This link is listed in our web site directory since thursday oct 1 2015, and till today w3edp antenna has been followed for a total of 1935 times. Id describe it as an 85 foot wire a 68ft top and a 17ft feedline, and you either usedont use a. In my quest to find an easytodeploy allband antenna, i have experimented extensively with the w3edp wire antenna. Buddipole has models for various antennas in their portfolio for eznec.
Mininec pro is an antenna analysis program for windows and macintosh computers. Models can include wires buried in a homogeneous ground, insulated wires and impedance loads. As the understanding of antenna operation was as well understood in 1936 as it is now with software like eznec, etc, the w3edp antenna was. A simple matching unit is needed to couple the wire to the rig and a counterpoise is required for some bands, however there is room for experimentation here. The senior fulllength w3edp, as originally described qst march 1936, pp. In this video, david casler ke0og turns to eznec antenna modeling software to get a definitive answer. This is an antenna with a 84 foot wire on one side of the output port and a 17 foot wire on the other side. Modeling antennas with eznec adventures in amateur radio. 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.
At first, antenna modeling software is difficult to understand, primarily because of the cartesian coordinate method used. Antenna modeling software from dan maguire ac6la multinec, moxon generator, tldetails, etc. Amateur radio station wd8rif fielddeployable antennas. Evolving from a simple endfed marconi for 80m, the idea was to use the opposing. I try to simulate every antenna i get in my fingers. The tant instruction manual goes into great detail regarding the use of eznec. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation.
Chameleon cha hybrid micro portable hf antenna base 1. 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. G7fek limited space antenna g7fek multiband nested marconi antenna 2008 version rev 5 this antenna was first conceived as a simple dual band antenna in 1988, in an attempt to achieve sensible dual band operation in a small garden of 14m 46 ft length. But ultimately the w3edp is nothing more than a socalled random wire antenna. There are other versions with more elaborate features which, naturally, cost more, but i have found version 5. An extensive w3edp antenna study w0ese and picnic table w3edp antenna there seems to be a lot of discussion out there about the w3edp antenna. Antenna descriptions and pattern plots are easily saved and recalled for future analysis. Wire antenna software free antenna modeling software. Portable endfed multiband hf antenna with no wire on. Use the 17 foot length and one 84 foot length to whip up a w3edpendfed zepp, or use the two 84 foot lengths for an ffd. 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. Antenna software by w7el eznec, eznec pro, elnec antenna software from qrz cubical quad antenna calculator from kd6dks. For the past couple of weeks, ive been playing with endfed wire antennas. The code is based on the method of moments solution of the electric field integral equation for thin wires.
Software piracy is theft, using crack, password, serial numbers, registration codes, key generators, cd key, hacks is illegal and prevent future development of eznec arrl v. Kb0ykis radio zone online jpole designer, online yagi designer, the copper cactus double jpole pcaad 2. The w3edp, a variation of a true zepp, is an interesting antenna and was described in practical wire antennas by john d. The w3edp antenna, when examined fig 33, looks something like an endfed zepp with a 68ft 20. See the general description of eznec elnec products under nec4 above. Multiple patterns can be superimposed on a single graph for comparison. This link is listed in our web site directory since monday jan 31 2011, and till today w3edp hf antenna has been followed for a total of 3580 times. The w3edp antenna is a design developed in 1936 and has found recent popularity with the summits on the air group and also qrp enthusiasts. With the proliferation of personal computers and affordable even free software, antenna modeling has become a. Portrayed below is a complete and selfcontained nec model of one popular form of the endfed halfwave dipole antenna. Shareware junction periodically updates pricing and software information of eznec arrl v. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8. 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. Well in the early days of amateur radio nearly everything was matched by either, a gamma match, beta match, hairpin match, 75 ohm 14 wave coax match, or one of a few hundred other home made matching devices.
Eznec simulations of antennas and dual and quad antenna. The main category is endfed antenna that is about endfed antenna projects and plans. Ive tried a few types but havent managed to find one that works for me, especially on the lower bands like 40m and 80m. The mmanagal model appears to be far more realistic when compared to the real antenna and is recommended for a more detailed assessment, plus the full software is free. Here is a small collection of eznec files of antennas i have interest in. Its primarily geared to the use of eznec demo programs, specifically the version 5 demo. About w3edp hf antenna the resource is currently listed in in a single category. Eznec is antenna simulation software written by roy lewallen, w7el. Lots to learn with this but already giving some good insight into the designs. The eznec model shows less interaction than actually occurs in real life, but still gives a good idea as to how the antenna works. The radiation pattern file can be produced by either eznec or 4nec2.
Theres been a lot of recent interest on qrpl in the w3edp antenna. It computes a far field table output from a text file which contains the simulated beam antenna radiation pattern. The main category is w3edp antennas that is about w3edp endfed antenna. Posted on august 15, 2016 by jose va3pcj the senior full. Analysis of thinwire structures in the presence of finite ground. Windows versions of eznec software are under development. See the pattern and antenna currents on the same color 3d display as the antenna.
As a general rule, get it up as high as you can seems to work for most dipole installations. According to moxon, because of the very high impedance i. Hi tom, from practical wire antennas, by john d heys, b3bdq, page 33. Starting eznec modeling 3 ctu, dayton, 2011 the eznec 1 software, created and marketed by roy lewallen, w7el, can be obtained from. Eznec 2, the basic version of the nec2 programs, offers 3d plots with 2d slicing, groundwave output, stepped diameter correction, and numerous shortcuts to antenna geometry modification. On the amazon kindle and amazon paperback web pages the look inside feature may be used to show the table of contents, other front matter, and the first few chapters. Leave a comment posted by rjbono on february 17, 2015. I was able to work all over the uk on 160m and 80m using the 85ft main wire and 17ft counterpoise with good signal strength reports. Antenna modeling software and other utility programs by dan maguire, ac6la autoez automated use of eznec. Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. About 2 years ago i made up a w3edp antenna using some left over wire and a 4.
How to produce a nec antenna file and what software to. An often asked antenna question is how high should a dipole be. Numerous example models are analyzed in detail and many practical tips and tricks are included. The w3edp antenna has been available for very many years. Basis for antenna modeling using computer software. While more elaborate antennas than those discussed here can be modeled and the program will run them, on very. Though it is not as accurate with antenna temperature and gt as the tant program in combination with reading the 3d pattern from eznec or 4nec2. A new trend in antenna modeling software is to build antennas that are resonant. Describe your experience with the eznec antenna design software by w7el and tell us why you give it the rating you did required. Intel cpu is required on xp and vista systems but not on windows 7 and later.
The w3edp end fed wire antenna lends itself readily to qrp and portable operation. I used a w3edp antenna with an ft817 and a zm4 z match atu. You can then run multiple eznec test cases while autoez automatically changes one or more. This item w3edp antenna multiband hf antenna 8010m. However, in order to maintain a balance an equal amount of length is required to be added to the antenna itself. Before i get into the nittygritty details, let me first make a distinction between endfed halfwave antennas, such as the ones sold by lnr precision and endfed wires that use some kind of tuning to achieve a 50. About w3edp antenna the resource is currently listed in in a single category. 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. Rotate the antenna display and zoom in for details. Yagio is similar to lpcad, it uses keyboard commands instead of a mouse menu. Survey visualize your backyard antenna modeling overview antenna analyzers horizontal antennas vertical antennas links backyard antennas march 11, 2017 dave redfearn, n4elm.
968 1223 141 1590 1436 156 922 1128 1511 484 481 115 481 574 1591 1474 70 1073 84 1086 1619 763 1300 311 129 274 722 832 283 495 742