Time-domain simulation of electromagnetic fields based on frequency-domain reduced-order models including Debye materials

This contribution presents a new technique for constructing time-domain models from finite-element based simulation data in the frequency-domain, including frequency-dependent materials of Debye type. In order to reduce computational costs, projection-based model-order reduction techniques are applied. Not only do they provide an accurate input/output description of the system but also allow for reconstructing the electromagnetic fields. The resulting reduced-order model is proven to be passive, which is crucial for preserving causality in time-domain simulations.