3/25/2021 0 Comments How To Build Yagi Antenna
Another ham brought to my attention, that I should have indicated if this yagi antenna calculator is built with the Yagi beam elements isolated from the boom or not isolated.It is configured so that all of the Yagi beam Elements should be isolated from the boom.
This calculator is for short boom simple multi element monoband yagi antennas, and will not give you a perfect 50 ohm match. For advanced design look at the picture on the page for Eznec Software to get an idea of the shape you should be looking for. There are lots of yagi design programs on the web, but most of them do not tell you what particular. ![]() ![]() EZNEC claims this antenna has around 11.9 dBi gain, but that seems far too high to me. The theory works for ANY frequency you choose, from below 160 meters to way above 440 MHz. The 80 meter version was used for Field Day 2006 in Olympia, WA by the. This is a fantastic antenna, but that just seems like far too much to believe. I suspect that 8 dBi is probably more correct, but even 8 dBi will mean that 100. A couple of charts from EZNEC will help show what the calculations claim for this antenna. This Azmuth Plot graph shows the gain, and also says that the beam width is 138. To keep things very simple, I will ignore most of the things that a Ph.D in. Both of these distances will be 0.2 wavelengths long. The director will be 5 shorter than the driven element, and the reflector. You will need to know 6 things, and you already know many of them. Note: The driven element will need to be cut in half and connected to the feed line. The frequency of operation determines the driven element length. Length 468Frequency ( in MHZ) 468147.360 3.176 Feet. Build Yagi Antenna Full Length OfThe full length of the driven element is 3 Feet plus 2 inches. Each side will be half that length, or 3.176 Feet2 1.588 Feet. Convert 0.588 feet to inches. Each half of the driven element is 1 Foot plus 7 inches long. The length of the refelector is 5 longer than the driven element. The director is 5 shorter (95 as long) than the driven element. That is the completed design for the element lengths and spacing. Please go to the calculation section for the actual calculation. This program will give you the results so you do not have to do them yourself. You will soon find the limitations and want to up-grade to the better version that.
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