Design of Miniaturized Dual-Layer Substrate Integrated Waveguide Bandpass Filters in Box-Like Coupling Scheme

LIU Qing; LIU Bao-liang; ZHANG De-wei; LI Jian-bing; WEI Jin-jin; LIU Qi-kun

doi:10.12263/DZXB.20211136

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Design of Miniaturized Dual-Layer Substrate Integrated Waveguide Bandpass Filters in Box-Like Coupling Scheme

PAPERS | 更新时间：2025-12-08

- Design of Miniaturized Dual-Layer Substrate Integrated Waveguide Bandpass Filters in Box-Like Coupling Scheme
- ACTA ELECTRONICA SINICA Vol. 50, Issue 11, Pages: 2668-2677(2022)
- 作者机构：
  
  1.战略支援部队信息工程大学, 河南郑州 450002
  2.河南省工业学校, 河南郑州 450011
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20211136
  CLC： TN715
- Received：23 August 2021，
  
  Revised：2022-01-08，
  
  Published：25 November 2022
- 稿件说明：
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刘庆,刘宝亮,张德伟等.小型化双层基片集成波导盒型耦合拓扑滤波器设计[J].电子学报,2022,50(11):2668-2677.

LIU Qing,LIU Bao-liang,ZHANG De-wei,et al.Design of Miniaturized Dual-Layer Substrate Integrated Waveguide Bandpass Filters in Box-Like Coupling Scheme[J].ACTA ELECTRONICA SINICA,2022,50(11):2668-2677.
刘庆,刘宝亮,张德伟等.小型化双层基片集成波导盒型耦合拓扑滤波器设计[J].电子学报,2022,50(11):2668-2677. DOI： 10.12263/DZXB.20211136.

LIU Qing,LIU Bao-liang,ZHANG De-wei,et al.Design of Miniaturized Dual-Layer Substrate Integrated Waveguide Bandpass Filters in Box-Like Coupling Scheme[J].ACTA ELECTRONICA SINICA,2022,50(11):2668-2677. DOI： 10.12263/DZXB.20211136.

摘要

针对微波滤波器小型化、高性能的应用需求，首先分析了单腔双模和双腔单模谐振器组合型滤波器等效耦合拓扑的特性，然后提出了三种双层单腔双模和双腔单模基片集成波导谐振器组合的带通滤波器结构，它们等效为盒型耦合拓扑，但具有不同的对角交叉耦合路径.两个单模谐振器位于上层介质板，并分别与输入输出馈线相连；双模谐振器位于下层介质板，并通过中间金属层上的槽线与单模谐振器耦合.详细分析了旁路耦合、磁耦合和频变耦合提供对角耦合路径时，滤波器特性及传输零点位置的可控性.最后设计了两个中心频率为7.5GHz、带宽为240MHz的带通滤波器，并进行加工和测试.测试和仿真结果一致性较好，验证了双层单腔双模和双腔单模基片集成波导滤波器结构的可行性.

Abstract

Coupling scheme' characteristics of a bandpass filter(BPF) based on one dual-mode and two single-mode cavities are analyzed

and three dual-layer substrate integrated waveguide(SIW) BPFs with one dual-mode cavity and two single-mode cavities are proposed according to the requirements of miniaturization and high performances. The three proposed BPFs can be equivalent to box-section coupling schemes with different diagonal cross-coupling paths. Two single-mode SIW cavities are located on the upper substrate

and the two cavities are connected to input and output feeding lines

respectively. One dual-mode SIW cavity is located on the lower substrate

and the dual modes are coupling to the single-mode cavity using the slot lines on the middle-layer metal. Characteristic of the proposed filters and controllability of transmission zeros' locations are analyzed in detail

when the bypass coupling

magnetic coupling and frequency-dependent coupling provide the diagonal coupling path

respectively. Finally

two BPFs with the center frequency of 7.5GHz and bandwidth of 240MHz are designed

fabricated and measured. Simulated and measured results are in good agreement

which demonstrates the feasibility of the proposed dual-layer SIW filters based on one dual-mode and two single-mode cavities.

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references

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