A Study of Image Reconstruction for Complex Targets Buried in a Slab Medium Using the Unrelated Illumination Method

    Volume 40, Issue 1 (January 2012)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 25 October 2011

    Page Count: 7


    Chiu, Chien-Ching
    Electrical Engineering Dept., Tamkang Univ.,

    Li, Ching-Lieh
    Electrical Engineering Dept., Tamkang Univ.,

    Wu, Chih-Yuan
    Electrical Engineering Dept., Tamkang Univ.,

    Jen Lin, Chun
    Electrical Engineering Dept., Tamkang Univ.,

    (Received 8 February 2011; accepted 13 September 2011)

    Abstract

    This paper investigates the image reconstruction for inhomogeneous dielectric cylinders coated on a conductor with a known cross section buried in a stratified dielectric medium. The buried dielectric cylinder scatters a group of unrelated incident waves illuminated from outside. The scattered field is recorded outside the stratified dielectric medium. By the proper arrangement of a group of unrelated incident fields, the difficulties of ill-posedness and nonlinearity are circumvented, and the permittivity distribution can be reconstructed through simple matrix operations. In the direct scattering part, a set of nonlinear integral equations is deduced mainly based on the boundary conditions. The method of moments is applied to numerically calculate the scattered E field. For the inverse scattering part, the unrelated illumination method is employed to determine the electrical properties of the dielectric cylinder from the measured scattered E fields. The numerical results show that good reconstruction can be obtained both with and without Gaussian noise in measured data.


    Paper ID: JTE103788

    DOI: 10.1520/JTE103788

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    Title A Study of Image Reconstruction for Complex Targets Buried in a Slab Medium Using the Unrelated Illumination Method
    Symposium , 0000-00-00
    Committee E07