摘要
根据甚高频天线阵相位测量原理,提出一种利用相位检测芯片AD8302将接收机至传输馈线的两两阵元的定标信源信号的相位差转化为对应的直流电压,再用12 b量化精度单通道A/D采样,最后做误差分析及修正达到修正相位误差的方法。通过验证在低频(2 MHz等)、高频(300 MHz等)等测量条件下,系统给出的电缆相位误差的精度,如在300 MHz信号输入下,电缆之间距离误差达到了cm精度,可以广泛用于相关天线阵误差修正及电缆误差测量中。
According to the phase measuring principle of the very high frequency(VHF)antenna array,a method of using the phase detection chip AD8302to convert the phase difference of the scaling source signal of the two array elements from receiver to transmission feeder line into the corresponding direct voltage.The single channel A/D sampling was realized with12bit quantization accuracy.The error is analyzed and corrected to realize the phase error correction method.The accuracy of the cable phase errorgiven by the system was verified in the measuring conditions of low frequency(2MHz)and high frequency(300MHz).The error accuracy of the distance among cables can reach cm level when the input signal is300MHz.The system can be widely used for related antenna array error correction and cable error measurement.
作者
乐林株
汪敏
董亮
YUE Linzhu;WANG Min;DONG Liang(Yunnan Astronomical Observatory,Chinese Academy of Sciences,Kunming 650011,China;Information Technology United Laboratory,Yunnan University and Yunnan Astronomical Observatories,Kunming 650001,China;School of Information Science and Engineering,Yunnan University,Kunming 650001,China;University of Chinese Academy Sciences,Beijing 100049,China)
出处
《现代电子技术》
北大核心
2017年第9期104-107,共4页
Modern Electronics Technique
基金
国家自然科学基金项目青年基金(11303094)
国家自然科学基金天文联合基金(U1431113)
云南省应用基础研究计划应用基础研究面上项目(2015FB189)
西部之光A类人才计划资助
