复杂强电磁环境下系统辐射敏感度测试方法

Introduction on Measurement of System Radiated Susceptibility under Complex Electromagnetic Environment

系统地介绍了复杂强电磁辐射环境下系统级装备辐射敏感度测试的开阔场辐照法、低电场扫描法、混响室和模拟器法。分析了每种方法的原理、特点及适用范围:开阔场辐照法实现的技术难度较小,但对硬件要求高且容易受到外界环境场干扰;低电场扫描法技术上容易实现,对硬件要求低,但需要获取辐射场与线束电流的递推关系;(混响室可以用较小的功放产生较强的电磁场;)模拟器法可以产生场强极高的辐射环境,且具有试验空间大,场均匀性好等优点,高压脉冲源的研制、辐射天线的设计是该方法需要解决的关键技术。

Four radiated susceptibility testing methods on system-level equipment under complex electromagnetic environment were introduced systematically, namely irradiation in open area test sites （OATS）, low electric field sweep, reverberation chamber and simulator. The fundamentals, features as well as applicable areas of the aforementioned methods were analyzed. The implementation of irradiation in OATS has lower demands for technology, but higher demands for hardware, and it＇s easy to be interfered by the external environment. The method of low electric field sweep is easy to be implemented in technology with low demands for hardware, but the recurrence relation between radiated field and bundle current needed to be obtained. The method by using a simulator can make a radiated environment with extreme high field strength, which has such advantages as wide test space and good field uniformity. However, the development of high-voltage pulse source and the design of transmitting antenna are the critical technological problems needed to solve for this method.