相控阵天线栅瓣效应与规避

相控阵天线由许多阵元排列组成。根据不同的阵元间距和波长的关系,给出了栅瓣出现的位置。搭建了一个试验平台,通过控制扫描角度可以看到栅瓣出现的位置。采用相控阵天线技术结合传统天伺系统的方法,可以扩大天线的扫描范围,并且起到了规避栅瓣的作用。简述了多波束形成过程,论述了阵列天线的空间功率合成,并仿真出天线多波束方向图的理论值,与实验得到的结果相吻合。对工程起到指导作用。

Grating Lobe Effect of Phased Array Antenna and Its Avoidance

A phased array antenna consists of a number of elements. Based on the the relationship between array element spacing and wavelength, the locations of grating lobe are provided. With a test platform established, the location of grating lobe can be seen by adjusting the scanning angle. The use of phased array antenna technology combined with traditional antenna servo system is able to expand the scanning range of the antenna, and plays a role in avoiding grating lobe. This paper outlines the formation of multi-beam, discusses the spatial power combining of array antenna, and simulates the theoretical values of a multi-beam antenna pattern, which has consistency with the experimental results and provides guidance for engineering.