强激光与粒子束2024，Vol.36Issue(12)：63-68,6.DOI:10.11884/HPLPB202436.240007
太赫兹折叠波导慢波电路及功率合成技术
Slow-wave circuits and power synthesis techniques of folded waveguides for terahertz applications
向怀鑫 1缪旻 1李振松 1边兴旺2
作者信息
- 1. 北京信息科技大学信息产业部信息与通信系统重点实验室,北京 100101||北京信息科技大学智能芯片与网络研究中心,北京 100101||北京信息科技大学光电测试技术及仪器教育部重点实验室,北京 100101
- 2. 北京真空电子技术研究所微波电真空器件国家级重点实验室,北京 100015
- 折叠
摘要
Abstract
Aiming to address the bottleneck of low output power in terahertz band traveling wave tubes and responding to the distinct demand for compact design,this paper proposes a 0.34 THz folded waveguide traveling wave tube structure with power combination inside the tube.Firstly,the high-frequency characteristics of the folded waveguide slow-wave structure are investigated.Electromagnetic full-wave simulations are used to obtain its dispersion characteristics and coupling impedance.The normalized phase velocity at 0.34 THz is 0.248 and the coupling impedance is 0.46 Ω.Secondly,a 3 dB directional coupler structure for in-tube power combination is designed.The analysis indicates that its amplitude balance is within±0.19 dB in the range of 0.31-0.368 THz,and the isolation exceeds 24 dB.Finally,the basic structure of the folded waveguide traveling wave tube based on the in-tube combination of the 3 dB directional coupler is demonstrated.The simulation model is constructed,and the results show a maximum output power of 9.16 W,a gain of 26.6 dB,and a 3 dB bandwidth of 21 GHz.For comparison,the output power of a single folded waveguide traveling wave tube is 6.18 W.The output power of the in-tube synthesized folded waveguide traveling wave tube is 1.48 times that of the single traveling wave tube.Moreover,compared with the design of a dual-tube assembly using conventional external power combination structure,the lateral size is reduced by at least 56.5%.关键词
太赫兹(THz)/折叠波导行波管/3 dB定向耦合器/功率合成/注-波互作用Key words
terahertz/folded waveguide traveling-wave tube/3 dB directional coupler/power combination/beam-wave interaction分类
信息技术与安全科学引用本文复制引用
向怀鑫,缪旻,李振松,边兴旺..太赫兹折叠波导慢波电路及功率合成技术[J].强激光与粒子束,2024,36(12):63-68,6.
