Yagi antenna design optimize amateur radio
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CAD manufactured high performance antennas - Made in Germany -: Multiple-optimized design according to DL6WU All holes of the boom drilled automatically by robot - extreme small tolerances Elements automatically cut, length tolerance less than max. This is in particular important for high-gain yagis: even the highest gain gets useless if unwanted signals or interferences are being received from the back side of the antenna. EME or SAT freaks enjoy our antennas due to the low backward noise scatter from the surface of the earth. All nuts, bolts and washers are manufactured of stainless steel. For those antennas with support strut also the mast clamp itself is made of stainless steel where else do you find this?
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The Optimum 6 Element Yagi-Antenna
VHF/UHF Long Yagi Workshop
AP 23, , page 8 ff. Chen and D. Cheng described a method of designing optimized Yagi antennas using computer calculations. The article also included a numerical example for an optimum 6 element Yagi antenna. In this case, optimum means the highest possible gain, independent of boom length and bandwidth. This article is now to give the data for constructing a 70 cm and 2 m version of this antenna, however, it is not meant to be a fool-proof method of constructing antennas, but is to describe a method of constructing an antenna that really works. The results were usually unsatisfactory.
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Yagi Antenna Design
In addition to the directivity goal an impedance match condition is also included as a constraint. Any constraint violations will penalize the objective. We use this function with options specified with the optimoptions function. At every iteration, plot the best value of the objective function and limit the total number of iterations to Pass the objective function to the surrogate function by using an anonymous function together with the bounds and the options structure.
One area that is still open to amateurs is in antenna building. For a hundred years the amateurs have made more breakthroughs in antenna design than the professionals. We do not know all the rules so we go ahead and build the antennas anyways, Some work, some don't. You may be that designer.
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