Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I: rectangular-to-circular coupling methods

Jason R. Garner; Liang Zhang; Craig R. Donaldson; Adrian W. Cross; Wenlong He

doi:10.1109/TED.2015.2501028

Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I: rectangular-to-circular coupling methods

Jason R. Garner, Liang Zhang, Craig R. Donaldson, Adrian W. Cross, Wenlong He

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

34 Citations (Scopus)

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Abstract

The design of two fundamental mode rectangular-to-circular waveguide input couplers for a low-terahertz gyrotron-traveling wave amplifier (gyro-TWA) is presented. A T-junction input coupler with a Bragg reflector and a multiple-hole directional coupler were optimized for operation between 360 and 384 GHz, the proposed gyro-TWA bandwidth. The T-junction coupler and the multiple-hole coupler achieved the respective bandwidths of 10% and 35%. The benefits and potential limitations of the low-terahertz wave coupler topologies are discussed alongside the challenging manufacturing methods of the submillimeter-wave components.

Original language	English
Pages (from-to)	497-503
Number of pages	7
Journal	IEEE Transactions on Electron Devices
Volume	63
Issue number	1
Early online date	26 Nov 2015
DOIs	https://doi.org/10.1109/TED.2015.2501028
Publication status	Published - 31 Jan 2016

Keywords

gyrotron-traveling wave amplifier (gyro-TWA)
mode coupling
terahertz input coupler
waveguide coupler

Access to Document

10.1109/TED.2015.2501028

Garner-etal-IEEE-TED-2015-Design-study-of-a-fundamental-mode-input-coupler-for-aAccepted author manuscript, 3.07 MB

Gyrotron Travelling Wave Amplifier for high field Electron Paramagnetic Resonance
Cross, A., He, W. & Ronald, K.
EPSRC (Engineering and Physical Sciences Research Council)
1/06/13 → 30/11/16
Project: Research
Epsrc Doctoral Training Grant | Garner, Jason
Cross, A., He, W. & Garner, J.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/12 → 23/02/18
Project: Research Studentship - Internally Allocated

Cite this

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title = "Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I: rectangular-to-circular coupling methods",

abstract = "The design of two fundamental mode rectangular-to-circular waveguide input couplers for a low-terahertz gyrotron-traveling wave amplifier (gyro-TWA) is presented. A T-junction input coupler with a Bragg reflector and a multiple-hole directional coupler were optimized for operation between 360 and 384 GHz, the proposed gyro-TWA bandwidth. The T-junction coupler and the multiple-hole coupler achieved the respective bandwidths of 10% and 35%. The benefits and potential limitations of the low-terahertz wave coupler topologies are discussed alongside the challenging manufacturing methods of the submillimeter-wave components.",

keywords = "gyrotron-traveling wave amplifier (gyro-TWA), mode coupling, terahertz input coupler, waveguide coupler",

author = "Garner, {Jason R.} and Liang Zhang and Donaldson, {Craig R.} and Cross, {Adrian W.} and Wenlong He",

note = "(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",

year = "2016",

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doi = "10.1109/TED.2015.2501028",

language = "English",

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pages = "497--503",

journal = "IEEE Transactions on Electron Devices",

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AU - Garner, Jason R.

AU - Zhang, Liang

AU - Donaldson, Craig R.

AU - Cross, Adrian W.

AU - He, Wenlong

N1 - (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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Y1 - 2016/1/31

N2 - The design of two fundamental mode rectangular-to-circular waveguide input couplers for a low-terahertz gyrotron-traveling wave amplifier (gyro-TWA) is presented. A T-junction input coupler with a Bragg reflector and a multiple-hole directional coupler were optimized for operation between 360 and 384 GHz, the proposed gyro-TWA bandwidth. The T-junction coupler and the multiple-hole coupler achieved the respective bandwidths of 10% and 35%. The benefits and potential limitations of the low-terahertz wave coupler topologies are discussed alongside the challenging manufacturing methods of the submillimeter-wave components.

AB - The design of two fundamental mode rectangular-to-circular waveguide input couplers for a low-terahertz gyrotron-traveling wave amplifier (gyro-TWA) is presented. A T-junction input coupler with a Bragg reflector and a multiple-hole directional coupler were optimized for operation between 360 and 384 GHz, the proposed gyro-TWA bandwidth. The T-junction coupler and the multiple-hole coupler achieved the respective bandwidths of 10% and 35%. The benefits and potential limitations of the low-terahertz wave coupler topologies are discussed alongside the challenging manufacturing methods of the submillimeter-wave components.

KW - gyrotron-traveling wave amplifier (gyro-TWA)

KW - mode coupling

KW - terahertz input coupler

KW - waveguide coupler

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DO - 10.1109/TED.2015.2501028

M3 - Article

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JO - IEEE Transactions on Electron Devices

JF - IEEE Transactions on Electron Devices

IS - 1

ER -

Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I: rectangular-to-circular coupling methods

Abstract

Keywords

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Projects

Gyrotron Travelling Wave Amplifier for high field Electron Paramagnetic Resonance

Epsrc Doctoral Training Grant | Garner, Jason

Cite this