In radio frequency (RF) and microwave design optimization, electromagnetic (EM) simulation is crucial yet time-consuming. Solving extensive system equations is computationally expensive for finite-element method (FEM)-based EM simulation. In addition, during optimization, changes to the EM structure are often incremental, leading to inefficiencies in generating and solving new FEM system equations. To address this situation, this article proposes a novel design space decomposition (DSD) technique to rapidly calculate the EM response ( $S$ -parameter) of EM waveguide structures featuring newly ...
