A New Fabrication Method for Serpentine-Folded Waveguide Slow Wave Structure at W -Band

Panigrahi, R and Joy Thomas, M and Vinoy, KJ (2020) A New Fabrication Method for Serpentine-Folded Waveguide Slow Wave Structure at W -Band. In: IEEE Transactions on Electron Devices, 67 (3). pp. 1198-1204.

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Abstract

A serpentine-folded waveguide traveling-wave tube (FWTWT) in W -band was fabricated using chemical machining to pattern 200- μ m -thick copper sheets. These were stacked together inside a jig to form the final device. The challenge in realizing a beam hole for electron beam/wave interaction at millimeter wavelengths was addressed by incorporating a circular beam hole realized using stepped chemical machining. The surface characteristics were improved using chemical polishing. This surface was characterized using a scanning electron microscope images and surface roughness measurements. To improve the conductivity further, gold plating with a thickness of 1-2 μ m was applied. The fabricated circuit was tested and the cold-test parameters were found to be satisfactory. © 1963-2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Transactions on Electron Devices
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Chemical polishing; Fabrication; Millimeter waves; Scanning electron microscopy; Serpentine; Surface roughness; Waveguides, Fabrication method; Folded waveguide traveling wave tubes; Folded waveguides; Millimeter wavelength; Photochemical machining; Scanning electrons; Surface characteristics; W bands, Slow wave structures
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Division of Electrical Sciences > Electrical Engineering Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	23 Jun 2020 11:00
Last Modified:	23 Jun 2020 11:00
URI:	http://eprints.iisc.ac.in/id/eprint/64863

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