With the aid of an accurate 2 meter swr meter placed in the line between the transceiver and the antenna, the driven element lengths can now be trimmed or slid in or out of the boom or both, equally for the lowest swr at the desired frequency. Compared to a dipole the mentioned gain of 6 db will provide an equivalent from 400 watt on a dipole to 100 watt on the 3 elements yagi. A computer optimized vhf 2meterband yagi antenna for radioamateurs, transmitting and receiving on 144 mc to 148 mc with this beam in high gain dbs. Tearas webpage of software and links for yagi antenna design and fabrication. There are many reasons you should considering building your own antenna. Our builtin antivirus checked this download and rated it as 100% safe. Directional gain and front to back ratio november 8, 2016 dave michaels in this final article of our series on the legostyle antenna for teaching basic antenna physics and behavior, our focus is a yagiuda 3element antenna for 2 meters. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. Cm nec input file for twoelement, 2meter collapsible yagi cm pt control card suppresses printing of element currents cm tl control card specs transmission line in terms of z,length,and shunt y cm whip antenna specifications sections fully extended. Printing time for this project is quite extensive but you will not regret either the filament used or the time spent printing for one moment. Building a 4 element cubical quad iw5edi simone hamradio. Use a screwdriver and pliers to release one wire from beneath one of the rivets on the 58inch element.
The original design started with a 66foot long dipole for 40 meters. Collapsible 3element, 2meter yagi ae5ph radio notebook. Maple leaf communications antenna calculator 3element yagi. Vhf 69 element yagi antenna for 2meters for receive and transmitting.
The latest version of yagi designer can be downloaded for pcs running windows xpvista7810, 32. This page covers 3 element yagi antenna calculator. Oh, i got them to work but they didnt have that magic touch in a crowd, even when i stacked them. Also references arrls yw antenna modeling software, and use. The latest installation package that can be downloaded is 3. Cm nec input file for threeelement, 2meter collapsible yagi cm pt control card suppresses printing of element currents cm tl control card specs transmission line in terms of z,length,and shunt y cm whip antenna specifications sections fully extended. Read great article from ve3vn 40 meters 4element wire yagi. On a common build yagiuda antenna all the parasitic elements are in line. I have seen many antenna designs here but none met my needs. Dl6wu style yagis for vhfuhf updated 7 october 2019. Yagi antenna design basics learn more about a beam.
Vhf 69 element yagi antenna for 2meters for receive. About 3 elements yagi for 2 meter band the resource is currently listed in in a single category. A plumbers delight 3element 6meter yagi introduction this construction article provides guidelines to fabricate a 6meter 3element yagi. I think all monoband beams need the magic shortcoupled first director, so there has to be a minimum of 4elements. The main category is ham radio directional yagi antennas that is about yagi antennas for ham radio use, manufacturers, plans and design. This is where you input the center frequency in megahertz. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given. You may decide to go to the calculation section to let the computer do it all for you. Listed under the antennas2m category that is about antennas for 2 meters band. This link is listed in our web site directory since sunday sep 21 2014, and till today 3 elements yagi for 2 meter band has been followed for a total of 741 times. If you decide you really need a yagi with more elements, here are the lengths of them. Stay here to learn how to design a 3 element yagi for whatever frequency or wavelength you want.
Its efficiency is approximately the same as an ordinary half wave wire dipole antenna. As an swl, i was very much interested in antennas and its construction. The final length of the vertical element came out to be 2514 64. Its hot weather in texas in july and larry parker, n5wvx, shows us a novel way to make these cool elements for a 2 meter yagi and also his method of building a gamma match. The 3 element design described here will actually cover the entire 6 meter band a bandwidth of about 7. It doesnt matter if the gammacapacitor tube is slightly in front of or behind the driven element, but it should be parallel to it. The 3 69 40 meter wire yagi is a simple 3 element yagi made with ordinary antenna wire. Im told this antenna has a stub match, but thats not a matching system im familiar with. Owa 4 element yagi for 2 meter great fb ratio please. This link is listed in our web site directory since tuesday oct 2009, and till today 3 element portable yagi for 2 meters has been followed for a total of 5819 times. The calculator creates equal spacing between the elements, which achieves a balance between good bandwidth performance and a decent 50ohm match.
The 369 40 meter wire yagi is a simple 3element yagi made with ordinary antenna wire. You can create an icon on your desktop to run yagicad by right clicking and dragging the exe to the desktop and selecting create shortcut here. Ive been using it for five years at field day and its hotter than a fire cracker. Ham radio 2 meter antenna made with an old coffee can. For the highest gain or discriminating against an interfering signal 20deg40 deg azimuth off the desired signal, we use a yagi antenna. When you improve your system you will notice a big difference between a 2 or 3 elements yagi. First you can taylor it to the needs of your communication local or dx and optimize it for the frequency you talk on and to the needs of your environment make it strong if you live in a harsh one where ice and wind is a problem. The 369 wire yagi an alternative yagi tuning scheme. You also want the best gain possiblebest bang for buck arrl. Yagi calculator is a windows program that also runs well on linux. The following text contains some basic yagi design concepts aimed toward. A 12 inch 10 foot pvc pipe 3 14 inch x 36 inch aluminum rods 2 14 inch x 48 inch steel rods i know theyll rust, its just temporary to get it to work, ill get aluminum later i dont have any coaxial cable dont know the best type to get and dont know how to match the impedance of the cable to the antenna. I elementsthe yagi antennas basic design is a resonant fed dipole the fed dipole. Vhf 69 element yagi antenna for 2 meters for receive and transmitting.
I have not measured the boom length or the element lengths. Aug 27, 2014 6meter, 3element beam ready for painting and mounting. This antenna has great fronttoback ratio and is optimized for wide range of frequency, a bargain for its compact design about 76 centimeter long. A well designed yagi antenna as per the design given below can cover a line of site distance of even 5 kms with just 1 watt rf power. The main category is antennas for vhf uhf bands that is about antennas for vhf and uhf radio bands. May 19, 2015 keep the coax away from the driven element while tuning. Sep 11, 2017 3d print 3 element 2m 145 mhz ultra portable yagi by. 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. A computer optimized vhf 2 meterband yagi antenna for radioamateurs, transmitting and receiving on 144 mc to 148 mc with this beam in high gain dbs. Keep the coax away from the driven element while tuning. It has a gamma match but i might have to work withrepair that. A piece of rg8 coax and a length of tubing combine to create an inexpensive and rugged gammamatch capacitor.
A two element yagi is somewhat better than a dipole as it has 3 db greater directivity 5. Yagi uda design dimensions can vary significantly with differences in element diameter, boom material, element toboom attachment method, and other factors that are ignored by this simple calculator. The n5wvx 2 meter 7 element yagi with a twist cool elements based on the 2 meter beam project by larry morgan, ag5z. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. The following is an example of a 3 element yagi used in the 2 meter band. Wc7i provides a calculator for a 3 element yagi design.
For pcs with operating systems prior to windows xp the file you are looking for is dot net framework 2. A plumbers delight 3element 6meter yagi introduction igure 1. Cm nec input file for two element, 2 meter collapsible yagi cm pt control card suppresses printing of element currents cm tl control card specs transmission line in terms of z,length,and shunt y cm whip antenna specifications sections fully extended. Enter the desired frequency then click on calculate and the optimum values for that combination will be displayed in feet, inches and fractions of inches, and in meters. Figure 2 10 meter 2829 mhz freespace gain curves for the three wideband yagis. It features extremely high forward gain, a clean radiation pattern and an excellent fronttoback ratio. The design is very similar to 3 elements yagi for 145mhz for the boom and elements spacing. When i got my ticket, i searched around for a design of a 2 meter antenna. I recently acquired a decibel 3 element vhf yagi that was formerly in commercial service. Gefallt mir antwort als spam markieren 2 vor 6 jahren6 j. Yagi antenna directional gain and front to back ratio.
Describe your experience with the gulf alpha 2 meter 7 element long boom cross polarized yagi and tell us why you give it the rating you did required. The design criteria you have posted is very similar to what i have developed using yw. Build a 4 element 2 meter yagi, using a stellar labs 302460 outdoor fm. This calculator is designed to give the critical information of a particular beam antenna, in this case a three element yagi, for the frequency chosen. Having recently acquired an icom ic7200, im looking forward to getting involved in 6meter sideband again, particularly the lagrange amateur radio clubs buzzard net. The frequency of operation determines the driven element length and the spacing of the elements. Some are based on lookup tables, some completely hide their algorithms. Enter the desired frequency then click on calculate and the optimum values for that combination will be displayed in feet, inches and fractions of.
Blue plot is the phased design, black the three element re. The dimensions shown in figure 2 produce a radiation pattern with low sidelobes and. The formula and basics of yagi antenna calculator are also explained with example. Still not much gain directivity and not much in the way of front to back ratio. I have to say that i have never had any real success with a 3element yagis design. Is there a good source of information on gamma match specs for a 10 meter 3 element beam. For the 2 m band we face a factor of round about 3 mm 1 mhz for a 14. Yagiuda design dimensions can vary significantly with differences in element diameter, boom material, elementtoboom attachment method, and other factors that are ignored by this simple calculator. It is quite possible, that other calculators deliver slightly different results.
The end project is a professional looking antenna that looks and works well. Antennasyagi yagi antennas for ham radio use, manufacturers, plans and design. Figure 4side view of the drivenelement area and so239 mounting bracket. Theoritically the antenna has about 10dbi gain in its main lobe and a good fronttoback ratio, a perfect substitute if you dont have means to get the popular v24 silverthunder antenna. Long yagis are commonly used from the 144mhz amateur band to the 2. Typically the reflector is 5% longer and the director 5% shorter than the driven element. Windows download and execute the package file wsjtx2. Easyjust cut the 6 lengths into four pieces 18 pieces use a 2 overlap for the 12 piece too. Pdf vhfuhf radars use yagiuda antenna in an array configuration for. A short boom, wideband, three element yagi for 10 meters. I connected my mfj259b antenna analyzer to the antenna and found its minimum swr at 155 mhz. Linux wolf pack linux resources help software articles and woodworking kit. Listening to satellites with a homemade yagi antenna ham radio operator, code.