Fast-converging, Stable Network Model for Interconnection Structures Facilitating Arbitrary MoM Formulations

An inherently stable broadband Foster-type circuit model for 3D-interconnection networks with weakly coupled modes is presented. By solving a quasistatic Method-of-Moments-eigenvalue equation along with its adjoint problem a modal multiport circuit is derived with minimal computational effort, offering fast convergence and inherent stability for time-domain simulations with arbitrary active/passive non-linear loads. Estimation of the required model order can be immediately achieved for a given frequency range. Externally coupled fields are considered by additional modal sources, which are calculated with minimal effort. The validity is demonstrated by an example interconnecting structure in the frequency and time domain.