Electromagnetic Imaging of Inhomogeneous Biaxial Dielectric Cylinders Coated on a Conductor Buried in a Slab Medium

• Main Authors: Shin Hung Lin, 林信宏
• Other Authors: Chien-Ching Chiu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/21170004361974392457

碩士 === 淡江大學 === 電機工程學系碩士班 === 95 === The inverse scattering of buried inhomogeneous biaxial dielectric cylinders is investigated. Dielectric cylinders of unknown permittivities are buried in a slab scatters a group of unrelated incident waves from outside. The scattered field is recorded outside the slab. By proper arrangement of the various unrelated incident fields, the difficulties of ill-posedness and nonlinearity are circumvented, and the permittivity distribution can be reconstructed through simple matrix operations. The algorithm is based on the moment method and the unrelated illumination method. Numerical results show that satisfactory reconstruction has been obtained. Good reconstruction is obtained even in the presence of additive Gaussian random noise in measured data. In addition, the effect of noise on the reconstruction result is also investigated.