航空学报 > 2009, Vol. 30 Issue (12): 2322-2327

表面不连续特征双站散射特性的试验研究

刘战合1, 黄沛霖1, 高旭2

  

  1. 1.北京航空航天大学 航空科学与工程学院 2.中国航空工业集团公司 第一飞机设计研究院
  • 收稿日期:2008-10-30 修回日期:2009-05-15 出版日期:2009-12-25 发布日期:2009-12-25
  • 通讯作者: 刘战合

Experimental Research on Bistatic Scattering Characteristics ofSurface Discontinuous Character

Liu Zhanhe1, Huang Peilin1, Gao Xu2

  

  1. 1. School of Aeronautics Science and Engineering, Beijing University of aeronautics and Astronautics 2. The First Aircraft Institute, Aviation Industry Corporation of China
  • Received:2008-10-30 Revised:2009-05-15 Online:2009-12-25 Published:2009-12-25
  • Contact: Liu Zhanhe

摘要:

采用一种新颖的不连续特征双站雷达散射截面(RCS)测试方法,通过系列化测试,研究了单直缝隙板、单直台阶板的双站散射特性,提出了不连续特征双站散射具有相似性、对称性和平移性的特点,分析了不同不连续特征具有的异同点。试验结果表明:对不连续特征,不同双站下的RCS散射曲线均具有和对应入射频率下的单站散射曲线分布形式相似的特点,同时不同的不连续特征对幅值的影响不同;如果测试方式和试验件对称,则双站和单站散射曲线均具有关于峰值所在方位角对称的特点,单直缝隙板由于试验件本身的对称性表现为较好的曲线对称性,而单直台阶板则表现为稍弱的对称性;散射曲线随双站角的增大,具有明显的平移特性,平移的幅度为双站角的1/2,平移方向为从发射天线指向接收天线,平移后的曲线峰值处于发射天线和接收天线夹角平分线上。

关键词: 电磁散射, 缝隙, 台阶, 双站, 雷达散射截面

Abstract: The bistatic and multi-azimuth scattering characteristics of single-straight-gap and single-straight-step plates are studied by a series of radar cross section (RCS) testing which is based on a novel experimental method for the bistatic RCS of surface discontinuous characters. For the bistatic RCS curves of surface discontinuous characters, such characteristics as resemblance, symmetry and translation are presented and the rules of different surface discontinuous characters are analyzed. The results show that different bistatic angle RCS curves are similar to the corresponding monostatic RCS curves, and that different surface discontinuous characters have different influences on RCS magnitude. If the testing method and plates are symmetrical, then bistatic and monostatic RCS are symmetrical with regard to curve peak azimuth, while the RCS curve symmetry of a gap plate is better than that of a step plate because of the gap plate symmetry. Bistatic curves are translated more obviously with the increase of bistatic angle and the translation magnitude is half that of the bistatic angle. The translated direction is pointing to the receiver antennas from the transmitter antennas. The peak of RCS curves is located on the centerline of the angle between the transmitter and receiver antennas.

Key words: electromagnetic scattering, gap, step, bistatic, radar cross section

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