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自积分式电容分压器的频率响应特性

卫兵 龚伯仪 王治 卿燕玲 袁建强 丰树平

卫兵, 龚伯仪, 王治, 等. 自积分式电容分压器的频率响应特性[J]. 强激光与粒子束, 2018, 30: 045006. doi: 10.11884/HPLPB201830.170369
引用本文: 卫兵, 龚伯仪, 王治, 等. 自积分式电容分压器的频率响应特性[J]. 强激光与粒子束, 2018, 30: 045006. doi: 10.11884/HPLPB201830.170369
Wei Bing, Gong Boyi, Wang Zhi, et al. Frequency response characteristics of self-integralting capacitive divider[J]. High Power Laser and Particle Beams, 2018, 30: 045006. doi: 10.11884/HPLPB201830.170369
Citation: Wei Bing, Gong Boyi, Wang Zhi, et al. Frequency response characteristics of self-integralting capacitive divider[J]. High Power Laser and Particle Beams, 2018, 30: 045006. doi: 10.11884/HPLPB201830.170369

自积分式电容分压器的频率响应特性

doi: 10.11884/HPLPB201830.170369
基金项目: 

国家自然科学基金项目 11605181

国家自然科学基金项目 11605188

详细信息
    作者简介:

    卫兵(1973—),男,高工,从事脉冲功率装置电参数测试技术研究;73wb@163.com

  • 中图分类号: TM835.4

Frequency response characteristics of self-integralting capacitive divider

  • 摘要: 为了测量电缆中传输的ns量级脉冲高电压,设计了自积分电容分压器并开展了频率响应特性分析。为分压器设计了不同的补偿电阻,并使用含有杂散参数的等效电路进行分析。仿真结果表明:分压器低频特性的主要影响因素是等效取样电阻与低压臂电容乘积得到的时间常数;高频特性主要受电容的杂散电感和取样电阻的杂散电容影响。增大时间常数扩展低频特性时,会导致杂散参数的影响加剧而使分压器高频特性变差。采用方波实验和扫频测量两种方法实测了不同参数分压器的频响特性。结果表明:补偿电阻为550 Ω的电容分压器频响上限超过2 GHz;但是低频特性不足,频率下限约为1.8 MHz;而补偿电阻为6.6 kΩ,且调整结构的电容分压器带宽为0.17~700 MHz,能够满足测试需求。
  • 图  1  电容分压器电路示意图

    Figure  1.  Circuit schematic of capacitive divider

    图  2  电容分压器结构示意图

    Figure  2.  Structure schematic of capacitive divider

    图  3  电阻补偿的电容分压器等效电路

    Figure  3.  Equivalent circuit of resistor-compensated capacitive divider

    图  4  电阻补偿的电容分压器仿真结果

    Figure  4.  Simulated frequency response characteristic of resistor-compensated capacitive divider

    图  5  包含杂散参数的电容分压器等效电路

    Figure  5.  Equivalent circuit of capacitive divider with stray parameters

    图  6  包含分布参数的电容分压器仿真结果

    Figure  6.  Simulated frequency response characteristics of capacitive divider with stray parameters

    图  7  分压器方波响应测试示意图

    Figure  7.  Schematic diagram of experiment with square pulse generator

    图  8  电容分压器方波响应波形

    Figure  8.  Square-wave response waveforms of capacitive divider

    图  9  电容分压器的扫频测试结果

    Figure  9.  Frequency response characteristics from capacitive divider experiment

    图  10  改进的电阻补偿的电容分压器等效电路

    Figure  10.  Equivalent circuit of improved capacitive divider with stray parameter

    图  11  电容分压器频响特性的仿真与实验结果

    Figure  11.  Simulated and experimentally measured frequency response characteristics of capacitive divider

    表  1  电容分压器杂散参数取值表

    Table  1.   Stray parameters of capacitive divider

    No LR/nH Cg/pF
    1 20 8
    2 20 16.5
    3 20 30
    4 100 16.5
    5 2000 16.5
    下载: 导出CSV

    表  2  补偿电阻的设计参数

    Table  2.   Parameters of compensated resistor

    No R1/kΩ number of resistor in series/ps
    1# 9 1
    2# 6.6 2
    3# 6 3
    4# 0.55 1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-09-11
  • 修回日期:  2017-11-21
  • 刊出日期:  2018-04-15

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