一种均匀共形天线阵列的测向方法

A Direction of Arrival Method for Uniform Conformal Antenna Array

共形天线对入射信号的极化信息比较敏感,传统空间谱估计等测向过程中会出现较大误差,甚至失效。文章对共形天线的反辐射探测系统测向技术进行了研究,针对共形天线排列的均匀圆阵模型提出了一种相位匹配测向方法。该方法可以实现目标信号的二维测向,可以得到识别信号的极化特征,并可以大概率地避免大角度测向时由于多路径、信号折射、绕射等情况下产生的干扰,成功地对目标信号进行测向及跟踪。

The conformal antennas are sensitive to the polarization information of the received signal,the traditional spatial spectrum algorithm used for direction of arrival(DOA)estimation may cause large errors even failures.To solve the problem above,the angle estimation technology of the anti-radiation detection for conformal antennas is studied,and a DOA estimation method based on phase matching technology is proposed for the uniform circular array(UCA)with conformal antennas.This method can realize the two-dimensional DOA estimation and obtain the polarization characteristics of the target.What’s more,this method can avoid the interference with high probability,which generated by the multipath,signal refraction,diffraction,etc.And it can estimate DOA and track the target signal successfully during large angel measurement.