Broadband Continuous Frequency Tuning in a Terahertz Gyrotron With   Tapered Cavity

doi:10.1109/TED.2015.2493563

CORC > 北京大学 > 信息科学技术学院

	Broadband Continuous Frequency Tuning in a Terahertz Gyrotron With Tapered Cavity
	Qi, Xiang-Bo ; Du, Chao-Hai ; Liu, Pu-Kun
刊名	IEEE TRANSACTIONS ON ELECTRON DEVICES
	2015
关键词	Broadband continuous frequency tuning (CFT) gyrotron tapered cavity terahertz DYNAMIC NUCLEAR-POLARIZATION BACKWARD-WAVE OSCILLATORS 150 GHZ GYROTRON HIGH-POWER TUNABLE GYROTRON DESIGN GUIDE MODE RESONATORS OPERATION
DOI	10.1109/TED.2015.2493563
英文摘要	Broadband continuous frequency tuning (CFT) in a terahertz gyrotron is promising for advanced terahertz applications. However, it is challenging to realize broadband CFT in a conventional open cavity, because a long cavity is helpful to expand the bandwidth but is generally difficult to suppress the high Q-factor gyromonotron competition. In this paper, a tapered cavity with a long effective interaction length is proposed to expand the CFT bandwidth. The tapered circuit can reduce the Q-factor of the first-order axial mode and accordingly suppress the gyromonotron competition. By selecting a reasonable Q-factor cavity, a gyrotron could generate effective radiation sequentially under gyromonotron and gyrobackward-wave oscillator (BWO) states during the magnetic field tuning. In gyromonotron range, the bandwidth is expanded because of the cutoff frequency shifting. On the other hand, in gyro-BWO range, the bandwidth is expanded because of the axial mode transition. The CFT bandwidth of 4 GHz is realized in a tapered 330-GHz TE12,4 mode low-voltage gyrotron. The principle is important for developing broadband CFT terahertz gyrotrons.; Seeding Grant for Medicine and Information Sciences of Peking University [2014-MI-01]; National Natural Science Foundation of China [11275206, 61471007, 61522101, 61531002]; SCI(E); EI; ARTICLE; duchao-hai@pku.edu.cn; pkliu@pku.edu.cn; 12; 4272-4278; 62
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435669]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Qi, Xiang-Bo,Du, Chao-Hai,Liu, Pu-Kun. Broadband Continuous Frequency Tuning in a Terahertz Gyrotron With Tapered Cavity[J]. IEEE TRANSACTIONS ON ELECTRON DEVICES,2015.
APA	Qi, Xiang-Bo,Du, Chao-Hai,&Liu, Pu-Kun.(2015).Broadband Continuous Frequency Tuning in a Terahertz Gyrotron With Tapered Cavity.IEEE TRANSACTIONS ON ELECTRON DEVICES.
MLA	Qi, Xiang-Bo,et al."Broadband Continuous Frequency Tuning in a Terahertz Gyrotron With Tapered Cavity".IEEE TRANSACTIONS ON ELECTRON DEVICES (2015).