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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118813

    Title: Inverse Scattering of a Periodic Inhomogeneous Dielectric Scatterer
    Authors: Chiu, Chien Ching;Hong, Bo Jie;Hao, Jiang
    Keywords: Microwave imaging;inhomogeneous dielectric scatterer;rough surface;Green’s identity;self-Adaptive dynamic Differential evolution (SADDE);Asynchronous particle Swarm optimization (APSO)
    Date: 2020-05-26
    Issue Date: 2020-07-01 12:10:17 (UTC+8)
    Publisher: Taylor & Francis
    Abstract: This paper is to reconstruct the periodic inhomogeneous dielectric distribution of the scatterer buried in the rough surface. In order to explore the dielectric coefficient distribution of the unknown dielectric object under the rough surface, we emit electromagnetic wave to the object and measure the scattered electromagnetic wave above the rough surface. Base on Green’s identity and the induced current concepts, the nonlinear integral equation can be derived and solved by the method of moments. Next, the inverse scattering problem is converted into an optimization problem. We use Self-Adaptive Dynamic Differential Evolution (SADDE) and Asynchronous Particle Swarm Optimization (APSO) to find the extreme value of the problem. With the regularization technique, the reconstruction is good. When the noise is less than 1%, the dielectric constant can also be achieved successfully. Numerical results show that SADDE can reduce the error for the permittivities of the object better than the APSO.
    Relation: Journal of Electromagnetic Waves and Applicationss 34(8), p.1015-1028
    DOI: 10.1080/09205071.2020.1769503
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Journal Article

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