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GLVAC Research Institute published an article in IEEE Grade-A journal

2026/03/20

Recently, the team of Li Yongming, Wang Shaozhe, and Zou Jianjun from Kunshan GLVAC Industrial Technology Research Institute of High Power Devices (hereinafter referred to as the GLVAC Research Institute), in collaboration with Professor Duan Zhaoyun’s team from the School of Electronic Science and Engineering, University of Electronic Science and Technology of China, and the Institute of High Energy Physics of the Chinese Academy of Sciences, jointly published a research article titled “Experimental Demonstration of an MW-Level P-Band Metamaterial-Inspired Klystron” in IEEE Transactions on Electron Devices. This article experimentally validates the world’s first compact P-band (324 MHz) MW-level metamaterial-inspired klystron.

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Through this collaboration, the research teams successfully developed a 324 MHz metamaterial klystron by loading metamaterials into resonant cavities. This innovation achieved a significant technological breakthrough: halving the device volume while simultaneously improving both output power and efficiency. The design notably reduced the transverse dimensions of the resonant cavities. Experimentally, the klystron generated a saturated peak output power exceeding 3 MW within the frequency range of 323.4 MHz to 324.3 MHz, with an electronic saturation efficiency surpassing 53.1% and a saturated gain exceeding 49 dB.

This miniaturized, high-power, and high-efficiency klystron demonstrates immense application potential in future large-scale scientific facilities, radar systems, communications, medical imaging (such as proton therapy equipment), industrial irradiation, and microwave heating. Furthermore, this technology already meets the requirements for the linear accelerator of the next-generation China Spallation Neutron Source (CSNS).

Looking ahead, the team will continue to tackle key challenges and deepen the research and development of metamaterial vacuum electronic devices. 


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