A Novel Automatic Pole Determination Method for Macromodeling Multi-Port Interconnect Systems

Abstract

With the increasing bandwidth and frequency, the geometric complexity of packaging, board-level, and interconnect systems are continuously increased. Direct full-wave electromagnetic simulation of these passive systems consumes enormous computational resources. To simplify the analysis, macromodeling the electromagnetic responses of passive systems has become common practice. Although vector fitting is an excellent macro-modeling method, it typically requires users to manually specify the fitting order, which determines the accuracy. In this paper, a universal automatic pole determination method is proposed for vector fitting to achieve accurate macromodeling for single-input/multiple-output systems. This approach directly produces a rational function macromodel from the given electromagnetic response, and it performs robustly on both systems with noise and large-scale multiport interconnect systems.