Analysis of signal propagation on high-speed planar interconnect systems based on full-wave and macromodeling techniques

Abstract

An accurate and systematic approach for the analysis of signal propagation at high-speed planar interconnect systems is proposed in this paper. The approach integrates a macromodeling technique based on the full-wave time domain method and rational function approximation together with the SPICE circuit simulation. The admitance Y transfer function in the form of a set of discrete frequency sampling data is established by using the full-wave finite-difference time-domain (FDTD) method, which characterizes the high-speed planar interconnect subnetwork. Thereafter, the macromodel of the interconnect subnetwork is constructed through rational function approximation by using the Vector fitting method, which results in an accurate and robust solution for the overall problem. Subsequently, the resultant macromodel can be synthesised and converted to a SPICE-compatible equivalent circuit. Therefore, the signal propagation analysis is finally facilitated and expedited by using the SPICE circuit simulator. Numerical experiments are presented in this paper to verify the accuracy and efficiency of the proposed method.