Fast Simulation of PCB/IC/Flex Circuit Assembly Using Partial Element Equivalent Circuit Method

Partial Element Equivalent Circuit (PEEC) is a popular method for combined EM and circuit analysis. It can be very effectively applied to represent three-dimensional printed circuit boards (PCB) and on-chip multi-conductor structures as a set of circuit elements to be calculated with SPICE like solvers. In this paper, we demonstrate new representation of PEEC method, where geometry can be accurately modeled by surface triangles that are clustered into surface patches. Size, shape and position of such patches depend on PCB layout and thus the number of triangles does not influence the number of circuit elements in PEEC model. RLCG matrix for each segment of the graph, that represents the PCB layout, is calculated using full-wave special low-frequency MoM solvers. Demonstration of accuracy and effectiveness of described approach is performed using PCB/IC/Flex assembly simulation.