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Uhf- dx antenna
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<blockquote data-quote="Channel Hopper" data-source="post: 739812" data-attributes="member: 175144"><p>A phased array requires all antennas to have the nodes supplied to the main download simultaneously.</p><p></p><p>Easy enough with VHF, but with high UHF band the wavelength is under 35cms. </p><p>To ensure the maximum signal all antennas should be fitted exactly perpendicular to the grid, parallel to each other, and all collectors on the same plane.</p><p>All cables from each collector should run to exactly the same length to the combiner, and if there is more than one combiner (say five lots of four) then each cable between them should also be the same length, to within 0.5cms.</p><p></p><p>Don't forget, gain is only one part of phasing, beamwidth is also narrowed on yagis, and the directionability/stability of the stack becomes almost as important, very much like a large dish.</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 739812, member: 175144"] A phased array requires all antennas to have the nodes supplied to the main download simultaneously. Easy enough with VHF, but with high UHF band the wavelength is under 35cms. To ensure the maximum signal all antennas should be fitted exactly perpendicular to the grid, parallel to each other, and all collectors on the same plane. All cables from each collector should run to exactly the same length to the combiner, and if there is more than one combiner (say five lots of four) then each cable between them should also be the same length, to within 0.5cms. Don't forget, gain is only one part of phasing, beamwidth is also narrowed on yagis, and the directionability/stability of the stack becomes almost as important, very much like a large dish. [/QUOTE]
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