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TLINE: Software for sinusoidal steady‐state analysis of transmission lines

This article describes the use of the software package TLINE, which includes three programs for the sinusoidal steady‐state analysis of transmission lines. The first program provides analysis of the tandem connection of several transmission lines with the possibility of including PI, T, or L lumped‐element discontinuity junctions between the transmission lines. The other two programs are related to analysis of impedance matching using single and double stubs. All analysis procedures are graphically displayed on Smith charts. Output files that include numerical values of input impedances, values of time‐average powers, and reflection coefficients at various sections of a tandem transmission line system are included. The TLINE software package is used to train students on the use of the Smith chart and also to help in the teaching and demonstration of various transmission line and impedance‐matching concepts.