Performance Analysis and Application of Electromagnetic Time Reversal in Source Reconstruction using Finite Difference Time Domain (FDTD) method

Abstract

Source reconstruction is a type of an electromagnetic inverse problem that has a wide range of applications. Using the time reversal invariance property of the Maxwell’s equations, reconstruction of electromagnetics sources can be realized. In this thesis, the time reversal is achieved using the Finite Difference Time Domain (FDTD) algorithm. The working of such a time reversal operation is demonstrated in a two and a three-dimensions. A part of the thesis is focused on the comparison of the quality of the reconstructed sources with different parameters of the experimental setup. A second method that is used for accurate reconstruction is analyzed with its limitations elaborated. A different method is then presented to fix the limitations of the previous method of time reversal as another part of the thesis. The final part of the thesis simulates a different set-up and checks the validity of using time reversal for a practical application.