An ultra-broadband watt-level terahertz BWO based upon novel sine shape ridge waveguide. (12th May 2016)

• Record Type: Journal Article
• Authors: Luqi, Zhang; Yanyu, Wei; Guo, Guo; Jin, Xu; Wanghe, Wei; Yuanyuan, Wang; Chong, Ding; Xuebing, Jiang; Guoqing, Zhao; Yubin, Gong; Wenxiang, Wang; Gun-Sik, Park
• Is Part Of: Journal of physics. Volume 49:Number 23(2016)
• Publication Date: 2016-05-12
• Subjects: terahertz radiation source -- back-wave oscillator -- electron–plasmon coupling -- novel slow wave structure -- vacuum electronic devices -- ultra-broadband -- high power; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/49/23/235102
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: A novel sine-shape ridge waveguide (SSRWG) is put forward to develop the ultra-broadband high power terahertz (THz) backward-wave oscillator (BWO). It is found that this kind of slow-wave structure (SWS) possesses very wide 'cold' bandwidth and quite low transmission losses from the analyses of the electromagnetic characteristics. Moreover, the beam-wave interaction results indicate that the BWO based upon the SSRWG SWS can produce the output power exceeding 0.625 W in the frequency range from 0.617 THz to 0.99 THz. In particular, the output power at the typical operating frequency of 0.853 THz can reach 1.186 W by using the sheet electron beam of 16 kV and 8 mA. Therefore, this device has great potential to be an ultra-broadband watt-level THz radiation source.