(Q). A parabolic antenna having a circular mouth is to have a gain of 1000 at the wavelength of 10 cm. Estimate the diameter of the mouth and the half-power beamwidth of the antenna.
by 0 λ = 10 cm = 0.1m Gp = 1000 Gp = 6 (D/ λ)^2 D/ λ = √( Gp /6) D = √ (1000/6)*0.1 D …