| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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An Inverse Electromagnetic Scattering Method for One-Dimensional Inhomogeneous Media |
| LIN Zhi-Wei**, XU Xin, ZHANG Xiao-Juan, FANG Guang-You
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Key Laboratory for Electromagnetic Radiation and Detection Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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LIN Zhi-Wei, XU Xin, ZHANG Xiao-Juan et al 2011 Chin. Phys. Lett. 28 014101 |
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Abstract A frequency-domain inversion scheme for reconstructing the permittivity profile of one-dimensional inhomogeneous media is proposed. The generalized reflection coefficients and the generalized transmission coefficients of the inhomogeneous media are used as the input data of the inverse model. A Newton-like iterative algorithm known as the generalized pulse-spectrum technique with the Tikhonov regularization is applied to solve the inverse problem. Novel boundary conditions are proposed for the inverse problem and therefore the permittivity at the boundary of the inhomogeneous media is not required as prior knowledge. The choice of frequency points of the frequency-domain method is also investigated. Numerical examples are carried out to validate the inversion technique. Good agreements between the reconstructed profiles and the true profiles are shown.
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| Keywords:
41.20.Jb
42.25.Dd
42.25.Fx
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Received: 08 October 2010
Published: 23 December 2010
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.25.Dd
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(Wave propagation in random media)
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42.25.Fx
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(Diffraction and scattering)
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