A Study on Optimization of Loaded Magnetic Materials for Antenna Miniaturization

The Topology Optimization has significantly been expanded to many optimization problems. We used the Topology Optimization to optimize the configuration and arrangement of the magnetic materials, which were inserted in PIFA on an infinite ground plane. In this optimization, the finitedifference time-domain (FDTD) method and the adjoint variable method (AVM) [3] were used, and design parameters were permittivity and permeability of the materials. As a result, it was found that the resonance frequency was effectively lowered by utilizing the optimal configuration of the magnetic materials. In this paper, we apply the Topology Optimization to PIFA on a finite ground plane, which is used in practice, and confirm its validity as compared with the results calculated by other simulator.