瞬态电磁场传感器的校准方法  

A Calibration Method for High Power Transient Electromagnetic Field Sensor

作　　者：姜云升 孟萃[1,2] 吴平 徐志谦 JIANG Yun-sheng;MENG Cui;WU Ping;XU Zhi-qian(Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle&Radiation Imaging,Ministry of Education,Beijing 100084,China)

机构地区：[1]清华大学工程物理系,北京100084 [2]粒子技术与辐射成像教育部重点实验室,北京100084

出　　处：《现代应用物理》2019年第4期51-54,共4页Modern Applied Physics

摘　　要：选取TEM小室和镜面单锥TEM小室作为瞬态电磁场传感器的校准装置,利用TEM小室在较低的频率范围内电磁场均匀且易于计算的特点,将其用于校准传感器的幅度灵敏度。由于镜面单锥TEM小室具有很高的上限频率,将其用于校准传感器的带宽。给出了校准过程中对传感器尺寸及位置的具体要求,描述了幅度灵敏度校准中校准系数的计算方法和带宽校准中传感器频带上限的计算方法。In this paper,a transverse electromagnetic(TEM)cell and a mono-cone TEM cell are selected as calibration devices for transient electromagnetic field sensor.The TEM cell is used to calibrate the sensor’s amplitude sensitivity because of its uniform electromagnetic field and easy calculation in a lower frequency range.The mono-cone TEM cell is used to calibrate the bandwidth of the sensor because of its high upper frequency.The specific requirements of sensor,such as diameter or length,position,are given during calibration.The calculation method of calibration coefficient in amplitude sensitivity calibration and the determination method of the upper frequency limit of a sensor in bandwidth calibration are also described.

关 键 词：瞬态电磁场 校准方法 幅度灵敏度校准 带宽校准 TEM小室 镜面单锥TEM小室 

分 类 号：O441.5[理学—电磁学]