基于物理光学假设的导体表面电流密度误差分析

姬金祖; 马云鹏; 黄沛霖; 张中建

基于物理光学假设的导体表面电流密度误差分析

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 总装备部武器装备预先研究项目

详细信息

中图分类号: V218
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出版历程
- 收稿日期: 2012-05-27
- 修回日期: 2012-11-26
- 网络出版日期: 2013-05-31

Error analysis of surface current density on perfect electric conductor based on physical optics

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 用物理光学法计算理想导体雷达散射截面过程中,需要基于无限大切平面假设计算表面电流密度.只有对表面比较光滑的电大尺寸目标,该假设才近似满足,而在一般情况下由该方法求得的表面电流密度存在误差.将二维导体圆柱、方柱以及三角柱等构型在不同入射频率、极化下的物理光学表面电流密度与精确解或矩量法结果进行了对比.分析表明:横磁波照射时物理光学法除在顶点处有较大误差外,基本能够正确反映出表面电流密度分布情况.横电波情形下物理光学法难以如实反映照射面和阴影面电流的谐振变化,与入射方向平行的面上表面电流密度也有较大误差.
- 物理光学法 /
- 表面电流 /
- 精确解 /
- 矩量法
Abstract: In radar cross section (RCS) calculation of perfect electric conductor (PEC) targets using physical optics (PO), the surface current was calculated based on the assumption of infinite tangent plane. The assumption was fulfilled only for the electric-big and smooth-surface targets, while there is error induced by PO in general situation. The PO's surface current of two-dimensional profiles such as cylinder, square prism and triangular prism was calculated and compared with accurate or method of moments (MoM) result. The analysis shows that when transverse magnetic (TM) wave is incident on the target, PO reflects the true situation except for some vertices. However, when transverse electric (TE) wave is incident on the target, PO cannot show the resonant oscillation in illuminated and shadowed surfaces and there are still big errors in the surface current parallel to the incident direction.
- physical optics(PO) /
- surface current /
- accurate solution /
- method of moments(MoM)

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参考文献(14)

[1]	姬金祖,刘战合.基于面元分组的电磁遮挡算法及其优化[J].北京航空航天大学学报,2009,35(4):453-456 Ji Jinzu,Liu Zhanhe.Electromagnetic occultation algorithm based on facets grouping and optimization[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(4):453-456(in Chinese)
[2]	Mohajer M,Safavi-Naeini S,Chaudhuri S K.Surface current source reconstruction for given radiated electromagnetic fields[J].IEEE Transactions on Antennas and Propagation,2010,58(2):432-439
[3]	何国瑜,卢才成,洪家才,等.电磁散射的计算和测量[M].北京:北京航空航天大学出版社,2006:196-204 He Guoyu,Lu Caicheng,Hong Jiacai,et al.Calculation and measurement of electromagnetic scattering[M].Beijing:Beihang University Press,2006:196-204(in Chinese)
[4]	关莹,龚书喜,徐云学,等.适用于裁剪NURBS曲面RCS预估的改进的物理光学法[J].西安电子科技大学学报,2010,37(5):893-898 Guan Ying,Gong Shuxi,Xu Yunxue,et al.Improved PO technique for the RCS computation of targets modeled with trimmed NURBS surfaces[J].Journal of Xidian University,2010,37(5):893-898(in Chinese)
[5]	陈博韬,雷振亚,谢拥军,等.基于改进物理光学法的电大目标双站RCS的预估[J].电波科学学报,2010,25(5):960-965 Chen Botao,Lei Zhenya,Xie Yongjun,et al.Bistatic RCS prediction with improved PO method for electrically large targets[J].Chinese Journal of Radio Science,2010,25(5):960-965(in Chinese)
[6]	关莹,龚书喜,张帅,等.时域物理光学法分析均匀介质目标的瞬态散射[J].电波科学学报,2011,26(3):515-520 Guan Ying,Gong Shuxi,Zhang Shuai,et al.Transient scattering analysis of electrically large homogeneous dielectric targets by using TDPO method[J].Chinese Journal of Radio Science,2011,26(3):515-520(in Chinese)
[7]	Li Jianbing,Wang Xuesong,Qu Longhai.Calculation of physical optics integrals over NURBS surface using a delaminating quadrature method[J].IEEE Transactions on Antennas and Propagation,2012,60(5):2388-2397
[8]	Jackson J A.Analytic physical optics solution for bistatic 3D scattering from a dihedral corner reflector[J].IEEE Transactions on Antennas and Propagation,2012,60(3):1486-1495
[9]	Letrou C,Boag A.Generalized multilevel physical optics (MLPO) for comprehensive analysis of reflector antennas[J].IEEE Transactions on Antennas and Propagation,2012,60(2):1182-1186
[10]	Liu Ziliang,Wang Chaofu.Efficient iterative method of moments physical optics hybrid technique for electrically large objects[J].IEEE Transactions on Antennas and Propagation,2012,60(7):3520-3525
[11]	Zhang Jun,Yu Wenming,Zhou Xiaoyang,et al.Efficient evaluation of the physical optics integrals for conducting surfaces using the uniform stationary phase method[J].IEEE Transactions on Antennas and Propagation,2012,60(5):2398-2408
[12]	Huang K,He Z L,Zhang H W,et al.Efficient analysis of antenna around electrically large platform with improved non-uniform rational b-spline hybrid method of moments and physical-optics method[J].IET Microwaves Antennas and Propagation,2011,5(2):136-141
[13]	Tasic M S,Kolundzija B M.Efficient analysis of large scatterers by physical optics driven method of moments[J].IEEE Transactions on Antennas and Propagation,2011,59(8):2905-2915
[14]	Umul Y Z.Physical optics scattering of waves by a half-plane with different face impedances[J].IEEE Antennas and Wireless Propagation Letters,2011,10:21-24