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Home Transmission Lines Input Impedance of Any Open- Circuited Line
 
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Input Impedance of Any Open-Circuited Line

The driving-point, or input, impedance of any such line or cable can be found by letting Zr of equation 58 equal infinity. Or, it can be found as will be explained. When the distant end of a line is open the current at that point must be zero; thus, equation 23 becomes

and equation 24 equals

The sending-end impedance of the open-circuited line will be

since

and by equation 35

Equation 60

can also be written

because from equation 50 the characteristic impedance


Home Transmission Lines Input Impedance of Any Open- Circuited Line

Last Update: 2011-05-18