介质涂覆目标与粗糙面后向复合散射特性研究.doc

文档介绍：
介质涂覆目标与粗糙面后向复合散射特性
研究#
柴水荣,郭立新,王蕊*
5
10
(西安电子科技大学物理与光电工程学院,西安 710071)
摘要:本文提出了一种快速计算介质涂覆目标与粗糙面后向复合电磁散射特性的混合方
法,该混合方法基于互易性原理和物理光学法(PO)。在本文中,为避免由于人为截断而在粗
糙面两端引起的人工反射,我们采用 Thorsos 在 1988 年提出的锥形波为入射波。为验证本
问提出的混合方法的有效性,分别用本文提出的混合方法和传统矩量法(MoM)对粗糙面与其
上方导体目标后向雷达散射截面进行仿真,发现二者具有很高的吻合度,这说明了本混合方
法的正确性。最后,本文讨论了目标介质涂覆层参数对复合散射雷达散射系数的影响。
关键词:复合电磁散射;介质涂覆目标;互易性原理
中图分类号:TN011
15
ic Backscattering From an Arbitrary
Dielectric-coated Conducting Target Located above a
Randomly Rough Surface
Chai Shuirong, Guo Lixin, Wang Rui
20
25
30
35
40
(School of Physics and Optoelectronic Engineering, Xidian University, Xi'an,China 710071)
Abstract: This study proposes and validates a new hybrid method to calculate the
ic (EM) backscattering from a dielectric-coated conducting target located above a
randomly rough surface. The method is based on reciprocity theorem and physical optics (PO). To
avoid the artificial reflection from two endpoints of rough surface, the tapered plane wave proposed by
Thorsos in 1988 is introduced as the incident wave. The results obtained from our method show a good
agreement with the numerical results derived from the conventional method of moments (MOM) in a
special case of a perfectly electric conducting (PEC) target located above a dielectric rough surface.
This verifies the accuracy of the method proposed in this study. Finally, the influenc