Influence Of Shell Structure And Material On Receiving Characteristics Of Electric Field Probes

As the electric field probes are more widely used in the electromagnetic environment monitoring,they tend to have smaller appearance size,flatter frequency response,wider measurement frequency band,larger linear area,and better spatial omnidirectional trend.The development of the electric field probe shell design is also more challenging.The shell is an indispensable part of the electric field probe.It mainly protects the electric field probe so that it can withstand a certain degree of mechanical s hock and possible extreme environments.At the same time,it must also ensure that its influence on the broadband characteristics of the electric field probe is as small as possible.Therefore,it is of great theoretical significance and practical value to study the influence of the shell structure and material on the receiving characteristics of the electric field probe.The main work of this article is as follows:First of all,in order to improve the performance index of the electric field probe shell,and to design the electric field probe shell,the CST(Computer Simulation Technology)is used to establish the ideal electric field probe receiving model,and the attenuation frequency characteristics of PC(Polycarbonate)?PLA(Polylactic Acid)?PTFE(Polytetrafluoroethylene)three shell materials is simulated.Then the actual electric field probe receiving model is established in this thesis,and the characteristics of electric field probe receiving frequency under the conditions of PC,PLA and P TFE shell materials are simulated.Results show that the PTFE shell material has the least influence on the frequency flatness,and the PLA shell material has a relatively large influence on the frequency flatness.Secondly,a cylindrical,spherical shell electric field probe receiving model was built in this thesis by CST simulation software,and then the frequency flatness influence factors of the two shell shapes were been simulated and analyzed.Next,the frequency flatness impact factors of the two cases are measured in this thesis.The simulation and measured results show that the spherical shell has the least influence on the frequency flatness.Finally,based on the above results,this thesis chooses the PTFE spherical shell which has the least influence on the frequency flatness as the shell,and establishes the optimized electric field probe receiving model.In this thesis,the properties of the electric field probe are improved by filling the material inside the shell and optimizing the size of the dielectric substrate.The simulation results show that the optimized shell has less influence on frequency flatness and better isotropic response.The factors affecting the frequency flatness of the optimized shell were measured.