An efficient approach for the power/ground plane equivalent circuit extraction

Power/ground plane structure is widely used for power distribution purposes in multi-layer printed circuit board (PCB) design. The characteristic of board cavity may cause signal resonance at some frequencies and can lead to signal integrity (SI) and electromagnetic interference (EMI) concerns. An efficient method to extract the equivalent circuit of the power bus is proposed in this paper. With extracted equivalent circuit, time domain response of the power bus can be easily analyzed at the early design stage so that necessary measures to eliminate or minimize potential EMI problems can be implemented.