Practice Test 1

# Practice Test 1 - PRACTICE PROBLEMS FOR TEST1 PROBLEM 1(a...

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P RACTICE P ROBLEMS FOR T EST 1 P ROBLEM 1: (a) Express the input impedance of a lossless transmission line in terms of its characteristic impedance, length and wavelength? (b) A lossless transmission line is terminated in a short circuit. How long (in wavelengths) should the line be for it to appear as an open circuit at its input terminals? (c) At what frequency does a lossless transmission line become transparent to the generator? P ROBLEM 2: (a) Using a lumped circuit model derive the wave equation for a transmission line. (b) What are the necessary conditions for the transmission line to be considered loss-less? P ROBLEM 3: (a) Show that the input impedance of an infinitely long transmission line is ~Z o . (b) What is the average power delivered by a loss-less line to a reactive load? (c) The voltage standing wave ratio of a mismatched, loss-less transmission line increases by a factor of 5 compared with its value with a matched load. What is the corresponding decrease in the power delivered to the mismatched load.

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Practice Test 1 - PRACTICE PROBLEMS FOR TEST1 PROBLEM 1(a...

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