Advancements and Applications of Millimeter Wave and Terahertz Vacuum Electronic Devices

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microelectronics".

Deadline for manuscript submissions: 15 November 2024 | Viewed by 964

Special Issue Editors


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Guest Editor
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Interests: MMW/THz devices
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: devices; systems and methods for millimeter wave and terahetz applications

Special Issue Information

Dear Colleagues,

Recently, numerous technological breakthroughs have been achieved in millimeter wave and terahertz components, sources, detectors, sensors, and related applications. Millimeter wave and terahertz technologies have been brought from laboratory demonstrations to industrial applications, such as non-destructive inspection and testing, security scanning, electromagnetic biology effect, medical imaging, disease diagnostics, recognition of protein structural states, measurement techniques for materials science and characterization, monitoring of ultrafast dynamics, short-range communications, etc. In order to support more emerging applications, efforts are being made around the world to continuously develop technologies, with a focus on radiation sources, detectors, sensors, imaging arrays, spectrometers, system integrations, and so on.

Therefore, this Special Issue aims to collect original research and review articles focused on the latest research advances, applications, and new challenges in the field of millimeter wave and terahertz radiation sources, detectors, sensors, and imaging. We encourage authors to submit original manuscripts, focusing on the topics listed in the following keywords.

(1) new technologies using millimeter and terahertz waves for sensing and imaging;

(2) millimeter and terahertz non-destructive testing (NDT);

(3) terahertz and millimeter wave technology for materials research;

(4) terahertz and millimeter wave measurement systems;

(5) terahertz sources, detectors, and sensors.

Prof. Dr. Yubin Gong
Prof. Dr. Zhigang Lu
Guest Editors

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Keywords

  • new technologies using millimeter and terahertz waves for sensing and imaging
  • millimeter and terahertz non-destructive testing (NDT)
  • terahertz and millimeter wave technology for materials research
  • terahertz and millimeter wave measurement systems
  • terahertz sources, detectors, and sensors
 

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Published Papers (1 paper)

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Research

9 pages, 4772 KiB  
Article
Experimental 35 GHz Gyrotron Efficiency Enhancement with Magnetic Field Taper in Fundamental Harmonic
by Sergey Shevchenko, Yarden Shay, Moritz Pilossof and Moshe Einat
Electronics 2024, 13(14), 2737; https://doi.org/10.3390/electronics13142737 - 12 Jul 2024
Viewed by 663
Abstract
This paper presents an experimental setup of magnetic field taper variations to optimize the efficiency of a Ka-band pulsed gyrotron. Experimental optimization of the gyrotron’s efficiency is presented. The efficiency dependence on three input parameters—beam current, magnetic field amplitude, and variations in the [...] Read more.
This paper presents an experimental setup of magnetic field taper variations to optimize the efficiency of a Ka-band pulsed gyrotron. Experimental optimization of the gyrotron’s efficiency is presented. The efficiency dependence on three input parameters—beam current, magnetic field amplitude, and variations in the magnetic field taper profile—is studied. A gyrotron electron efficiency improvement from 25.4% for a non-tapered magnetic curve to 36.4% for a tapered magnetic curve is measured. The stability of the millimeter wave excitation in the cavity is also affected by the magnetic taper gradient. The magnetic taper is obtained by a practical modification of the solenoid that leads to an 11% electron efficiency improvement. Magnetic tapering can be combined with other types of efficiency enhancement concepts to obtain an overall improved efficiency that can be important for industrial applications. Full article
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