基于时频分析的电磁脉冲耦合效应研究  

Research of EMP Coupling Effects Based on Time-Frequency Analysis

作　　者：王冠凌[1] 

机构地区：[1]安徽工程大学电气工程学院,芜湖241000

出　　处：《微波学报》2014年第6期59-63,共5页Journal of Microwaves

基　　金：国家自然科学基金(51275001);安徽高校省级自然科学研究重点项目(KJ2013A042)

摘　　要：为了解高功率电磁脉冲对电子系统的干扰与毁伤影响,利用基于Wigner-Ville分布的时频分析方法对耦合进电子系统内部的电磁信号进行了特征分析。与单独的时域分析和频域分析相比,时频分析不仅能够得到信号的时域特征和频域特征,还能同时得到信号各频率分量随时间的变化情况。利用瞬态极化时频分析,进一步得到信号极化状态在时频域的分布。仿真结果表明,时频分析得到的结果更全面详细,可以根据时频分析得到的信号特征更加准确地指导电子系统的高功率电磁脉冲防护加固。In order to understand the interference and damage effects on electronic equipments from high power electromagnetic pulse,the aperture coupling effects of rectangular cavity under different polarized electromagnetic pulse irradiation were numerically studied,using the time-domain finite integration method( FIT). This paper analyzed the aperture coupling effects when electromagnetic pulse was linear,circular and elliptical polarized respectively. Results show that elliptical and circular polarized waves are coupled into the cavity more easily. The signal at the center of the cavity was observed.Then method of joint time-frequency analysis was used to obtain Wigner-Ville distribution. Based on that,the instantaneous polarization of electromagnetic wave was introduced,and the instantaneous polarization Wigner-Ville distribution of the signal was obtained.

关 键 词：电磁脉冲 时频分析 瞬态极化 WIGNER-VILLE分布 

分 类 号：TM15[电气工程—电工理论与新技术]