EMI测量接收机射频前端响应特性仿真分析  

Simulation of response characteristic of EMI test receiver RF front end

作　　者：谢大刚[1] 侯冬云[1] 宋东安[1] 

机构地区：[1]中国舰船研究设计中心电磁兼容性国防科技重点实验室,湖北武汉430064

出　　处：《舰船科学技术》2010年第1期129-131,137,共4页Ship Science and Technology

基　　金：国防科技重点实验室基金项目(9140C2107010803);国防科技工业技术基础科研项目(H082008A001)

摘　　要：在电磁兼容测试领域中,EMI测量接收机是最常用的基本测试仪器,其射频前端决定了接收机的响应特性,也确定了接收机的总选择性。本文利用Matlab仿真软件对EMI测试接收机射频前端响应特性进行了数值建模,并根据GJB152A对接收机带宽的规定分析了接收机对不同脉冲的包络响应。仿真结果表明,接收机中频带宽决定了包络中可能出现的最高频率及不产生混叠的脉冲最小时间间隔。本文的研究成果可为更好地理解接收机的参数指标以及正确设计、使用接收机提供借鉴,也为后续EMI特性表征方法的研究奠定了基础。EMI test receiver is one of the most commonly used basic testing equipment in the field of EMC testing,the RF front end of which determines not only the response characteristic,but also the overall selectivity of the receiver. Response characteristic of EMI test receiver RF front end was numerically modeled using the computing software Matlab. With the numerical model,the receiver IF envelope response of different pulse was simulated based on the requirement in the military standard GJB 152A. The simulated results show that the IF bandwidth determines the highest frequency occurred in the envelope and the minimum time interval of the pulse that doesn＇t produce aliasing. The research results may provide help for better understanding the performance parameters, designing and operating the receiver, and also have laid a solid foundation for the following research on the representation method of EMI.

关 键 词：EMI 射频前端 响应特性 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TM937.5[自动化与计算机技术—计算机科学与技术]