期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 372, 期 -, 页码 427-431出版社
ELSEVIER
DOI: 10.1016/S0921-4534(02)00715-3
关键词
terahertz receiver; hot-electron bolometric mixer; NbN thin film
A low noise heterodyne receiver is being developed for the terahertz range using a phonon-cooled hot-electron bolometric mixer based on 3.5 nm thick superconducting NbN film. In the 1-2 GHz intermediate frequency band the double-sideband receiver noise temperature was 450 K at 0.6 THz, 700 K at 1.6 THz and 1100 K at 2.5 THz. In the.3-8 GHz IF band the lowest receiver noise temperature was 700 K at 0.6 THz, 1500 K at 1.6 THz and 3000 K at 2.5 THz while it increased by a factor of 3 towards 8 GHz. (C) 2002 Elsevier Science B.V. All rights reserved.
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