, dayton, 2011 the eznec 1 software, created and marketed by roy lewallen, w7el, can be obtained from. There are other, non nec or mininec kernel based programs. To download and try the software click upmost two links below on the right. Best software for ham antenna simulation, time owned. Software beta testing was provided by a group of fellow amateurs. M mana is an antenna analyzing tool based on the moment method introduced in mininec mini numerical electromagnetics code version 3. In the antenna modeling activity, i use two software, mmanagal and 4nec2. The main category is antenna analysis software that is about software,antenna analysis software, for ham radio operators and hams. Especially designed for antenna modelers, 4nec2 is a simple tool for designing, optimizing and verifying 2d or 3d geometry structures. For a given frequency, the feedpoint impedance is calculated, along with theoretical efficiency.
If you would prefer to work with a hardcopy version of the help you can get a printable version. The program provides ability for changing the language of signs and messages of the program. The major limitation of nec and all modeling software is memory space. Numerical electromagnetics code nec2 unofficial home page.
One disadvantage, however, is that not all types of programs are written for the mac. 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. Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. 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. Yag files can be converted using the msdos based scale. The numerical electromagnetics code nec is a popular antenna modeling software package for wire and surface antennas. Most are based on the well documented numerical electromagnetics code. The numerical electromagnetics code nec has been developed at the lawrence livermore laboratory, livermore, california, under the sponsorship of the naval ocean systems center and the air force weapons laboratory. Nec overview nec2 use a 3 dimensional coordinate system to define antenna structure. You can then run multiple eznec test cases while autoez automatically changes one or more.
Take a look at my tutorial for describing antennas for wlan deployment. As indicated by the name, cocoanec uses the cocoa framework of mac os x. Primary differences between nec engines cocoanec 2. I show you how to model your first dipole, loop and vertical. The following brief notes will provide links to known antenna modeling software providers. Describe your experience with the eznec antenna design software by w7el and tell us why you give it the rating you did required. Nec simulates the electromagnetic response of antennas and metal structures. It is used to design jpole antennas for the desired frequency. Poggio wrote the necmom family of programs at lawrence livermore. The latest version of nec is nec4, which overcomes most of. It was originally written in fortran in the 1970s by gerald burke and andrew poggio of the lawrence livermore national laboratory.
Click here for an offsite explanation of various electromagnetic and antenna modeling techniques including the moment method. 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. Mininec should not be confused with nec, which is a large antenna analysis program written in fortran and designed to run on mainframe computers. Antenna modeling used to be the domain of scientists and engineers with very expensive. The physical design of the antenna is entered such as the lengths of wires and elements. In addition to english default, russian more information about russian mmana available on dl2kqs website. It also includes stateoftheart 3d visualization and a drawing style structure editor.
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. Modeling, a powerful tool in amateur radio, can help you to design antennas and optimize their performances. 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 29038 times. Jpole antenna is pretty easy to build and usually designed by amateur radio operators through this software, you can easily find out four important parameters to build this antenna namely, radiator length, driven stud length, gap space, and. Portrayed below is a complete and selfcontained nec model of one popular form of the endfed halfwave dipole antenna. Source code and windows executables are available to download.
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. Basis for antenna modeling using computer software. Antenna analyzer antenna designer antenna plot antenna analyse analyzer plot new in eznec 5. Another resource for learning is a nice set of eznec tutorials written by g3txq sk here. The basic source code of the computation engine is published as a pds in mininec. Antenna analysis program for windows and macintosh computers. Nec2 is sufficiently accurate for many antenna modeling purposes, but does not work for buried wires or models with wires that are close to ground. Asap antenna scatterers analysis program, is a free general purpose antenna analysis software program for numerical electromagnetic antenna design, modeling and analysis.
Add sources at the feedpoints and, if desired, transmission lines, a. 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. Because in the beginning they were hard paper punchcards. The code was made publicly available for general use and has subsequently been distributed for many computer platforms. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire. I find it far faster for initial entry than xyz entry of coordinates. 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. 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. There are numerous free and proprietary programs available for the task. New modeling objects l networks, transformers, parallel connected loads. Details on how to construct this antenna, both as standalone and as a parabolic dish feed can be found at this link. Antenna modeling software for the mac henry ott consultants. The main attraction of 4nec2 is the graphical entry of antenna models.
Ads software is good for cases when you want to simulate and characterize your antenna design in companion whit other microwave components for example an antenna which is. There is also a sample nec model that you can use to test your setup. Nec4 the latest version of nec is nec4, which overcomes most of the shortcomings with earlier codes. The code was made publicly available for general use and has subsequently been distributed for many computer platforms from mainframes to pcs. Antenna modelling for complete beginners model your own. Nec24 based antenna modeler, analyzer and optimizer. For antenna modeling software, one of the best programs is nec, which is free and available on most computing platforms. It is restricted to antenna elements of a single diameter although some software providers have introduced corrections for linear elements whose diameters varies. 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. As before that punchcards needed to be produced and fed to crude computation machines. Mininec pro is an antenna analysis program for windows and macintosh computers.
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