chap13 016 - 13.13 PROBLEMS 13.49 inductance of L = 10‘9...

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Unformatted text preview: 13.13. PROBLEMS 13.49 inductance of L = 10‘9 H: l 77H. rill/IllllliflllllIIlllpllllllllljt111111111111];IIIIIIIJIIJIIL Figure 13.51: Transmission line with inductive source and unmatched load. a. If the source voltage is a step function given by V5,(t) = 1u(t), find and plot the voltages V+(z, t), V_(z,t), V(z, t) (total) on the transmission line at time t = 6/(211). b. If the source voltage is a step function given by V3(t) = 1u(t), find and plot the voltages V+(z, t), V_(z,t), V(z, t) on the transmission line at time t = 00. c. For this part, assume that a source with a voltage of 1 Volt has been applied for a long, long time (i.e., it was turned on at time t = —oo). At time t = 0, the source voltage is turned off (i.e., Vs(t) = [1 — u(t)]). Find and plot the voltages V+(z,t), V_ (z,t), and V(z, t) on the transmission line at time t = E/(2v). Problem 13.39: The air-dielectric transmission line shown in Figure 13.52 below Figure 13.52: Driving a transmission line with a pulse. is 0.09 In long and has a characteristic impedance of R = 50. The generator and load resistances are Ry = 25 Q and RL = 100 (2, respectively. The generator creates a 12—volt pulse lasting 0.1 ns. Plot the load-voltage waveform for several bounce times. Problem 13.40: The switch is closed in the circuit shown in the Figure 13.53 at t = 0. a. Find the reflection coefficients at both ends. b. What is the final voltage and current in the load after a long time? c. Construct the appropriate bounce diagram and answer table following the models shown below in Figures 13.54 and 13.55. (1. Plot the current at the load as a function of time in units of the one-way bounce time. ...
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