高频地波雷达天线阵雷达散射截面的预估

Pre-estimating Array RCS of HF Ground Wave Radar

针对机载和弹载雷达工作的频段,基于距量法和多端口网络原理,推导出OSMAR2000系统天线阵雷达散射截面(RCS)的预估方法.采用相对相位叠加的高频近似方法,处理天线阵高频区散射的计算,大幅减少了计算量.预估结果表明:该天线阵的雷达散射截面具有较强的方向性,峰值主要集中在近地和垂直方位;入射雷达波频率越高,天线阵RCS方向性越强,空间分布的平均值越低;入射波垂直入射角越大,RCS空间分布的平均值也越低.

Based on method of moment and multi-port network, the radar cross section (RCS) of OSMAR2000 “Ten-five” antenna array is pre-estimated over working band of airborne radar and missile radar. The amount of calculation is greatly decreased over high frequency zones by using high-frequency approximation method. Numerical results demonstrate that the RCS has a lot to do with the incident angle and frequency. All peaks of RCS exist in spaces that are near ground and vertical angle. The mean of RCS becomes lower when incident frequency or vertical angle become greater.