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新型负耦合结构在基片集成波导滤波器中的应用

刘庆 吕大龙 卞晨阁 周东方

刘庆, 吕大龙, 卞晨阁, 等. 新型负耦合结构在基片集成波导滤波器中的应用[J]. 强激光与粒子束, 2019, 31: 123001. doi: 10.11884/HPLPB201931.190189
引用本文: 刘庆, 吕大龙, 卞晨阁, 等. 新型负耦合结构在基片集成波导滤波器中的应用[J]. 强激光与粒子束, 2019, 31: 123001. doi: 10.11884/HPLPB201931.190189
Liu Qing, Lü Dalong, Bian Chenge, et al. New negative coupling structure and its application on substrate integrated waveguide bandpass filters[J]. High Power Laser and Particle Beams, 2019, 31: 123001. doi: 10.11884/HPLPB201931.190189
Citation: Liu Qing, Lü Dalong, Bian Chenge, et al. New negative coupling structure and its application on substrate integrated waveguide bandpass filters[J]. High Power Laser and Particle Beams, 2019, 31: 123001. doi: 10.11884/HPLPB201931.190189

新型负耦合结构在基片集成波导滤波器中的应用

doi: 10.11884/HPLPB201931.190189
详细信息
    作者简介:

    刘 庆(1991—),男,博士研究生,主要从事射频/微波器件研究;liuqing8123@163.com

    通讯作者:

    吕大龙(1981—),男,讲师,主要从事射频/微波器件和天线研究及应用;ldl2076@163.com

  • 中图分类号: TN715

New negative coupling structure and its application on substrate integrated waveguide bandpass filters

  • 摘要: 针对高性能交叉耦合基片集成波导带通滤波器的应用,提出一种新型负耦合结构,该耦合结构由两个短路耦合线设计实现,并详细分析了其特性,能够实现较弱或较强的负耦合。总结了基于特征多项式的耦合矩阵综合优化方法,并通过两个滤波器的设计进行说明。基于综合得到的两个耦合矩阵,设计了两个中心频率为10 GHz的四阶交叉耦合基片集成波导带通滤波器,第一个滤波器的归一化相对带宽为3%,负耦合结构提供交叉耦合,用于说明该耦合结构提供相对较弱的耦合强度;第二个滤波器的相对带宽为8%,负耦合结构提供主耦合,用于说明该耦合结构提供较强的负耦合强度。为了验证滤波器的实际性能,对这两款滤波器进行了加工和测试。测试和仿真结果一致性较好,表明了该负耦合结构用于高性能交叉耦合基片集成波导滤波器设计的可行性。最后讨论了弱色散交叉耦合对传输零点位置的影响。
  • 图  1  负耦合结构

    Figure  1.  Layout of the proposed negative coupling structure

    图  2  两个谐振器相耦合的电场分布

    Figure  2.  Electric-field distributions of the two coupled SIW cavities

    图  3  提取的耦合系数及归一化变换器K/Z0

    Figure  3.  Extracted coupling coefficient and normalized inverter K/Z0

    图  4  滤波器的耦合矩阵响应

    Figure  4.  Filtering responses based on coupling matrixes

    图  5  滤波器I的结构示意图、仿真、测试结果

    Figure  5.  Structure, simulated and measured data of the proposed filter I

    图  6  滤波器II的结构示意图、仿真、测试结果

    Figure  6.  Structure, simulated and measured data of the proposed filter II

    图  7  弱色散交叉耦合对传输零点位置的影响

    Figure  7.  The influence of weak dispersive cross coupling on the locations of transmission zeros

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出版历程
  • 收稿日期:  2019-05-27
  • 修回日期:  2019-09-29
  • 刊出日期:  2019-12-01

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