Novel Filtering 180° Hybrid Coupler and Its Application to 2 x 4 Filtering Butler Matrix

Qiang Shao; Fu-chang Chen; Qing-xin Chu; Michael J. Lancaster

doi:10.1109/TMTT.2018.2829894

Novel Filtering 180° Hybrid Coupler and Its Application to 2 x 4 Filtering Butler Matrix

Qiang Shao, Fu-chang Chen, Qing-xin Chu, Michael J. Lancaster

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

389 Downloads (Pure)

Abstract

In this paper, a novel filtering 180° hybrid coupler is proposed and used to design a 2 x 4 filtering Butler matrix. The filtering 180° hybrid coupler can provide power division and phase shift together with a second-order bandpass transfer function, and is based only on coupled resonators. The 2 x 4 filtering Butler matrix is easily realized by utilizing several hybrid couplers. The analytical synthesis procedures for the hybrid coupler and Butler matrix are presented in this paper. Finally, broadside and end-fire arrays are realized by using the Butler matrix. To illustrate the concept experimentally, a filtering 180° microstrip hybrid coupler and a 2 x 4 filtering microstrip Butler matrix are designed, fabricated, and measured. Simulation and measured results are found to be in good agreement with each other.

Original language	English
Pages (from-to)	3288 - 3296
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	66
Issue number	7
Early online date	10 May 2018
DOIs	https://doi.org/10.1109/TMTT.2018.2829894
Publication status	Published - Jul 2018

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10.1109/TMTT.2018.2829894Licence: Creative Commons: Attribution (CC BY)

Shao_et_al_Novel_Filtering_Hybrid_Coupler_Microwave_Theory_Techniques_FinalFinal published version, 2.41 MBLicence: Creative Commons: Attribution (CC BY)

Terahertz Technology for Future Road Vehicles (TRAVEL)
Gardner, P. (Principal Investigator), Constantinou, C. (Co-Investigator), Feresidis, A. (Co-Investigator), Gashinova, M. (Co-Investigator), Cherniakov, M. (Co-Investigator) & Lancaster, M. (Co-Investigator)
Engineering & Physical Science Research Council
30/06/14 → 31/12/18
Project: Research

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title = "Novel Filtering 180° Hybrid Coupler and Its Application to 2 x 4 Filtering Butler Matrix",

abstract = "In this paper, a novel filtering 180° hybrid coupler is proposed and used to design a 2 x 4 filtering Butler matrix. The filtering 180° hybrid coupler can provide power division and phase shift together with a second-order bandpass transfer function, and is based only on coupled resonators. The 2 x 4 filtering Butler matrix is easily realized by utilizing several hybrid couplers. The analytical synthesis procedures for the hybrid coupler and Butler matrix are presented in this paper. Finally, broadside and end-fire arrays are realized by using the Butler matrix. To illustrate the concept experimentally, a filtering 180° microstrip hybrid coupler and a 2 x 4 filtering microstrip Butler matrix are designed, fabricated, and measured. Simulation and measured results are found to be in good agreement with each other.",

author = "Qiang Shao and Fu-chang Chen and Qing-xin Chu and Lancaster, {Michael J.}",

year = "2018",

month = jul,

doi = "10.1109/TMTT.2018.2829894",

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pages = "3288 -- 3296",

journal = "IEEE Transactions on Microwave Theory and Techniques",

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AU - Shao, Qiang

AU - Chen, Fu-chang

AU - Chu, Qing-xin

AU - Lancaster, Michael J.

PY - 2018/7

Y1 - 2018/7

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AB - In this paper, a novel filtering 180° hybrid coupler is proposed and used to design a 2 x 4 filtering Butler matrix. The filtering 180° hybrid coupler can provide power division and phase shift together with a second-order bandpass transfer function, and is based only on coupled resonators. The 2 x 4 filtering Butler matrix is easily realized by utilizing several hybrid couplers. The analytical synthesis procedures for the hybrid coupler and Butler matrix are presented in this paper. Finally, broadside and end-fire arrays are realized by using the Butler matrix. To illustrate the concept experimentally, a filtering 180° microstrip hybrid coupler and a 2 x 4 filtering microstrip Butler matrix are designed, fabricated, and measured. Simulation and measured results are found to be in good agreement with each other.

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DO - 10.1109/TMTT.2018.2829894

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JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

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ER -

Novel Filtering 180° Hybrid Coupler and Its Application to 2 x 4 Filtering Butler Matrix

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Terahertz Technology for Future Road Vehicles (TRAVEL)

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