A Scalable HPC-based Domain Decomposition Method for Multiphysics Modeling of RF Devices

In this paper, a large-scale electromagnetic-thermal-mechanical co-simulation solver is implemented for simulating complex radio frequency components by using a high performance computing framework. The proposed solver integrates the frequency-domain electric field simulation, with time-domain thermal and thermal induced stress simulations, via a multiphysics coupling iterative process. In order to speed up the co-simulation, a Krylov subspace method with a domain decomposition method (DDM) preconditioner is used. First, the developed multiphysics solver is verified with the commercial software COMSOL Multiphysics. Then, the parallel performance of our co-simulation solver, with different ghost mesh thicknesses, is tested on a supercomputer. Finally, some multiphysics results of filters and a real-world system-in-package (SiP) are obtained with our proposed solver.