A Study on Mechanical Antenna Based on Rotating Magnetic Dipole

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.