Coupling DGTD and Behavioral Macromodel for Transient Heterogeneous Electromagnetic Simulations

A novel transient field-circuit cosimulation method based on the discontinuous Galerkin time domain (DGTD) method and circuit behaviour macromodels for heterogeneous electromagnetics such as EMC problems is proposed. The traditional field-circuit simulation method needs to know the detail of the circuits, which cannot handle problems with unknown systems due to IP protections. To overcome this problem, the proposed method utilizes the artificial neural network (ANN) to create trainable behavioral macromodels of the unknown circuits based on the port currents and port voltages. The obtained macromodel is then coupled with DGTD that describes the behavior of electromagnetic subsystem to form equations of the whole system, which can be solved to obtain transient fields, voltages and currents. Numerical examples have been benchmarked to demonstrate the capability of the proposed method.