中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3422-3430.doi: 10.1088/1674-1056/18/8/049

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Electromagnetic scattering from two-layer rough interfaces in the Kirchhoff approximation

王蕊, 郭立新, 麻军   

  1. School of Science, Xidian University, Xi'an 710071, China
  • 收稿日期:2008-05-12 修回日期:2008-11-10 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60571058), and the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20070701010).

Electromagnetic scattering from two-layer rough interfaces in the Kirchhoff approximation

Wang Rui(王蕊)†, Guo Li-Xin(郭立新), and Ma Jun(麻军)   

  1. School of Science, Xidian University, Xi'an 710071, China
  • Received:2008-05-12 Revised:2008-11-10 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60571058), and the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20070701010).

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摘要： Electromagnetic wave scattering from multilayers consisting of two two-layer Gaussian rough surfaces with lossless media is investigated in the Kirchhoff approximation (KA), with consideration of the shadowing effects. The tapered incident wave is introduced into the classic KA, and the bistatic scattering coefficient is redetermined. The advantage of this method is that it is faster in computation than the exact numerical methods. The numerical results show that the bistatic scattering coefficient calculated in the KA is in good agreement with that obtained by using the method of moment (MOM) over a most angular range, which indicates the validity of the KA proposed in our paper. Finally, the effects of the relative permittivity, the root-mean-square (RMS) height, the correlative length, and the average height between the two interfaces on the bistatic scattering coefficient are discussed in detail.

Abstract: Electromagnetic wave scattering from multilayers consisting of two two-layer Gaussian rough surfaces with lossless media is investigated in the Kirchhoff approximation (KA), with consideration of the shadowing effects. The tapered incident wave is introduced into the classic KA, and the bistatic scattering coefficient is redetermined. The advantage of this method is that it is faster in computation than the exact numerical methods. The numerical results show that the bistatic scattering coefficient calculated in the KA is in good agreement with that obtained by using the method of moment (MOM) over a most angular range, which indicates the validity of the KA proposed in our paper. Finally, the effects of the relative permittivity, the root-mean-square (RMS) height, the correlative length, and the average height between the two interfaces on the bistatic scattering coefficient are discussed in detail.

Key words: two-layer Gaussian rough surface, Kirchhoff approximation, tapered wave

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
77.22.Ch (Permittivity (dielectric function)) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 78.68.+m (Optical properties of surfaces)