W波段带状注耦合腔慢波结构行波管的设计与冷测  

Design and cold-test of sheet beam coupled cavity slow wave structure for W-Band TWT

作　　者：路志刚[1] 葛卫华 温瑞东 苏志成 朱美玲 丁科森 王战亮[1] 唐涛[1] LU Zhi-Gang;GE Wei-Hua;WEN Rui-Dong;SU Zhi-Cheng;ZHU Mei-Ling;DING Ke-Sen;WANG Zhan-Liang;TANG Tao(National Key Laboratory of Science and Technology on Vacuum Electronics,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院大功率微波电真空器件技术国防科技重点实验室,四川成都610054

出　　处：《红外与毫米波学报》2020年第2期157-162,共6页Journal of Infrared and Millimeter Waves

基　　金：Supported by the Key Laboratory Foundation(614280701020117);China Postdoctoral Science Foundation(2017M62299)。

摘　　要：对W波段三槽梯形线耦合腔慢波结构(包括大功率输入输出耦合器和射频窗)的加工和冷测进行了研究。此慢波结构由一个矩形波导耦合器馈电,该耦合器由放置在输入腔短边上的三阶阶梯变换矩形波导组成。首先,利用仿真方法研究了慢波结构的色散、互作用阻抗、传输特性和注-波互作用。结果表明,采用三槽梯形线耦合腔慢波结构的行波管能够在91~96 GHz的频率范围内提供大于1000 W的饱和输出功率,并且在94 GHz频点,饱和输出功率最大,可以达到1125 W。其次,采用高精度数控铣床加工出三槽梯形线慢波结构,并将其固定在非磁性不锈钢外壳中。文中给出了带有耦合器和射频窗的三槽梯形线慢波系统的测试结果,表明在90 GHz到100 GHz的频率范围内,S11<-10 dB。因此,三槽梯形线慢波结构在W波段大功率行波管方面具有应用前景。This paper presents the fabrication and cold-test of a three-slot-staggered-ladder coupled cavity slow wave structure(CC-SWS)along with high power input-output couplers and RF windows in W-band.The SWS is fed by a rectangular waveguide coupler which is made up of a three-order step-transform rectangular waveguide placed on the short edge of the input cavity.Firstly,the dispersion,interaction impedance,transmission property and beam-wave interaction are studied using the simulation method.It is shown that the traveling wave tube(TWT)with a three-slot-staggered-ladder CC-SWS is able to provide a saturation output power of more than 1000 W in the frequency range of 91~96 GHz,and the maximum saturated output power can reach 1125 W at 94 GHz.Secondly,the CC-SWS is fabricated by the high-precision CNC milling and fixed in a nonmagnetic stainless steel housing.Test results of the fabricated CC-SWS with couplers and RF-windows are presented,showing the S11<-10 dB in the frequency range of 90 GHz to 100 GHz.Therefore,the three-slot-staggered-ladder CC-SWS is a promising slow wave circuit of high power W-band TWT.

关 键 词：行波管 W波段 三槽梯形 耦合腔慢波结构 冷测 

分 类 号：TN214[电子电信—物理电子学]