ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 1 September 2012
Page Count: 11

Solving an Inverse Scattering Problem of an Embedded Perfectly Conducting Cylinder by Asynchronous Particle Swarm Optimization

Chiu, Chien-Ching
Electrical Engineering Dept., Tamkang Univ., Tamsui,

Hsu, Jung-Chin
Electrical Engineering Dept., Tamkang Univ., Tamsui,

Hsiao, Wei-Chun
Electrical Engineering Dept., Tamkang Univ., Tamsui,

(Received 18 June 2011; accepted 10 April 2012)

Abstract

We present a computational approach to the imaging of a two-dimensional (2D) embedded perfectly conducting cylinder by the asynchronous particle swarm optimization (APSO). An embedded conducting cylinder of unknown shape scatters the incident transverse magnetic (TM) wave in a half space while the scattered field is recorded outside. Based on the boundary condition and the measured scattered field, a set of nonlinear integral equations is derived and the imaging problem is reformulated into an optimization problem. The inverse problem is solved by an optimization approach and the global searching scheme, the asynchronous particle swarm optimization is then employed to search the parameter space. This method is tested by several numerical examples, and it is found that the performance of the APSO 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 APSO algorithm is very good.

Keywords:
inverse scattering, embedded conductor, asynchronous particle swarm optimization, transverse magnetic wave

Paper ID: JTE104134
DOI: 10.1520/JTE104134
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