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The transmission coefficient in a wave travelling through two media having intrinsic impedances of 5.5 and 1.33 is(a) 0.389(b) 0.55(c) 0.133(d) 0.42This question was posed to me during an interview.This question is from Reflection and Transmission Coefficients in chapter Transmission Lines of Electromagnetic Theory

Answer»

The correct ANSWER is (a) 0.389

To explain: The transmission coefficient is terms of the INTRINSIC impedance is given by T = 2η2/η1 + η2. On SUBSTITUTING for η1 = 5.5 and η2 = 1.33, we GET T = 2 x 1.33/1.33 + 5.5 = 2.66/6.83 = 0.389.



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