摘要
针对现有超低频天线发射端单一化缺陷和通信距离受限瓶颈,为实现超低频电磁发信系统的小型化和远距离传输,该文对旋转式永磁体机械天线的超低频电磁发信技术进行了理论创新和工程实践。探究多输入单输出(MISO)场景下超低频多机械天线电磁辐射理论,建立了基于三相感应电机的多机械天线阵列的空间磁场分布模型。仿真结果表明:利用三相感应电机组成的2元机械天线阵列可使磁感应强度在近场提高3 dB。该文还提出了多天线超低频近场最优波束成型技术。仿真结果表明:当天线之间的初始相位相等时径向接收磁场分量场强最大。设计高精度同步技术并搭建原理样机进行测试,实验结果表明:发送端采用2元天线组阵,信号功率提高6 dBm,传输距离可达50 m。
Considering the single defect of the transmitter of the existing mechanical ultra-low frequency antenna and the bottleneck of limited communication distance,In order to realize the miniaturization and longdistance transmission of ultra-low frequency electromagnetic signaling system,the theoretical innovation and engineering practice of low-frequency electromagnetic signaling technology of rotating permanent magnet mechanical antenna are carried out.The electromagnetic radiation theory of ultra-low frequency multi mechanical antenna in Multiple Input Single Output(MISO)scenario is explored,and the spatial magnetic field distribution model of multi mechanical antenna array based on three-phase induction motor is established.The simulation results show that the magnetic induction intensity can be increased by 3 dB in the near field by using the mechanical antenna array composed of three-phase induction motor.The ultra-low frequency nearfield optimal beamforming technology with multiple mechanical antennas is proposed,The simulation results show that when the initial phases between the antennas are equal,the field strength of the radial received magnetic field component is the largest.High precision synchronization is designed and principle prototype is setted up for testing,The experimental results show that the signal power increased by 6 dBm and transmission distance can reach 50 m by using binary antenna array.
作者
马帅
高梦迪
曹世昱
方啸
张冠杰
王洪梅
李世银
MA Shuai;GAO Mengdi;CAO Shiyu;FANG Xiao;ZHANG Guanjie;WANG Hongmei;LI Shiyin(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China;Shaanxi Province Information and Communications Network and Security Laboratory,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2023年第4期1338-1345,共8页
Journal of Electronics & Information Technology
基金
东南大学移动通信国家重点实验室开放研究基金(2021D02)。
