Journal of Applied Science and Engineering

Published by Tamkang University Press

1.30

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1.60

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Wei Chien1 , Chi-Hsien Sun2 and Ming-Hung Wu This email address is being protected from spambots. You need JavaScript enabled to view it.3

1Department of Electronic Engineering, De Lin Institute of Technology, Tucheng, Taiwan 236, R.O.C.
2Department of Electrical Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
3Department of Information Management, Cardinal Tien College of Healthcare & Management, Taipei, Taiwan 231, R.O.C.


 

Received: January 22, 2008
Accepted: July 3, 2009
Publication Date: September 1, 2010

Download Citation: ||https://doi.org/10.6180/jase.2010.13.3.08  


ABSTRACT


We consider the inverse problem of determining both the shape and the conductivity of a two-dimensional periodic conducting scatterer from knowledge of the 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 imaging problem is reformulated into an optimization problem. The 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 has been obtained.


Keywords: Periodic Conducting Scatterer, Inverse Problem, Genetic Algorithm


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