The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Iterative Teconstruction of a Cylinder Buried in the Lossy Half Space

손실 반공간에 묻힌 원통형 산란체의 검출 및 영상제구성에 의한 식별

  • 김정석 (한국과학기술원 전자전산학과) ;
  • 나정웅 (한국과학기술원 전자전산학과)
  • Published : 2000.09.01
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Abstract

A cylindrical object buried in the lossy half space is reconstructed from the measured scattered fields above the lossy half space. The position, the size and the medium parameters i.e. relative dielectric constants and conductivity of the buried object as well as the medium parameters of the background lossy half space are obtained from the scattered fields by using the iterative inversion method and the optimization hybrid algorithm combining the genetic algorithm and the Levenberg-Marquardt algorithm. Illposedness of the inversion due to the measurement errors in the scattered fields are regularized by filtering out the evanescent modes in the spatial frequency spectrum domain.

손실 반공간 묻혀 원동형 산란체와 주면 매질의 특성을 반복 기법 최적화 역산란을 적용하여 구했다. 산란파는 경계요소법을 이용하여 계산하였으며 산란체의 크기, 위치 내부매질의 비유전율, 도전율, 주변 매질의 비유전율, 도전율 등의 파라미터는 측정 산란파로부터 유전 알고리즘과 Levenberg-Marquardt 알고리즘의 혼합 알고리즘을 이요하여 역으로 계산하였다. 산란타의 측정오차에 의한 illposedness는 파수 영역에서 자수함수적으로 감쇠하는 감쇠모드를 제거하여 안정하시켰다.

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References

  1. 6th International Conference on Ground Penetrating Radar Imaging of the penetrable object buried in a lossy half space by using the iterative inversion algorithm J. W. Lyu;S. Y. Yang;J. W. Ra
  2. IEEE Tr. Geoscience and Remote Sensing v.Ge-22 no.1 Geophysical diffraction tomography A. J. Devaney
  3. Microw. Opt. Tech. Lett. Reconstruction of a large and high-contrast penetrable object by using the genetic and Levenberg-Marquardt algorithms S. Y. Yang;H. K. Choi;J. W. Ra
  4. Electronics Letters v.24 A spectral inversion technique for reconstruction of complex permittivity profiles Lee, J. M.;S. Y. Kim;J. W. Ra
  5. Radio Sci. no.7 Remote probing of inhomogeneous media using parameter optimization techniques M. Mostafavi;R. Mittra
  6. IEEE Tr. Geosci. and Remote Sensing v.GE-22 Inversion of transient electromagnetic data from a spherical conductor T. J. Lee
  7. Inverse problems 7 Inverse scattering of a buried conducting cylinder C. C. Chiu;Y. W. Kiang
  8. IEEE Tr. MTT v.42 no.8 Microwave Imaging for a dielectric cylinder H. T. Lin;Y. W. Kiang
  9. Micro. and Opt. Tech. Lett. v.21 no.6 Detection and Identification of a tunnel by iterative inversion from cross-borehole CW measurement H. K. Choi;J. W. Ra
  10. IEEE Tr. Microw. Theory and Tech. v.32 no.4 Application of boundary element method to electromagnetic field problems S. Kagami;I. Fukai