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If there are no any reflections, then the value of the SWR will be ________________(a) 1(b) 0(c) ∞(d) 2I got this question in an online interview.I want to ask this question from Standing Wave Ratio Method topic in chapter Modern Antennas & Antenna Measurements of Antennas

Answer»

Right choice is (a) 1

Easiest EXPLANATION: The STANDING wave ratio is DEFINED as the maximum voltage to minimum voltage.

\(S=\frac{V_{max}}{V_{min}} =\frac{1+ρ}{1-ρ}\)

And reflection coefficient is \(ρ=\frac{P_{ref}}{P_{INC}} =0 \) (Since there are no REFLECTIONS).

\(S=\frac{1+ρ}{1-ρ}=1\)


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