Low Noise Receivers at 1.6 THz and 2.5 THz Based on Niobium Nitride Hot Electron Bolometer Mixers

被引：14
作者：
Chen, J. [1 ,2 ]
Liang, M. [1 ,2 ]
Kang, L. [1 ,2 ]
Jin, B. B. [1 ,2 ]
Xu, W. W. [1 ,2 ]
Wu, P. H. [1 ,2 ]
Zhang, W. [3 ]
Jiang, L. [3 ]
Li, N. [3 ]
Shi, S. C. [3 ]
机构：
[1] Nanjing Univ, RISE, Dept Elect Sci & Engn, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Natl Lab Nanjing Microstruct, Nanjing 210093, Peoples R China
[3] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2009年 / 19卷 / 03期
关键词：
Hot electron bolometer (HEB) mixer; quasi-optical superconducting heterodyne detector; receiver noise temperature; terahertz (THz); TERAHERTZ FREQUENCIES; JUNCTION;
D O I：
10.1109/TASC.2009.2017910
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Low noise receivers based on superconducting niobium nitride (NbN) hot electron bolometer (HEB) mixers have been designed, fabricated and measured in the terahertz (THz) frequency range for applications in astronomy and cosmology. The NbN HEB mixer consists of a planar antenna and an NbN bridge connecting across the antenna's inner terminals on high-resistivity Si substrates. Double sideband (DSB) receiver noise temperatures of 920 K at 1.6 THz and 1630 K at 2.5 THz have been obtained at 4.2 K without corrections. Effects of Parylene C AR coating on the lens have been studied; with such a coating a lowest DSB receiver noise temperature of 1135 K at 2.5 THz has been obtained at 4.2 K.
引用
收藏
页码：278 / 281
页数：4
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