Besides transmitter and receiverantennas and locations, the itshf propagation prediction software. Nec4 can model ground with actual depth below ground. Nec numerical electromagnetic code, written by gerald burke, is a popular antenna modeling code for wire and surface antennas and scatterers. Another option i have been considering is buying this antenna amp kit. Take a look at my tutorial for describing antennas for wlan deployment. Other modeling packages with both nec2 and nec4 price points have a.
The 4nec2 tool is a windows and nec2 or nec4 based tool for both the. Coax relay switching most people find it nice to use 2 coax runs if an upper pre amp will be used. From the original nec, newer versions have been developed, nec2, nec3 and nec4. Microstripes is the most powerful electromagnetic simulation software for microwave, antenna design and installed antenna performance. Link here for information and instructions on how to run nec2 in a microsoft windows environment. Whatever the case, amplifying or boosting the signal is a potential fix to your reception issue. Addup the total amount of signal decibel loss that will occur as the signal travels from the tv antenna to the tv with the longest cable run. Using a vhfuhf antenna on a vhfonly or uhfonly amp will result in one of. Let me first say that the construction of the amplifier and power supply are first rate. Product title hdtv antenna, 2020 new indoor digital hdtv antenna. To download and try the software click upmost two links below on the right. 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. Over the years many individuals have been contributors to amp and nec, and. Shop and learn more about tv antenna amplifiers, including preamplifiers and distribution amplifiers.
Models can include wires buried in a homogeneous ground, insulated wires and impedance loads. Web research shows that this is also affecting many other programs. This link is listed in our web site directory since sunday dec 20 1998, and till today necwin pro has been followed for a total of 31107 times. We perform the design work using the latest professional full3d electromagnetic modelling software. The code was made publicly available for general use and has subsequently been distributed for many computer platforms from mainframes to pcs. My antivirus software says eznec is infected with a virus. Best software for ham antenna simulation time owned.
This enables us to accurately include the influence of the boom, insulators, baluns, feed point, connectors. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. There is also a sample nec model that you can use to test your setup. The following simple examples barely scratch the surface of what can be done with this software. Nec24 based antenna modeler, analyzer and optimizer. Ansof simulation software for modeling wire antennas and scatterers. Since 1988 we have been manufacturing amateur radio antennas, preamplifiers and bandpass filters all of which have unparalleled performance and an excellent reputation for strength, reliability and longevity. The main category is antenna analysis software that is about software,antenna analysis software, for ham radio operators and hams. We do not use amateurish programs like eznec pro4 nec4.
The modification was to use a current rather than voltage source and to set the feedpoint current at 1 amp. Mininec pro is an antenna analysis program for windows and macintosh computers. 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. About necwin pro the resource is currently listed in in a single category. So when i see posts on these forums or elsewhere where a ham is struggling with rfi with certain unbalanced antenna installations and is running w to 1500w im not really surprised. You do this by selecting settings nec engine manual select appendix a. Honestly, over 20 years ago i used to directly manipulate data files that. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire. Navigate into the nec4dst folder that was created inside the oldnec folder, and open the nec4d.
Antennas, band pass filters, low noise yagi, preamplifiers, splitters antennas amplifiers is celebrating our 30th anniversary. Essentially nec based software is still using decades old technology with decades old limitations. Figure 1a necwin plus azimuth pattern for a dipole at 70 feet above average ground at 7. This produced the antenna modeling program, or amp, which was. The embedded nec2 engine is significantly faster than nec4. Numerical electromagnetics code nec2 unofficial home page. Theres the thing, the outside of the coax has to carry current, or there is no other half of the antenna, and therefore no radiation. Intel cpu is required on xp and vista systems but not on windows 7 and later. You can then run multiple eznec test cases while autoez automatically changes one or more. Radiation pattern shown is typical figure8 pattern. The latest version of nec is nec4, which overcomes most of.
I am the second or third owner of my antenna works amplifier. The number of false positive virus reports has been steadily increasing for various files in all versions of eznec, including ones which have been in use and unchanged for many years. Moments code started as an advanced version of the antenna modeling program amp. Details on how to construct this antenna, both as standalone and as.
The physical design of the antenna is entered such as the lengths of wires and elements. This enables us to accurately include the influence of the boom, insulators, baluns, feed point connections, etc, to the level which is impossible to do with legacy. Earliest and longest legacy of software codes for antenna modeling. Antenna modeling for radio amateurs foothills amateur radio.
Hook up load or antenna to a high power meter, and hook up the meter to the amplifier output. Preamplifier installation tips and help dennys tv antenna. Using software for antenna desing is useful because. Selecting the correct tv antenna amplifier is a simple mathematical process.
Nec4 is the latest version of the numerical electromagnetics code. Winegard lna100 boost tv antenna amplifier, hdtv signal booster, hd digital vhf uhf amplifier, indoor hdtv ultra low noise amp usb power supply usa. Amplify a digital tv signal put a little electricity back into your digital tv signal. Of course the difference being the commercial amp market has a lot more amps in the 6001500 watt range which. Founded in 1998, the company was acquired by pegasystems in 20. This rectangular microstrip patch antenna is designed for wireless communication application that works at 2. Wire antenna software free antenna modeling software. Later versions, nec3 and nec4, are available after signing a license.
The largest antenna and ham equipment manufacturer in serbia est. With the proliferation of personal computers and affordable even free software, antenna modeling has become a. It also has a wide angle of beam in its radiation pattern. I recently got a second hand clearstream 2v antenna. 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.
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. The proven and unique processes for collaboration, fair dealing and good project management that are inherent in the nec philosophy remain in this evolved edition. Nec4 antenna software nec based antenna modeler and. How to produce a nec antenna file and what software to. Getting settled and getting started figure 2an eznec elevation pattern for a dipole at 70 feet above average ground at 7. Hf traps, metric conversions op amps qra locator to latitudelongitude. 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. Finally they handle the kernels output into charts or plots. Add the signal loss from the cable length and any splitters between the antenna and the tv. Antenna modeling software and other utility programs by dan maguire, ac6la autoez automated use of eznec. Hf traps, metric conversions op amps qra locator to latitude longitude. Nec4 is not in theory available to the public, but having worked in a navy lab for 30 years that did antenna work. Hook up the swrwattmeter to the tuned input box on the back of the amplifier. These devices are typically needed when you have long 60 feet or more cable runs, use one antenna for multiple tv sets, or want to receive fringe signals.
Can i use a power antenna wire for remote turn on of my amp. An amplifier is a general purpose term for any circuit or device that keeps the characteristics of a signal the same while increasing the amount of current. Antenna, electromagnetics and transmission line simulators are a special breed of. Orca ax909g5 variable digital outdoor tv antenna 1080p i am somewhat skeptical but i can buy the entire antenna kit including a 40db amp for 65 dollars on amazon. It is used to model thin wire antennas and 3d models constructed of thin wires. Analysis of thinwire structures in the presence of finite ground. New thread to debate v4000 page 16 worldwidedx radio. Test equipment, racks, cables, adapters, amplifiers, cables, rf switches, eesof.
Contracts the nec4 suite of contracts builds upon the success of the nec3 contracts. Mccormack and made available as free downloadable software in the fortran source code and pc executables by r. The results obtain that microstrip patch antenna can be used as client antenna in computer and workable antenna for wireless fidelity. Antenna modelling software based on nec2, nec4, mininec kernels is a frontend to the named kernel. But there are some that it isnt grabbing completely.
Crossis a methodofmoment antenna analysis program with a more englishlike input system. The numerical electromagnetics code, or nec, is a popular antenna modeling system for wire and surface antennas. A uhf antenna amplifier takes in uhf signal then puts out a much stronger signal. Mininec pro antenna analysis software black cat systems. The following brief notes will provide links to known antenna modeling software providers. After this, manually specify the name for the fixed nec4 engine to use. It runs under windows and can be used to simulate, analyze and optimize wire antennas, beams, verticals, etc. It is an advanced version of the antenna modeling program amp developed in the early 1970s. Asap, antenna scatterers analysis programoriginally developed by j. About 4nec2 antenna modeler the resource is currently listed in in a single category. 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. Choosing the right tv antenna amplifier solid signal. For any folks looking to install their own tv amp, this is the guide you need.
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