筒型重入式折叠波导结构W波段行波管研究  

Study on a W-Band TWT with Cylindrical Reentrant Folded Waveguide Structure

作　　者：陈辑 高畅 蔡军[1] CHEN Ji;GAO Chang;CAI Jun(National Key Laboratory of Science and Technology on Vacuum Electronics,Beijing Vacuum Electronics Research Institute,Beijing 100015,China)

机构地区：[1]北京真空电子技术研究所,北京100015

出　　处：《真空电子技术》2022年第3期47-51,共5页Vacuum Electronics

摘　　要：本文对一种适用于W波段行波管的筒型重入式折叠波导慢波结构电磁特性进行了研究。该结构通过在电子注通道外围包围一层均匀的圆筒金属壁,大幅增加了慢波结构耦合阻抗,改善了传统折叠波导慢波结构耦合阻抗较低的问题。仿真显示,该新结构对比传统折叠波导慢波结构,能够有效提升行波管性能。行波管在12.4 kV输入电压、50 mA输入电流、互作用长度30 mm的条件下,在8 GHz带宽内输出功率超过30 W。对比传统折叠波导行波管,新结构能够将耦合阻抗提升约90%,功率提升约100%,互作用长度缩短为传统结构的60%。The electromagnetic characteristics of a cylindrical reentrant folded waveguide slow wave structure(RFWG-SWS)suitable for W-band traveling wave tube(TWT)are studied.By surrounding a uniform cylindrical metal wall around the electron beam channel,the coupling impedance of the slow wave structure is greatly increased.Simulation results show that the new structure can effectively improve the performance of TWT compared with traditional folded waveguide slow wave structures.With 12.4 kV operating voltage,50 mA current and 30 mm interaction length,the output power of the TWT exceeds 30 W in 8 GHz bandwidth.Compared with the traditional folded waveguide TWT,the TWT with new structure can increase the coupling impedance by about 90%,increase the power by about 100%,and shorten the interaction length to 60%of the traditional one.

关 键 词：W波段 行波管 折叠波导慢波结构 

分 类 号：TN124[电子电信—物理电子学]