Microwave imaging of a periodic homogeneous dielectric object buried in rough surfaces

Chien-Ching Chiu, Gang-Ze Lee, Hao Jiang and Bo-Jie Hong

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 14, 1905-1919

Abstract: This paper presents the reconstruction of a periodic homogeneous dielectric object buried in rough surfaces. First, a TM (Transverse Magnetic) polarized wave is transmitted through the surface to a buried object. Integral equations are derived by using the Maxwell equation, the two-dimensional periodic Green function, Green identity and the boundary condition. The integral equations are solved numerically by the method of moment (MOM) to obtain the scattering field. The problem of inverse scattering is transformed into an optimization problem. Next, the Self-Adaptive Dynamic Differential Evolution (SADDE) method is used for object reconstruction. Numerical results show that the SADDE converges to the overall extreme value (global extreme) regardless of the initial guess. We have found that the convergence speed of the periodic length is always better than the shape function and dielectric constant. Moreover, we can still obtain good reconstruction results even if the noise is added in the scattered field.

Date: 2019
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DOI: 10.1080/09205071.2019.1653229

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