为了突破传统的低频天线通信设备成本高昂、体系结构庞大、功率消耗过高等局限,实现具有“尺寸小,重量轻,功耗低”等特点的天线发射系统,提出了低频机械天线,即利用永磁铁或永电体材料作特定的机械运动来产生甚低频电磁辐射。文中引用电偶极子的辐射电场的结果推导出了旋转偶极子辐射场的表达式,从坡印廷定理出发分析旋转偶极子的近场和远场的辐射特性,并利用CST 数值仿真的方法验证了理论分析的正确性。根据旋转磁偶极子辐射场的辐射特性提出了永磁体作为辐射单元以特定的机械运动产生电磁辐射来实现低频机械天线的方式。低频机械天线的实现对未来对潜通信、导航等领域具有一定影响。

In order to break through the limitations of traditional low-frequency antenna,such as high cost communication equipment, large system structure and high power consumption, and realize antenna transmission system with “small size, light weight, low power consumption”, a low-frequency mechanical antenna is proposed, that is magnet or permanent electric material for specific mechanical motion to produce very low frequency electromagnetic radiation. In this paper, the expression of the rotating dipole radiation field is derived by quoting the expression of the radiated electric field of the electric dipole, and analyse the radiation characteristics of the near and far fields of the rotating dipole from the Poynting theorem, and the correctness of the theoretical analysis was verified by numerical simulation. According to the radiation characteristics of the rotating magnetic dipole radiation field, the way in which the permanent magnet acts as a radiating element to generate electromagnetic radiation with specific mechanical motion to realize the low frequency mechanical antenna is proposed. The low frequency mechanical antenna has certain influence on the future of submarine communication and navigation.

TN820. 2

中央高校基本科研业务费项目资助( NO. CCNU18GF005;NO. CCNUJCXK02)