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基于开放式TEM小室的电场探头校准及改进方法

王皓琰 李俊娜 龚渝涵 刘建

王皓琰, 李俊娜, 龚渝涵, 等. 基于开放式TEM小室的电场探头校准及改进方法[J]. 强激光与粒子束, 2022, 34: 093002. doi: 10.11884/HPLPB202234.210461
引用本文: 王皓琰, 李俊娜, 龚渝涵, 等. 基于开放式TEM小室的电场探头校准及改进方法[J]. 强激光与粒子束, 2022, 34: 093002. doi: 10.11884/HPLPB202234.210461
Wang Haoyan, Li Junna, Gong Yuhan, et al. Electric field probe calibration and improvement method based on open TEM cell[J]. High Power Laser and Particle Beams, 2022, 34: 093002. doi: 10.11884/HPLPB202234.210461
Citation: Wang Haoyan, Li Junna, Gong Yuhan, et al. Electric field probe calibration and improvement method based on open TEM cell[J]. High Power Laser and Particle Beams, 2022, 34: 093002. doi: 10.11884/HPLPB202234.210461

基于开放式TEM小室的电场探头校准及改进方法

doi: 10.11884/HPLPB202234.210461
基金项目: 装备发展共用技术预研项目(80924010203)
详细信息
    作者简介:

    王皓琰,why_xjtu@163.com

    通讯作者:

    李俊娜,uvlina@126.com

  • 中图分类号: O441

Electric field probe calibration and improvement method based on open TEM cell

  • 摘要: 目前的电场探头标定实验大多只考虑TEM小室结构和性能的影响,在校准实验中,探头的放入使得标定结果产生了很大的偏差,相较于TEM小室,电场探头的尺寸是产生误差的主要原因。以开放式TEM小室为基础,考虑了实际模型和电场探头的影响,利用三维电磁仿真软件,从时域角度研究了不同结构和尺寸TEM小室的辐射场分布,并从频域角度对TEM小室的S参数进行分析。比较了探头放入小室前后的误差,并根据计算结果引入了电场的校准公式。为改善探头对电场的影响,设计了一种新型结构,结果表明,新结构在保证带宽的同时,提高了电场的均匀性和探头标定的准确度。
  • 图  1  开放式TEM小室

    Figure  1.  Open TEM cell

    图  2  d=149 mm结构中分别距离芯板和下极板1 mm的电场波形

    Figure  2.  Electric field waveforms at h=1 mm and h=148 mm when d=149 mm

    图  3  S21S11参数

    Figure  3.  S21 parameters and S11 parameters

    图  4  放入探头的模型

    Figure  4.  Model with the probe

    图  5  误差αh的拟合曲线

    Figure  5.  Fitting curve of error with h

    图  6  改进结构的TEM小室

    Figure  6.  TEM cell with improved structure

    图  7  改进结构的S21S11参数

    Figure  7.  S21 and S11 parameters of improved structure

    表  1  电场分布及误差

    Table  1.   Electric field distribution and error

    measuring
    point/mm
    amplitude/(V·m−1)error/%amplitude/(V·m−1)error/%amplitude/(V·m−1)error/%amplitude/(V·m−1)error/%
    d=149 mmd=199 mmd=249 mmd=299 mm
    (0,0, 1) 68843 2.56 51550 2.59 41207 2.60 34334 2.66
    (0,0, 40) 68197 1.61 51313 2.11 41065 2.25 34184 2.21
    (0,0, 80) 66901 0.32 50671 0.84 40887 1.81 34032 1.76
    (0,0, 120) 65741 1.77 49910 0.46 40223 0.15 33775 0.99
    (0,0, 160) 49318 1.86 39891 0.67 33401 0.12
    (0,0, 200) 39573 1.46 33063 1.14
    (0,0, d-1) 65501 2.40 49106 2.28 39199 2.40 32623 2.45
    下载: 导出CSV

    表  2  放入探头的电场分布及误差

    Table  2.   Electric field distribution and error after the probe is placed

    insulation
    size
    measuring
    point/mm
    amplitude/(V·m−1)error/% amplitude/(V·m−1)error/% amplitude/(V·m−1)error/% amplitude/(V·m−1)error/%
    d=149 mmd=199 mmd=249 mmd=299 mm
    l1=2 mm
    l2=18 mm
    (0,0, 1) 78275 16.63 54525 8.51 42449 5.70 34973 4.57
    (0,0, 40) 80811 20.41 54913 9.28 42541 5.93 35071 4.86
    (0,0, 80) 88251 31.49 56975 13.38 42817 6.61 35121 5.01
    (0,0, 120) 62002 23.38 44270 10.23 35275 5.47
    (0,0, 160) 47509 18.30 36282 8.48
    (0,0, 200) 39134 17.01
    (0,0, d−51) 89744 33.72 64210 27.78 51174 27.42 43536 30.17
    l1=10 mm
    l2=10 mm
    (0,0, 1) 81041 20.75 55809 11.06 43097 7.31 35154 5.11
    (0,0, 40) 84301 25.61 56469 12.37 43213 7.60 35284 5.50
    (0,0, 80) 93231 38.91 59454 18.31 43772 8.99 35418 5.90
    (0,0, 120) 66239 31.82 45946 14.40 35702 6.75
    (0,0, 160) 51000 26.99 37055 10.79
    (0,0, 200) 40062 19.78
    (0,0, d51) 95022 41.58 69146 37.60 55534 38.28 45989 37.51
    下载: 导出CSV

    表  3  改进结构的电场分布及误差

    Table  3.   Electric field distribution and error of improved structure

    measuring
    point/mm
    amplitude/(V·m−1)error/(%)amplitude/(V·m−1)error/%amplitude/(V·m−1)error/%amplitude/(V·m−1)error/%
    d=149 mmd=199 mmd=249 mmd=299 mm
    (0,0, 1) 68829 2.56 51688 2.85 41286 2.80 34512 3.19
    (0,0, 40) 68313 1.79 51361 2.21 41127 2.41 34213 2.30
    (0,0, 80) 67034 0.12 50797 1.09 40824 1.65 34019 1.72
    (0,0, 120) 65880 1.84 50065 0.37 40345 0.46 33720 0.83
    (0,0, 160) 49405 1.68 39871 0.72 33438 0.02
    (0,0, 200) 39514 1.61 33120 0.97
    (0,0, d−1) 65598 2.26 49214 2.06 39332 2.06 32738 2.11
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-02
  • 修回日期:  2021-12-20
  • 录用日期:  2021-12-30
  • 网络出版日期:  2022-06-16
  • 刊出日期:  2022-06-17

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