前向散射雷达目标回波特性实验

Experimental study on target echo characteristics for forward scattering radar

摘要:

前向散射雷达是一种双基地角接近180°的特殊体制双基地雷达，它通过捕获目标穿越基线时引起的回波起伏变化实现目标的检测，因此对前向散射雷达目标回波特性的研究至关重要。以暗室实测的前向散射雷达回波数据为基础，分析了球体、二面角、三面角、圆柱体雷达目标前向散射场与辐射场相干叠加的综合效应，得出雷达目标进入前向散射区，回波幅度先减小后小幅反弹的规律。该文可以增进对前向散射雷达目标回波特性的认知，为目标检测与识别提供支撑。

Abstract:

Forward scattering radar is a particular bistatic radar scheme with the bistatic angle approaching 180°. According to the total field variation, the forward scattering radar can detect the target when targets pass through the baseline. Therefore, the research on echo characteristics of forward-scattering radar is of great significance. The effects of coherent superposition of scattering and radiation fields are analyzed based on the measurement data of metallic sphere, dihedral, trihedral, and cylinder radar targets in an anechoic chamber. It is summarized that when the radar target enters the forward scattering zone, the echo amplitude decreases firstly, and then rebounds slightly. This work helps to improve the knowledges about forward-scattering radar echo characteristics, and provides supports for the target detection and recognition technologies.