W波段宽带带状注行波管超短高频结构设计  

Design of an ultrashort high frequency structure for wideband sheet-beam TWT at W-band

作　　者：郭铮 张长青 蔡军[1,2] 冯进军[1,2] GUO Zheng;ZHANG Changqing;CAI Jun;FENG Jinjun(Beijing Vacuum Electronic Research Institute,China Electronics Technology Group Corporation,Beijing 100015,China;National Key Laboratory of Science and Technology on Vacuum Electrionc,China Electronics Technology Group Corporation,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第十二研究所,北京100015 [2]中国电子科技集团公司微波电真空器件国家重点实验室,北京100015

出　　处：《太赫兹科学与电子信息学报》2025年第4期360-365,375,共7页Journal of Terahertz Science and Electronic Information Technology

摘　　要：基于超短H面耦合器和切断结构,将一个W波段周期会切磁场(PCM)聚焦的宽带带状注行波管的高频结构缩短了27.7 mm,使其在13 GHz带宽内(90~103 GHz)可以产生超过200 W的功率。并对超短切断结构中的注波互作用进行了研究。研究表明,在第一段慢波电路足够长时,超短切断结构可以缓解行波管切断处群聚电子的发散程度,从而大幅提升行波管的输出功率和带宽。因此,在设计大带宽行波管时,应当避免出现长切断结构、大输入信号电压和低电子枪电压。Based on an ultrashort H-plane coupler and a cut-off structure,a high frequency structure of a W-band Periodically Cusped-Magnetic(PCM)field focused wideband sheet-beam Traveling-Wave Tube(TWT)is shortened by 27.7 mm.This approach allows the TWT to generate more than 200 W of power within a bandwidth of 13 GHz(90~103 GHz).The interaction between the electron beam and microwave in the ultrashort cut-off structure is investigated.The study shows that the ultrashort cut-off structure can mitigate the divergence of bunched electrons at the cut off structure when the first section of the Slow-Wave Structure(SWS)is long enough,thereby significantly enhancing the output power and bandwidth of the TWT.Therefore,long cut-off structures,high input signal voltages,and low electron gun voltages should be avoided when a wideband TWT is designed.

关 键 词：带状注行波管 切断结构 耦合器 注波互作用 W波段 周期会切磁场 

分 类 号：TN752[电子电信—电路与系统]