Gain of Antennas Calculation

The calculator will calculate the Antenna Gain for given values of efficiency, wave length, physical aperture area. The relative increase in radiation at the maximum point expressed as a value in dB above a standard is called antenna gain.
Formula: GdBi = 10 LOG10(η 4 πA / λ2)
Where,     η = Efficiency,     λ = Wave Length,     A = Physical Aperture Area
Efficiency (η) =
Wave Length (λ) =
Physical Aperture Area (A) =
Antenna Gain(GdBi) =