航空学报 > 2008, Vol. 29 Issue (3): 675-680

飞行器表面缝隙电磁散射特性研究

黄沛霖,刘战合   

  1. 北京航空航天大学 航空科学与工程学院
  • 收稿日期:2007-11-23 修回日期:2008-01-19 出版日期:2008-05-20 发布日期:2008-05-20
  • 通讯作者: 黄沛霖

Research on Electromagnetic Scattering Characteristics of Slits on Aircraft

Huang Peilin,Liu Zhanhe   

  1. School of Aeronautic Science and Engineering, Beijing University of  Aeronautics and Astronautics
  • Received:2007-11-23 Revised:2008-01-19 Online:2008-05-20 Published:2008-05-20
  • Contact:

    Huang Peilin

摘要:

在常规飞行器的各类电磁散射源中,缝隙属于弱散射源,但对于隐身飞行器,缝隙电磁散射不可忽略。为研究飞行器缝隙电磁散射特性,在不同极化下,将缝隙置于金属平板的对角线,削弱金属边缘电磁散射影响。通过系列雷达散射截面(RCS)测试分析,得到了缝隙电磁散射随缝隙宽度、(多缝隙)缝隙间距的变化规律,以及其极化特性。不同宽度单缝测试结果表明:对于水平极化,缝隙宽度小于波长的1/4时,缝隙的宽度增加将导致缝隙引起的表面波散射快速增长,反之,呈下降趋势;对于垂直极化,缝隙宽度较小时试件的电磁散射与无缝金属平板接近,当缝隙宽度大于波长的1/2时,宽度增加时,其散射增强。多缝隙测试结果表明缝隙间距会影响散射的空间分布、波峰位置,可以理解为对各单缝隙散射叠加效果的影响。垂直极化影响强于水平极化。

关键词: 飞行器, 隐身, 电磁散射

Abstract:

Slits are feeble sources among the various electromagnetic scattering sources on a traditional aircraft. But for the stealth military aircraft, scattering contribution of slits is remarkable since the main sources are heavily reduced. To analyze the scattering characteristics of slits at different polarizations, a slit was placed in the diagonal of a metal plate to weaken the influence of metal edges and the diagonal was placed from vertical to horizontal.

Key words: aircraft,  , stealth,  , electromagnetic , scattering

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