Semi-infinite line traveling wave

It should be noted that the definition of Equation 1.202 proposed by the author in 1973 is effective only for a semi-infinite line or for a time period of 2t, where x is the traveling time of a line [20,21]. Also, the defiiution requires further study in conjunction with the wave equation in the time domain because it has not been proved that this definition expresses the physical behavior of the time-dependent characteristic impedance. 

Resistance-terminated line A resistance is equivalent to a semi-infinite line whose surge impedance is the same as the resistance as explained in Section 1.6.2.1 and in Figure 1.33. If the surge impedance of the semi-infinite line is taken to be the same as that of the line to which the resistance is connected, then a backward traveling wave + ct) = ej, is to be placed on the semi-infinite line ... 

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See also in sourсe #XX -- [ ]

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