Question

The value of the SWR when the reflection power is equal to the incident power is ____________

(a) 1

(b) 0

(c) ∞

(d) 2

This question was addressed to me during an interview.

My doubt stems from Standing Wave Ratio Method in division Modern Antennas & Antenna Measurements of Antennas

Answer 1

Correct option is (c) ∞

Explanation: The Reflection coefficient is \(ρ=\frac{P_{ref}}{P_{inc}} =1\) (Since there are reflections power and incident power are equal). The SWR S is given by

\(S=\frac{1+ρ}{1-ρ}=\frac{1}{0}=∞\)