随机Gauss粗糙面上三维导体目标散射差场的随机泛函解析计算方法

丁锐; 金亚秋

doi:10.7498/aps.60.124102

摘要

提出一种解析的随机泛函方法(SFA),计算导体Gauss粗糙面上三维导体目标的复合电磁散射.推导粗糙面的随机Green函数,用一种新的四路径模型描述面体复合散射机理,用SFA求解双站差场雷达散射截面.以导体球目标为算例,与其他数值计算方法比较后验证了SFA的有效性与准确性,同时讨论了粗糙度、体目标尺寸以及距离粗糙面高度等参量变化对结果的影响,给出复杂形状体目标的双站差场雷达散射截面的空间角分布.

关键词:

A stochastic functional approach (SFA) is developed to calculate electromagnetic composite scattering from a three-dimensional perfectly electric conducting (PEC) target on a randomly rough PEC surface. The stochastic Green's function for randomly rough surface is derived, and a novel four-path model is presented to describe the scattering mechanism of target-surface interactions. The SFA is used to obtain the difference scattering cross section due to the rough surface of target. As a simple example of a spherical target with rough surface, the SFA is numerically compared with other numerical approaches, showing its accuracy and effectiveness. Finally, the difference bistatic scattering from a complex electric large target with rough surface and its functional dependence on the parameters are discussed.

Keywords:

stochastic functional approach /
stochastic Green's function of rough surface /
difference radar cross section /
composite scattering of target/surface

作者及机构信息

丁锐,
金亚秋

1.
复旦大学波散射与遥感信息教育部重点实验室,上海 200433

基金项目: 国家自然科学基金(批准号:60971091, 40637033)和复旦大学研究生创新基金资助的课题.

Authors and contacts

1.
Key Laboratory of Wave Scattering and Remote Sensing Information of Ministry of Education, Fudan University, Shanghai 200433, China

参考文献

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施引文献

[1]	Jin Y Q, Liu P, Ye H X 2008 Theory and Method of Numerical Simulation of Composite Scattering From the Object and Randomly Rough Surface (Beijing: Science Press) pp35,66,106-108,121 (in Chinese) [金亚秋、刘鹏、叶红霞 2008 随机粗糙面与目标复合散射数值模拟理论与方法 (北京:科学出版社)第35, 66, 106-108, 121页]
[2]	Li Z X, Jin Y Q 2001 Acta Phys. Sin. 50 797 (in Chinese) [李中新、金亚秋 2001 物理学报 50 797]
[3]
[4]
[5]	Li Z X, Jin Y Q 2002 Acta Phys. Sin. 51 1403 (in Chinese) [李中新、金亚秋 2002 物理学报 51 1403]
[6]	Liu P, Jin Y Q 2004 IEEE Trans. Geosci. Remote Sens. 42 950
[7]
[8]
[9]	Li L, He J Q, Liu Z J, Carin L 2003 IEEE Trans. Antennas Propag. 51 810
[10]
[11]	Xu F, Jin Y Q 2009 IEEE Trans. Antennas Propag. 57 1495
[12]
[13]	Ye H X, Jin Y Q 2008 Acta Phys. Sin. 57 839 (in Chinese) [叶红霞、金亚秋 2008 物理学报 57 839]
[14]
[15]	Ye H X, Jin Y Q 2009 Acta Phys. Sin. 58 4579 (in Chinese) [叶红霞、金亚秋 2009 物理学报 58 4579]
[16]	Guan B, Zhang J F, Zhou X Y, Cui T J 2009 IEEE Trans. Geosci. Remote Sens. 47 3399
[17]
[18]	Wang R, Guo L X, Ma J, Wu Z S 2009 Chin. Phys. B 18 1503
[19]
[20]	Li Z M, Hao Y, Zhang J C, Xu S R, Ni J Y, Zhou X W 2009 Chin. Phys. B 18 5072
[21]
[22]
[23]	Xie T, He C, William P, Kuang H L, Zou G H, Chen W 2010 Chin. Phys. B 19 024101
[24]
[25]	Li J, Guo L X, Zeng H, Han X 2009 Chin. Phys. B 18 2757
[26]
[27]	Li J B, Wang X S, Wang T 2009 Chin. Phys. B 18 3174
[28]	Chiu T, Sarabandi K 1999 IEEE Trans. Antennas Propag. 47 902
[29]
[30]	Ogura H 1975 Phys. Rev. A 11 942
[31]
[32]	Ogura H, Takahashi N 1985 J. Opt. Soc. Am. A 2 2208
[33]
[34]	Ding R, Jin Y Q, Ogura H 2010 Acta Phys. Sin. 59 3674 (in Chinese) [丁锐、金亚秋、小仓久直 2010 物理学报 59 3674]
[35]
[36]
[37]	Nakayama J, Ogura H, Sakata M 1981 J. Math. Phys. 22 471
[38]
[39]	Ishimaru A, Rockway J D, Kuga Y 2000 Waves Rand. Compl. Med. 10 17
[40]	Ishimaru A 1978 Wave Propagation and Scattering in Random Media (New York: Academic) p389
[41]
[42]
[43]	Johnson J T 2002 IEEE Trans. Antennas Propag. 50 1361
[44]	Jin Y Q 1994 Electromagnetic Scattering Modeling for Quantitative Remote Sensing (Singapore: World Scientific) p43
[45]
[46]
[47]	Johnson J T 2001 Microwave Opt. Techn. Lett. 30 130
[48]	Nakayama J 1982 Radio Sci. 17 558
[49]

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