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Proceedings Paper

Modeling and measurement of IF gain bandwidth and intrinsic noise temperature for NbTiN hot electron bolometer mixers at Terahertz frequencies
Author(s): Jiang Ling; Fei Liu Yun; Satoshi Yamamoto
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Paper Abstract

In this paper, we present the modeling and measurement results of niobium titanium nitride hot electron bolometer mixers with different sizes at terahertz frequencies. A distributed hot spot model which is based on solving a heat balance equation is employed to characterize current-voltage curve, electron and phonon temperature distribution along superconducting microbridge, intermediate frequency gain bandwidth and intrinsic noise temperature of the mixers. The simulated intermediate frequency gain bandwidth decreases with the increase of microbridge length, which is in good agreement with measured results. A difference of factor of several tens exists between the calculated and measured mixer noise temperature, which is probably due to the disfigurement of waveguide structure and unknown noise from the mixer.

Paper Details

Date Published: 4 November 2010
PDF: 7 pages
Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78543N (4 November 2010); doi: 10.1117/12.870090
Show Author Affiliations
Jiang Ling, Nanjing Forestry Univ. (China)
Fei Liu Yun, Nanjing Forestry Univ. (China)
Satoshi Yamamoto, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7854:
Infrared, Millimeter Wave, and Terahertz Technologies
Cunlin Zhang; Xi-Cheng Zhang; Peter H. Siegel; Li He; Sheng-Cai Shi, Editor(s)

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