It produces maximum gain but requires tweaking for the number of elements. The end project is a professional looking antenna that looks and works well. Yagi calculator is a free antenna design and analysis software for windows. Yagis ohne weitere anderungen elemen te hinzuzufugen oder wegzulassen. The mast has a height of 8m and can be erected easily without any helpers. The spacing are the same between the elements and when built successfully it will. Yagi calculator download it performs the calculations needed to. The cubical quad antenna calculator for citizens band cb radio and amateur radio communications to calculate the spacing between the reflector and driven elements and directors. A 400wacgenerator or 2x100ah lead acid batteries gives the power for several hours of. A closer look at the connection box and attached aircell7 coax. This is a very low number for a 4 yagi system on 70 cm. An application designed to generate data for the construction of long yagi antennas for vhf and uhf use.
To assist software writers i have created a dll that will work with delphi and c compilers under windows and linux to do all the moon calculations for amateurs. To be combined with a yagi uda antenna or used as is. Antenna calculator calculate your dipole, 3 element yagi etc find the length of a dipole. Low profile 6 meter cubical quad nc4fb amateur radio.
I have seen many antenna designs here but none met my needs. Dont forget the driven element red is cut in the centre. Build your own three element yagi the calculations for these antennas are from n3dnos antenna calculator. Yagi with 5 elements on 2 m, 8 elements on 70cm and one feedpoint. Due to material, i decided on a 5 element yagi built for vhf since all i would have to buy is more 38. It is not hoisted yet, still to do, design and complete the. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given frequency range and length. A simple 4 element 2 meter yagi made from coathangers or other common materials by pete rimmel n8pr.
The below image is the measurements of the antenna. Simple wideband yagis for 2m and 70cm errata and extra pictures. Use our simple calculator to determine approximate dimensions of materials needed to build a 3element yagiuda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications. This is the four line lcd version, currently using internal calculations to track the moon. It appears that the swr on 70cm is very dependent on the length of. I figured the gain, frontback isolation, impedance, and other stuff that takes a rocket scientist to figure out, or at least someone smarter than me, hihi with yagimax 2. Tommy gober built this yagiuda antenna that has some handy design features. The yagiuda antenna is the most recognized antenna. Since my article on simple wideband yagis appeared in september ar i have had a number of people contact me advising that it would be better to use the grey electrical conduit rather than the orange version i did.
This program uses different formulae for 2, 3 or multielement designs and includes element tapering verticals covers all the common types with a coil calculator built in for the antennas that require them. The following text contains some basic yagi design concepts aimed toward. Model elements boom length ft mhz range gain dbi mount position polariz. If you want to put this thing outdoors, do not use brass, as it.
This program calculates the focal length and x, y coordinates for a parabola of any diameter and depth. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a. No physical connection between the 2m and 70cm elements. Yagi calculator is a windows program that also runs well on linux. In this menu, you need to submit values of multiple. 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. Download yagi calculator this is an application designed to generate data for the construction of long yagi antennas for vhf and uhf use in a. If you decide you really need a yagi with more elements, here are the lengths of them. Ive taken what i learned from the gmrs continue reading homebrew 5 element vhf yagi.
Typical tubing diameters for the 2m and 70cm bands are from 0. The yagi is optimized for the cwssbparts of the bands, but usuable for the full bands. To scale this antenna for any other vhfuhf frequency, read the arrl article. The boom is a piece of conduit with holes drilled in the appropriate. This page shows a 7 element, yagi beam antenna built out of spare parts for the 70 cm band. Dl6wu style yagis for vhfuhf updated 7 october 2019. This page covers 3 element yagi antenna calculator. Yagi calculator will help any radio enthusiast to design and build hisher own dl6wu yagis for vhfuhf, meeting the criteria developed from. If you take the vk3um eme calculator and take a 4 yagi group with a gain of 20 dbd and a preamp of 0. Now its time to step it up just a little bit and fabricate a bigger antenna.
This is an excel spreadsheet template to design dl6wu yagi antennas based. It contains formulas you can use to calculate element lengths and spacing, as well as boom length. Some are based on lookup tables, some completely hide their algorithms. They can be made using various materials and in varous sizes. It is quite possible, that other calculators deliver slightly different results. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Yagi uda antenna calculator you may want to combine it with a folded dipole. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr to design the antenna, you need to go to task design yagi menu. Yagi calculator is a program build to produces dimensions for a dl6wu style long yagi antenna. Yagi calculator this is where you input the center frequency in megahertz. Figure 2 shows a screen shot of an example 70cm dl6wu yagi design in inch. The antenna is bearing 25 degrees north north east and will be used. Cheap yagi for 70 cm build this cheap and easy satellite downlink antenna by richard f. Camden county amateur radio society georgia ccars inc.
The dl6wu yagi is highly regarded as being easy to build with repeatable results. Long yagi are commonly used from the 144mhz amateur band to the 2. To build the 4 elements yagi you may follow the direction for building the 3 elements yagi except that you will add an additional parasitic element director which is about 5% shorter than the last element of the 3 elements yagi. Simple wideband yagis for 2m and 70cm errata and extra. Cheap yagi for 70 cm build this cheap and easy satellite. A simple 4 element 2 meter yagi made from coathangers or. A computer optimized uhf 70 cm yagi antenna for radioamateurs, transmitting and receiving on 420 mc 430 mc 440 mhz to 450 mc with this beam in high gain. Although the gamma match is originally for 3 elements yagi antenna uhf this will also work with this 4 elements uhf yagi antenna. The boom, plastic inserts are all from a broken tv antenna. The gain of an an antenna with parasitic elements varies with the spacing and tuning of the elements, and thus for any given spacing there is a. For the complete 2mdata see the 5elementultralightyagi.
Yagi calculator is a windows program that also runs well on linux, ubuntu 8. The recent addition of an elecraft xv222 transverter and homebrew yagi completes my coverage up to 70cm. Using this software, you can design and build your own yagi antenna. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. Printed or written template with antenna dimensions. Virtually no ham antenna article today lists all the materials, tools and speci. I started this project after building my first mono band moxon for 15 mtr band. Also, it makes an excellent school, club or boy scout project. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. Calculator 3element yagi maple leaf communications. Antenna, ve3sqb ham radio antenna design software programs. One wooden square, 1 cm per side, 50 cm long 70 cm for the 20 element antenna.
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