HW8 - current sheet sinusoidally varying at a frequency of...

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1 ECE604 Homework 8 Out: Tuesday, March 9, 2004 (Session 17) Due: Tuesday, March 23, 2004 (Session 19) [Students with tape delays: due according to session number] Problem numbers are from the text by Ramo, Whinnery and Van Duzer (3 P rd P edition, 1994). 1) 5.7c 2) 5.7d 3) 5.8a 4) 5.8c 5) 5.8d 6) 5.8e 7) Consider a parallel plate transmission line made of perfectly conducting plates. The plates are 5mm wide and spaced by 250 µ m and the medium between the plates is air. The characteristic impedance of the transmission line is denoted by Z o . At one end the transmission line is connected to a short circuit, while at the other end the transmission line is connected to a matched load (R L = Z o ). The transmission line is driven by a
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Unformatted text preview: current sheet sinusoidally varying at a frequency of 10 GHz, separated a distance d from the short circuit. The total length of the transmission line is 10 cm. a) Where should the current sheet be placed to maximize the power delivered to the load resistor R L ? (What is the value of d?) A short answer is acceptable provided it is justified. b) Now the short circuit at z = 0 is replaced by an open circuit. Now where should the current sheet be placed to maximize the power delivered to the load resistor? 250m R L = Z o current sheet (extends 5 mm into paper) perfectly conducting plates (extend 5 mm into paper) short circuit z = 0 z= d z = 10 cm z I...
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