Find the power reflected in a transmission line, when the reflection coefficient and input power are 0.45 and 18V respectively.(a) 3.645(b) 6.453(c) 4.563(d) 5.463I have been asked this question during an online interview.This question is from Reflection and Transmission Coefficients topic in chapter Transmission Lines of Electromagnetic Theory

Find the power reflected in a transmission line, when the reflection c

1.	Find the power reflected in a transmission line, when the reflection coefficient and input power are 0.45 and 18V respectively.(a) 3.645(b) 6.453(c) 4.563(d) 5.463I have been asked this question during an online interview.This question is from Reflection and Transmission Coefficients topic in chapter Transmission Lines of Electromagnetic Theory
Answer» CORRECT choice is (a) 3.645 Explanation: The ratio of the reflected to incident amplitudes gives the reflection. Similarly, the ratio of reflected to incident power gives square of the reflection COEFFICIENT. Thus Prefl = R^2Pinc. On substituting for R = 0.45 and Pinc = 18, we get Prefl = 0.45^2 x 18 = 3.645 units.

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