Ka波段低电压悬置双微带曲折线慢波结构的设计与测试  

Design and test of a low voltage suspended dual-microstrip meander-line slow wave structure at Ka band

作　　者：何腾龙 王少萌[1] 李新义 许多[1] 王禾欣 师凝洁 巩华荣[1] 路志刚[1] 王战亮[1] 段兆云[1] 宫玉彬[1] HE Teng-Long;WANG Shao-Meng;LI Xin-Yi;XU Duo;WANG He-Xin;SHI Ning-Jie;GONG Hua-Rong;LU Zhi-Gang;WANG Zhan-Liang;DUAN Zhao-Yun;GONG Yu-Bin(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;Nanjing Sanle Electronic Group Company Ltd.,Nanjing 210009,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都610054 [2]南京三乐电子集团有限公司,江苏南京210009

出　　处：《红外与毫米波学报》2022年第2期437-442,共6页Journal of Infrared and Millimeter Waves

基　　金：Supported by National Natural Science Foundation of China(61921002,61988102,92163204 and 62071087)。

摘　　要：提出了一种悬置双微带曲折线慢波结构,介质基板悬置于封闭金属腔内,基板上下表面各镀有一条金属曲折线结构。该结构具有双电子束通道,电磁波具有对称的分布,因此,电磁波可以通过上下腔体与两束带状电子束互作用。通过仿真软件分析了其高频特性,设计工作电压和电流分别为2050 V和0.2 A,PIC仿真结果表明,在36 GHz处最大输出增益为26 dB,具有8 GHz的3-dB饱和功率带宽。实验测得该慢波结构反射损耗低于-10 dB,同时分析了慢波结构制备过程中影响传输损耗的主要因素。A suspended dual-microstrip meander-line(SDMML)slow wave structure(SWS)was proposed. It consists of a metal enclosure as well as a suspended dielectric substrate,on the upper and lower surfaces of which are two metal meander-lines. As there are two electron beam tunnels locating above and below the dielectric substrate,and the electromagnetic wave has symmetrical distribution,it is possible to use one electron beam in each tunnel to drive the electromagnetic wave for a higher output power. The high frequency characteristics and the beam-wave interaction results of the SDMML SWS have been investigated by using simulation software. The hot performances of this SWS show that for two identical sheet beams with a voltage of 2050 V and a current of 0. 2A,the SDMML SWS has a maximum gain of 26 dB at 36 GHz and 3-dB bandwidth of saturation power of 8GHz. To verify the simulation result,a SDMML SWS is fabricated by using new fabrication methods including the magnetron sputtering electroplate and laser ablation. The measured reflection loss of the SDMML SWS is better than-10 dB. The transmission loss of the fabricated slow wave structure is analyzed and verified through simulation and experimental results.

关 键 词：行波管 平面慢波结构 微带曲折线 

分 类 号：TN124[电子电信—物理电子学]