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无源积分器的参数测量

卫兵 张元军 康军军 郭帆 徐乐

卫兵, 张元军, 康军军, 等. 无源积分器的参数测量[J]. 强激光与粒子束, 2025, 37: 035019. doi: 10.11884/HPLPB202537.240267
引用本文: 卫兵, 张元军, 康军军, 等. 无源积分器的参数测量[J]. 强激光与粒子束, 2025, 37: 035019. doi: 10.11884/HPLPB202537.240267
Wei Bing, Zhang Yuanjun, Kang Junjun, et al. Parameter measurement of passive integrator[J]. High Power Laser and Particle Beams, 2025, 37: 035019. doi: 10.11884/HPLPB202537.240267
Citation: Wei Bing, Zhang Yuanjun, Kang Junjun, et al. Parameter measurement of passive integrator[J]. High Power Laser and Particle Beams, 2025, 37: 035019. doi: 10.11884/HPLPB202537.240267

无源积分器的参数测量

doi: 10.11884/HPLPB202537.240267
基金项目: 国家自然科学基金项目(12475157)
详细信息
    作者简介:

    卫 兵,73wb@163.com

  • 中图分类号: TM835.4

Parameter measurement of passive integrator

  • 摘要: 为获取无源积分器实际的带宽以及RC时间常数,使用有源高阻探头配合网络分析仪测量了1 MΩ负载条件下积分器的频率特性。仿真计算表明,积分器连接1 MΩ负载时,低频拐点远远低于连接50 Ω的结果,测量结果与仿真结果一致。实测结果表明,积分器频率特性的高频段背离了与频率成反比的线性衰减的理论趋势,这个结果与实际电路的杂散参数有关。通过转换纵坐标判断积分器的频率上限,结合计算的低频结果,可以得到积分器的工作带宽。应用积分器的幅频特性公式结合扫频测量结果计算RC常数,该方法较为简便且不确定度较小。
  • 图  1  无源积分器的简化电路

    Figure  1.  Simplified circuit of passive integrator

    图  2  负载阻抗对无源积分器频率特性的影响

    Figure  2.  Influence of load impedance on frequency characteristics of passive integrator

    图  3  积分器频响特性测量示意图

    Figure  3.  Diagram of frequency response characteristic measurement of integrator

    图  4  系列参数积分器的S21参数测量结果

    Figure  4.  Measurement results of S21 parameters of series parameter passive integrator

    图  5  纵轴转换后系列积分器的频响特性

    Figure  5.  Frequency response characteristics of series integrator after y-axis is transformed

    图  6  测量的积分器低频特性与理想积分器仿真结果比较

    Figure  6.  Comparison of low frequency characteristics of measured integrator and simulation results of ideal integrator

    图  7  使用有源探头与直接测试的频响特性比较

    Figure  7.  Comparison of frequency response characteristics with and without active probe

    图  8  纵轴转换后的频响特性比较

    Figure  8.  Comparison of frequency response characteristics of integrator after y-axis is transformed

    表  1  积分器的频率特性数据

    Table  1.   Frequency characteristics data of passive integrator

    RC/μs fL/kHz fH/MHz
    1 159 1200
    2 80 1100
    4 40 800
    10 16 500
    20 8.0 500
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-08-18
  • 修回日期:  2025-02-10
  • 录用日期:  2025-02-10
  • 网络出版日期:  2025-03-07
  • 刊出日期:  2025-03-15

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