Plane Antenna Calculator
This calculator is designed to
give the vertical length of a quarter-wave
ground plane antenna, and the length of each of the four radials for
the selected frequency you have entered. The normal quarter wave ground
plane antenna consists of an insulated vertical radiator and surrounded
by four horizontal radials To find the lengths of the vertical
radiator, and the length of the four horizontal radials, enter the
desired frequency of operation. Click on Calculate and
the lengths will be displayed in meters, feet, and inches.
Once you have finished your ground-plane, some pruning of the elements
may be required to fine-tune the VSWR component This
VSWR optimization will make the antenna perform more efficiently. To
use 1/8 wave-length radials, divide the radial length results by
2. Do not reduce the length of
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