摘要
对于紧缩场毫米波/红外复合目标结构,反射面的边缘绕射作用会造成毫米波场波面的畸变,影响工作区的场均匀性,从而产生测角误差。为了提高测角精度,提出锯齿和卷曲2种反射面边缘处理方法。通过复合目标建模和数值计算分析,得到紧缩场反射面边缘处理后的测角精度,频段为35 GHz时平面测角精度在0.032°以内。结果表明:通过压制边缘绕射,改善了场均匀性,提高了目标的测角精度。
Affected by the offset reflector in compact millimeter wave/infrared（MMW/IR） composite target,the wave front of MMW will be distorted and cause angular error. In order to enhance the angular accuracy,two kinds of reflector edge processing method were given. Through the modeling of compound target and numerical calculation,the accuracy of angle measurement processed by the reflector edge can be limited to 0. 032° in 35 GHz. The results show that the edge processing can well oppress the edge diffraction and enhance the uniformity of MMW field.
出处
《系统仿真技术》
2017年第4期271-276,共6页
System Simulation Technology
关键词
紧缩场毫米波
偏馈反射面
边缘处理
测角精度
compact range millimeter wave （MMW）
offset reflector
edge processing
accuracy of angle measurement
