Novel Filtering Quadrature Coupler with Reconfigurable Frequency and Output Direction

ZHU Xu; YANG Jian; YANG Tao

doi:10.12263/DZXB.20210820

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Novel Filtering Quadrature Coupler with Reconfigurable Frequency and Output Direction

Intelligent game of electromagnetic spectrum | 更新时间：2025-12-08

- Novel Filtering Quadrature Coupler with Reconfigurable Frequency and Output Direction
- ACTA ELECTRONICA SINICA Vol. 50, Issue 6, Pages: 1331-1335(2022)
- 作者机构：
  
  1.中国人民解放军32802部队，北京 100191
  2.电子科技大学电子科学与工程学院，四川成都 611731
  Technology of China, Chengdu, Sichuan 611731, China
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20210820
  CLC： TN713;
- Received：01 July 2021，
  
  Revised：2021-08-24，
  
  Published：25 June 2022
- 稿件说明：
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朱旭,杨健,杨涛.中心频率与输出端口可重构的新型滤波分支线电桥[J].电子学报,2022,50(06):1331-1335.

ZHU Xu,YANG Jian,YANG Tao.Novel Filtering Quadrature Coupler with Reconfigurable Frequency and Output Direction[J].ACTA ELECTRONICA SINICA,2022,50(06):1331-1335.
朱旭,杨健,杨涛.中心频率与输出端口可重构的新型滤波分支线电桥[J].电子学报,2022,50(06):1331-1335. DOI： 10.12263/DZXB.20210820.

ZHU Xu,YANG Jian,YANG Tao.Novel Filtering Quadrature Coupler with Reconfigurable Frequency and Output Direction[J].ACTA ELECTRONICA SINICA,2022,50(06):1331-1335. DOI： 10.12263/DZXB.20210820.

摘要

本文提出了一种中心频率与输出端口均可重构的滤波分支线电桥设计方法.验证电路由4个半波长环形阶跃阻抗谐振器（Step Impedance Resonator，SIR）构成，谐振器开路端与谐振器之间加载变容二极管用于控制中心频率以及谐振器级间耦合的强弱.为了实现滤波响应，传统分支线电桥的传输线用不同电磁特性的导纳变换器替代.通过这一简单的结构，可以在不添加额外开关电路的条件下实现滤波分支线电桥输出端口的变换.电路使用微带线谐振器设计并加工、测试.测试结果表明，该电路的中心频率调节范围为1.2~1.6 GHz，正向输出时的相差为90°，反向输出时的相差为

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Abstract

In this paper

a novel filtering quadrature coupler(FQC) with reconfigurable frequency and output direction is presented. It simply consists of four half-wavelength step impedance resonators(SIRs) loaded with varactors at the open ends for frequency tuning and between resonators for inter-stage coupling control. Admittance invertors with electrical and magnetic types are utilized to replace the transmission lines in conventional quadrature coupler for filtering response. By using the simple configuration

the proposed FQC can realize reconfigurable output directions without any switch component. Theoretical analysis has been given and a microstrip prototype has been designed

fabricated and measured to demonstrate the proposed technique. The measured results show that the proposed FQC can continuously cover the frequency range of 1.2~1.6 GHz at forward output direction with 90° phase difference and at backward output direction with -90° phase difference.

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references

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LIN F , CHU Q X , WONG S W . Design of dual-band filtering quadrature coupler using /2 and /4 resonators [J]. IEEE Microwave and Wireless Components Letters , 2012 , 22 ( 11 ): 565 - 567 .

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ABDALLA M A Y , PHANG K , ELEFTHERIADES G V . A compact highly reconfigurable CMOS MMIC directional coupler [J]. IEEE Transactions on Microwave Theory and Techniques , 2008 , 56 ( 2 ): 305 - 319 .

ZHU X , YANG T , CHI P L , et al . Novel reconfigurable filtering rat-race coupler, branch-line coupler, and multiorder bandpass filter with frequency, bandwidth, and power division ratio control [J]. IEEE Transactions on Microwave Theory and Techniques , 2020 , 68 ( 4 ): 1496 - 1509 .

HAGAG M F , KHATER M ABU , SINANIS M D , et al . Ultra-compact tunable filtering rat-race coupler based on half-mode SIW evanescent-mode cavity resonators [J]. IEEE Transactions on Microwave Theory and Techniques , 2018 , 66 ( 12 ): 5563 - 5572 .

ZHU X , YANG T , CHI P L , et al . Novel tunable isolation network used in ring-type single-to-balanced, power-dividing, and single-ended filter with arbitrary power-division ratios [J]. IEEE Transactions on Microwave Theory and Techniques , 2020 , 68 ( 2 ): 666 - 680 .

HONG J S , LANCASTER M J . Microstrip Filters for RF/Microwave Applications [M]. New York : John Wiley & Sons, Inc. , 2001 .

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