of Dipole
Speed of light
Ohms Km/s
Impedance of Folded Dipole
d1 d2 S
Impedance in Ohms

To calculate the element length L the next calculator is based on the formula Wavelength = Speed of Light / Frequency. But because electricity travels slower through copper than space, I have reduced the velocity factor Vf by about 0.951before converting it into a 1/2 wavelength.

Length of Element (L)

Frequency Velocity Factor
1/2 Wave Length in MM
Mhz Vf