Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers
Semenov, A.D. and Hübers, H.-W. and Richter, H. and Birk, Manfred and Krocka, Michail and Mair, Ulrich and Vachtomin, Y.V. and Finkel, M. and Antipov, S. and Voronov, B. and Smirnov, K. and Kaurova, N. and Drakinski, V. and Gotsman, G. (2003) Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers. IEEE Transactions on Applied Superconductivity, 13 (2), pp. 168-171. DOI: 10.1109/TASC.2003.813672. ISSN 1051-8223.
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We present recent results showing the development of superconducting NbN hot-electron bolometer mixer for German receiver for astronomy at terahertz frequencies and terahertz limb sounder. The mixer is incorporated into a planar feed antenna, which has either logarithmic spiral or double-slot configuration, and backed on a silicon lens. The hybrid antenna had almost frequency independent and symmetric radiation pattern slightly broader than expected for a diffraction limited antenna. At 2.5 THz the best 2200 K double side-band receiver noise temperature was achieved across a 1 GHz intermediate frequency bandwidth centred at 1.5 GHz. For this operation regime, a receiver conversion efficiency of -17 dB was directly measured and the loss budget was evaluated. The mixer response was linear at load temperatures smaller than 400 K. Implementation of the MgO buffer layer on Si resulted in an increased 5.2 GHz gain bandwidth. The receiver was tested in the laboratory environment by measuring a methanol emission line at 2.5 THz.
|Title:||Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers|
|Journal or Publication Title:||IEEE Transactions on Applied Superconductivity|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 168-171|
|Keywords:||hot electron bolometer, heterodyne receiver|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben IR-Astronomie (old)|
|Location:||Berlin-Adlershof , Oberpfaffenhofen|
|Institutes and Institutions:||Institute of Planetary Research > Terahertz and Infrared Sensors|
Remote Sensing Technology Institute
|Deposited By:||Susanne Pieth|
|Deposited On:||01 Dec 2005|
|Last Modified:||27 Apr 2009 04:42|
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