Yagicad is a fully integrated analysis and design package primarily intended for vhf yagi aerials. Simply enter the freqency in megahertz and the script will do the rest. How to design a threeelement yagiuda antenna for operation at. Exemplary measured smith chart taken with hp8753es at antenna connector. I do realize that this is not an optimum design, but it did help me to put out a very good signal on 2 meters.
We can also provide you with custom settings to suit your operating preference such as peaking your gain and fb in the cw portion or the phone portion of the band. About 2 element yagis for hf the resource is currently listed in in 5 categories. Building a multiband yagi posted on february 9, 2014 by lee when you are a new ham it doesnt take very long until you realize that dxing on the higher bands is a tough ask if you only have minimal wire antennas. Long yagi are commonly used from the 144mhz amateur band to the 2. For stacking the yagis must have other lengths for the elements. This page covers 3 element yagi antenna calculator. The yagiuda antenna is the most recognized antenna. Some are based on lookup tables, some completely hide their algorithms. Working with my antennamodeling program, it became clear that there was serious interaction between the elements. An excel workbook to aid in the design of a feed system for a typical two element phased array.
Building a multiband yagi lee jennings amateur radio zl2al. The two elements yagi uda is the smallest one among the yagi uda familly. Years ago, i used it to build a 5 element yagi on a 5 boom that was direct 50. The impedance is influenced by the stacking, therefore new lengths are to be calculated. Yagi calculator is a program build to produces dimensions for a dl6wu style long yagi antenna. Antenna stacking distance calculator k6vhf antenna stacking calculator for long yagi s, all you need to know is the 3db beamwidth for stacking similar antenna. 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. For these types of antennas ultrabeam has designed an adequate and very reliable element support mechanics. It is quite possible, that other calculators deliver slightly different results. Read the information on the program screen on how to use it. Elements used by yagis antennas operating in the 750 mhz range are about 21,5 meters long. This is a standard 6 elements design scaled for uhf application.
I have seen many antenna designs here but none met my needs. The separation will remain the same for all the elements and the lengths of these extra directors will all be the same as the 1st director. The following text contains some basic yagi design concepts aimed toward. This calculator is designed to give the critical information of a particular beam. I used homemade low height dipoles for the low bands and a two elements 3 bands wire yagi antenna designed by ve7ca reference 1. This is the part of the antenna to which all the other elements are fastened. Boom material is wood 18 mm square western red cedar, very stable material. The idea is to get an small antenna, this is a great solution. Calculator 3element yagi maple leaf communications.
If you dont have a lot of experience using antenna modeling software. So i can compared the performance between 3 element and 2 element yagi. Home gallery projects software downloads contact me links. If you decide you really need a yagi with more elements, here are the lengths of them.
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. I was surprised how this antenna performed well and i succeed to score 39. This is a fairly big 2m yagi with elements on a six metre boom. I am trying to find plans for a two meter yagi antenna with the following specs and i have not found anything. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. With yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs. I found an old program i had that runs on dos that lets you create a yagi by changing any of the lengths, spacings, or tube diameters.
The main requirements for the design of 3 element yagi antenna are the following. This link is listed in our web site directory since friday aug 25 2006, and till today 2 element yagis for hf has been followed for a total of 48414 times. Below is a javascript that i wrote in order for you to quickly calculate the dimensions for a seven element yagi uda antenna. Yagi calculator this is where you input the center frequency in megahertz. A simple 4 element 2 meter yagi made from coathangers or. 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. These antennas were made with this process, and tested on this backyard antenna range.
My 2 elements 15m and 20m monoband yagi i have 3 element monoband yagi for 10m and 20m. Yagi calculator is a free antenna design and analysis software for windows. Ultrabeam yagi 2 elements 620 metres ham radio antennas. The yagi uda antenna consists of a number of parallel thin rod elements in a line, usually halfwave long, typically supported on a perpendicular crossbar or boom along their centers. Verticals covers all the common types with a coil calculator built in for the antennas that require them. Log periodic antenna design calculates the dimensions and spacings of the elements needed to build a log periodic antenna, given tao. This method of construction can be used on most uhf through low microwave yagis, and is especially useful for the 33, 23 and cm bands. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. 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. The jk402 is a short boom 2 element 40m yagi that has excellent gain and fr. Element dimension in inch unless otherwise specified.
This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr. Coaxial cable calculator dielectric coaxial resonator heatsink calculator. Stay here to learn how to design a 3 element yagi for whatever frequency or wavelength you want. Highest rank cross plus yagi antenna for vhf contests, or eme work. I like to use the basic dl6wu wideband yagi designs whenever possible. The formula and basics of yagi antenna calculator are also explained with example. All you need is two rabbit ear antennas from radio shack, two catv baluns, four feet of 34. Some manufacturers might claim they have a special feed system or have some other fancy way of putting things. Excellent choice for any competitions on 144 mhz to 145 mhz. This calculator is designed to give the critical information of a particular beam antenna, in this case a seven element yagi, for the frequency chosen. The most common is to take a length of rigid tubing, cut to the desired boomlength, and mount the elements with ubolts, pipe clamps, muffler clamps or whathaveyou. Long yagis are commonly used from the 144mhz amateur band to the 2. Here we can see two waves of the same wavelength the red and the blue.
This design can then be optimised or scaled to suit particular requirements. The software we have used did not permit two antennas to be plotted. Remote control for aim and vnwa two workbooks that provide a remote control link between zplots and the w5big aim device or the dg8saq vnwa device, respectively. They can be made using various materials and in varous sizes. Boom construction aluminum 8 feet in length or less driven element folded dipole feed point. It produces maximum gain but requires tweaking for the number of elements. The calculator creates equal spacing between the elements, which achieves a balance between good bandwidth performance and a decent 50ohm match. A portable 2element vhf yagi iw5edi simone hamradio. I could not obtain a workable feedpoint impedance on.
Amateur vertical antenna calculator this basic calculator is designed to give the aproximate length height of a particular vertical antenna, for the frequency and wavelength chosen. Using this software, you can design and build your own yagi antenna. Designing 28 mhz 2 elements horizontal yagi using mmanagal free software. The main category is 20 meter yagi antenna plans that is about plans for a 20 meter yagi antenna. I elementsthe yagi antennas basic design is a resonant fed dipole the fed dipole. That is a pattern which has low side lobes in relation to the main lobe.
The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. The end project is a professional looking antenna that looks and works well. Not easy to put high up my tower, because its heavy. Ultimate design with with latest professional full3d electromagnetic modelling software. Designing 28 mhz 2 elements horizontal yagi using mmanagal. A reappearance of the antenna of the computer design. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8. Free online engineering calculator to find the dimensions of a yagi uda antenna for a.
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