Question

The equivalent area when multiplied by the instant power density which leads to free radiation of power at antenna is called as _______

(a) Loss area

(b) Scattering area

(c) Captured area

(d) Effective area

This question was posed to me in an online interview.

My question comes from Basics topic in division Antenna Parameters of Antennas

Answer 1

Right option is (b) Scattering area

The explanation is: Scattering area is the equivalent area when multiplied by the instant power density which leads to free radiation of power. Loss area leads to power dissipation and captured area leads to total power collection by the antenna. The relation among them is given by,

Captured area= effective area + loss area + scattering area.