微带型交指线慢波结构的冷测特性分析  

Cold-test characteristic analysis of Micro-strip inter-digital slow-wave structure

作　　者：甯彪 缪旻[1,2] 

机构地区：[1]北京信息科技大学信息微系统研究所,北京100101 [2]北京大学微米/纳米加工技术国家级重点实验室,北京100871

出　　处：《北京信息科技大学学报（自然科学版）》2015年第2期45-49,共5页Journal of Beijing Information Science and Technology University

基　　金：国家自然科学基金资助项目(61176102;60976083;60501007);国家重大科技专项基金资助项目(2009ZX02038);北京市自然科学基金资助项目(3102014);北京市属高等学校人才强教计划资助项目(PHR201108257);北京市属高等学校高层次人才引进与培养计划项目资助(长城学者)

摘　　要：采用有限积分高频电磁仿真软件对微带型交指线慢波结构进行理论分析、结构设计和模拟计算。分析了交指线慢波结构的色散特性和耦合阻抗等冷测特性,并且对影响慢波电路特性的结构参数如交指宽度、交指厚度和交指长度对其冷特性的影响进行了仿真和分析,同时提出了两种改进的交指线慢波结构,并对其进行了冷特性的分析。结果表明:交指线长度和宽度对色散特性的影响较大,交指厚度的影响不大。而改进型的两种交指结构使得慢波电路的工作频带变宽,增强了耦合阻抗,电磁波与电子注的互作用得到了加强,能量的转换效率有了提高,对于交指线慢波结构的冷测特性有积极的影响。The micro-strip inter-digital line slow wave structure is discussed in this paper, which includes theoretic analysis, structure design and numerical simulation by the finite integral high frequency electromagnetic simulation software. The structural parameters affecting the slow-wave circuit characteristic （such as inter-digital width, inter-digital thickness, inter-digital length et. al ） are simulated and analyzed. Two kinds of improved inter-digital slow-wave structures are proposed with cold characteristics analysis. The results show that the length and width of the inter-digital line slow wave have more effects on the cold characteristics, but inter-digital thickness does not. Meanwhile, the two kinds of improved inter-digital slow wave structures have a positive effect on the cold test characteristics of the inter-digital slow wave structures, which makes the work frequency range of the slow wave improved, enhancing the coupling impedance and the interaction between electromagnetic wave and the electron beam, and improving the energy conversion efficiency. It has a positive effect on the cold test characteristic of the inter-digital slow wave structure.

关 键 词：微带型交指慢波结构 色散特性 耦合阻抗 高频电磁仿真软件 

分 类 号：TN125[电子电信—物理电子学]