Recent Advances in Multiphysics Optimization for Microwave Filters Using Space Mapping Techniques

Multiphysics analysis, which involves the EM domain with other physics domains, is increasingly important for high-performance microwave components to obtain an accurate system design. This paper provides an overview of the recent advances in multiphysics optimization using space mapping techniques. A space-mapping-based surrogate model including an EM domain coarse model and two mapping functions is presented. By exploiting the knowledge of the coarse model established by relatively inexpensive EM data, this technique can provide a larger and more efficient optimization update in each optimization iteration, consequently obtaining optimal solutions faster than the existing multiphysics optimization without space mapping. A high power microwave filter is used to illustrate this technique.