Inverse Scattering of Two-Dimensional Homogeneous Dielectric Object by G.A.

• Main Authors: Yi-Da Wu, 吳義達
• Other Authors: Chien-Ching Chiu
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/07137571112741065111

碩士 === 淡江大學 === 電機工程學系 === 90 === In this dissertation, a powerful optimal algorithm for solving the inverse scattering problem of a two-dimensional homogeneous dielectric object is investigated. Both the lossless media and lossy media cases are taken into account. Dielectric cylinders of unknown permittivities are existed in free-space. For the homogeneous object, the moment method and genetic algorithm are used to solve a set of one-dimensional linear integral equations. Then both the shape and the dielectric constant are successfully reconstructed. They also show that the permittivity of the cylinders can be successfully reconstructed even when the permittivity is fairly large. The algorithm can be applied with several incident waves at a single frequency. Good reconstruction is obtained even in the presence of additive random noise in measured data. In addition, the effect of random noise on imaging reconstruction is also numerically investigated.