纳秒高压脉冲电阻分压器的结构优化

由电阻分压器和存储示波器组成的纳秒级高电压脉冲测量系统中,各组成部分间的阻抗匹配与否,对测量结果影响很大.笔者基于高频电磁场仿真软件FEKO,建立了电阻分压器的仿真模型,分析了其结构对测量结果的影响,并比较了4种典型结构的优劣,对选中的结构进行了过渡段的选型和锥角优化.仿真结果表明,为减小反射,分压器应采取过渡结构,且...

Structure Optimization of Resistance Divider for Measuring Nanosecond High Voltage Pulse

In a system with resistance voltage divider for measuring nanosecond high voltage pulse,its impedance matching between the divider and else elements influences measuring result much.The simulation model was built based on simulation soft FEKO.Analysis results indicate it would cause reflection,oscillating and changing of the voltage divider ratio when the system impedance mismatch,and the structure of a divider is very important in order to get ideal response performance.Four different typical structures of a resistor divider were analyzed.The results show that conical transition structure is better.The cone angle of input transition section influences the response rising time much,while the cone angle of output transition section influences distortion level of the response fall portion.Optimization shows that the best angle of input transition cone is 20°,and bigger cone angle of output transition can be adopt according to measuring demand.A small voltage divider was designed and developed based on the result of simulation.The experiments show that the conclusion of simulation is proper.The divider performance can satisfy actual demand for measuring nanosecond high voltage pulse.