Quarter Wave Ground Plane Antenna Calculator
Frequency MHz
Velocity Factor (see text*) vf
Give me the results in… mm (MilliMetres)
cm (Centimetres)
m (Metres)
in (Inches)
ft (Feet)
A. Vertical Monopole Radiating Element (λ*0.25)*vf
B. Radials (λ*0.28)*vf
Actual wavelength