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2004-06-22

Electromagnetic Imaging for an Imperfectly Conducting Cylinder Buried in a Three-Layer Structure by the Genetic Algorithm

By Yu-Shu Lee, Chien-Ching Chiu, and Yi-Shiuan Lin
Progress In Electromagnetics Research, Vol. 48, 27-44, 2004
doi:10.2528/PIER03120304

Abstract

The imaging of an imperfectly conducting cylinder buried in a three-layer structure by the genetic algorithm is investigated. An imperfectly conducting cylinder of unknown shape and conductivity buriedin the secondla yer scatters the incident wave from the first layer or the thirdla yer. We measure the scatteredfieldin the first andthird layers. Based on the boundary condition and the recorded scattered field, a set of nonlinear integral equations is derived and the imaging problem is reformulatedin to an optimization problem. The genetic algorithm is then employedto findout the global extreme solution of the cost function. Numerical results demonstrated that, even when the initial guess is far away from the exact one, goodreconstruction can be obtained. In such a case, the gradient-based methods often get trapped in a local extreme. In addition, the effect of uniform noise on the reconstruction is investigated.

Citation


Yu-Shu Lee, Chien-Ching Chiu, and Yi-Shiuan Lin, "Electromagnetic Imaging for an Imperfectly Conducting Cylinder Buried in a Three-Layer Structure by the Genetic Algorithm," Progress In Electromagnetics Research, Vol. 48, 27-44, 2004.
doi:10.2528/PIER03120304
http://jpier.org/PIER/pier.php?paper=0312034

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