Electromagnetic-Thermal-Stress Multiphysics Simulation of Microwave Filter

An electromagnetic-thermal-stress multiphysics simulation method for microstrip filter is proposed in this paper. The discontinuous Galerkin time-domain (DGTD) method is used to solve the Maxwell equations for electromagnetic simulation. Thermal simulation is based on the finite-element time-domain (FETD) method to solve the heat conduction equation. Stress simulation is realized through the finite element (FEM) method. The coupling of thermal simulation and stress simulation is achieved through thermal stress. The mesh information of the model is updated through node displacement, and then electromagnetic simulation is carried out. Finally, this method is used for the analysis of microstrip filters.