天线时域平面近场测量系统的研究

Research of Antenna Planar Near-Field Measurement System in Time-Domain

时域近场测量作为一种新发展起来的天线测量技术,具有和通常的频域测量不同的独特优势,它能得到天线的时域特性和宽带特性。首先介绍了时域平面近场测量系统的构成,为了能对雷达进行测量,系统采用了使用矢量信号源模拟产生复杂雷达信号的方案,并对标准增益喇叭进行了验证测试,把测试结果和理论仿真、频域近场测试结果进行了比对,证实了时域平面近场测量测试系统的实用性。

Time domain near field measurement is a new antenna measurement technology,it have the particularly advantage compare to the frequency domain measurement,and it can get the time domain characteristic and wide band characteristic of antenna.This paper presents the composition of the time domain planar near field measurement system,and the system adopts the radar emitter simulation using vector signal generator.Finally it had demonstration measurement for the standard gain horn,and compare the time domain planar near field measurement results with the simulation and the frequency domain near field measurement results,the results show the validity of the measurement system.