旋转永磁式机械低频天线的系统设计与验证

为实现低频电磁发信系统的小型化和低功耗，面向旋转永磁式机械天线的理论研究和技术实践，提出了基于多物理场耦合仿真的系统设计和性能校验方法。设计了包含永磁磁源、高效驱动电机及其控制器在内的旋转永磁式机械天线系统方案。研制了实验样机，并对其系统性能和近区磁场进行了实验测试，验证了相关设计方法和系统方案的可行性与有效性。结果表明，该样机的磁场场强和尺寸等主要指标达到了美国“机械天线”项目在射频穿透技术领域的要求，为旋转永磁式机械天线方案研究和样机设计提供了一种可行思路。

System design and verification of rotating-magnet based mechanical low-frequency antenna

In order to achieve the miniaturization and low power consumption of the low-frequency electromagnetic transmitter, a system design and performance verification method based on multi-physics coupling simulation was proposed for the theoretical research and technical practice of RMBMA(rotating-magnet based mechanical antennas). A RMBMA system scheme including a permanent magnet source, a high-efficiency drive motor and its controller was designed. By developing an experimental prototype, the system performance and near magnetic field characteristics were tested experimentally, and the feasibility and effectiveness of the proposed design method and system scheme were verified. Results show that the main indexes of the prototype, such as magnetic field intensity and size, meet the requirements of the penetrating radio frequency technical area in the AMEBA(a mechanically based antenna) project of the United States, which provides a feasible idea for the scheme research and prototype design of RMBMA.