一种新型近距宽带调频连续波雷达的实现方法

A new short-range wideband FMCW radar implementation

提出一种中心频率为3 GHz单天线近距宽带调频连续波雷达的实现方法,设计了射频单元和中频信号处理电路.采用槽形结构的微带天线并利用微带威尔金森功分器取代传统的环行器双工结构,实现了雷达的宽带应用;通过Blackman加窗的方法对差拍信号进行FFT处理,抑制了天线端口的反射以及发射泄露信号的影响.实验结果表明,该新型近距调频连续波雷达方案是可行的.

This paper presented an implementation method of single antenna short range wideband FMCW radar with mi-crostrip structure, and the radar worked at 3 GHz.Microstrip Wilkinson power dividers were adopted to replace the tradi-tional circulator duplex structure , and a wideband microstrip slot antenna was designed .Blackman window was applied into the frequency beat signal so as to decrease the effect of direct reflection and crosstalk .Experimental results show that the proposed method is feasible .