A staggered double-vane slow-wave structure with double sheet electron beams for 340 GHz traveling wave tube. Issue 12 (13th August 2019)

• Record Type: Journal Article
• Authors: Yang, Jun; Cai, Ke; Deng, Guangsheng; Yin, Zhiping; Ruan, Jiufu; Cai, Fei; Fang, Yong
• Is Part Of: Journal of electromagnetic waves and applications. Volume 33:Issue 12(2019)
• Page Start: 1632
• Page End: 1643
• Publication Date: 2019-08-13
• Subjects: Terahertz -- sheet electron beam -- staggered double-vane slow-wave structure -- traveling wave tube; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2019.1624628
• Languages: English
• ISSNs: 0920-5071

Abstract

ABSTRACT: An improved slow-wave structure (SWS) for a 340 GHz traveling wave tube (TWT) is proposed. The dispersion curve and transmission characteristics of SWS have been calculated and analyzed. The transmission and reflection of the RF structure are S 21 > −7 dB and S 11 < −16 dB, respectively. Two sheet electron beams with identical physical parameters are used to control the operation of a TWT. In addition, the output power, gain, and bandwidth of the TWT were studied using three-dimensional particle-in-cell (PIC) simulation method. A uniform constant magnetic field with the magnetic field density of 0.2 T is used to focus the sheet electron beam. The results of the PIC simulations show that the TWT achieves the maximum output power of 12 W and the 3 dB bandwidth of 25 GHz (328–353 GHz) at the input power of 10 mW. At 340 GHz, the output power of 12 W and the gain of 30.8 dB are obtained.