Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 50

A lossy transmission line with characteristic impedance Z 0 is terminated in an arbitrary load impedance Z L.
Express the standing-wave ratio S on the line in terms of Z 0 and Z L.
Find in terms of S and Z 0 the impedance looking toward the load at the location of a voltage maximum.
Find the impedance looking toward the load at a location of a voltage minimum.