VHF Antenna Length Calculator

The VHF (Very High Frequency) range is 30 MHz to 300 MHz. Use this calculator to find the dimensions of a Dipole antenna designed to operate at this frequency range.

A half-wave dipole antenna is comprised of two quarter-wavelength conductors placed end to end [1].

This calculator gives the length of a half wave dipole antenna. Enter the Frequency and the tool will compute the antenna length (L).

Example Calculation

At a frequency of operation 200 MHz. The dipole length (L) is 28.1 inches or 0.71 meters.

Formula

The total length (L) of the dipole antenna is calculated as:

L = 468 / f

where f is the frequency in MHz.

f is calculated from the wavelength.

The length of each arm of the dipole

l = L/2