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The power transmitted by a wave with incident power of 16 units is(Given that the reflection coefficient is 0.5)(a) 12(b) 8(c) 16(d) 4The question was posed to me in quiz.The origin of the question is Power, Power Loss and Return Loss topic in chapter EM Wave Propagation of Electromagnetic Theory

Answer»

The correct answer is (a) 12

The best EXPLANATION: The fraction of the TRANSMITTED to the incident POWER is given by the reflection coefficient. Thus Pref = (1-R^2) Pinc. On substituting the given data, we GET Pref = (1- 0.5^2) x 16 = 12 units. In other words, it is the remaining power after reflection.



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