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2010-09-07

Time-Domain Inverse Scattering of a Two-Dimensional Metallic Cylinder in Slab Medium Using Asynchronous Particle Swarm Optimization

By Chi-Hsien Sun, Chien-Ching Chiu, and Ching-Lieh Li
Progress In Electromagnetics Research M, Vol. 14, 85-100, 2010
doi:10.2528/PIERM10051101

Abstract

This paper presents asynchronous particle swarm optimization (APSO) applied to the time-domain inverse scattering problems of two-dimensional metallic cylinder buried in slab medium. For this study the finite-difference time-domain (FDTD) is employed for the analysis of the forward scattering part, while for the APSO is applied for the reconstruction of the two-dimensional metallic cylinder buried in slab medium, which includes of the location and shape the metallic cylinder. For the forward scattering, conceptually several electromagnetic pulses are launched to illuminate the unknown scatterers, and then the scattered electromagnetic fields around are measured. In order to efficiently describe the details of the cylinder shape, sub-gridding technique is implemented in the finite difference time domain method. Then, the measured EM fields are used for inverse scattering, in which APSO is employed to transform the inverse scattering problem into optimization problem. By comparing the measured scattered fields and the calculated scattered fields, the shape and location of the metallic cylinder are reconstructed. In addition, the effects of Gaussian noises on imaging reconstruction are also investigated.

Citation


Chi-Hsien Sun, Chien-Ching Chiu, and Ching-Lieh Li, "Time-Domain Inverse Scattering of a Two-Dimensional Metallic Cylinder in Slab Medium Using Asynchronous Particle Swarm Optimization," Progress In Electromagnetics Research M, Vol. 14, 85-100, 2010.
doi:10.2528/PIERM10051101
http://www.jpier.org/PIERM/pier.php?paper=10051101

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