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Application of finite-difference time domain and dynamic differential evolution for inverse scattering of a two-dimensional perfectly conducting cylinder in slab medium

[+] Author Affiliations
Chi-Hsien Sun

Tamkang University, Electrical Engineering Department, No. 151 Yingjhuan Road, Danshuei Township, Taipei County 251, Tamsui, Taiwan

Chien-Ching Chiu

Tamkang University, Electrical Engineering Department, No. 151 Yingjhuan Road, Danshuei Township, Taipei County 251, Tamsui, Taiwan

Wei Chien

De Lin Institute of Technology, Electronic Engineering Department, No. 1 Lane 380 Qingyun Road, Tucheng City, Taipei County 236, Taiwan, R.O.C.

Ching-Lieh Li

Tamkang University, Electrical Engineering Department, No. 151 Yingjhuan Road, Danshuei Township, Taipei County 251, Tamsui, Taiwan

J. Electron. Imaging. 19(4), 043016 (December 06, 2010). doi:10.1117/1.3514737
History: Received January 06, 2010; Revised September 16, 2010; Accepted September 21, 2010; Published December 06, 2010; Online December 06, 2010
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We apply the dynamic differential evolution (DDE) algorithm to solve the inverse scattering problem for which a two-dimensional perfectly conducting cylinder with unknown cross section is buried in a dielectric slab medium. The finite-difference time domain method is used to solve the scattering electromagnetic wave of a perfectly conducting cylinder. The inverse problem is resolved by an optimization approach, and the global searching scheme DDE is then employed to search the parameter space. By properly processing the scattered field, some electromagnetic properties can be reconstructed. One is the location of the conducting cylinder, the others is the shape of the perfectly conducting cylinder. This method is tested by several numerical examples, and it is found that the performance of the DDE is robust for reconstructing the perfectly conducting cylinder. Numerical simulations show that even when the measured scattered fields are contaminated with Gaussian noise, the quality of the reconstructed results obtained by the DDE algorithm is very good.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Chi-Hsien Sun ; Chien-Ching Chiu ; Wei Chien and Ching-Lieh Li
"Application of finite-difference time domain and dynamic differential evolution for inverse scattering of a two-dimensional perfectly conducting cylinder in slab medium", J. Electron. Imaging. 19(4), 043016 (December 06, 2010). ; http://dx.doi.org/10.1117/1.3514737


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