12Electromagnetic Pulse and Voltage Transients
This chapter develops an impedance ratio according to the following ideas. The circuit discussed here consists of a battery, a transmission line, and a switch. The far end of the transmission line is either a short or an open. The battery has an output impedance, Z, that equals the impedance of the transmission line. When the switch is closed, a step function travels down the line at the velocity of propagation. The voltage divides between the characteristic impedance of the line and the source impedance. The main interest to us is related to how the far end is terminated, or not, as the case may be. If the line is open at the far end, the voltage doubles. The pulse energy travels back at the same ...
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