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HW9 Solutions

# HW9 Solutions - Chapter 3 Solutions 3.1 Fill in the blank...

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3.1 Fill in the blank: Complete reflection occurs if the load is either a short circuit or an open circuit. 3.2 Fill in the blank: The reflection coefficients of an open circuit, short circuit, and matched circuit are +1 , –1 , and 0 , respectively.

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3.5 Consider an initially uncharged transmission line with transit time T , generator reflection coefficient ! G = – ! , and load reflection coefficient L = ! . At t = 0 a DC source of 16 V is connected to the generator end of the line. Plot the voltage observed at the input end of the line, at the load end of the line, and at a point " of the distance to the load, for the time interval 0 < t < 6 T . In the plots, (a) is at the load end, (b) is at the input end, and (c) is at " d :
3.6 In the system shown below, the line has a one-way transit delay of T seconds. The line is completely discharged for t ! 0. For the following source and component values, construct a reflection diagram for the system and plot the input voltage V in and the load voltage V L for the time interval 0 < t < 6 T : (a) V S = 12 V, R G = 25 ! , Z 0 = 50 ! , and R L = 200 ! . For 0 < t < 2 T : V in = 8.0 V For 2 T < t < 4 T : V in = 11.2 V For 4 T < t < 6 T : V in = 10.56 V For 0 < t < T : V L = 0.0 V For T < t < 3 T : V L = 12.8 V For 3 T < t < 5 T : V L = 10.24 V For 5 T < t < 7 T : V L = 10.752 V (b) V S = 12 V, R G = 25 ! , Z 0 = 50 ! , and R L = 20 ! . For 0 <

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HW9 Solutions - Chapter 3 Solutions 3.1 Fill in the blank...

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