ANALYSIS OF CROSSTALK AND FIELD COUPLING TO LOSSY MTLS IN A SPICE ENVIRONMENT

This paper proposes a circuit model for lossy multiconductor transmiss ion lines (MTL's) suitable for implementation in modern SPICE simulato rs, as well as in any simulator supporting differential operators. The model includes the effects of a uniform or nonuniform disturbing fiel d illuminating the line and is especially devised for the transient si mulation of electrically long wideband interconnects with frequency de pendent per-unit-length parameters, The MTL is characterized by its tr ansient matched scattering responses, which are computed including bot h de and skin losses by means of a specific algorithm for the inversio n of the Laplace Transform. The line characteristics are then represen ted in terms of differential operators and ideal delays to improve the numerical efficiency and to Simplify the coding of the model in exist ing simulators, The model can be successfully applied to many kinds of interconnects ranging from micrometric high-resistivity metallization s to low-loss PCB's and cables, and can be considered a practical exte nsion of the widely appreciated lossless MTL SPICE model, of which mai ntains the simplicity and efficiency.