Title :
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
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;
Conference_Titel :
Radar, 2001 CIE International Conference on, Proceedings
Conference_Location :
Beijing
Print_ISBN :
0-7803-7000-7
DOI :
10.1109/ICR.2001.984734
