射频前端强电磁脉冲前门耦合研究

摘要

针对强电磁脉冲能量经天线进入射频前端的威胁,给出强电磁脉冲环境的评估方法,通过分析天线-射频前端工作原理,提出全频带脉冲耦合能量的理论计算公式.并以中馈天线-短波电台为例,用电磁仿真软件CST实现了天线仿真与前端电路仿真的有机连接,得出前门耦合数据及其影响因素,此仿真方案也为更深入分析耦合效应、验证防护技术提供了良好平台.最后根据仿真为前门防护提出若干意见.%Aiming at the serious threat of high power EMP energy by coupling into RF front-end through antenna,an assessment method of high power EMP environment is presented.Then the theoretical formula of full-band coupling energy is deduced after analyzing coupling mechanism of antenna connected with RF front-end.Taking center-fed antenna connected with shortwave radio as an example,software compute simulation technology (CST) is adopted to achieve the valid association between antenna simulation and circuit simulation and obtain the coupling data and the factors affecting front-door coupling.The simulation program provides an effective platform for further analysis of the coupling effect and validation of protection technology.Finally,some views about front-door protection are proposed.