太赫兹超导动态电感探测器性能表征用零差混频系统研制  

Development of a homodyne mixing system for performance characterization of terahertz superconducting KIDs

作　　者：张嘉文 金骏达 史生才[2] 李婧[2] 耿伟 吕伟涛 李陟 支强 彭昭航 ZHANG Jia-Wen;JIN Jun-Da;SHI Sheng-Cai;LI Jing;GENG Wei;LYU Wei-Tao;LI Zhi;ZHI Qiang;PENG Zhao-Hang(School of Astronomy and Space,University of Science and Technology of China,Hefei 230026,China;Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210009,China;Department of Physics,Chinese University of Hong Kong,Hong Kong 999077,China)

机构地区：[1]中国科学技术大学天文与空间学院,安徽合肥230026 [2]中国科学院紫金山天文台,江苏南京210009 [3]香港中文大学物理系,中国香港999077

出　　处：《红外与毫米波学报》2024年第3期334-343,共10页Journal of Infrared and Millimeter Waves

基　　金：the National Natural Science Foundation of China(11925304,12020101002,12103093);National Key R&D Program of China(2023YFA1608200)。

摘　　要：零差混频系统(Homodyne mixing system)对太赫兹超导动态电感探测器(Kinetic inductance detectors,KIDs)性能表征具有重要的作用。然而,零差混频系统仍存在混频器不平衡性、测量系统集成、干扰信号等问题。作者设计新型的单通道零差混频硬件系统,结合软件算法实现了测量系统的集成化、IQ混频器不平衡性校准、KID的性能表征;同时实现了在VNA(vector network analyzer)CW模式下的KIDs噪声测量;以及基于自相关算法的双通道零差混频硬件电路设计,有效地抑制了干扰信号。值得注意的是,这些研究成果被应用于表征KIDs性能,对KIDs阵列设计起到了重要的作用。The homodyne mixing system is used to characterizing the performance of terahertz superconducting ki⁃netic inductance detectors(KIDs).However,homodyne mixing systems still have issues such as mixer imbal⁃ance,measurement system integration,and interference signals.The author designed a new single channel ho⁃modyne mixing hardware system and software algorithms to achieve integration of the measurement system,cali⁃bration of IQ-mixer imbalance,and performance characterization of KID;Furthermore,noise measurement of KIDs in VNA(vector network analyzer)CW mode is achieved;Finally,the method of hardware circuit design by dual channel homodyne mixing system based on autocorrelation algorithm effectively suppresses interference signals.It is worth noting that these research results are applied to characterize the performance of KIDs,which is important in the design of KIDs arrays.

关 键 词：KIDS 零差混频系统 太赫兹 自相关算法 

分 类 号：O43[机械工程—光学工程]