低RCS飞行器表面弱散射源研究

飞行器表面不同宽度缝隙、不同高度台阶、不同结构形式对缝（主要包括横向对缝、锯齿对缝两种）等弱散射源对前方雷达截面（RCS）有着比较重要的影响，为了说明控制弱散射源的重要性，介绍了常规飞行器表面结构的缝隙、台阶等弱散射源的分布情况及特点，采用理论方法分析了缝隙的雷达后向散射强度，设计了低RCS载体和实验模型，开展了不同宽度缝隙、不同高度台阶、不同结构形式对缝的RCS实验。结果表明：减小缝隙宽度、台阶高度，采用锯齿缝隙代替直缝隙等方法，是控制隐身飞行器表面电磁缺陷的有效技术途径。

Research on the RCS of weak scatterers on Stealth Vehicle

To get known the influence on the Radar Cross Section (RCS) of front sector which is arisen by weak scatterers such as gaps of different width, stair heights and structure types including straight gaps and zigzag gaps, and to emphasize the importance of decreasing weak scatterers, the distributing status and characteristics of weak scattering sources like surface gaps and steps on the conventional vehicle are introduced. The radar backscatter strength of the gap is theoretically analyzed. The low RCS carrier and RCS testing models are designed, on which certain RCS experiments of gaps with different width, stair heights and architectures are carried on. The test results indicate that in order to control the surface electromagnetic defects (SEMD) of stealthy vehicles, it should take some measures such as reducing gap width and step height, replacing straight gaps by zigzag gaps, etc, which are proved to be high-effective ways in technology.