THz返波管圆波导梳状慢波结构的研究  

Investigation of Circular Comb Slow-Wave Structure of THz Backward-Wave Oscillators

作　　者：王自成[1] 陆德坚[1,2] 王莉[1] 李海强[1] 张世杰[1] 徐安玉[1] 郝保良[1] 宋培德[1] 戴志浩[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《电子与信息学报》2008年第11期2792-2794,共3页Journal of Electronics & Information Technology

摘　　要：该文利用三维电磁仿真软件模拟计算了THz圆波导梳状慢波结构的负1次返波的色散和耦合阻抗。结果证实:在430-570GHz频带内,慢波结构内半径为0.175mm,约为中心频率波长的0.292倍;在760-940GHz的频带内,慢波结构内半径为0.1mm,是中心频率处波长的0.392倍。该结构较大的径向尺寸有利于提高电子注通过率。这种结构负1次返波的耦合阻抗较小,基本上小于1Ω,很好解释了现有THz返波管的电子效率小于0.01%的事实。3-D electromagnetic simulation software is used to calculate the dispersion and interaction impedance of circular comb Slow-Wave Structure （SWS） which works for Terahertz （THz） Backward-wave Oscillators （BWO）. The results show that the inner radius of SWS is 0.175mm in the band of 430-570GHz, and the inner radius of SWS is 0.1mm in the band of 760-940GHz. The large radius of SWS is a great help for improving beam transmission. The interaction impedance of fundamental backward wave of the SWS is smaller than 1 Ω is a good explain to the truth that the electronic efficiency of THz BWO is smaller than 0.01%.

关 键 词：返波管 太赫兹 圆波导梳状慢波结构 色散:耦合阻抗 

分 类 号：TN125[电子电信—物理电子学]