摘要
在天线方向图测试中,紧缩场测试(CATR)是远场测试的一种有效替代手段,但多径效应的存在,会显著影响紧缩场测试的精确度。本文提出一种能在紧缩场测试中有效消除多径效应的方法。该方法把待测天线(AUT)沿任意特定方向等距移动,进行多次测量,不同位置测得的多径信号会有不同的相移因子,利用这些相移因子构造一范德蒙特矩阵,对该范德蒙特矩阵直接求逆,可得到被测单元对所有信号的响应输出,其中,零度方向的响应输出即为待测单元的方向图。仿真及测试数据偏差均小于0.5 dB,表明该方法可以对多径效应进行有效的消除。
Compact Antenna Test Range(CATR) is an effective alternative method to measure the antenna pattern, however, the existence of the stray signals would significantly degrade the measurement accuracy. The paper proposes an effective method which can effectively eliminate the influence of the stray signals. The proposed method measures the Antenna Under Test(AUT) repeatedly while moving the AUT along any straight line with equidistance. There are different phase factors for each stray signal at different displacements. A Vandermonde matrix can be constructed by using these phase factors. All responses, including the desired response, can be calculated by inverting the Vandermonde matrix. The deviations between the simulations and test data are less than 0.5 dB, which validates the effectiveness of the proposed method.
作者
樊勇
何子远
雷世文
杨世伟
FAN Yong;HE Ziyuan;LEI Shiwen;YANG Shiwei(Electronic Information Division,Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu Sichuan 610073,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2020年第4期660-664,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
中央高校基本科研业务费基金资助项目(ZYGX2018J021)。
关键词
紧缩场测试
多径信号
等距移动
范德蒙特矩阵
Compact Antenna Test Range
stray signal
equal displacement
Vandermonde matrix
