%0 Conference Proceedings %T Phonon-cooled NbN HEB mixers for submillimeter wavelengths %A Kawamura, J. %A Blundell, R. %A Tong, C-Y E. %A Gol'tsman, G. %A Gershenzon, E. %A Voronov, B. %A Cherednichenko, S. %S Proc. 8[super:th] Int. Symp. Space Terahertz Technol. %D 1997 %F Kawamura_etal1997 %O exported from refbase (https://db.rplab.ru/refbase/show.php?record=275), last updated on Tue, 25 May 2021 23:57:01 -0500 %X The noise performance of receivers incorporating NbN phonon-cooled superconducting hot electron bolometric mixers is measured from 200 GHz to 900 GHz. The mixer elements are thin-film (thickness — 4 nm) NbN with —5 to 40 pm area fabricated on crystalline quartz sub- strates. The receiver noise temperature from 200 GHz to 900 GHz demonstrates no unexpected degradation with increasing frequency, being roughly TRx ,; 1-2 K The best receiver noise temperatures are 410 K (DSB) at 430 GHz, 483 K at 636 GHz, and 1150 K at 800 GHz. %K waveguide NbN HEB mixers %U https://www.nrao.edu/meetings/isstt/1997.shtml %P 23-28