Affiliations: [a] Electronic Engineering Department, De Lin Institute of
Technology, Taipei, Taiwan, China | [b] Electrical Engineering Department, Tamkang University,
Tamsui, Taiwan, China
Correspondence:
[*]
Corresponding author: Wei Chien, Electronic Engineering
Department, De Lin Institute of Technology, Tucheng City, Taipei County, Taiwan
23656, China. E-mail: chiu@ee.tku.edu.tw
Abstract: In this paper, we investigate the imaging problem to determine both
the shape and the conductivity of a partially immersed non-uniform conducting
cylinder from the knowledge of scattered far-field pattern of TM waves by
solving the ill-posed nonlinear equation. Based on the boundary condition and
the measured scattered field, a set of nonlinear integral equations is derived
and the inverse problem is reformulated into an optimization one. The
steady-state genetic algorithm is then employed to find out the global extreme
solution of the object function. As a result, the shape and the conductivity of
the conductor can be obtained. Numerical results are given to demonstrate that
even in the presence of noise, good reconstruction can be obtained.
