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OA北大核心CSTPCD
Development of a homodyne mixing system for performance characterization of terahertz superconducting KIDs
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.
张嘉文;金骏达;史生才;李婧;耿伟;吕伟涛;李陟;支强;彭昭航
中国科学技术大学 天文与空间学院,安徽 合肥 230026||中国科学院 紫金山天文台,江苏 南京 210009中国科学院 紫金山天文台,江苏 南京 210009香港中文大学 物理系,中国 香港 999077
物理学
KIDs零差混频系统太赫兹自相关算法
KIDshomodyne mixing systemterahertzautocorrelation
《红外与毫米波学报》 2024 (003)
336-345 / 10
Supported by the National Natural Science Foundation of China(11925304,12020101002,12103093);National Key R&D Program of China(2023YFA1608200).
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