Question

The relation between directivity and the effective aperture of the uniform aperture antenna is given by _____

(a) \(D = \frac{4\pi}{\lambda^2}A_{eff}\)

(b) \(A_{eff} = \frac{4\pi}{\lambda^2}D\)

(c) \(A_{eff} = \frac{4\pi\lambda^2}{D}\)

(d) \(D = \frac{4\pi\lambda^2}{A_{eff}}\)

This question was addressed to me in class test.

My question is from Radiation from Rectangular Aperture in division Aperture Antenna of Antennas

Answer 1

Correct answer is (a) \(D = \frac{4\pi}{\lambda^2}A_{eff}\)

The explanation: For a uniform aperture antenna, the physical and effective apertures are equal.

The relation between directivity and the effective aperture of the antenna is given by

\(D = \frac{4\pi}{\lambda^2}A_{eff}\).