适用于G波段超构表面行波管的多注电子枪研究  

A Study on the Multi-beam Electron Gun for a G-band Metasurface-based Traveling-wave Tube

作　　者：孙世昭 邹建军 江胜坤 陈旭媛 王战亮[1] 宫玉彬[1] 段兆云[1] SUN Shizhao;ZOU Jianjun;JIANG Shengkun;CHEN Xuyuan;WANG Zhanliang;GONG Yubin;DUAN Zhaoyun(National Key Laboratory of Science and Technology on Vacuum Electronics,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Guoli Vacuum Industrial Technology Research Institute of High Power Devices Co.,Ltd.,Suzhou 215300,China;The 12th Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China;School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]电子科技大学电子科学与工程学院微波电真空器件国家级重点实验室,成都611731 [2]昆山国力大功率器件工业技术研究院有限公司,苏州215300 [3]中国电子科技集团公司第十二研究所,北京100015 [4]江西理工大学电气工程与自动化学院,赣州341000

出　　处：《微波学报》2025年第1期58-62,共5页Journal of Microwaves

基　　金：国家自然科学基金(62131006,62371108,61921002)。

摘　　要：G波段超构表面行波管具有天然的双电子注通道,电子注可以在超构表面两侧传输,和超构表面的局域增强电场进行注波互作用,可提高G波段行波管的输出功率和效率。本文研究了一支适用于G波段超构表面行波管的多注电子枪,其采用八个相同的圆形阴极构成双排阵列,以产生双排多电子注,同时设计了一种三级聚焦极,使双排多电子注聚焦并与电子注通道适配。模拟结果表明,当注电压为24.6 kV、阴极半径为0.15 mm时,总注电流达到173 mA,阴极发射电流密度为30.6 A/cm^(2),射程为13 mm。静态流通模拟结果表明,在0.2 T的均匀磁场聚焦下,电子注在超构表面慢波结构中可以传输70 mm。该研究为G波段超构表面行波管的研究奠定理论基础。The G-band metasurface-based traveling-wave tube(TWT)is inherently equipped with a double electron beam channel,where electron beams can be transported on both sides of the metasurface,and can be interacted with the localized enhanced electric field of the metasurface to improve the output power and efficiency of the G-band TWT.In this paper,a multi-beam electron gun suitable for the G-band metasurface-based TWT is studied,which uses eight identical circular cathodes to form a dual-row array to produce a double-layer multiple electron beam.At the same time,a three-stage focus electrode is designed to form the double-layer multiple electron beam with suitable size for the electron beam channel.The multi-beam electron gun simulation results show that when the beam voltage and the cathode radius are 24.6 kV and 0.15 mm,respectively,the total beam current is 173 mA,the corresponding emission current density is 30.6 A/cm^(2),and the distance between the cathode emitting surface and the beam waist position is 13 mm.The static beam transportation simulation results indicate that under a uniform magnetic field of 0.2 T,the electron beams can be stably transported in the metasurface-based slow-wave structure for 70 mm.This study lays the theoretical foundation for the research of G-band metasurface-based TWTs.

关 键 词：G波段 超构表面行波管 多注电子枪 三级聚焦极 

分 类 号：TN124[电子电信—物理电子学] O462.4[理学—电子物理学]