GATE EC 2017 Set 2 — Question 25
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Electromagnetics → Transmission Lines → VSWR & Return Loss
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Question
A two-wire transmission line terminates in a television set. The VSWR measured on the line is 5.8. The percentage of power that is reflected from the television set is ___________
Correct answer
48 to 51
Solution
Given the Voltage Standing Wave Ratio (VSWR), denoted as .The magnitude of the reflection coefficient () is calculated using the formula:Substituting the given value:The fraction of power reflected from the load is given by the square of the magnitude of the reflection coefficient ():To find the percentage of power reflected:Thus, the percentage of power reflected from the television set is approximately 49.83%.
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