A Logarithmic Transmission Line Chart

A chart is presented which relates the real and imaginary components of the impedanceat any position along a transmission line to the magnitude and location of the standing wave. In the present chart the ordinate is R/Z/sub 0/ plotted logarithmically and the abscissa is a function of X/R. Thus a change in the reference impedance becomes a simple vertical translation of any point. An auxiliary chart permits the direct determination of the length and impedance of transmission line required to match a given impedance.