0.85THz可调谐式折叠波导再生反馈真空电子学振荡器的理论研究
投稿时间:2019-10-22  修订日期:2019-11-11  点此下载全文
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作者单位E-mail
李天一 北京真空电子技术研究所 litianyi_ve@hotmail.com 
潘攀 北京真空电子技术研究所  
孟维思 北京真空电子技术研究所  
蔡军 北京真空电子技术研究所  
冯进军 北京真空电子技术研究所  
闫铁昌 北京真空电子技术研究所  
中文摘要:本文提出了一种适用于850GHz太赫兹波成像系统的可调谐再生反馈振荡器。使用UV-LIGA微加工工艺制作慢波结构,可满足折叠波导在太赫兹频段的尺寸需求。使用CST微波工作室对折叠波导色散特性进行设计,同时针对于行波管和再生反馈振荡器中折叠波导的结构,阐明了影响频率调谐的因素。此外,对带衰减的反馈回路进行仿真模拟,并使用三维粒子模拟验证了整体设计。改变电子注电压可实现振荡频率可调,振荡从单频状态逐渐变为多频状态,整体输出功率均大于200mW。
中文关键词:再生反馈振荡器  太赫兹  折叠波导  PIC模拟
 
Theoretical Study of a 0.85-THz Tunable Folded Waveguide Regenerative-Feedback Vacuum-Electronics Oscillator
Abstract:A tunable feedback oscillator (RFO)for 850GHz terahertz wave imaging system is proposed. The use of a folded waveguide (FWG) as the slow-wave structure (SWS) permits the superior performance together with the capability of UV-LIGA process. The comparison of dispersion character of FWG designed and optimized using eigenmode solver in CST Microwave Studio, respectively applied in RFO and traveling wave tube (TWT) shows the key factor of tunable frequency centered at 850GHz. Additionally, a feedback circuit including T-junction with lossy metal is simulated and the design, including SWS and feedback circuit, is verified by 3-D particle-in-cell simulations. On varying the beam voltage, the frequency-adjustable oscillation changes from a stale single-frequency state at the beginning to multi-frequency spectra, demonstrating more than 200mW output power.
keywords:regenerative feedback oscillator(RFO)  terahertz  folded waveguide  PIC solver
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