340 GHz菱形曲折波导慢波结构  

340 GHz folded diamond shaped waveguide slow-wave structure

作　　者：郭靖宇 师凝洁 王禾欣 董洋[1] 王战亮[1] 路志刚[1] 段兆云[1] 巩华荣[1] 宫玉彬[1] 王少萌[1] GUO Jing-Yu;SHI Ning-Jie;WANG He-Xin;DONG Yang;WANG Zhan-Liang;LU Zhi-Gang;DUAN Zhao-Yun;GONG Hua-Rong;GONG Yu-Bin;WANG Shao-Meng(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都610054

出　　处：《红外与毫米波学报》2021年第4期483-489,共7页Journal of Infrared and Millimeter Waves

基　　金：Supported by National Natural Science Foundation of China(61921002,61531010)。

摘　　要：提出并研究了一种菱形曲折波导慢波结构。与传统的矩形曲折波导慢波结构相比,菱形曲折波导慢波结构在相同频带下拥有更大的尺寸,在相同尺寸下拥有更宽的带宽。同时提出了适用于这种慢波结构的输入-输出过渡结构和衰减器。在此基础上,设计了一种用于行波管的340 GHz菱形曲折波导慢波结构,并采用相速负跳变技术提高了其增益。模拟仿真结果表明,在加载电压为15.3 kV,电流为35 mA的圆形电子注的情况下,行波管在343 GHz的输出功率和增益分别达到8 W和33 dB,其3-dB带宽范围为330∼348 GHz。A folded diamond shaped waveguide slow wave structure(SWS)is proposed and investigated in this paper.Compared with the conventional folded rectangular waveguide SWS,the folded diamond shaped wave⁃guide SWS is larger with the same frequency band,and the bandwidth is broader with the same dimension.The input-output waveguide transition structure and attenuator appropriate for this kind of SWS are put forward.Based on the proposed folded diamond shaped waveguide(FDSWG)SWS,we designed the whole SWS for a 340 GHz traveling wave tube(TWT),in which the negative phase-velocity tapering technique is adopted to improve the gain.The particle-in-cell results show that its output power and gain at 343 GHz can reach 8 w and 33 dB,respec⁃tively.Its 3-dB bandwidth is from 330 GHz to 348 GHz,with a circular electron beam of 15.3 kV and 35 mA.

关 键 词：菱形曲折波导 慢波结构 相速负跳变 3-dB带宽 

分 类 号：TN124[电子电信—物理电子学]