摘要
针对未来大容量高速率通信系统对行波管(TWT)高频率、大功率、宽带宽等关键特性的迫切需求,提出一种将螺旋线慢波结构和折叠波导慢波结构结合的新型混合慢波结构,旨在实现行波管宽带特性和热稳定性。通过理论分析和设计仿真研究混合慢波系统中电子注参数和高频参数的传递关系,开展注波互作用仿真研究;并基于研究设计了一支E波段混合慢波结构TWT样管,进行功率和增益测试,对比混合慢波结构和折叠波导(FWG)行波管的主要参数特性。测试结果表明,该混合慢波结构行波管在68~80 GHz频率范围内输出功率≥78 W,饱和增益≥20 dB,带内小信号增益参数相对折叠波导降低50%以上,验证了混合慢波结构的可行性和有效性。
To address the urgent needs of future high-capacity,high-rate communication systems for key Traveling-Wave-Tube(TWT)characteristics—high frequency,high power,and wide bandwidth—a new hybrid slow-wave structure that combines a helical slow-wave structure with a folded-waveguide slow-wave structure is proposed,aiming to realize broadband performance and thermal stability in TWTs.Through theoretical analysis and design simulations,the transfer relationships between electron-beam parameters and high-frequency parameters in the hybrid slow-wave system are studied,and beam-wave interaction simulations are conducted.Based on these studies,an E-band hybrid slow-wave structure TWT prototype is designed and fabricated;its output power and gain are tested,and the main parameters are compared with those of a conventional Folded-Waveguide(FWG)TWT.Test results show that the hybrid slow wave structure TWT delivers more than 78 W output power and more than 20 dB saturated gain over 68~80 GHz,while its in-band small-signal gain parameter is reduced by more than 50%relative to the folded-waveguide device,verifying the feasibility and effectiveness of the hybrid slow-wave structure.
作者
瞿波
梁晓峰
梁潇
李志良
常通
李安
闫冠齐
冯进军
QU Bo;LIANG Xiaofeng;LIANG Xiao;LI Zhiliang;CHANG Tong;LI An;YAN Guanqi;FENG Jinjun(Beijing Vacuum Electronics Research Institute,Beijing 100015,China)
出处
《太赫兹科学与电子信息学报》
2025年第9期906-911,927,共7页
Journal of Terahertz Science and Electronic Information Technology
