Microwave imaging with a time-reversed finite-difference time-domain technique

Abstract

A novel approach to microwave imaging in three dimensions based on time-reversed finite-difference time-domain method (FDTD-TR) is presented. The proposed computationally efficient technique allows the reconstruction of detailed images of scattering objects. Transmissions as well as reflection imaging modalities in the near-field and far-field were investigated. In this study, we implemented the FDTD-TR algorithm in three dimensions using time-reversed convolutional perfectly matching layers as boundaries to truncate the simulation domain. The method works for dielectric as well as conducting objects. The method’s capabilities in imaging multiple objects and behind-the-wall imaging are also presented.

Keywords:

• microwave imaging
• image reconstruction
• FDTD time-reversal
• behind-the-wall imaging