Question

Free space loss factor is given by _____

(a) \(\frac{\lambda}{4\pi R}\)

(b) \((\frac{\lambda}{4\pi R})^2\)

(c) \(\frac{4\pi R}{\lambda}\)

(d) \((\frac{4\pi R}{\lambda})^2\)

This question was addressed to me in examination.

This interesting question is from Friis Transmission Equation in portion Antenna Parameters of Antennas

Answer 1

The correct choice is (b) \((\frac{\lambda}{4\pi R})^2\)

Easy explanation: The free space loss factor is given by \((\frac{\lambda}{4\pi R})^2\). It is used to know the amount of losses occurred due to the spreading of energy by an antenna.