Ka波段500W螺旋线行波管高频结构及互作用研究  

Study of Slow Wave Structure and Beam-Wave Interaction for 500W Ka-band Helix TWTs

作　　者：陈波[1] 崔延军[1] 陆麒如[1] 冯源[1] 冯静[1] 冯进军[1] 

机构地区：[1]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

出　　处：《真空电子技术》2016年第4期13-16,共4页Vacuum Electronics

摘　　要：本文介绍了Ka波段500W毫米波螺旋线行波管高频结构设计和注波互作用模拟计算结果，计算了品字形高频结构的色散、耦合阻抗和衰减常数等参量。利用CST软件对返波振荡的起振长度进行了计算，根据计算结果提出了相速渐变法抑制返波振荡的措施。研制出了Ka波段螺旋线行波管样管，行波管在Ka波段2GHz工作频带内饱和输出功率在490～550w之间。This paper describes the simulation of slow wave structure and beam-wave interaction for a 500 W Ka-band helix travelling wave tube （TWT）. Some parameters of the slow wave structure including dispersion, coupled impedance and attenuation constant are calculated. Based on the length of starting oscillation calculated by CST software, phase velocity taper method is proposed to suppress backward wave oscillation. A prototype helix TWT is developed, which has output power from 490 W to 550 W over 2 GHz bandwidth in Ka-band.

关 键 词：毫米波 螺旋线 KA波段 行波管 返波振荡 

分 类 号：TN124[电子电信—物理电子学]