基于小型制冷机的高温超导3mm波段谐波混频  

HIGH TEMPERATURE SUPERCONDUCTOR HARMONIC FREQUENCY MIXING AT 3mm WAVE BAND MOUNTED ON CRYOCOOLER

作　　者：董晔[1] 许伟伟[1] 杨莉[1] 张亚凡[1] 郭大元[1] 陈健[1] 吴培亨[1] 

机构地区：[1]南京大学电子科学与工程系超导电子学研究所,南京210093

出　　处：《低温物理学报》2005年第3期246-250,共5页Low Temperature Physical Letters

基　　金：国家高技术研究发展计划课题(项目编号:2002AA306451);国家自然科学基金(项目编号:10474036)资助课题.~~

摘　　要：高温超导混频器具有灵敏度和谐波次数高、所需的本振和微波信号功率小、噪声低、工作频带宽等诸多优点.利用小型制冷机制冷有利于高温超导器件的应用.我们设计了与小型制冷机配套的高温超导混频系统,采取一些抑制系统噪声的措施.在该系统上成功实现了高温超导混频器在3毫米波段的50次谐波混频.Josephsen junction mixer has much excellence, including its high sensitivity and harmonic, low local oscillator frequency and microwave power, low noise and wide frequency band. The cryocooler can be used as a cooler of the high temperature superconductor mixing measurement system. We have designed and made a new HTS mixing systern mounted on the cryocooler. Some measures have been taken to decrease the system noise. With HTS Josephsen junction as the mixing element, 50th harmonic frequency mixing at 3mm wave band is obtained on the system.

关 键 词：高温超导 谐波混频 小型制冷机 高温超导器件 谐波混频 毫米波段 制冷机 系统噪声 超导混频器 信号功率 灵敏度 频带宽 

分 类 号：O511[理学—低温物理]