| 旋转永磁式机械天线的研究与实现 |
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| 引用本文： | 周强,施伟,刘斌,魏志虎,何攀峰,张江.旋转永磁式机械天线的研究与实现[J].国防科技大学学报,2020,42(3):128-136. |
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| 作者姓名： | 周强 施伟 刘斌 魏志虎 何攀峰 张江 |
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| 作者单位： | 国防科技大学 第六十三研究所, 江苏 南京 210007 |
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| 基金项目： | 国家部委基金资助项目(6140518030108)；国防科技大学科研计划重点资助项目(ZK17-02-05) |
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| 摘 要： | 为实现低频电磁发信系统的小型化和低功耗,对基于旋转永磁体的机械天线,即利用永磁体机械旋转直接激励电磁波的新型低频电磁发信技术进行了理论研究与工程实践。提出基于钕铁硼永磁体和永磁同步电机的旋转永磁式机械天线技术方案及其信息加载方法,构建基于电-机械-电磁能量转换的系统模型,对其辐射效率和辐射功率进行初步分析,研究旋转永磁体在不同无限均匀介质中产生时变磁场的分布与衰减特性,研制了原理样机,并对其近区磁场和2FSK信号的加载特性进行了实验测试,验证了该方案的可行性和有效性。
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| 关 键 词： | 低频电磁通信 电小天线 机械天线 旋转磁偶极子 钕铁硼永磁体 永磁同步电机 |
| 收稿时间： | 2018/11/15 0:00:00 |
Research and practice of the mechanical antennas based onrotating permanent magnet |
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| ZHOU Qiang,SHI Wei,LIU Bin,WEI Zhihu,HE Panfeng,ZHANG Jiang.Research and practice of the mechanical antennas based onrotating permanent magnet[J].Journal of National University of Defense Technology,2020,42(3):128-136. |
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| Authors: | ZHOU Qiang SHI Wei LIU Bin WEI Zhihu HE Panfeng ZHANG Jiang |
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| Affiliation: | The Sixty-third Research Institute, National University of Defense Technology, Nanjing 210007, China |
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| Abstract: | In order to realize miniaturization and low power consumption of the LF (low frequency) radio transmitter, a novel LF radio transmitting technology called as RMBMA (rotating-magnet based mechanical antenna), which is based on mechanical rotating of permanent magnet to induce electromagnetic fields, was researched theoretically and practiced in engineering. A technology scheme of RMBMA based on NdFeB magnet and permanent magnet synchronous motor, and an information loading method were presented. With electric-mechanic-electromagnetic energy conversion, a system model of RMBMA was developed to analyze the radiation efficiency and radiation power. Meanwhile, in different infinite uniform medium, the distribution and attenuation characteristics of time-varying magnetic field generated by a rotating permanent magnet were studied. Finally, by developing a prototype, the near magnetic field characteristics and 2FSK signal loading characteristics were experimentally tested, and the feasibility and effectiveness of the proposed scheme were verified. |
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| Keywords: | low frequency electromagnetic communication electrically small antenna mechanical antenna rotating magnetic dipoles NdFeB magnet permanent magnet synchronous motor |
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