Grating-Groove-Ladder Slow Wave Structure for W-Band Traveling Wave Tube

被引：0
作者：
Duan, Jingrui [1 ]
Lu, Zhigang [1 ,2 ]
Gao, Peng [1 ,3 ]
Wang, Zechuan [1 ]
Zheng, Yuan [1 ]
Wang, Zhanliang [1 ]
Wang, Shaomeng [1 ]
Gong, Huarong [1 ]
Duan, Zhaoyun [1 ]
Gong, Yubin [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Natl Key Lab Sci & Technol Vacuum Elect, Chengdu 611731, Peoples R China
[2] Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313001, Zhejiang, Peoples R China
[3] Univ Elect Sci & Technol China, Sch Resources & Environm, Chengdu 610054, Peoples R China
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2024年
基金：
中国国家自然科学基金;
关键词：
Bandwidth; Gratings; Dispersion; Solid modeling; Passband; Impedance; Synchronization; Grating-controlled units; ladder circuit; slow wave structure (SWS); traveling wave tube (TWT); wide bandwidth;
D O I：
10.1109/TPS.2024.3391328
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A new slow wave structure (SWS) named grating-groove-ladder (GGL) is proposed to extend the bandwidth of a conventional ladder (CL). Through the special arrangements of the grating-controlled EM modulation unit on the cover plate, the high-frequency characteristics of GGL-SWS have exhibited a wider bandwidth, good interaction impedance, and lower ohmic losses. Numerical calculations of beam-wave interactions confirm the good amplification performance of the GGL-TWT. The effectiveness of the GGL-TWT in extending the bandwidth is accompanied by a reduction in gain. The cold-test transmission characteristics of the GGL-SWS have demonstrated a good agreement with simulations in W -band. The fabricated GGL-SWS has also been proven to have good fabrication accuracy through morphology and surface roughness characterization. Therefore, GGL provides a viable solution for extending the bandwidth of CL.
引用
收藏
页码：5010 / 5016
页数：7
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