PT Unknown
AU Yazoubov, P
   Kroug, M
   Merkel, H
   Kollberg, E
   Gol'tsman, G
   Lipatov, A
   Svechnikov, S
   Gershenzon, E
TI Quasioptical NbN phonon-cooled hot electron bolometric mixers with low optimal local oscillator power
SE Proc. 9[super:th] Int. Symp. Space Terahertz Technol.
PY 1998
BP 131
EP 140
DE NbN HEB mixers
AB In this paper, the noise perform.ance of NIN based phonon-cooled Hot Electron Bolometric (HEB) quasioptical mixers is investigated in the 0.55-1.1 THz frequency range. The best results of the DSB noise temperature are: 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz and 1250 K at 1.1 THz. The water vapor in the signal path causes a significant contribution to the measured noise temperature around 1.1 THz. The required LO power is typically about 60 nW. The frequency response of the spiral antenna+lens system is measured using a Fourier Transform Spectrometer with the HEB operating in a detector mode.
ER