摘要
针对0.42THz-TE_(17,4)模式回旋管研究了一种高效率准光模式变换器。该模式变换器由Densiov型辐射器、准椭圆镜和两个相位校正镜组成。采用了耦合波理论分析波导辐射器的工作机理,矢量绕射理论计算开口辐射器和反射镜面上的场分布,并运用KSA算法和相位解缠绕技术对相位校正镜面进行优化设计。通过编程计算得到的数值计算结果与软件模拟结果高度一致。结果表明从Denisov型辐射器辐出射的能量经过镜面系统聚焦校正之后,在输出窗处转化为标量和矢量高斯成分分别高于99.1%和97.3%的束斑,其能量转换效率高于97.4%。
Theoretical investigation on a highly efficient quasi-optical mode converter for a 0.42THz-TE17,4 gyrotron is presented in this paper.The converter consists of a dimpled-wall Denisov-type launcher and three mirrors.Based on the coupled-mode theory,the vector diffraction theory,and phase unwrapping technique,a computer code has been developed to evaluate the field distributions,which agrees well with the simulated result.It shows that a well-focused wave beam is achieved with a high Gaussian mode purity(scalar content greater than 99.1%,vector content greater than 97.3%)and high power conversion efficiency of greater than 97.4%at the output window.
作者
王维
宋韬
刘頔威
刘盛纲
WANG Wei;SONG Tao;LIU Di-wei;LIU Sheng-gang(Terahertz Science and Technology Research Center,School of Electronic Science and Engineering,University of Electronic Science and Technology of China Chengdu 610054;Key Laboratory of Terahertz Technology,Ministry of Education Chengdu 610054)
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2018年第6期840-846,共7页
Journal of University of Electronic Science and Technology of China
基金
国家科技部重点研发项目(2017YFA0701000)
中央高校基本科研业务费(A03018023601003)。
作者简介
王维(1988-),男,博士,主要从事高功率太赫兹辐射源及其元器件方面的研究.
