Computation of the Electrostatic Parameters of a Multiconductor Digital Bus

study of the quasielectrostatic parameters of a multiwire digital bus embedded in substrate between two ground planes is presented in this paper. The bus capacitance-per-unit-length matrix is derived from the conductor geometry using quasi-analytical technique based on the numerical inversion of the Schwarz-Christoffel conformal mapping, and on even-odd mode analysis. For the sake of finding a closed-form frequency domain solution of the transmission line equations the obtained matrices are diagonalized.