An efficient and simple approach to suppressing the high-frequency power/ground plane noise

This paper presents a new method to suppress the power/ground (P/G) plane noise commonly encountered in high-speed digital and mixed-signal systems. This method is based on modifying the conventional power/ground cavity model by utilizing the inhomogeneous medium in the power/ground structure. The usage of this inhomogeneous medium leads to the appearance of the nonconstant-coefficient first-order derivative terms of the model equation. These terms allow us to control and to change the geometrical property of the model solution if the coefficients are properly selected. We will show that by adjusting the parameters of the coefficient functions, the resonance of the structure can be completely eliminated. The Finite-Difference Time-Domain (FDTD) simulation for the power/ground plane structure demonstrates the effectiveness of the method.