Recent Advances in High-Power Gyro-Devices: Design, Optimization, Manufacturing, and Control

Dear Colleagues,

High-power gyro-devices, a class of vacuum electron devices leveraging the cyclotron resonance maser instability, are pivotal in advancing modern scientific and industrial applications. These devices generate coherent electromagnetic radiation at millimeter and sub-terahertz frequencies, enabling breakthroughs in fusion plasma heating, high-resolution radar, particle accelerators, and advanced materials processing. Their ability to deliver unparalleled power levels at high frequencies positions them as critical tools in addressing global challenges, such as sustainable energy through nuclear fusion and next-generation defense systems. Despite their transformative potential, challenges persist in optimizing bandwidth and efficiency, ensuring operational stability, managing thermal loads, and achieving precision in manufacturing. Addressing these barriers requires interdisciplinary innovation, spanning physics, materials science, and control engineering, to unlock new frontiers in high-power electronics.

This Special Issue in Electronics (ISSN 2079-9292) seeks to compile cutting-edge research and reviews on the development and application of high-power gyro-devices. Aligning with the journal’s focus on electronics science, engineering, and emerging technologies, this Special Issue will highlight advancements in device design, computational modeling, manufacturing techniques, and intelligent control systems. By fostering interdisciplinary dialogue, we aim to accelerate progress in overcoming technical limitations and expanding the utility of gyro-devices across sectors such as telecommunications, medical imaging, and industrial processing. Contributions will not only advance fundamental understanding but also bridge theoretical insights with practical implementations, reinforcing the commitment of Electronics to disseminating impactful, application-driven research.

We invite original research articles and comprehensive reviews addressing, but not limited to, the following themes:

• Design and Simulation: Novel gyrotron, gyroklystron, and gyro-TWA configurations, and advanced computational models for mode interaction and beam-wave dynamics.
• Performance Optimization: Efficiency enhancement, bandwidth broadening, and stability improvements in high-power regimes.
• Manufacturing Innovations: Precision fabrication techniques, additive manufacturing, and cooling solutions for thermal management.
• Control Systems: AI/ML-driven diagnostics, real-time monitoring, and adaptive control algorithms for operational reliability.
• Materials and Components: High-performance cathodes, RF window materials, and magnetic systems for compact designs.
• Emerging Applications: Fusion energy, directed-energy systems, spectroscopy, and space communications.
• Review Articles: Critical assessments of state-of-the-art technologies and future directions.

We look forward to receiving your contributions.

Dr. Yelei Yao
Dr. Wei Jiang
Guest Editors

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• vacuum electronic devices
• high-power microwave
• gyrotron
• gyroklystron
• gyro-TWA
• particle-in-cell simulation
• experiment
• fabrication