E-plane waveguide filtering six-port junction

Xun Chen; Yi Wang; Talal Skaik; Qingfeng Zhang

doi:10.1109/TMTT.2021.3120094

E-plane waveguide filtering six-port junction

Xun Chen, Yi Wang, Talal Skaik, Qingfeng Zhang

Electronic, Electrical and Systems Engineering

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

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Abstract

A novel E-plane filtering six-port junction (SPJ) based on waveguide is presented. Different from the traditional designs, the proposed SPJ is formed by two identical filtering 180° couplers and two waveguide couplers with 180° and 90° phase shifts. A coupling-matrix (CM) technique, combining both resonant and nonresonant structures, has been developed to represent the entire SPJ. This has been used to predict the theoretical response as well as to investigate the effect of the couplers on the performance of the SPJ. A demonstrator has been designed to work at 10 GHz with a bandwidth of 0.4 GHz. Stub-loaded waveguide resonators have been used to keep a consistent profile and ease the layout of the complicated waveguide network. A good agreement between the CM-based theoretical responses, simulations, and measurement has been achieved. The measured average insertion loss is 0.4 dB, and the maximum in-band phase error is 10°. The measured in-band isolation between two input ports is higher than 26 dB.

Original language	English
Pages (from-to)	5360-5370
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	69
Issue number	12
Early online date	27 Oct 2021
DOIs	https://doi.org/10.1109/TMTT.2021.3120094
Publication status	E-pub ahead of print - 27 Oct 2021

Keywords

Coupling matrix (CM)
filtering coupler
six-port junction (SPJ)
waveguide

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2021.3120094Licence: None: All rights reserved

chenx2021eplane
This is an accepted manuscript version of an article first published in IEEE Transactions on Microwave Theory and Techniques. The final version of record is available at https://doi.org/10.1109/TMTT.2021.3120094
Accepted author manuscript, 3.16 MBLicence: None: All rights reserved

10 MHz to 1.1 THz Vector Network Analyser
Constantinou, C., Lancaster, M., Gashinova, M., Gardner, P., Wang, Y. & Hanham, S.
Engineering & Physical Science Research Council
1/09/17 → 31/08/23
Project: Research Councils

Cite this

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title = "E-plane waveguide filtering six-port junction",

abstract = "A novel E-plane filtering six-port junction (SPJ) based on waveguide is presented. Different from the traditional designs, the proposed SPJ is formed by two identical filtering 180° couplers and two waveguide couplers with 180° and 90° phase shifts. A coupling-matrix (CM) technique, combining both resonant and nonresonant structures, has been developed to represent the entire SPJ. This has been used to predict the theoretical response as well as to investigate the effect of the couplers on the performance of the SPJ. A demonstrator has been designed to work at 10 GHz with a bandwidth of 0.4 GHz. Stub-loaded waveguide resonators have been used to keep a consistent profile and ease the layout of the complicated waveguide network. A good agreement between the CM-based theoretical responses, simulations, and measurement has been achieved. The measured average insertion loss is 0.4 dB, and the maximum in-band phase error is 10°. The measured in-band isolation between two input ports is higher than 26 dB.",

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AU - Chen, Xun

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AU - Skaik, Talal

AU - Zhang, Qingfeng

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N2 - A novel E-plane filtering six-port junction (SPJ) based on waveguide is presented. Different from the traditional designs, the proposed SPJ is formed by two identical filtering 180° couplers and two waveguide couplers with 180° and 90° phase shifts. A coupling-matrix (CM) technique, combining both resonant and nonresonant structures, has been developed to represent the entire SPJ. This has been used to predict the theoretical response as well as to investigate the effect of the couplers on the performance of the SPJ. A demonstrator has been designed to work at 10 GHz with a bandwidth of 0.4 GHz. Stub-loaded waveguide resonators have been used to keep a consistent profile and ease the layout of the complicated waveguide network. A good agreement between the CM-based theoretical responses, simulations, and measurement has been achieved. The measured average insertion loss is 0.4 dB, and the maximum in-band phase error is 10°. The measured in-band isolation between two input ports is higher than 26 dB.

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E-plane waveguide filtering six-port junction

Abstract

Keywords

ASJC Scopus subject areas

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10 MHz to 1.1 THz Vector Network Analyser

Cite this