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具有小型化与高选择性的双频带通滤波器的设计

王远 刘超 南敬昌 高明明

王远,刘超,南敬昌,等. 具有小型化与高选择性的双频带通滤波器的设计[J]. 电波科学学报,xxxx,xx(xx):x-xx. DOI: 10.12265/j.cjors.2021138
引用本文: 王远,刘超,南敬昌,等. 具有小型化与高选择性的双频带通滤波器的设计[J]. 电波科学学报,xxxx,xx(xx):x-xx. DOI: 10.12265/j.cjors.2021138
WANG Y, LIU C, NAN J C, et al. Design of a dual-band bandpass filter with miniaturization and high selectivity[J]. Chinese journal of radio science,xxxx,xx(xx):x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021138
Citation: WANG Y, LIU C, NAN J C, et al. Design of a dual-band bandpass filter with miniaturization and high selectivity[J]. Chinese journal of radio science,xxxx,xx(xx):x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021138

具有小型化与高选择性的双频带通滤波器的设计

doi: 10.12265/j.cjors.2021138
基金项目: 国家自然科学基金(61971210);辽宁省教育厅科学研究经费(LJ2020QNL016);国家留学基金(CSC201908210174)
详细信息
    作者简介:

    王远:(1997—),男,河北人,辽宁工程技术大学研究生,研究方向为射频无源滤波器的研究与设计

    刘超:(1981—),男,辽宁人,辽宁工程技术大学硕士生指导教师,硕士,研究方向为数字系统、嵌入式系统、射频与微波系统设计

    南敬昌:(1971—),男,河南人,辽宁工程技术大学教授,硕士生导师,博士,研究方向为射频电路与器件、多媒体信息编码、通信系统仿真等

    通讯作者:

    王远 E-mail:821485478@qq.com

  • 中图分类号: TN713

Design of a dual-band bandpass filter with miniaturization and high selectivity

  • 摘要: 为了满足C波段卫星通信系统的应用需求,提出了一种具有小型化与高选择性的双频带通基片集成波导滤波器. 滤波器第一通带由蚀刻在四分之一模基片集成波导腔顶层的L型谐振槽提供,第二通带由新型左右手结构提供. 其中L型谐振槽可以充当四分之一波长谐振器,激励腔内基本模式产生低频处的响应;新型左右手结构较传统结构增大了叉指电容值,降低了谐振频率. 通过仿真优化和测试,双频带通滤波器的中心频率为3.9 GHz和6.2 GHz,相对带宽为3.3%和2.1%,通带之间的衰减优于70 dB,且在通带外存在三个传输零点,具有良好的频率选择性. 表明了所提滤波器具有体积小、选择性高的特性,非常适合集成于卫星通信前端系统中.
  • 图  1  滤波器结构图

    Fig.  1  Structure of the filter structure

    图  2  滤波器的前四个本征模式电场矢量分布图

    Fig.  2  Electric vector field distribution of the first four eigen-modes of the filter

    图  3  谐振单元耦合示意图

    Fig.  3  The graph of coupling scheme of the resonant unit

    图  4  耦合QMSIW滤波器传输特性

    Fig.  4  Coupled QMSIW filter transmission characteristics

    图  5  L1+L2对中心频率的影响

    Fig.  5  L1+L2 influence on center frequency

    图  6  加载传统CRLH结构的SIW腔

    Fig.  6  SIW loaded with conventional CRLH structure

    图  7  加载传统CRLH结构的SIW腔的等效电路图

    Fig.  7  Diagram of equivalent circuit of SIW loaded with conventional CRLH structure

    图  8  两种CRLH结构的比较

    Fig.  8  The comparison of two CRLH structures

    图  9  仿真与测试结果比对

    Fig.  9  The comparison of simulation and measurement

    图  10  滤波器实物图

    Fig.  10  Physical picture of the filter

    表  1  滤波器的尺寸

    Tab.  1  The size of the filter

    mm
    参数取值参数取值
    $L$18.0$L_1$4.5
    $W$9.0$L_2$7.4
    $P$6.5$L_3$7.2
    $K$1.5$L_4$3.0
    $O$0.8$W_1$0.2
    $D$0.4$W_2$0.6
    $S$0.6
    下载: 导出CSV

    表  2  滤波器性能比较

    Tab.  2  Comparison with other references

    文献中心频率/GHz阶数传输零点数尺寸
    [6]13.00/14.003318.3 mm×51.7 mm
    [7]10.05/13.702114.3 mm×16.0 mm
    [8]5.39/10.122314.0 mm×25.5 mm
    [9]5.80/18.10238.5 mm×16.0 mm
    [10]5.00/8.504433.9 mm×53.0 mm
    本文3.90/6.20339.0 mm×18.0 mm
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-13
  • 网络出版日期:  2021-09-06

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