Topology Optimization of Multiband Dielectric Resonator Antennas Using Finite-Difference Time-Domain Method

In this research, we propose a new topology optimization method for the design of dielectric resonator antennas (DRAs) aiming to operate with enhanced bandwidths at multiple operational bands, using the finite difference-time domain (FDTD) method for electromagnetic analysis and the finite element method (FEM) for structural mechanics analysis. First, the concept of topology optimization is briefly discussed, and a way to integrate topology optimization with the FDTD method and the FEM is proposed. Next, a DRA design example is presented to confirm the usefulness of the proposed method.