Time-domain simulation of electromagnetic fields based on reduced-order models residing in the frequency domain

This work presents a method for constructing compact time-domain models from finite-element simulations in the frequency-domain. To reduce the system dimension and speed up computation times, model-order reduction techniques are applied. The resulting reduced-order system is proven to be passive. The proposed method does not only provide the output of the system, but it also enables the reconstruction of the electromagnetic fields.