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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/91628

    Title: Electromagnetic scattering of metallic cylinders of arbitrary shape by using asynchronous particle swarm optimization and non-uniform steady state genetic algorithm
    Authors: Li, Ching-Lieh;Sun, Chi-Hsien;Chiu, Chien-Ching;Tuen, Lung-Fai;Su, Chien-Hua
    Contributors: 淡江大學電機工程學系
    Keywords: Inverse scattering;microwave image;buried conductors;asynchronous particle swarm optimization;genetic algorithms (SSGA);half space
    Date: 2013-04-02
    Issue Date: 2013-07-23 12:19:19 (UTC+8)
    Publisher: Amsterdam: IOS Press
    Abstract: Two techniques for the shape reconstruction of multiple metallic cylinders from scattered fields are investigated in this paper, in which two-dimensional configurations are involved. After an integral formulation, the method of moment (MoM) is applied to solve it numerically. Two separate perfect-conducting cylinders of unknown shapes are buried in one half-space and illuminated by the transverse magnetic (TM) plane wave from the other half space. Based on the boundary condition and the measured scattered field, a set of nonlinear integral equation is derived and the imaging problem is reformulated into optimization problem. The non-uniform steady state genetic algorithm (NU-SSGA) and asynchronous particle swarm optimization (APSO) are employed to find out the global extreme solution of the object function. Numerical results demonstrate even when the initial guesses are far away from the exact shapes, and the multiple scattered fields between two conductors are serious, good reconstruction can be obtained. In addition, the effect of Gaussian noise on the reconstruction results is investigated and the numerical simulation shows that the reconstruction results are good and acceptable, as long as the SNR is greater than 20 dB.
    Relation: International Journal of Applied Electromagnetics and Mechanics 42(3), pp.349-358
    DOI: 10.3233/TAD-131669
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Journal Article

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