An Augmented Y-parameter Method for Macromodeling Electromagnetic Structures in the Presence of Plane-Waves

This work presents a novel modeling approach to characterize microwave structures in the presence of external electromagnetic waves. The method relies on augmenting traditional network parameters such as Y-parameters with an increased number of columns to account for the inclusion of Vector Spherical Wave Functions (VSWFs) in the voltage vector. Once extracted, the proposed augmented Y-parameter model can then be used for real-time computation of port currents corresponding to numerous parametric changes that can alter the incident wave, thereby aiding in rapid circuit design and optimization exercises.