中国物理B ›› 2011, Vol. 20 ›› Issue (5): 50201-050201.doi: 10.1088/1674-1056/20/5/050201

• GENERAL •    下一篇

Application of a multiregion model to the EM scattering from a rough surface with or without a target above it

王安琪, 郭立新, 柴草   

  1. School of Science, Xidian University, Xi'an 710071, China
  • 收稿日期:2010-06-17 修回日期:2011-01-17 出版日期:2011-05-15 发布日期:2011-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 60971067), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20100203110016), and the Fundamental Research Funds for the Central Un

Application of a multiregion model to the EM scattering from a rough surface with or without a target above it

Wang An-Qi(王安琪)†, Guo Li-Xin(郭立新), and Chai Cao(柴草)   

  1. School of Science, Xidian University, Xi'an 710071, China
  • Received:2010-06-17 Revised:2011-01-17 Online:2011-05-15 Published:2011-05-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 60971067), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20100203110016), and the Fundamental Research Funds for the Central Universities, China (Grant No. K50510070001).

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摘要： An efficient multiregion model is introduced to calculate the electromagnetic scattering from a perfectly electrical conducting (PEC) rough surface with or without a PEC target above it. In the multiregion model, the rough surface is split into multiple regions depending on their position along the rough surface. Two intermediate regions are chosen as the dominant region. If a target is located above the rough surface, the target will also be included in the dominant region. The method of moments (MOM) is only adopted on the dominant region to ensure validity. Hence, the new model can greatly reduce the number of unknowns associated with full MOM analysis. The induced electric currents on the other regions are obtained by approximately considering the mutual coupling between different regions along the rough surface. Compared with the published hybrid method, this new model is not only suitable for EM scattering from a target above a rough surface but also applicable for just rough surfaces. Several numerical simulations are presented to show the validity and efficiency of the multiregion model.

Abstract: An efficient multiregion model is introduced to calculate the electromagnetic scattering from a perfectly electrical conducting (PEC) rough surface with or without a PEC target above it. In the multiregion model, the rough surface is split into multiple regions depending on their position along the rough surface. Two intermediate regions are chosen as the dominant region. If a target is located above the rough surface, the target will also be included in the dominant region. The method of moments (MOM) is only adopted on the dominant region to ensure validity. Hence, the new model can greatly reduce the number of unknowns associated with full MOM analysis. The induced electric currents on the other regions are obtained by approximately considering the mutual coupling between different regions along the rough surface. Compared with the published hybrid method, this new model is not only suitable for EM scattering from a target above a rough surface but also applicable for just rough surfaces. Several numerical simulations are presented to show the validity and efficiency of the multiregion model.

Key words: multiregion model, electromagnetic scattering, rough surface, method of moments

中图分类号:  (Numerical differentiation and integration)

  • 02.60.Jh
41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 43.30.Hw (Rough interface scattering)