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基于缺陷地结构的微带低通滤波器设计

黄鹏 黄永茂 李良荣 金海焱

黄鹏, 黄永茂, 李良荣, 等. 基于缺陷地结构的微带低通滤波器设计[J]. 强激光与粒子束, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235
引用本文: 黄鹏, 黄永茂, 李良荣, 等. 基于缺陷地结构的微带低通滤波器设计[J]. 强激光与粒子束, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235
Huang Peng, Huang Yongmao, Li Liangrong, et al. Design of defected ground structure microstrip low-pass filters[J]. High Power Laser and Particle Beams, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235
Citation: Huang Peng, Huang Yongmao, Li Liangrong, et al. Design of defected ground structure microstrip low-pass filters[J]. High Power Laser and Particle Beams, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235

基于缺陷地结构的微带低通滤波器设计

doi: 10.11884/HPLPB201830.180235
基金项目: 

国家自然科学基金项目 61361012

四川省重点研发计划项目 2018GZ518

详细信息
    作者简介:

    黄鹏(1990—),男,硕士,主要从事天线和微波器件研究; 1269500078@qq.com

    通讯作者:

    李良荣(1963—),男,教授,主要从事EDA技术、电路系统、数字逻辑电路的教学与研究; lrli@gzu.edu.cn

    金海焱(1977—),男,博士,研究员,主要从事微波通信系统、射频电路的教学与研究; uestcjhy@uestc.edu.cn

  • 中图分类号: TN713

Design of defected ground structure microstrip low-pass filters

  • 摘要: 提出了一种具有宽带带外抑制的小型化微带低通滤波器。该滤波器由缺陷地结构和两阶阶跃阻抗单元结构构成。利用ANSYS HFSS建立三维全波电磁模型并仿真优化,仿真结果表明:该低通滤波器的截止频率为1.4 GHz,通带宽度为0~1.4 GHz,通带内的插入损耗小于0.5 dB,带外抑制频率范围为2.1~11 GHz,在阻带范围内的带外抑制能力接近20 dB。为验证仿真和测试结果,加工并测试了经全波电磁优化后的缺陷地结构微带低通滤波器。测试结果和仿真结果吻合得较好,证明了所提出的缺陷地结构在实现滤波器小型化和宽阻抗带宽上有着重要的作用,能够使该滤波器具有较好的低通滤波特性。
  • 图  1  缺陷地基本结构单元

    Figure  1.  Basic unit cell of the defected ground structure (DGS) loaded microstrip

    图  2  缺陷地结构低通滤波器

    Figure  2.  Initial DGS low-pass filter

    图  3  初始阶跃阻抗低通滤波器的顶部和底部的加工实物图

    Figure  3.  Top and bottom views of the fabricated DGS low-pass filter

    图  4  初始阶跃阻抗低通滤波器的仿真与实测结果图

    Figure  4.  Simulation and measured results of the initially fabricated DGS low-pass filter

    图  5  改进的缺陷地结构低通滤波器

    Figure  5.  Modified DGS low-pass filter

    图  6  缺陷地结构低通滤波器的等效电路图

    Figure  6.  Equivalent circuit of DGS low-pass filter

    图  7  优化的DGS低通滤波器等效电路仿真和HFSS仿真结果图

    Figure  7.  Simulation of equivalent circuit and HFSS of DGS low-pass filter

    图  8  改进的缺陷地结构低通滤波器顶部和底部的实物图

    Figure  8.  Top and bottom views of the modified DGS low-pass fiter

    图  9  改进的DGS低通滤波器HFSS仿真与实测结果图

    Figure  9.  Simulation and measured results of modified DGS low-pass filter

    表  1  缺陷地结构体统滤波器的等效电路元件参数表

    Table  1.   Equivalent circuit parameters of the DGS low-pass filter

    L1/nH L2/nH L3/nH C1/pF C2/pF C3/pF C4/pF
    2 10 0.6 0.1 2 4 0.2
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出版历程
  • 收稿日期:  2018-09-13
  • 修回日期:  2018-11-26
  • 刊出日期:  2018-12-15

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