Coupled Lossy Transmission Line Characterization and Simulation

It has been shown that the frequency domain solution of the coupled lossy transmission line differential equations has a similar appearance to that of the single line. The frequency-dependent n × n characteristic admittance matrix Y
0
and propagation matrix Γ can be obtained from network analyzer insertion loss data treating the coupled transmission lines as a 2n-port network. This paper develops a transient simulation technique for coupled lossy transmission lines based on frequency-dependent Y
0
and Γ data. Simulation results agree very well with transient measurements.