PT Unknown
AU Semenov, A
   Hübers, H
   Richter, H
   Birk, M
   Krocka, M
   Mair, U
   Smirnov, K
   Gol'tsman, G
   Voronov, B
TI Performance of terahertz heterodyne receiver with a superconducting hot-electron mixer
SE Proc. 13[super:th] Int. Symp. Space Terahertz Technol.
PY 2002
BP 229
EP 234
AB During the past decade major advances have been made regarding low noise mixers for terahertz heterodyne receivers. State of the art hot-electron-bolometer (HEB) mixers have noise temperatures close to the quantum limit and require less than a microwatt power from the local oscillator (L0). The technology is now at a point where the performance of a practical receiver employing such mixer, rather than the figures of merit of the mixer itself, is of major concern. We have incorporated a phonon-cooled NbN HEB mixer in a 2.5 THz heterodyne receiver and investigated its performance. This yields important information for future development of heterodyne receivers such as GREAT (German receiver for astronomy at THz frequencies aboard SOFIA) [1] and TELIS (Terahertz limb sounder), a balloon borne heterodyne receiver for atmospheric research [2]. Both are currently under development at DLR.
ER