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电大尺寸开口腔体的RCS计算和控制

张鹏飞;龚书喜;徐云学;刘英
  

  1. (西安电子科技大学 天线与微波技术重点实验室,陕西 西安 710071)
  • 收稿日期:2007-12-22 修回日期:1900-01-01 出版日期:2009-02-20 发布日期:2009-02-10
  • 通讯作者: 张鹏飞

Computation and control of RCS for large open-ended cavities

ZHANG Peng-fei;GONG Shu-xi;XU Yun-xue;LIU Ying
  

  1. (Key Lab. of Antennas and Microwave Technology, Xidian Univ., Xi’an 710071, China)
  • Received:2007-12-22 Revised:1900-01-01 Online:2009-02-20 Published:2009-02-10
  • Contact: ZHANG Peng-fei

摘要: 通过对涂敷吸波材料的理想导体表面阻抗边界条件和反射系数的在薄涂层和大角度入射时的近似,结合物理光学近似得到了处理涂敷吸波材料腔体的物理光学迭代(IPO)公式.在此基础上采用初值继承算法和前后向迭代结合的快速IPO方法计算了采用S弯和在腔体内壁涂敷吸波材料对腔体雷达截面(RCS)的减缩效果.计算结果显示结合这两种方法可对电大尺寸开口腔体的后向RCS达到20dB的减缩作用.

关键词: 电大尺寸开口腔体, 物理光学迭代, 雷达截面

Abstract: The Iterative Physical Optics (IPO) iterative equation is deduced by combining the asymptotic principle of physical optics with the approximations of the surface impedance and reflective coefficient of the PEC surface coated with a thin absorber layer for a large incident angle. The Radar Cross Section (RCS) of an S-shaped circular wave guide and that coated with absorber layer on the inner wall are computed by the fast Iterative Physical Optics method using algorithms of initial value succession and Forward-Backward Iterative. The results show that the absorbent lining and S-shaping of the cavities can lead to 20-dB reduction of RCS for large open-ended cavities.

Key words: large open-ended cavities, iterative physical optics, radar cross section

中图分类号: 

  • O441
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