Design And Partial Simulation Verification Of An Emergency Communication Antenna

At present,the space communication system is mainly composed of fixed optical fiber or satellite communication equipment,and is equipped with a small number of vehicle-mounted transportable static communication satellite communication systems.When the fixed communication nodes cannot meet the space communication requirements,the transportable static communication satellite communication system can be used to complete the replacement ahead of schedule.However,in the future space emergency launch and random launch missions,there are many complex scenarios such as unplanned or sudden changes in plans,and the existing networking mode will be difficult to meet the rapid deployment requirements of emergency networking under these scenarios.Therefore,the space communication system urgently needs a communication method that can quickly and stably network under the moving state and can provide higher cross-domain information transmission rate.Satellite Communication System in Motion is a satellite communication system widely used in military,disaster relief and emergency networking.Its main feature is that the communication antenna still has stable,reliable and high-speed communication capability under the environment of high-speed movement.Its flexible and mobile characteristics and broadband characteristics are in good agreement with the emergency networking requirements of space communication systems under future complex scenarios,and are the mainstream research direction of emergency networking communication capacity building.The paper introduces the basic principle and calculation process of satellite communication link calculation and antenna reflection surface shaping.Based on the scientific research project of "Research and Application of High Reliable Emergency Networking Strategy" of space communication system,the technical scheme of satellite communication subsystem in China Mobile is designed,and the system scheme requirement analysis and relevant product design simulation process are given.The main research contents described in this article include the following aspects:1)Demonstration of Satellite Communication Subsystem Scheme for Space Emergency Communication in Motion: Centering on the current situation and future development requirements of space communication system,the overall scheme of spaceemergency communication system is disassembled to demonstrate the application requirements,application scope and application mode of satellite communication subsystem in motion.2)Analysis of communication equipment index requirements: firstly,bring in the equipment working environment,budget constraints and other constraints,and use comprehensive comparison methods to analyze and obtain the platform type,installation height,technical system and other constraints required for satellite communication equipment in motion under the application requirements constraints;Then,combined with the commonly used satellite parameters,limiting geographical coordinates and other restrictions,the installation size of the antenna equipment in mobile communication and the requirements of the electromagnetic characteristics such as gain and efficiency are determined through reflection surface shaping calculation,satellite communication link calculation and other methods.3)Simulation and verification of full wave model of communication in motion antenna: Design the antenna feed system of communication in motion equipment for space emergency communication according to the selection results and index requirements of antenna and feed,and use CST and other simulation software to complete the antenna simulation and index verification.Based on the scientific research project of "Research and Application of Highly Reliable Emergency Networking Strategy",this paper completes the simulation design of Ku/Ka dual-band on-board satellite communication antenna equipment for mobile communication that meets the needs of space emergency communication system construction.The design adopts 0.9m equivalent diameter elliptical shaped reflector antenna and improved ring-loaded corrugated horn.The feasibility of the design is verified by comparing the simulation results with the theoretical analysis results.