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Proceedings Paper

Stability of HEB receivers at THz frequencies
Author(s): Therese Berg; Sergey Cherednichenko; Vladimir Drakinskiy; Pourya Khosropanah; Harald F. Merkel; Erik L. Kollberg; Jacob W. Kooi
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Paper Abstract

Stability of a hot-electron bolometer (HEB) heterodyne receiver was investigated at frequencies from 0.6THz to 1.9THz. The Allan variance was measured as a function of the integration time and the Allan time was obtained for HEB mixers of different size, as well as with different types of the local oscillator: FIR laser, multiplier chain, and BWO. We have found that due to stronger dependence of the mixer gain and noise vs mixer bias voltage and current the Allan time is shorter for smaller mixers. At 1.6THz the Allan time is 3 sec for 4x0.4μm2 bolometer, and 0.15-0.2 sec for 1x0.15μm2 bolometer. Obtained stability apears to be the same for the FIR laser and the mulitplier chain. The Allan time for smaller bolometers increases to 0.4-0.5sec at 0.6-0.7THz LO frequencies. The influence of the IF chain on the obtained results is also analyzed.

Paper Details

Date Published: 8 October 2004
PDF: 11 pages
Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); doi: 10.1117/12.553162
Show Author Affiliations
Therese Berg, Chalmers Univ. of Technology (Sweden)
Sergey Cherednichenko, Chalmers Univ. of Technology (Sweden)
Vladimir Drakinskiy, Chalmers Univ. of Technology (Sweden)
Moscow State Pedagogical Univ. (Sweden)
Pourya Khosropanah, Chalmers Univ. of Technology (Sweden)
Harald F. Merkel, Chalmers Univ. of Technology (Sweden)
Erik L. Kollberg, Chalmers Univ. of Technology (Sweden)
Jacob W. Kooi, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5498:
Millimeter and Submillimeter Detectors for Astronomy II
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington, Editor(s)

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