高效率双频段Ka/Q毫米波行波管螺旋慢波系统的研究  

Design of High-Efficiency Ka/Q Dual-Band Millimeter-Wave Helix Traveling Wave Tube Slow Wave Structure

作　　者：王小宁[1,2] 苏小保[1] 肖刘[1] 

机构地区：[1]中国科学院电子学研究所中国科学院高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《真空科学与技术学报》2016年第11期1234-1240,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助课题(Y59J131234)

摘　　要：通过模拟计算,分析了翼片加载深度和角度对色散特性和耦合阻抗的影响;优化高频电路,初步设计了满足Ka/Q双频段螺旋线行波管的慢波结构。为了提高注波互作用电子效率,采用螺距渐变/跳变分布结构,并在输出段的相速增加段增加了一段凹槽。运用三维电磁场软件MTSS仿真行波管注波互作用,经过优化,得到了在Ka（33~36 GHz）频段范围内输出功率大于407 W,电子效率大于22.36%,增益大于48.32 d B,在Q（43.5-46.5 GHz）频段范围内输出功率大于266 W,电子效率大于15.86%,增益大于44.06 d B。Vane loading was analyzed through simulation calculation,whose depth and angle may have influences on the dispersion and interaction impedance. After optimization of high frequency circuit,helix TWT slowwave structure which satisfies both Ka-band and Q-band was initially designed. In order to improve the efficiency of beam-wave interaction,the structure of pitch step and pitch taper was applied,moreover,one groove was used where was the output of phase velocity increasing. Using 3-D electromagnetic field software MTSS,TWT＇s beam-wave interaction was simulated,this tube after optimization can produce output power over 407 W from 33 to 36 GHz,electronic efficiency is more than 22. 36%,and gain is greater than 48. 32 d B. As well as from 43. 5 to 46. 5GHz the output power is over 266 W,electronic efficiency is more than 15. 86%,and the gain is greater than44. 06 d B.

关 键 词：行波管 高频特性 高效率 双频段 注波互作用 

分 类 号：O462.1[理学—电子物理学]