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The range of the standing wave ratio is(a) 0 < S < 1(b) -1 < S < 1(c) 1 < S < ∞(d) 0 < S < ∞This question was posed to me in exam.The query is from Standing Waves and SWR in portion Transmission Lines of Electromagnetic Theory

Answer»

The correct OPTION is (c) 1 < S < ∞

Easiest explanation: The standing wave ratio is GIVEN by S = 1 – R/1 + R. Thus the minimum VALUE of S is 1. It can EXTEND upto infinity for long lines. Thus the range is 1 < S < ∞.



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