Spectral FDTD in the analysis of periodic structures.

摘要

This dissertation is focused on modifying FDTD for an efficient analysis of periodic structures. A new method referred to as spectral FDTD is presented that provides a more efficient tool than previous available techniques for the analysis of 2D and 3D periodic structures. It is discussed that the main idea behind SFDTD is to use constant wavenumber waves in time domain for both excitation and eigenvalue problems. Last chapter of this dissertation is devoted to the concept of reciprocal space and shows its usefulness in electromagnetic for the structures that a source radiates from the center of periodic structures or metamaterials.