Frequency and wavelength are inversely related through the speed of light: c = f × λ Where: c = speed of light (300,000,000 m/s) f = frequency in Hz λ (lambda) = wavelength in meters So: λ = c / f At 1 GHz, wavelength = 30 cm At 3.5 GHz, wavelength = 8.6 cm At 28 GHz, wavelength = 1.07 cm