An Efficient SPICE-Compatible Model for Striplines Including Cavity Resonant Effect

In this paper, an efficient SPICE-compatible cavity resonant model for nonideal striplines including power noise coupling is proposed based on mode decomposition theory. According to the mode decomposition theory, the model for nonideal striplines includes two parts-transmission lines and power plane pairs-which are modeled by cavity resonant model purely. Two efficient methods, the double-frequency approximation for power plane pairs, and the Padé approximation for transmission lines, are proposed for model simplification, which are verified by rigorous error analysis and comparison with the typical modeling method available. Finally, an efficient SPICE-compatible cavity resonant model for nonideal striplines including power noise coupling is given and verified in the time and frequency domains by comparison with the typical modeling method available.