红外与毫米波学报2021，Vol.40Issue(4)：483-489,7.DOI:10.11972/j.issn.1001-9014.2021.04.007
340 GHz菱形曲折波导慢波结构
340 GHz folded diamond shaped waveguide slow-wave structure
摘要
Abstract
A folded diamond shaped waveguide slow wave structure(SWS)is proposed and investigated in thispaper. 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Key words
folded diamond shaped waveguide/slow wave structure/negative phase-velocity tapering/3-dBbandwidth分类
信息技术与安全科学引用本文复制引用
郭靖宇,王少萌,师凝洁,王禾欣,董洋,王战亮,路志刚,段兆云,巩华荣,宫玉彬..340 GHz菱形曲折波导慢波结构[J].红外与毫米波学报,2021,40(4):483-489,7.基金项目
Supported by National Natural Science Foundation of China(61921002,61531010) （61921002,61531010）
