Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide

SHEN Rui-liang; FENG Wen-jie; NI Xiao-yu; WANG Hui; SHI Yong-rong

doi:10.12263/DZXB.20211201

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Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide

PAPERS | 更新时间：2025-12-08

- Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide
- ACTA ELECTRONICA SINICA Vol. 51, Issue 8, Pages: 2118-2123(2023)
- 作者机构：
  
  1.华南理工大学广东省毫米波与太赫兹重点实验室，广东广州 510640
  2.南京理工大学通信工程系，江苏南京 210094
  3.南京航空航天大学电子信息工程学院，江苏南京 211106
- 作者简介：
- 基金信息：
  
  Pearl River Talent Innovation and Entrepreneurship Team Project in Guangdong Province(2017ZT07X032)
- DOI：10.12263/DZXB.20211201
  CLC： TN928;
- Received：01 September 2021，
  
  Revised：2022-05-09，
  
  Published：25 August 2023
- 稿件说明：
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沈瑞亮,冯文杰,倪啸宇等.基于间隙波导的毫米波宽带定向耦合器[J].电子学报,2023,51(08):2118-2123.

SHEN Rui-liang,FENG Wen-jie,NI Xiao-yu,et al.Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide[J].ACTA ELECTRONICA SINICA,2023,51(08):2118-2123.
沈瑞亮,冯文杰,倪啸宇等.基于间隙波导的毫米波宽带定向耦合器[J].电子学报,2023,51(08):2118-2123. DOI： 10.12263/DZXB.20211201.

SHEN Rui-liang,FENG Wen-jie,NI Xiao-yu,et al.Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide[J].ACTA ELECTRONICA SINICA,2023,51(08):2118-2123. DOI： 10.12263/DZXB.20211201.

摘要

本文基于新型间隙波导传输线技术，设计了一种宽带的0 dB前向波定向耦合器，提出的耦合器中心频率在30 GHz，可以实现宽带平坦的0 dB耦合特性，通过在两个相邻

的槽间隙波导的公共壁上开耦合缝隙来实现主通道到副通道的能量耦合.为了方便实验测试，还设计了宽带的槽间隙波导到标准WR-28波导的过渡转换结构.最后进行了实物加工与测量，根据测量结果，本文提出的定向耦合器工作频带为27.1~31.5 GHz，带内最大插入损耗约为0.5 dB，且回波损耗小于

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9.31333351

2.37066650

，耦合器的相对带宽为14.7%（中心频率30 GHz）.测量结果与仿真结果吻合较好，实验验证了该设计方法的正确性.

Abstract

In this paper

a broadband 0 dB forward wave directional coupler is designed based on the new gap waveguide transmission line technology. The center frequency of the proposed coupler is 30 GHz

which can realize broadband flat 0 dB coupling level. The energy coupling from the main channel to the auxiliary channel is realized by multi coupling slots on the common wall of two adjacent groove gap waveguides. For the convenience of experimental measurement and verification

the transition from groove gap waveguide to standard WR-28 waveguide is designed. Finally

the designed coupler is manufactured and measured. According to the measurement results

the proposed directional coupler working frequency band is 27.1~31.5 GHz and maximum insertion loss is about 0.5 dB

the return loss is less than

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9.31333351

2.37066650

and relative bandwidth is about 14.7% (center frequency is 30 GHz). The simulated result and measurement result agree well with each other

and the correctness of the design method is verified by experiments.

关键词

Keywords

references

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SHARKAWY M AL , KISHK A A . Wideband beam-scanning circularly polarized inclined slots using ridge gap waveguide [J ] . IEEE Antennas and Wireless Propagation Letters , 2014 , 13 : 1187 - 1190 .

SHAMS S I , KISHK A A . Wide band power divider based on Ridge gap waveguide [C ] // 2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) . Montreal : IEEE , 2016 : 1 - 2 .

BIRGERMAJER S , JANKOVIĆ N , CRNOJEVIĆ-BENGIN V , et al . Forward-wave 0 dB directional coupler based on microstrip-ridge gap waveguide technology [C ] // 2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications(TELSIKS) . Nis : IEEE , 2017 : 154 - 157 .

LEVY R . Improved single and multiaperature waveguide coupling theory, including explanation of mutual interactions [J ] . IEEE Transactions on Microwave Theory and Techniques , 1980 , 28 ( 4 ): 331 - 338 .

SCHMIEDEL H . Series-configuration of multi-line directional-coupler sections with improved coupling [C ] // 2004 IEEE MTT-S International Microwave Symposium Digest . Fort Worth : IEEE , 2004 : 339 - 342 .

COHN S B . Microwave coupling by large apertures [J ] . Proceedings of the IRE , 1952 , 40 ( 6 ): 696 - 699 .

ALI M M M , SEBAK A . Compact printed ridge gap waveguide crossover for future 5G wireless communication system [J ] . IEEE Microwave and Wireless Components Letters , 2018 , 28 ( 7 ): 549 - 551 .

FARAHANI M , AKBARI M , NEDIL M , et al . A novel low-loss millimeter-wave 3-dB 90° ridge-gap coupler using large aperture progressive phase compensation [J ] . IEEE Access , 2017 , 5 : 9610 - 9618 .

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