Modeling of Crosstalk Between Two Nonparallel Striplines on Adjacent Layers

Crosstalk between two nonparallel striplines on adjacent layers is investigated. An equivalent per unit length model for nonparallel lines is developed based on multiconductor transmission line theories and the Nelder-Mead optimization algorithm. The physical meaning of the equivalent model is explained for different test geometries. Empirical formulas, as functions of various geometric parameters, are derived based on multivariable curve fitting for a set of defined trace geometries. The validity of the empirical model is confirmed through comparison with different test examples.