Design of A Three dimensional Wideband Sensor for LEMP Electric Field Measurements
Three dimensional wideband electric field sensor is one of key instruments for lightning electromagnetic pulse (LEMP) measurements. Its performance can influences the precision of measurement directly. A small size three dimensional wideband sensor for pulsed electric field measurements is described in this paper, which is simple structure and is convenient for engineering application. Three direction components of total fields of LEMP can be measured in the same time by using three dimensional antenna and optical transmitter, The three dimensional antenna can convert fields to induced voltages, and the optical transmitter can transform the electricity signal to photic signal. In order to validate the antenna’s configuration, FDTD is used to simulate the electromagnetic characteristic by changing the size of square antenna board and the distance between antenna board and inner conducted cube. Antenna coupling with interelectrode and its frequency spectrum performance are also analyzed. According to the calculation, the 3dB bandwidth range can over DC to 750MHz. The measurement dynamic range of peak value of pulsed electric field is from several Volt per meter to hundreds of thousands Volt per meter. The calculated results provide important reference for actual antenna design. Based on the results of simulation ，a noval three dimensional wideband electric field sensor has been developed. The results of measurement show that wide frequency response of this sensor satisfies the requirement of LEMP field measurements. The nanosecond pulsed signals can be measured efficiently. The sensor has been successfully applied in a LEMP measurement system.
Xu Yuanzhe Gao Cheng Shi Lihua Li Yanxin Zhou Bihua
Nanjing engineering institute,Nanjing, 210007 ,China
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）