Advanced FDTD Subgridding: A High-Efficiency Algorithm Leveraging Model Order Reduction for Arbitrary Grid Refinement Ratios

This study introduces an advanced algorithm for Finite-Difference Time-Domain (FDTD) subgridding, enhancing efficiency through model order reduction, adaptable to any grid refinement ratio.The algorithm overcomes traditional FDTD limitations in handling complex geometries, particularly those requiring varied spatial resolutions.By integrating model order reduction, our approach not only maintains computational accuracy but also significantly reduces the computational cost, regardless of the grid refinement ratio.This development represents a substantial leap in electromagnetic simulation, offering a versatile and efficient solution for diverse and complex modeling scenarios.