双通道脉间变频外场RCS测试雷达的研究

Research on Two-Channels Pulse to Pulse Frequency Shifting Outdoor RCS Measurement Radar

该文研究了双通道脉间变频外场RCS测试雷达的设计方法,提出了一种波形设计和系统实现的途径。分析了目标像的失真与频率的数值关系。根据双通道雷达可以同时在2个频段上进行测试的特点,提出了一种根据测试数据推算目标径向速度的方法,从而能够进一步校正被测目标速度对成像的影响。使用该方法对外场实测数据进行了处理,处理后的目标像幅度有所提高,主瓣变窄,从而分辨率得到了提高。

Design of two-channels high-range-resolution pulse to pulse frequency shifting RCS outdoor measurement radar is researched. A waveform design and a system realization method are presented. The numerical relationship between range-profile＇s distortion and frequency is analyzed. A method to calculate the target＇s radial velocity by the measurement results is discussed based on the architecture that the radar can measure the target on two different frequency band at the same time. The target＇s radial velocity effect on range profile can be corrected. The method is used to process the real outdoor measured data. The amplitude of the target＇s imaging is boosted and the major lobe of the target＇s imaging become narrower after being corrected.