中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1503-1511.doi: 10.1088/1674-1056/18/4/036

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Hybrid method for investigation of electromagnetic scattering from conducting target above the randomly rough surface

王蕊, 郭立新, 麻军, 吴振森   

  1. School of Science, Xidian University, Xi'an 710071, China
  • 收稿日期:2008-01-09 修回日期:2008-11-10 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60571058), the Specialized Research Fund for the Doctoral Program of Higher Education, China.

Hybrid method for investigation of electromagnetic scattering from conducting target above the randomly rough surface

Wang Rui(王蕊)†, Guo Li-Xin(郭立新), Ma Jun(麻军), and Wu Zhen-Sen(吴振森)   

  1. School of Science, Xidian University, Xi'an 710071, China
  • Received:2008-01-09 Revised:2008-11-10 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60571058), the Specialized Research Fund for the Doctoral Program of Higher Education, China.

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摘要： A current based hybrid method (HM) is proposed which combines the method of moment (MOM) with the Kirchhoff approximation (KA) for the analysis of scattering interaction between a two-dimensional (2D) infinitely long conducting target with arbitrary cross section and a one-dimensional (1D) Gaussian rough surface. The electromagnetic scattering region in the HM is split into KA region and MOM region. The electric field integral equation (EFIE) in MOM region (target) is derived, the computational time of the HM depends mainly on the number of unknowns of the target. The bistatic scattering coefficient for the infinitely long cylinder above the rough surface with Gaussian roughness spectrum is calculated, and the numerical results are compared and verified with those obtained by the conventional MOM, which shows the high efficiency of the HM. Finally, the influence of the size, location of the target, the rms height and correlation length of the rough surface on the bistatic scattering coefficient with different polarizations is discussed in detail.

Abstract: A current based hybrid method (HM) is proposed which combines the method of moment (MOM) with the Kirchhoff approximation (KA) for the analysis of scattering interaction between a two-dimensional (2D) infinitely long conducting target with arbitrary cross section and a one-dimensional (1D) Gaussian rough surface. The electromagnetic scattering region in the HM is split into KA region and MOM region. The electric field integral equation (EFIE) in MOM region (target) is derived, the computational time of the HM depends mainly on the number of unknowns of the target. The bistatic scattering coefficient for the infinitely long cylinder above the rough surface with Gaussian roughness spectrum is calculated, and the numerical results are compared and verified with those obtained by the conventional MOM, which shows the high efficiency of the HM. Finally, the influence of the size, location of the target, the rms height and correlation length of the rough surface on the bistatic scattering coefficient with different polarizations is discussed in detail.

Key words: method of moment, hybrid method, Gaussian rough surface, bistatic scattering

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

  • 41.20.Jb