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基于波导缝隙天线的TEM室频率扩展方法

宋春江 冯骁尧 戴飞

宋春江, 冯骁尧, 戴飞等 . 基于波导缝隙天线的TEM室频率扩展方法[J]. 北京航空航天大学学报, 2018, 44(4): 785-791. doi: 10.13700/j.bh.1001-5965.2017.0296
引用本文: 宋春江, 冯骁尧, 戴飞等 . 基于波导缝隙天线的TEM室频率扩展方法[J]. 北京航空航天大学学报, 2018, 44(4): 785-791. doi: 10.13700/j.bh.1001-5965.2017.0296
SONG Chunjiang, FENG Xiaoyao, DAI Feiet al. Frequency extension method of TEM cells based on slotted waveguide antenna[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(4): 785-791. doi: 10.13700/j.bh.1001-5965.2017.0296(in Chinese)
Citation: SONG Chunjiang, FENG Xiaoyao, DAI Feiet al. Frequency extension method of TEM cells based on slotted waveguide antenna[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(4): 785-791. doi: 10.13700/j.bh.1001-5965.2017.0296(in Chinese)

基于波导缝隙天线的TEM室频率扩展方法

doi: 10.13700/j.bh.1001-5965.2017.0296
基金项目: 

国家自然科学基金 61571027

国家自然科学基金 61521091

国家自然科学基金 61427803

详细信息
    作者简介:

    宋春江  男, 硕士研究生, 助理研究员。主要研究方向:电磁兼容、雷达

    冯骁尧  男, 硕士研究生。主要研究方向:电磁兼容

    戴飞  男, 博士, 副教授。主要研究方向:电磁兼容

    通讯作者:

    戴飞, E-mail: daphige@buaa.edu.cn

  • 中图分类号: TM937.1

Frequency extension method of TEM cells based on slotted waveguide antenna

Funds: 

National Natural Science Foundation of China 61571027

National Natural Science Foundation of China 61521091

National Natural Science Foundation of China 61427803

More Information
  • 摘要:

    为突破实际测试当中的局限,研究了横电磁波传输(TEM)室频率范围的扩展方法。运用电磁场与微波技术相关原理,通过分析TEM室壳体开缝对高次模的影响,利用壳体表面电流分布变化规律和波导缝隙天线原理重新解释了开缝对高次模的抑制作用,进而提出了一种TEM室壳体表面开缝的设计方法。通过电磁场数值仿真,验证了抑制高次模工程方法的有效性,并对其控制参数和约束条件的准确性进行了分析评估;通过加工实物并进行实测,进一步验证了新方法的效果。仿真与测试结果表明,开缝抑制高次模的工程方法能够在不减小测试空间与影响主模传输的前提下,将测试带宽扩展了42.9%。

     

  • 图 1  TEM室结构尺寸

    Figure 1.  Structure size of TEM cell

    图 2  TEM室S参数仿真结果

    Figure 2.  Simulation results of S parameter of TEM cell

    图 3  主模电磁场和电流分布

    Figure 3.  Electromagnetic field and current distribution of main mode

    图 4  第一阶高次模电磁场分布

    Figure 4.  Electromagnetic field distribution of first-order higher order mode

    图 5  第一阶高次模电流分布

    Figure 5.  Current distribution of first-order higher order mode

    图 6  TEM室开缝后1.68GHz电流分布

    Figure 6.  GHz current distribution of slotted TEM cell

    图 7  波导缝隙天线的形式[14]

    Figure 7.  Types of slotted waveguide antenna[14]

    图 8  第一阶高次模频率随隔板宽度变化规律

    Figure 8.  Variation of first-order higher order mode frequency with width of septum

    图 9  抑制高次模的开缝方式

    Figure 9.  Slotting method to suppress higher order mode

    图 10  TEM室开缝后S参数仿真结果

    Figure 10.  Simulation results of S parameter of slotted TEM cell

    图 11  TEM室实物图

    Figure 11.  Photos of TEM cell

    图 12  TEM室实物测试图

    Figure 12.  Testing photo of TEM cell

    图 13  实物测试S参数结果

    Figure 13.  S parameter results of real cell test

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出版历程
  • 收稿日期:  2017-05-10
  • 录用日期:  2017-06-09
  • 网络出版日期:  2018-04-20

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