%0 Conference Proceedings
%T NbN hot-electron mixer at radiation frequencies between 0.9 THz and 1.2 THz
%A Gousev, Yu P.
%A Olsson, H. K.
%A Gol'tsman, G. N.
%A Voronov, B. M.
%A Gershenzon, E. M.
%S Proc. 9[super:th] Int. Symp. Space Terahertz Technol.
%D 1998
%F Gousev_etal1998
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1588), last updated on Tue, 25 May 2021 18:47:44 -0500
%X We report on noise temperature measurements for a NbN phonon-cooled hot-electron mixer at radiation frequencies between 0.9 THz and 1.2 THz. Radiation was coupled to the mixer, placed in a vacuum chamber of He cryostat, by means of a planar spiral antenna and a Si immersion lens. A backward-wave oscillator, tunable throughout the spectral range, delivered an output power of few 1.1W that was enough for optimum operation of the mixer. At 4.2 K ambient temperature and 1.025 THz radiation frequency, we obtained a receiver noise temperature of 1550 K despite of using a relatively noisy room-temperature amplifier at the intermediate frequency port. The noise temperature was fairly constant throughout the entire operation range and for intermediate frequencies from 1 GHz to 2 GHz.
%K NbN HEB mixers
%U https://www.nrao.edu/meetings/isstt/1998.shtml
%P 121-129