Research And Design Of Miniaturized Antenna Based On Acoustic Resonance

With the continuous development of communication technology,many applications such as the Internet of Things,biomedicine,wearable monitoring,5G and so on require their devices to have higher performance and smaller physical size.As an important part of these systems,the performance of the antenna directly affects the overall performance of the system,and its size continues to develop in the direction of miniaturization.However,due to the limitation of the traditional electromagnetic radiation principle,the size of the miniaturized antenna is still in the order of wavelength,which cannot meet the actual needs.Therefore,the miniaturized design of antennas has become a research hptspot and difficulty in the field of antennas.In order to break through the problem of miniaturization of antenna design,this thesis explores the new principle of electromagnetic radiation caused by mechanical wave charge movement,and studies the design problem of new miniaturized antenna based on the new principle.The main work and innovations of this thesis are:1.In-depth analysis of the limitations of traditional antenna miniaturization technology,led to a new method of mechanical wave induced charge movement of the antenna miniaturization,pointed out its broad development prospects.2.As a new concept of miniaturized antennas,there is still a lack of perfect analysis theory.This thesis discusses in detail the working principle of miniaturized antennas based on acoustic resonance,and comprehensively discusses the selection of basic antenna structures based on material characteristics and antenna design requirements.3.In this thesis,a design scheme of a miniaturized antenna based on acoustic resonance is proposed,and related structural simulation analysis is carried out.Based on the design requirements and engineering application prospects,the selection of relevant materials was carried out;the working process of the miniaturized antenna was explained in conjunction with mathematical formulas,and the one-dimensional structure simulation was performed using the finite-difference time-domain(FDTD)algorithm to verify and analyze the theory of the antenna structure Feasibility;Then,the finite element simulation software was used to analyze and optimize the acoustic structure of the miniaturized antenna based on acoustic resonance,and its frequency and structural response were solved,and the working mechanism of the new antenna was verified.4.In view of the fact that there is no mature simulation method that can realize the three-dimensional modeling and simulation of the miniaturized antenna based on acoustic resonance,this thesis uses the custom PDE function of commercial finite element simulation software COMSOL Multiphysics to conduct mathematical modeling,and develops a mutual interaction including magnetic field,electric field and stress field.The coupled finite element model can solve and derive the near field value of the electromagnetic radiation of the miniaturized antenna based on acoustic resonance.Then,using the principle of surface equivalence,the near-far field conversion is carried out,and the far-field radiation performance of the antenna is solved.Finally,the electromagnetic radiation characteristic analysis of the miniaturized antenna based on acoustic resonance is realized,and the feasibility of the new miniaturized antenna scheme was verified.