Amateur Dipole HVL Antenna Calculator
This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to give the horizontal and vertical total length of a particular dipole (horizontal vertical Vees, more popularly known as an L) antenna, or one side of it, for the frequency chosen. Enter the desired frequency and select the desired calculation from the drop box. Click on Calculate and the optimum length for that combination will be displayed in feet, inches and fractions of inches, and in meters. The general shape of the antenna is that of an L, the horizontal element 90 degrees to the vertical element. Lengths are given in feet, inches and fractions of inches, and in meters. To optimize the antenna for a frequency RANGE, do the calculations twice, once for the low end of the range and once for the high end; then average the two and plan to adjust the VSWR on both ends of the range as needed. Two of these can be co-phased to make a two element dipole HVL beam. Four of them can be quad-phased with both sets of verticals up and each set of horizontals in the opposite parallel direction. If co-phasing or quad-phasing, 75 ohm coax (RG-59) should be used for the antennas (antennae, if you prefer) instead of 52 ohm coax (RG-58).
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