物理学报Issue(23)：1-10,10.DOI:10.7498/aps.63.238404
0.14 THz基模多注折叠波导行波管的理论与模拟研究∗
Theoretical and simulation study of 0.14 THz fundamental mo de multi-b eam folded waveguide traveling wave tub e
摘要
Abstract
To improve the current and output power of the THz traveling wave tube (TWT), a fundamental mode multi-beam folded waveguide (FMMBFW) TWT scheme is proposed. Firstly, an equivalent circuit model FMMBFW for calculating the high-frequency characteristic is established and compared with numerical simulation. Secondly, the transmission characteristic of 60 periods FMMBFW is analyzed. Finally, the beam-wave interaction characteristic of 0.14 THz FMMBFW TWT is completed by numerical simulation and theoretical calculation. When the DC current is 12 mA and the applied voltage is 15.75 kV, the 3 dB bandwidth of 0.14 THz FMMBFW TWT is 25 GHz (128–153 GHz), the maximum gain is 33.61 dB and the maximum output power is 23 W. When the DC current is 30 mA and the voltage is 15.75 kV, the maximum gain is 38 dB and the maximum pulse output power is 63.1 W at 0.14 THz. Compared with the fundamental single-beam folded waveguide (FW) TWT under the same working condition, the 3 dB bandwidth is doubled, its output power is raised by a factor of 9.66 and the interaction efficiency is increased by 3.22 times. Based on the same gain, the length of FMMBFW TWT is just 52.6 mm while the length of single beam FW-TWT is 78.2 mm. The proposed method can increase effectively the current of FMMBFW TWT;and the interaction gain, efficiency, 3 dB bandwidth, output power can be improved. When the gain is the same, a shorted and compact FMMBFW TWT can be constucuted.关键词
基模/多注/折叠波导/THz行波管Key words
fundamental mode/multi-beam/folded waveguide/THz traveling wave tube引用本文复制引用
颜胜美,苏伟,王亚军,徐翱,陈樟,金大志,向伟..0.14 THz基模多注折叠波导行波管的理论与模拟研究∗[J].物理学报,2014,(23):1-10,10.基金项目
中国工程物理研究院超精密加工技术重点实验室开放基金(批准号:2012CJMZZ00007)资助的课题.* Project supported by the Open Foundation of the Key Laboratory of Precision Manufacturing Technology of China Academy of Engineering Physics (Grant No.2012CJMZZ00007) （批准号:2012CJMZZ00007）
