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Electronics
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Broadband High-Power Millimeter-Wave and Terahertz Devices
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Broadband High-Power Millimeter-Wave and Terahertz Devices

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 1164

Special Issue Editors

Dr. Zewei Wu

E-Mail Website
Guest Editor
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: microwave/millimeter wave/terahertz wave antenna theory and technology; microwave/millimeter wave quasi-optical transmission and emission technology; high-power millimeter wave system and application
Dr. Fan Wu

E-Mail Website
Guest Editor
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Interests: engaged in the theory and technology of broadband, high-gain, reconfigurable, circularly polarized antennas for applications such as 5G and other next-generation wireless communications, satellite communications, millimeter-wave terminals, electromagnetic functional surfaces, and compact field testing systems
Special Issues, Collections and Topics in MDPI journals
Dr. Song Li

E-Mail Website
Guest Editor
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410072, China
Interests: engaged in the theory and technology of pulsed power devices and its applications on high-power microwave/millimeter wave sources; insulations and high voltage pulse generation

Special Issue Information

Dear Colleagues,

Broadband high-power millimeter-wave and terahertz (THz) technologies have found extensive applications across various fields, including deep-space and specialized satellite communications, high-resolution Doppler radar, radar ranging and imaging in atmospheric and planetary sciences, the remote detection of concealed radioactive materials, and submillimeter-wave and THz spectroscopy, as well as material processing, analysis, and biological effects. In response to increasing demand, significant advancements have been made in recent years in broadband high-power millimeter-wave and THz technologies, covering power sources, devices, and systems.

This Special Issue will highlight recent advancements in the analysis, design, and application of broadband high-power millimeter-wave and terahertz technologies. Possible topics include, but are not limited to, the following:

  • Electromagnetic field theory;
  • Electromagnetic modeling;
  • Inverse design and AI in broadband high-power millimeter-wave/THz design;
  • Multi-physics simulation and analysis;
  • The rapid analysis and computation of large electronic dimensions;
  • Broadband high-power millimeter-wave/THz waveguide components and transmission lines;
  • High-power millimeter-wave/THz quasi-optical technology;
  • Broadband high-power millimeter-wave/THz antennas/arrays;
  • Broadband high-power millimeter-wave/THz metamaterials/metasurfaces;
  • High-power millimeter-wave/THz sources, devices, and systems;
  • High-power millimeter-wave and THz materials (e.g., dielectrics, coatings, and magnetic materials);
  • High-power millimeter-wave/THz breakdown;
  • High-power millimeter-wave/THz measurement techniques;
  • Thermal power management and control;
  • High-power millimeter-wave/THz power modules;
  • High-power millimeter-wave/THz electronic power conditioners, modulators, and supplies;
  • High-power millimeter-wave/THz device and system integration;
  • High-power millimeter-wave/THz system (radars, communications, and counteraction);
  • High-power millimeter-wave/THz system and subsystem reliability;
  • High-power millimeter-wave/THz sensing;
  • High-power millimeter-wave/THz devices in biology and medicine.

Dr. Zewei Wu
Dr. Fan Wu
Dr. Song Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • high-power millimeter-wave/THz devices
  • broadband performance
  • oversized waveguide
  • high-power pulse generation
  • low-loss transmission
  • millimeter-wave and THz devices
  • quasi-optical techniques
  • high stability
  • thermal management breakdown

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Published Papers (3 papers)

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Research

13 pages, 2636 KiB  
Article
Broadband Directional Coupler Based on Deformed Circular Waveguide for High-Power Application
by Minxing Wang, Xiaoyi Liao, Peng Liu, Zhipeng Li and Wenjie Li
Electronics 2025, 14(13), 2652; https://doi.org/10.3390/electronics14132652 - 30 Jun 2025
Abstract
A broadband oversized circular waveguide directional coupler for high-power applications is proposed in this paper. The coupler is composed of a group of crossed waveguides, including an oversized quasi-circular main waveguide and a rectangular branch waveguide. Angular deformation is introduced into the main [...] Read more.
A broadband oversized circular waveguide directional coupler for high-power applications is proposed in this paper. The coupler is composed of a group of crossed waveguides, including an oversized quasi-circular main waveguide and a rectangular branch waveguide. Angular deformation is introduced into the main waveguide to realize the compact cross-guide structure, which also contributes to an appropriate coupling degree and high directivity in a broad bandwidth. Moreover, the deformation increases the polarization discrimination ability of the coupler as well, making it feasible in a circularly polarized transmission system. The coupler is designed in the Ku band, of which simulation results indicate a directivity over 23.5 dB in the wide frequency range of 10 GHz to 16 GHz, corresponding to a fractional bandwidth of 46.2%. The impact of parasitic modes on the directional coupler is analyzed to comprehensively survey its performance in oversized waveguide transmission lines. For verification purposes, a prototype of the coupler is fabricated and measured. The experimental results show that a directivity over 22 dB is achieved within the bandwidth, and the coupling degree is around −46.7 dB with fluctuation under 0.9 dB. This paper provides an efficient design and analysis method to develop compact and broadband high-power directional couplers. Full article
(This article belongs to the Special Issue Broadband High-Power Millimeter-Wave and Terahertz Devices)
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12 pages, 8325 KiB  
Article
Co-Design of Single-Layer RCS-Reducing Surface and Antenna Array Based on AMC Technique
by Rongyu Yang, Xiaoyi Liao, Yujie Wang, Xiangcheng Qian, Minxing Wang, Hongfei Zhang and Xiaoxing Fang
Electronics 2025, 14(12), 2392; https://doi.org/10.3390/electronics14122392 - 11 Jun 2025
Viewed by 264
Abstract
A co-design of radar cross section (RCS) reducing surface and array antenna on a single-layer printed board is presented in this paper. To achieve this goal, two kinds of artificial magnetic conductors (AMCs) are designed and optimized. The first kind of AMC shares [...] Read more.
A co-design of radar cross section (RCS) reducing surface and array antenna on a single-layer printed board is presented in this paper. To achieve this goal, two kinds of artificial magnetic conductors (AMCs) are designed and optimized. The first kind of AMC shares the same geometry with the array element and thus is simultaneously used as the array element. The other kind of AMC generates opposed-phased reflections for a normal incident wave, and when they are in a checkerboard configuration, the RCS is reduced via phase cancellation of opposed-phased reflections. In the range of 10 GHz to 16 GHz, the designed bi-functional surface achieves an 8 dB decline in monostatic RCS, while the array antenna obtains a gain of 15 dBi, a side-lobe less than −10 dB, and a cross-polarization less than −20 dB at 13.5 GHz. To validate the calculation results, a prototype is fabricated and measured. To feed the array antenna, a T-type power divider network is etched under the ground and the array is fed via coupling slots on the ground. The measured results agree with the simulation results. Full article
(This article belongs to the Special Issue Broadband High-Power Millimeter-Wave and Terahertz Devices)
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10 pages, 7470 KiB  
Article
Theoretical Design and Simulation of a Dual-Band Sheet Beam Extended Interaction Oscillator
by Jialang Ling, Xiaofeng Li, Qixiang Zhao, Ruiqi Lu, Xingpeng Liu and Shaoliang Shi
Electronics 2025, 14(5), 966; https://doi.org/10.3390/electronics14050966 - 28 Feb 2025
Viewed by 448
Abstract
Millimeter-wave devices have great application value and development prospects in military radar, satellite communication, and other fields. Extended interaction devices (EIDs) are widely used in various fields because of their small size, light weight, large bandwidth, and high output power, which are of [...] Read more.
Millimeter-wave devices have great application value and development prospects in military radar, satellite communication, and other fields. Extended interaction devices (EIDs) are widely used in various fields because of their small size, light weight, large bandwidth, and high output power, which are of great significance to the research of millimeter-wave sources. This article presents the design of a sheet beam, dual-beam, dual-cavity coupled extended interaction oscillator (EIO) that can operate separately at 94 GHz and 140 GHz. The coupling coefficient, characteristic impedance, and other parameters were analyzed to optimize the cavity structure and improve transmission performance. The results of the 3D particle-in-cell (PIC) simulation demonstrated that the designed EIO reached a peak output power of 6.3 kW and 41 kW, respectively, when driven by sheet electron beams of 3 A, 34 kV and 3 A, 56 kV. Full article
(This article belongs to the Special Issue Broadband High-Power Millimeter-Wave and Terahertz Devices)
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