%0 Conference Proceedings
%T Superconductive NbN hot-electron bolometric mixer performance at 250 GHz
%A Kawamura, J.
%A Blundell, R.
%A Tong, C-Y E.
%A Golts'man, G.
%A Gershenzon, E.
%A Voronov B.
%S Proc. 7[super:th] Int. Symp. Space Terahertz Technol.
%D 1996
%F Kawamura_etal1996
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=945), last updated on Thu, 15 Jul 2021 00:36:26 -0500
%X Thin film NbN (<40 A) strips are used as waveguide mixer elements. The electron cooling mechanism for the geometry is the electron-phonon interaction. We report a receiver noise temperature of 750 K at 244 GHz, with / IF = 1.5 GHz, Af= 500 MHz, and Tphysical = 4 K. The instantaneous bandwidth for this mixer is 1.6 GHz. The local oscillator (LO) power is 0.5 1.tW with 3 dB-uncertainty. The mixer is linear to 1 dB up to an input power level 6 dB below the LO power. We report the first detection of a molecular line emission using this class of mixer, and that the receiver noise temperature determined from Y-factor measurements reflects the true heterodyne sensitivity.
%K NbN HEB mixers
%U https://www.nrao.edu/meetings/isstt/1996.shtml
%P 331-336