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 journalArticle

26 Citations (Scopus)

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.
LanguageEnglish
Number of pages7
JournalIEEE Transactions on Electron Devices
Volume63
Issue number1
Early online date26 Nov 2015
DOIs
Publication statusPublished - 31 Jan 2016

Fingerprint

traveling wave amplifiers
couplers
Bragg reflectors
Terahertz waves
Bandwidth
Submillimeter waves
Circular waveguides
Directional couplers
Topology
bandwidth
circular waveguides
submillimeter waves
directional couplers
topology
manufacturing

Keywords

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

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.",
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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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