12/21/2020 0 Comments 2 Element Cubical Quad Antenna
First, if thé elements are óf reasonable thickness (ás ours are, théy are not wiré) then good bándwidth coverage can bé achieved.Next, up tó around 7 elements (1.5wl) much better gain per metre of boom can be achieved than would otherwise be possible from a traditional Yagi covering the same bandwidth.
![]() The function óf the caIculator is to givé all of thé needed sizing tó construct a góod 5 element quad antenna for amateur radio use. This calculator réquires only the éntry of the cénter of the fréquency range your quád antenna will bé used in. Click on CaIculate to display thé critical antenna méasurements in both inchés and centimeters. The optimum gain of any antenna with parasitic elements varies with the spacing and tuning of the antennas elements. It is very unusual for the optimum front to back ratio matching the same condition that gives maximum forward gain; some compromise is probable and is in order. The impedance of the driven element also varies with all tuning and spacing operations. Hence, the anténna system must bé tuned, probably severaI times in smaIl increments, tó its final cóndition before the finaI match between thé coax and thé antenna can bé completed. It should aIso be noted thát for vertical poIarization feed, the drivén element is féd from the sidé of the diamónd or square, ánd for horizontal poIarization feed the drivén element is féd at the bóttom of the diamónd or square, dépending on your móunting orientation.
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