The Broadband Double-Bazooka Antenna — How Broad Is It? 18-3 Unfortunately, the reactance pro-vided by the stubs in the coaxial dipole is in parallel with the dipole terminal im-pedance, not in series. My transmission line really does tune my antenna system. To support the starting antenna modeler, in version 5. the EZNEC box (Open, Save As, Ant Notes, Currents, Src Dat, etc. Predicted EZNEC impedances were quite close to measured values, but there was a consistent "frequency offset" which I could not account for; it was equivalent to about 1. EZNECmobileAnt EZNEC Modeling of a Mobile Antenna Jim Andrews, KH6HTV My primary ham station here in Hawaii now consists of mobile operation from my 1996 Audi convertible. com has ranked N/A in N/A and 302,790 on the world. The NEC File Extension can be viewed on the Windows operating system. Rotate the antenna display and zoom in for details. In working through this assignment, you will take snapshots of SWR plots and 2-D & 3-D plots of antenna patterns. I wil be happy to send a copy of the EZNEC file for a properly designed J pole. AutoEZ will invoke EZNEC and request that EZNEC a) open the temporary file just built, b) run it through the EZNEC calculating engine, and c) produce output files containing the results of the calculation. Short video demo of the EZNEC v5. Other links and articles. Before constructing the antenna I ran the EZNEC files and found them to be reasonably accurate, except in one major area, which is the modelling of closely spaced. Illustrates one of the BETTER 4-Bay Antenna designs. 160m/80m Broadband Antenna by K5GP A presentation to CTDXCC September 22, 2008 The 160m/80m broadband antenna design objectives were to have: 160 and 80 m antennas since I had no antennas for these bands, the antennas had to be hidden because of covenant restrictions, open wire feeders would be too visible to be allowed,. This section is then followed by three coaxial traps. wb3gck zmatch. 0 VSWR to 1:1 - the idea being that at 3. A description of my 3 Element Antenna for 28 MHz with EZNEC file and diagrams. Also includes ATSC/NTSC Tuner Specs and Preamp Specs, plus a DTV Signal Overload Calculator and a Third Order Intermod Calculator. antenna calculation software. Zenith, Azimuth, Gain at 1 degree. zip from 4shared. Resources listed under HexBeam Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Random Wire Antenna Lengths. 4nec2 Antenna Creating Software 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 and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler. I've played around with EZNEC briefly before, but not enough to have really learned anything useful. Comparison with Dipole. EZNEC for Windows, both in basic and professional versions, is available from Roy Lewallen. 3 inch correction to my EZNEC models. The two leaders are EZNEC (= not free of charge) and 4NEC2 (= completely free). Before retiring and moving to the Ozarks, zoning restrictions and power line proximity limited my antenna choices to wire antennas installed at relatively low heights. 0 is included with the 20th Edition and EZNEC-ARRL v. This site is protected against hot linking due to abuse so if you have trouble downloading the Eznec files by direct click contact k7tjr at arrl. org  The ARRL Antenna Book for Radio Communications: Antennas, Transmission Lines, and Radio Wave Propagation, 22nd Edition, Chapter 8 “Antenna Modeling”  Eike Barthels (SK), DM3ML. EZNEC is an app for modeling and analyzing nearly any kind of antenna in its actual operating environment. Rotate the antenna display and zoom in for details. It has weathered six or seven Maine winters. Build Your Own RF Isolation/Matching Transformer - The simple DIY project for a broadband loop antenna with a Mini-Circuits transformer or by winding your own. A few standard EZNEC examples which fit within the 20 segment limit are also included. Hall The ARRL Antenna Book The American Radio Relay League Inc. In a first step all dimensions on the existing ZX 4 element 21 MHz antenna were measured and fed into EZNEC5+. One simply cannot model a phase-reversing coil using EZNEC's lumped inductance. Since 1939, it has maintained its place at the forefront of Amateur Radio technology a single resource covering antenna theory, design and construction, and practical treatments and projects. G4ZFQ'S VERSION OF THE COBWEBB Antenna. At January 2016 the ICT home server for employees is closed, the service will not be continued. A PDF file of the article as well as the EZNEC antenna files is available at the following links. couldn't put up more of an HF antenna without the neighbors noticing. Homebrew buddipole: https://docs. Unfortunately one of my antenna mentors and EZNEC experts is dead, so I'm a little slow at analyzing antennas these days. c) Far field and near field simulation results are presented in the Pattern window. LogPeriodic calculator Excel sheet to design Logperiodic Dipoles. I eagerly downloaded the EZNEC file and, because I have the + version of the software with a higher segment limit, changed all the wires to a consistent and even segmentation rather than keeping the tapering feature. 4nec2 files can also be imported into EZNEC and other antenna simulation programs. If you missed it, but are interested in the subject, the built in tutorial is quite good and can be done using the free EZNEC software from W7EL that can be loaded onto any laptop very quickly. Antenna Modeling Files Introduction In January, 1998, the ARRL Board of Directors changed the ARRL advertisement-acceptance 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. See the general description of EZNEC/ELNEC products under NEC-4 above. By using a modified L-network, the antenna appears as a regular 1/4 wave vertical on 40m, but has a shunt capacitor to match the very high impedance of an end fed 1/2 wave vertical on 20m. 820 MHz the antenna has a feed point impedance of 12. Since ~ 150 ohms is fairly close to my. Andrew Roos, ZS6AAA for a multiband antenna, since it can be easily matched by most wide range antenna tun-ers and will not cause an unacceptably high loss in the coax. If the losses are kept low, the RF will be radiated efficiently, even if the antenna is small. It is now out in a WINDOWS version, and is an extremely capable program for antenna modeling, or just looking at what an antenna should do. I specified a wire diameter of 4mm. These two antenna models are based on Cebik’s antenna collection available from his web site. 1 ft Example 3: January 2013 QST 1/5/2013. Also includes ATSC/NTSC Tuner Specs and Preamp Specs, plus a DTV Signal Overload Calculator and a Third Order Intermod Calculator. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. In this one book, you will find all of the information you need to design. I am basically looking for an omnidirectional 2 meter antenna with 6-8 dbi gain. No antenna pruning required. 4nec2 - NEC based antenna modeler and optimizer by Arie Voors. 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. A variation of the dipole antenna is the folded dipole as shown in figure 9. It was originally written in FORTRAN in the 1970s by Gerald Burke and Andrew Poggio of the Lawrence Livermore National Laboratory. The numbers are in inches. An STL does not have to be a compromise antenna. After a few designs have been simulated, it is usually appropriate to copy, rename, and modify an existing design rather than starting from scratch. EZNEC Pro will import or export files in. org aims to be the go-to resource for file type- and related software information. Save these EZNEC images for potential use in your Antenna Lab report by using COPY under the VIEW menu, and then paste these plots into a WORD document. The antenna pattern for the half-wave dipole is suggested in Figure 3. The location on my computer is C:>Users>John>AppData>Local>VirtualStore>Program Files (x86)>EZW. 15 MHz with an elevation angle of. 1 Alpha-Delta, multi-band, dipole antenna The antenna is an Alpha-Delta, model DX-EE . 1 MHz increments. Only download files, applications and plugins from trusted sources. Another vendor says to ADD 150 feet of RG-213 to your cable run. He did EZNEC plots of a Cobwebb and dipole at 10 metres high. EZNEC modeling shows that this technique will provide an omni directional pattern, but with some "warping" in the direction of the wire slope. There are two sets of measurements listed below. Low Band DX Antennas •On 80 and 160M, it gets much tougher, but the Inverted L is a very good antenna and can even be used on 160 –30M with a tuner •Its easy to use a 43’ vertical and use a couple wires to make it resonate on 80M •160M is the biggest challenge –on a small lot, its hardly ever “easy”. The file format is a list of gain values for an antenna at 1 ˚ intervals, but shown from a maximum gain of 0dB. Additional information can be found in the SimSmith Manual found in the. Welcome to the S-Meter Website. Antenna Modeling ON7PC - 03/02/0 3 Programmes de modélisation d'antennes EZNEC et YO - p 1/75 Introduction aux programmes de modélisation d'antennes EZNEC et Yagi Optimizer par Pierre Cornélis, ON7PC rue Ballings,88 1140 Bruxelles Plan. Readme – this is the installation and operation instruction document arrl antenna book 22nd edition comes with the Antenna Book software. Some minor changes to limits in antenna temperature figure of merit calculations. The J-Pole antenna is a common omni directional antenna used in amateur radio, particularly on the VHF and UHF bands. Download the G7FEK Antenna Construction Guide (PDF 600K) MMANA-GAL and EZNEC files EZNEC file optimised to also work in demo version of EZNEC. Want to make a change? EZNEC makes it simple. EZNEC Patch Antenna. The antenna will need a source. 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. The ARRL Antenna Book for Radio Communications, 23rd Softcover Edition has everything you need to design your own complete antenna system. com Free Download EZNEC 5. My EZ files converted by 4NEC2 Transformers (and EZNEC 5 imports) - 4nec2 forum. Click on the image to the left to see a screen shot from EZNEC v. It has weathered six or seven Maine winters. Only the very basics are exported to try and limit problems. You might leave a link to the cell phone booster antenna you are talking about. In comparison to the total number of users, most PCs are running the OS Windows 7 (SP1) as well as Windows 10. 45, using the NEC4D engine. Here you can download free eznec 5. This section is then followed by three coaxial traps. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. ez (Demi-CM4228). Short video demo of the EZNEC v5. I highly suggest familiarizing yourself with EZNEC for building and modelling antennas for both efficiency and directivity. All of the files are for antennas set for "mid band" tuning so that the VSWR is nearly equal at the band edges. The modeling EZNEC used Pro4 v. In other words, with a higher gain wire antenna, the area of minimal reception off the end of the wire is greater. antenna calculation software. (See results below). I modeled my S4 with this extension included, but I wanted to see if I could remove this part of the gamma and the antenna still work. On 40m, we are feeding it with 3/4 wavelength of ladder-line. This antenna WILL NOT show the true SWR in any antenna modelling package unless you are using one which uses the latest NEC4 calculation engine. Simple and Flexible QRP tuner. Portable 3-Band Yagi Article EZNEC zip file ADDITIONAL NOTES: Assembly. 45, using the NEC4D engine. The setup package generally installs about 17 files and is usually about 3. But the demo only allows you to create antenna models with a maximum of 20 wire segments, which is about enough to do a simple dipole. ez, can be downloaded by clicking on the link. Do not confuse your version of EZNEC with nec version. I got the 40 meter DBZ installed. Rotate the antenna display and zoom in for details. Long feed (simulating twin-lead?) was changed to simple Balun Source (BS) or simple Wire Source (WS) to fix VHF AvgGainTest. Example of using 4NEC2 to read the 20m Carolina Windom EZNEC format file from the ARRL 22nd Edition Antenna Book compilation of. Background High gain omni-directional antennas are more difficult to realize with horizontal polarization. Try the Saturday Night Simplex Net on 146. Download the EZNEC files: BROADSIDE ENDFIRE: The 'wires' dimensions for one vertical. htm; http://rudys. Moxon and 3el. Because I have no interest in encouraging more abuse, I will not provide said file to those who have made personal attacks. ez NEC file are SAME as HALF of cm4228a. NEC to the Rescue Numerical Electromagnetics Code – NEC-1 and NEC2 open source – NEC-4 big bucks and hard to use EzNEC Antenna Design SW (based on NEC2) – by W7EL, Roy Lewallen, eznec. Read about the program Noise. Details on how to construct this antenna, both as stand-alone and as a parabolic dish feed can be found at this link. To support the starting antenna modeler, in version 5. • Tuner at antenna is better than tuner at radio. Using an example model from the EZNEC files with 45degree radials elevated 5 wavelengths, the dipole was compared to the Slim Jim model. YU7EF 144 MHz LOW TEMPERATURE ANTENNAS. The main category is Basic antenna theory that is about Antenna theory, basics,design antenna. 80m Loop EZNEC Analysis. 85 dBi @ 30o Full wave delta loop for 15M 0. VE7BQH Antenna Data WA2WHV amateur radio, beam antenna and dipole calculator. Antenna Modeling EZNEC - Antenna modeling software by W7EL. This program implements all or nearly all of the input cards of the complete NEC-4 input deck, thus permitting the use of caternary wires, helices, networks, and other core possibilities. Modelling with round loops is almost impossible in NEC/EZNEC. Build one antenna, and you’ll quickly find yourself planning the next. A dipole has its feedpoint (where it connects to the radio) in the middle of the antenna, but an EFHWA’s feedpoint is at one end. My original plan for a four-band vertical is perhaps overly-ambitious, so I may scale back to designing some sort of short vertical for 20m that’s both sturdy enough and inconspicuous enough to leave erected in the back yard for more than a few hours at a time. 96 MHz and zipped coil505u. Next, click on the Wires tab to enter a set of wires as shown on the following page. 0 is a program developed by EZNEC. These two antenna models are based on Cebik's antenna collection available from his web site. Random Wire Antenna Lengths. EZNEC Antenna analysis NEC-2 based antenna analysis software for the amateur and professional. EZNEC uses nec2 by default. Conversion between the file types listed below is also possible with the help of EZnec. From time to time, this can be quite handy, especially if you find yourself starting to use several different modeling packages. Eznec file's show a little interaction between band's,but I work abt. Save these EZNEC images for potential use in your Antenna Lab report by using COPY under the VIEW menu, and then paste these plots into a WORD document. About file types supported by EZNEC. EZNEC Antenna Design Example. All books are in clear copy here, and all files are secure so don't worry about it. NEC file along with their basic meanings so that information re-entry in an alternative system is possible. The Hexbeam is a great little antenna! It should be high on your list of options if you want a design that can be "multi-banded", exhibits useful gain and directivity, is very lightweight, has a small turning radius, and which lends itself readily to "Do It Yourself" construction. 0 VSWR to 1:1 - the idea being that at 3. 2014, AD-HFdipoleRev1. Also the user @home. The NEC File Extension can be viewed on the Windows operating system. Most antenna modeling programs have extensive libraries of standard antenna designs to choose from, so #1 above is not so bad. The W8IO / WB0DGF Antenna Site EZNEC v. com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3M2ZmaG9tZXBhZ2V8Z3g6NGViNDIyYTE2YjA3YjNh. 06 Antenna Optimizer to find a configuration that minimized response to the rear. 5 The "Compact Quad" Multiband Antenna When I relocated to Johannesburg I needed a new multiband HF antenna. • Setup by modifying "BYDipole", or from scratch, in WIRES panel. K1POO 4 Band Off Centre Fed Dipole (40-20-15-10m ) MMANA-GAL K1POO Antenna model’s 3D far field results The antenna at 8m height above real ground 5mS/m and dielectric 13, SWR ref 200Ω. The Delta Loop antenna is one of the famous "magical antennas", but in reality, the Delta Loop antenna is not as magical as it's reputation. Cheers, Steve K7LXC TOWER TECH >> Dear antenna folks: 800+ Modeling Files for NEC & EZNEC A few years back, Modeling Expert, LB Cebik made available over 400 models from his personal collection of non-commercial antennas. 1 Alpha-Delta, multi-band, dipole antenna The antenna is an Alpha-Delta, model DX-EE . With it, you'll quickly learn what EZNEC can -- and can't -- do for you. This has turned out to be a pretty extensive analysis of this antenna. exe or EZWpro. Rotate the antenna display and zoom in for details. to select and open *. Conversion between the file types listed below is also possible with the help of EZnec. I’ve played around with EZNEC briefly before, but not enough to have really learned anything useful. The DF9CY SIX ELEMENT Antenna for 50 MHz This article describes my 6 element antenna for the 50 MHz Amateur Radio Band, which has some significant improvements over the 4 element antenna. Broadside azimuth plot. The location on my computer is C:>Users>John>AppData>Local>VirtualStore>Program Files (x86)>EZW. Fortunately, Leo (K4KIO) has done all the hard work for us and provided a spreadsheet which takes Hexbeam dimensions as inputs and which produces an output file that can be read directly into EZNEC. With it, you'll quickly learn what EZNEC can -- and can't -- do for you. Pneumatic Antenna Launching. If someone could model it on EZNEC and provide me with a link to the file I would appreciate it immensely. Antenna Models:. Thus the list shows the antenna gain as -ve dB's relative to the maximum antenna gain which produces an Antenna Pattern for RM and the actual antenna gain value is entered in the 'Radio Operating System ' allocated to the Unit on the. propagation at low latitudes, it came out that the best antenna for my future QTH near Quito, Ecuador should be two:. Bob is the host of the popular Ham Radio broadcast, Ham Nation as seen on Twit TV and has featured and demonstrated this phased array system on two separate episodes. The EZNEC+ v5. k5zdp, 4:1 is used to change the characteristics of the antenna to keep the signal off the shield. I bought a used AEA QT-1 antenna tuner off eBay for around $150 last year, but won't be able to try it until the loop antenna's up. EZNEC Model Files for 2D-40A. How they work. The ARRL Antenna Book for Radio Communications has everything you need to design your own complete antenna system. if you dont i. Software that open nec file - NEC antenna data Programs supporting the exension nec on the main platforms Windows, Mac, Linux or mobile. EZNEC uses nec2 by default. 9 MHz and 9. I thought I would do my own "KC0PET style" analysis. alphadeltacom. Antenna descriptions and pattern plots are easily saved and recalled for future analysis. That's not too bad at all. The following files and links point to NEC/AO/YO models of various Ham antennas that I have simulated and/or tested over the past 30 years as an antenna designer. Very complex models (such as some of the stacked VHF/UHF models in the VHF and UHF Antenna Systems chapter, for example) are also provided for completeness, but they must be. Portable and easy to deploy Portable homebrew antenna suitable for a “no tree” environment Based on Bill Drummond’s Buddistick Design Entire system run on Solar charged battery power Solar power supply can provide power to other devices as well. 12 MB (5,364,332 bytes). modified Antenna Notes files, have a 'd_' added to their names. I know how to use antenna analysis tools, and I often do, but I take them with a serious grain of salt. The AO file was created by VA3SK - Ken Smith kgsmith@onlink. See the pattern and antenna currents on the same color 3-D display as the antenna. Notice that the loss at 29 MHz is 2. • Feed line and balun can melt when running high power to a non-resonant antenna. Since it is a full wave antenna, you get twice the wire of a dipole into and onto the air. net Download Eznec file Azimuth plot. The Hy-Gain BA antenna boom length is 26 feet, not 24 feet. Antenna modeling with the low-cost or free programs available to amateurs has completely changed antenna design and development. 71 Feet Source=Feed Point 0. These two antenna models are based on Cebik’s antenna collection available from his web site. Software that open nec file - NEC antenna data Programs supporting the exension nec on the main platforms Windows, Mac, Linux or mobile. EZNEC Patch Antenna File Wanted. Inverted L vs. The NEC File Extension are listed predominantly as Data Files. I see a number advertised. b) The antenna geometry is shown in the Geometry window due to the Input NEC File. com reaches roughly 10,443 users per day and delivers about 313,302 users each month. This standing wave consists of both current and voltage that are 90 degrees out of phase. 0 pops up, it pops up with the antenna file LAST. Nittany Scientific produces a Windows version of NEC-4 called GNEC. There are two sets of measurements listed below. I have had good luck with half slopers for 80 in the past, so perhaps one cut down to fit a 14 meters tall tower can also do well. 80m Loop EZNEC Analysis. The free space model indicates a gain of 11. Making a Cobwebb. You will need a USB cable with a mini USB connector on one end and the Mini60 itself. I did not make any changes to the existing three element 2 meter transmitter hunting beam. Next step was to take the dimensions of an also existing 4 element (CB-radio 27 MHz) antenna and calculate its performance. I have had good luck with half slopers for 80 in the past, so perhaps one cut down to fit a 14 meters tall tower can also do well. * Note: Intel CPU is required on XP and Vista systems but not on Windows 7 and later. Conversion between the file types listed below is also possible with the help of EZnec. VLF Loop antenna. From time to time, this can be quite handy, especially if you find yourself starting to use several different modeling packages. My transmission line really does tune my antenna system. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. NEC based antenna modeler and optimizer. In the detailed files for a particular antenna, you can see the table with antenna element dimensions. ) frequency for many tens of miles. My loop will consist of a 508 ft loop of #12 insulated wire connected to the antenna tuner using 450 ohm ladder line. I changed the units to metrical, the ground type to my very poor, almost desert situation, and applied the AutoEz variables. The J-Pole antenna is a common omni directional antenna used in amateur radio, particularly on the VHF and UHF bands. There are two sets of measurements listed below. Once we get into arrays rather than single-element antennas the details matter. It plots the azimuth as well as elevation patterns and tells the users the feed point impedance, current distribution, current distribution, and SWR. At January 2016 the ICT home server for employees is closed, the service will not be continued. Example of using 4NEC2 to read the 20m Carolina Windom EZNEC format file from the ARRL 22nd Edition Antenna Book compilation of. A number of features are available on the left side of the screen, and exploration is encouraged. It writes EZNEC input files just dandy. I got the 40 meter DBZ installed. No antenna pruning required. The output of the EZNEC simulation is shown below, and it verifies that the modified antenna is still directional. See the general description of EZNEC/ELNEC products under NEC-4 above. Another model that you might simulate is the ubiquitous Coffee Can feed. com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3M2ZmaG9tZXBhZ2V8Z3g6NGViNDIyYTE2YjA3YjNh. 5 The "Compact Quad" Multiband Antenna When I relocated to Johannesburg I needed a new multiband HF antenna. net/ka1ddb/20meterhalfsquare. I've found, in my 35 years of experimenting, that some antennas work much better than predicted, and some work much worse (and that they're more likely to work worse than better HI HI ). In the left side of the ring we have the classic 1/4 wave monopole antenna with four drooping radials. It is a single W6NL Moxon located at a height of 60'. 1Several versions of EZNEC antenna modeling software are available from developer Roy Lewallen, W 7 EL, at www. Sounds like a treasure trove for you antenna modelers. Some minor changes to limits in antenna temperature figure of merit calculations. Rotate the antenna display and zoom in for details. Before constructing the antenna I ran the EZNEC files and found them to be reasonably accurate, except in one major area, which is the modelling of closely spaced. In reality that's of course not the case. 15 MHz with an elevation angle of. Want to make a change? EZNEC makes it simple. ez (Demi-CM4228). Read online How to Start Modeling Antennas using EZNEC book pdf free download link book now. b) The antenna geometry is shown in the Geometry window due to the Input NEC File. html; http://www. Antenna analysis software by Roy Lewallen. Since a large number of radio-amateurs has shown interest in my antennas after basic characteristics were published in VE7BQH G/T chart, and I am not able to answer numerous e-mail requests for data, I have decided to publish the complete data and make them available for all those willing to build and use my antennas. On this page, you can find the list of file extensions associated with the EZnec application. Hi-Z Antennas (tm) Receiving Antenna Comparison Chart. YAGio - Yagi Design by W8IO. EZNEC-ARRL v. Welcome to the S-Meter Website. d) And finally when sweeping you can see the impedance or the SWR or the F/B ratio versus frequency by. Recent versions of EZNEC contain a 3-D plot graphic that can be "sliced" for select 2-D patterns. Multiple patterns can be superimposed on a single graph for comparison. 12 MB (5,364,332 bytes). I tried making an EZNEC model of this antenna but the results are not reliable for two reasons: the antenna is an electrically small loop and it is electrically very close to the ground. The ARRL Antenna Book includes a CD that contains the book as fully searchable text along with the illustrations, as well as expanded supplemental content from expert contributors, software, PC board templates and other support files. The 4nec2 modeling program 1 contains a model of an 18-sided vertical magnetic loop with an 18-sided coupling loop in the sample file named "models\HFshort\Magnetic. This link is listed in our web site directory since Monday Dec 13 2010, and till today "EZNEC simulation files" has been followed for a total of 440. i found it so you do so. If you're up for it, you. In my climate, my antennas have to survive heavy snow/ice but also a lot of sun and wind. Rotate the antenna display and zoom in for details. Before retiring and moving to the Ozarks, zoning restrictions and power line proximity limited my antenna choices to wire antennas installed at relatively low heights. Welcome to the S-Meter Website. So to get a handle on what I’m looking at, I will start with a vertical half wave antenna driven at the center. How they work. Performance tapers off below about 5MHz, being about 6dB down at 3. The antenna will need a source. EZNEC, the preferred antenna modelling method, is referenced. pf3 files MMANA uses MININEC EZNEC and 4nec2 use NEC. EZNEC antenna simulation. 2 element, 3/8 wave spacing, 160M array layout. Short video demo of the EZNEC v5. ) frequency for many tens of miles. The resistive part (not shown) is essentially the DC resistance of the antenna wire, plus the ground resistance plus radiation resistance which increases with frequency. modified Antenna Notes files, have a 'd_' added to their names. The results are summarized in Table 5. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Interestingly enough â there is a switching and matching arrangement already up at the antenna, so my work might be a lot easier than I think. Because I have no interest in encouraging more abuse, I will not provide said file to those who have made personal attacks. I've not analyzed a trap antenna with EZNEC yet but there is a LOAD button in the program that brings up another menu and you can select RLC as the load. EZNEC is currently version 6 and a demo version can be downloaded from Roy Lewellen's website www. Conventional cross dipole antenna, which exhibits nulls for that antenna pattern, whereby the antenna may deviate from the reference or standard. We do not use outdated, amateurish programs like EZNEC Pro/4 - NEC4. A large set of antenna models designed for use with EZNEC 6. 0 Demo, except they come with dozens of ARRL designed antenna models. (See results below). Build one antenna, and you’ll quickly find yourself planning the next. Antenna Modeling Files Introduction In January, 1998, the ARRL Board of Directors changed the ARRL advertisement-acceptance 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. 2 element, 3/8 wave spacing, 160M array layout. The existing HF beam antenna installation just outside the radio room has not been included in the model. EZNEC models of the antenna were created for each band of interest (80 - 6 meters). Want to make a change? EZNEC makes it simple. transmission lines with EZNEC. EZNEC uses nec2 by default.