Inverse scattering of a two-dimensional periodic conductor

Author

Ho, Cheng-Shun ; Chiu, Chien-Ching ; Lai, Eugene

Author_Institution

Electr. Eng. Dept., Tamkang Univ., Tamsui, Taiwan

fYear

2001

fDate

2001

Firstpage

449

Lastpage

452

Abstract

The image reconstruction of a two-dimensional periodic conductor by the genetic algorithm is investigated. A periodic conducting cylinder of unknown periodic length and shape scatters the incident wave in free space and the scattered field is recorded outside. Based on the boundary condition and measured scattered field, a set of nonlinear integral equations is derived and the imaging problem is reformulated into an optimization problem. The genetic algorithm is then employed to find out the global extreme solution of the cost function. As a result, the shape and the periodic length of the conductor can be obtained. Numerical results are given to demonstrate that even in the presence of noise, good reconstruction has been obtained

Keywords

conducting bodies; electromagnetic fields; electromagnetic wave scattering; genetic algorithms; image reconstruction; integral equations; inverse problems; nonlinear equations; periodic structures; 2D periodic conductor; boundary condition; cost function; free space incident wave; genetic algorithm; global extreme solution; image reconstruction; imaging problem; inverse scattering; measured scattered field; noise; nonlinear integral equations; optimization problem; periodic conducting cylinder; periodic length scatterers; periodic shape scatterers; permeability; permittivity; scattered field; two-dimensional periodic conductor; Boundary conditions; Conductors; Cost function; Genetic algorithms; Image reconstruction; Integral equations; Inverse problems; Noise shaping; Scattering; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar, 2001 CIE International Conference on, Proceedings

Conference_Location

Beijing

Print_ISBN

0-7803-7000-7

Type

conf

DOI

10.1109/ICR.2001.984734

Filename

984734