ISSTT Proceedings

ISSTT Proceedings

You searched for:search icon

No Keywords
Showing 0 of items from your search. Start over 

NbN Hot-Electron Mixer at Radiation Frequencies Between 0.9 THz and 1.2 THz

Authors:
Yu. P. Gousev, H. K. Olsson, G. N. Gol'tsman, B. M. Voronov, E. M. Gershenzon
Abstract:
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.
Categories:
HEB Mixers
Year:
1998
Session:
3
Full-text:
Download a PDF of this paper.
Page Number(s):
121-129