摘要
基于相位噪音和相控阵理论,运用线阵天线原始方向图函数和光纤链路噪音系数公式,根据天线波束指向实际误差进行合理近似,推导了光延迟线链路噪音系数、天线阵元数与波束指向误差的理论公式.采用常规光纤链路参量进行了仿真研究,结果表明:相控阵天线波束指向误差均方差随光纤链路噪音系数增大而增加,随天线阵元数增加而减小,指向误差与光纤延迟线链路噪音系数的1/2次方成正比,与阵元数的3/2次方成反比.在相控阵天线工作频段内,低频波段受噪音系数影响更加明显.
Based on phase noise and phased array antenna theory,using original linear array antenna pattern function and optical fiber link noise figure function,the theoretical formulas that describe relationship between the figure in optical fiber delay line links noise,the number of antenna elements and beam pointing error were derived by reasonable approximation according to actually beam pointing error. The normal optical fiber link parameters were applied to the simulation.The results demonstrated that mean square deviation of phased array antenna beam pointing error increases with the increasing of optical fiber link noise figure and decreases with the increasing of elements number of the array,the phased array antenna beam pointing error is in proportion to 1/2power of optical fiber delay line links noise figure,in inverse proportion to 3/2 power of number of array elements.In phased array antenna operating frequency bands,it is more obvious impact of optical fiber delay line links noise in low frequency band.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2014年第4期29-33,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.61271030)
中央高校科研基本业务费(No.E022050205)资助
关键词
光纤通信
相控阵天线
波束形成
波束指向
相位噪音
光链路
光收发模块
Optical fiber communication
Phased array antenna
beamforming
Beam pointing
Phase noise
Optical links
Optical transceivers
