Antenna Gain Calculator
Antenna Gain
Calculate antenna gain in dBi from efficiency and aperture.
Formula
Gain (dBi) = 10 log10(efficiency x 4 pi A / wavelength^2)
Frequently Asked Questions
What is antenna gain in dBi?
Gain in dBi is the directional power relative to an isotropic radiator.
Does a larger dish mean more gain?
Yes. Doubling the diameter roughly adds 6 dB of gain.