有源相控阵天线近场测试方法研究

Research into Near Field Test Method of Active Phased Array Antenna

天线测试是有源相控阵雷达设计中的重要组成部分,介绍了平面近场测试系统的搭建和测试方法,以及利用平面近场测试系统的口面场进行反演,从而快速测试出有源相控阵雷达天线波瓣的相关性能,实测某Ku天线副瓣电平低于-25dB,扫描指向精度,增益等指标满足设计指标要求,为完成宽带有源相控阵天线的性能测试提供了有效的方法。

Antenna test is an important part of the design of active phased array radar.This paper in troduces the construction and test methods of planar near field test system, and performs the inver sion by using the actinal surface field of planar near field test system, thereby tests the correlation performance of active phased array radar antenna lobe rapidly. The measured side lobe level of a Ku band antenna is lower than- 25 dB, the scanning pointing accuracy, gain and other indexes meet the design requirements, which provides the effective method for the performance test of broadband active phased array antenna.