BROWSE

Related Researcher

Author's Photo

Choi, EunMi
THz Vacuum Electronics and Electrodynamics
Research Interests
  • High power millimeter-wave/THz wave, vacuum electronics, plasma breakdown, electron beams, electromagnetics, microwave/RF engineering

ITEM VIEW & DOWNLOAD

Microscopic Analyses of Electrical Conductivity of Micromachined-Folded Waveguides Based on Surface Roughness Measurement for Terahertz Vacuum Electron Devices

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Microscopic Analyses of Electrical Conductivity of Micromachined-Folded Waveguides Based on Surface Roughness Measurement for Terahertz Vacuum Electron Devices
Author
Lee, IngeunChoi, WonjinShin, JinwooChoi, EunMi
Issue Date
2018-11
Publisher
Institute of Electrical and Electronics Engineers
Citation
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, v.8, no.6, pp.710 - 718
Abstract
Manufacturing slow-wave vacuum electron device (VED) components operating in a terahertz (THz) region required the use of proper techniques and detailed plans. Moreover, how to fabricate components and evaluate manufactured ones are essential in identifying defects, checking their performance, and finding what needs to be improved. This study introduces estimated conductivity based on the surface roughness and evaluations of fabricated folded waveguides (FWGs), which is one of the THz slow-wave VED components, using nanoscale precision computer numerical control (nano-CNC) machining. Produced circuits operating in the G-band (0.11-0.3 THz) and Y-band (0.325-0.5 THz) were diagnosed in terms of the RF transmission loss, achievable surface roughness, tolerance, and flatness. During testing, our devices exhibited the highest reported Ra (arithmetic mean surface roughness) at less than 11.17 nm in the Y-band. The conductivities based on the measured surface roughness were estimated in the G-band and the Y-band. Through a simulation and an experiment, we analyzed the reasons for the losses caused by the reduced electrical conductivity. The main contribution of this study is the demonstration of an achievable conductivity of the THz FWGs fabricated with nano-CNC machining and an improved surface finishing capability of the fabrication technique using lubricants.
URI
https://scholarworks.unist.ac.kr/handle/201301/25303
URL
https://ieeexplore.ieee.org/document/8477140
DOI
10.1109/TTHZ.2018.2873146
ISSN
2156-342X
Appears in Collections:
EE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU