Electromagnetic Pulse Coupling Analysis Of Satellite Module Based On TDSBR

With the continuous evolution in modern warfare,the satellite communication systems play a decisive role in the war as a hub connecting the front and rear commands of war.How to predict the impact of electromagnetic pulse on the satellite effectively is very important when designing the satellite.In the past,the Time-Domain Finite Difference(FDTD)method was often used to predict the influence of electromagnetic pulses on the satellite.However,this method faces the problems of big time-consuming and high computer requirements while the satellite cabin is the super-large size target.In this paper,an algorithm based on Time-Domain Shooting Bouncing Rays(TDSBR)method is proposed and optimized.It is more efficient than the FDTD method in the electromagnetic pulse coupling analysis of satellite.This article mainly did the following works:Firstly,according to the traditional SBR method which is often applied to far-field scattering calculation,in this paper this theory is extended to the near-field calculation,and the spatial positional relationship between the ray tube path and the observing-points is innovatively transformed into the spatial positional relationship between the point and hexahedron.With this method,the near-field problem can be successfully calculated by using the frequency domain SBR method.Secondly,aiming at the deficiency of frequency domain SBR method in analyzing the response of target time domain,this algorithm is extended to time domain analysis,and the formula of near-field time domain response of target is deduced by using TDSBR method,then the algorithm is programmed and compared with commercial simulation software,and proves the feasibility and efficiency of the algorithm.Thirdly,two optimization methods are proposed to solve the problem of the defficiency of TDSBR method.Aiming at the problem that the traditional TDSBR method is big time-consuming when dealing with complex targets,based on kd-tree acceleration structure,an accelerated structure named kd-heap is proposed,which is more suitable for parallel computing in GPU than kd-tree structure.Besides,when a super-electric large-sized target is processed at a high frequency,it is necessary for the TDSBR method to generate a large number of ray tubes,resulting in inefficiency.To solve this problem,GPU parallel computing is used for acceleration.Then the two optimization methods are programmed and compared with the traditional TDSBR to prove the effectiveness of the optimization method.Finally,this paper analyzes the electromagnetic pulse coupling of the satellite with different angles of incidences or different polarizations.We also analyzes the electromagnetic pulse coupling of the satellite having different shape openings.This paper will provide effective simulation data and suggestions for the overall design and electromagnetic protection of the satellite.