Substrate-geometry aware 2-port modeling for surface-mount passive components

Abstract

Electrical modeling methodology for surface-mount passive components is proposed. In order to accurately capture parasitic inductance, the proposed 2-port model accounts for surrounding ground layer configurations of the print circuit board (PCB) on which the component is mounted. Our model retains conventional modeling paradigm in which component suppliers provide their customers with simulation models characterized independently of the customers' PCB. We also present necessary corrections that compensate missing magnetic coupling between the models. Impedance of a power distribution network is experimentally analyzed being non-separated modeling as the reference. The proposed model achieved very good match with the reference result reducing 10-30% error of the conventional model to within 1%.