Research On Mechanism And Modulation Method Of Mechanically Based Antenna Operating At Super Low Frequencies

In the wireless communication system,the super low frequency(SLF)electromagneic wave has strong anti-interference ability and good penetration.It can penetrate seawater and rock and soil,and is mainly used in geological exploration and earthquake prediction.It is mainly used in military exploration and underwater communication.At present,ultra-low frequency wireless communication is mostly used as a transmitting antenna by laying an electric adjustable antenna of the order of 100 meters or even kilometers,and the radiation efficiency is low.The mechanical antenna scheme replaces the alternating electric signal driving mode of the conventional antenna by driving the permanent magnet or electret mechanical motion,and adopts a new working system to improve the low-infrared radiation efficiency of the super low frequency signal.In this paper,the radiation mechanism of mechanical antenna is studied firstly,the basic working principle of mechanical antenna is antalyzed,the analytical formula of electromagnetic radiation field of mechanical antenna is deduced,the numerical simulation of mechanical antenna is carried out,and the correlation theory is verified by the comparison of analytical and numerical methods.Secondly,it analyzes the problems existing in the application of conventional modulation methods to mechanical antennas,and proposes a polarization modulation method suitable for mechanical antennas.It is verified by theoretical analysis and numerical simulation that it is applied to mechanical antennas.Feasibility;Finally,based on the theoretical and simulation results of the mechanical antenna and its modulation method,the prototype of the super low frequency mechanical antenna communication principle is built,and the prototype of the prototype is introduced in detail including the main functions of each component and the entire mechanical antenna system.The design and assembly of the scheme verified the effectiveness of the mechanical antenna related theory and the proposed modulation method.