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The minimum impedance of a 75 ohm transmission line with a SWR of 2.5 is(a) 100(b) 50(c) 25(d) 30I had been asked this question by my school teacher while I was bunking the class.Query is from Standing Waves and SWR topic in section Transmission Lines of Electromagnetic Theory

Answer»

Correct option is (d) 30

The explanation: The minimum IMPEDANCE in terms of SWR is GIVEN by ZMIN = Zo/S.Substituting the given DATA for S = 2.5 and Zo = 75, we GET Zmin = 75/2.5 = 30.



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