Calculator - 3-Element Yagi
Use At Your Own Risk
Maple Leaf Communications assumes no responsibility for material calculation errors or other deficiencies in the calculator offered here.
Installed antennas can be affected by buildings, trees, mast properties, other antennas, ground conditions, and more.
Dimensions reported by this calculator should be considered only approximations of the length(s) of material required.
When ordering materials and building your antenna, allow a little extra length and trim as necessary instead of building and installing the antenna before discovering that it is too short.
For people who can get them high enough, and have a method for rotating them, Yagi-Uda antennas are among the best choices for DX work. Their directional selectivity and high gain mean quieter received signals, and stronger transmitted signals, than many other antenna options.
PLEASE NOTE: the warnings above are especially true for this calculator. Yagi-Uda design dimensions can vary significantly with differences in element diameter, boom material, element-to-boom attachment method, and other factors that are ignored by this simple calculator.
The calculator creates equal spacing between the elements, which achieves a balance between good bandwidth performance and a decent 50-Ohm match. Experimenters might want to try varying the spacing (especially between driven element and director) and adding a matching system to achieve different results.