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.