基于傅立叶变换频移特性的平面近场测试方法  

Planar Near Field Measurement Method Based on Frequency Shift Characteristics of Fourier Transform

作　　者：杨顺平[1] YANG Shun-ping(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《微波学报》2023年第2期84-87,共4页Journal of Microwaves

摘　　要：为了满足快速和无相测试现场天线的需求,文中提出了一种基于傅立叶变换频移特性的平面近场测试方法。该方法采用多探头技术,利用各个通道的移相,达到天线角域的移动,实现了任意指向角信号的采集,具有测试快速、使用便捷的特点,特别适用于天线的大规模生产测试和现场测试等。对一个标准喇叭天线进行了平面近场扫描测量,对比了用传统近场数据处理插值方式得到的和用频移性质得到的天线远场方向图(E面)。实验显示,该方法具有与传统近场测试方法相同的效果,能有效地测试天线方向图。A planar near-field test method based on the frequency shift characteristics of Fourier transform is proposed to meet the requirements of fast and phase-free test of field antenna.This method adopts multi probe technology and uses the phase shift of each channel to achieve the movement of antenna angle domain and realize the acquisition of arbitrary pointing angle signal.This paper performs the planar near-field scanning measurement on a standard horn antenna.Experiments show that this method has the same effect as the traditional near-field test method,and can effectively test the antenna pattern.This method has the characteristics of fast test and convenient use.It is especially suitable for large-scale production test and field test of antenna.

关 键 词：傅立叶变换 平面近场测试 天线测试 频移特性 

分 类 号：TN821.8[电子电信—信息与通信工程]