摘要
在亚毫米波频段,表征信号源的频谱特性是一项重要工作.用外差混频和直接检波(傅里叶变换频谱仪,FTS)两种方法测量一个亚毫米波连续波源(采用锁相技术且可在460～520GHz范围内调频)的频谱.500～GHz频段超导SIS隧道结在外差混频方法里用作混频器,而在直接检波方法里作为直接检波器.并对两种方法得到的结果进行了比较.
It is of particular interest to characterize the frequency spectrum of signal sources at submillimeter wavelengths. The heterodyne-mixing and direct-detection （ Fourier transform spectronleter, FTS） methods were introduced to measure the frequency spectrum of a submillimeter CW source （ phase-locked and tunahle from 460-520 GHz）. A 500-GHz superconductor-insulator-superconductor （SIS） tunnel junction was employed as a mixer for the former method but a direct detector for the latter. The measurement results are compared.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期321-323,327,共4页
Journal of Infrared and Millimeter Waves
基金
The project supported by CAS(KJCX2-SW-T2)and National Natural Science Foundation of China(20030001)
