The Simulation Of The Optimal Electromagnetic Parameter Area And Experimental Modification To The Absorbent Material

With the rapid development of information technology,a large number of electronic equipment is widely used.At the same time,it will produce a large number of electromagnetic radiation,which seriously aff ect people's normal life.Therefore,the absorption of material research has a very important practical significance.The use of absorbing materials can not only reduce the harm of electromagnetic waves on human beings,but also in terms of weapons and equ ipment can make up for stealth problems.Because of the factors that affect the microwave absorbing properties of absorbing materials,many difficulties need to be overcome in the research process,and the traditional methods and experiments have been unab le to meet the growing scientific research needs.Therefore,the application of computer-aided research can reduce the blindness of the experiment,save costs and improve the efficiency of the study.In this paper,the ideal method of electromagnetic f ield is studied by introducing the transmission line theory method,and the simulation results are verified by preparing PANI / Fe₃O₄ nanocomposites.Based on the theory of transmission line,the ideal electromagnetic parameters of the complex permittivity under given conditions are obtained according to the theory of transmission line.The absorbing performance of the absorbing agent in different frequency bands is predicted and the absorbing agent is found Direction.?d?,frequency?f?,reflectivity?R?and other factors on the ideal electromagnetic parameters of the region.PANI hollow microspheres with average particle size of about 800 nm were prepared by hard template method,and their electromagnetic parameters were measured by vector network analyzer.The results of the test and the simulation results were analyzed to find the direction of improving the electrical parameters of the electrical loss PANI to improve its absorption performance.?d?,frequency?f?,reflectance?R?and other factors on the ideal electromagnetic parameters of the region.The influence of the thickness?d?,the frequency?f?and the reflectance?R?on the ideal electromagnetic parameter region is obtained.The results show that the pure PANI has high electrical loss and low magnetic loss,the degree of electromagnetic matching is poor,the absorbing performance is not ideal.The dielectric loss of the composites decreases and the magnetic loss increases with the Fe₃O₄ on the surface of the hollow structure PANI,so that t he dielectric loss tangent?the dielectric loss tangent?is increased by the simulation results and the experimental data?tan???and magnetic loss tangent?tan???,and the experimental results are in good agreement with the simulation results.