基于旋转永磁体的机械天线研究  

Research on mechanical antenna based on rotating permanent magnet

作　　者：刘文一 张锋 孙发晓 Liu Wenyi;Zhang Feng;Sun Faxiao(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Key Laboratory of Electromagnetic Radiation and Sensing Technology,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]电磁辐射与探测技术重点实验室,北京100190 [3]中国科学院大学,北京100190

出　　处：《电子测量技术》2021年第5期143-148,共6页Electronic Measurement Technology

摘　　要：为了克服现有低频通信系统的发射天线尺寸庞大、功耗大、辐射效率低等缺陷,提出了一种小型化、低功耗低频发射天线。该低频发射天线利用伺服交流电机驱动永磁体旋转产生超低频电磁波,上位机通过运动控制器编程软件设定伺服电机运动参数,并下发给控制器,实时控制电机运动,将二进制频移键控(2FSK)空间调制技术应用于该机械天线,从而进行信息传输。实验结果表明,该机械天线可以20.35 cm^(3)的永磁体辐射源、44 W的低功耗实现码速率为1 bit/s的超低频通信。与传统低频发射天线相比,该机械天线尺寸小,功耗低,辐射效率不受Chu-Harrington极限限制,为超低频通信系统提供了一种新的发射天线。In order to overcome the large size, high power consumption and low radiation efficiency of the transmitting antenna in the existing low-frequency communication system, a miniaturized and low-power low-frequency transmitting antenna is proposed. The low frequency transmitting antenna uses servo AC motor to drive the permanent magnet to rotate to generate ultra-low frequency electromagnetic wave. The upper computer sets the motion parameters of the servo motor through the programming software of motion controller, and sends them to the controller to control the motor motion in real time. The spatial modulation technology of 2 FSK is applied to the mechanical antenna for information transmission. The experimental results show that the mechanical antenna can achieve 1 bit/s ultra-low frequency communication with a 20.35 cm^(3) radiation source of permanent magnet and a low power consumption of 44 W. Compared with traditional low-frequency transmitting antennas, the mechanical antenna is small in size, low in power consumption, and radiation efficiency is not limited by the Chu-Harrington limit, providing a new technical proposal for transmitting antenna of ultra-low frequency communication systems.

关 键 词：机械天线 超低频通信 小型化 低功耗化 2FSK调制解调 

分 类 号：TN98[电子电信—信息与通信工程]