@InProceedings{Yazoubov_etal1998, author="Yazoubov, P. and Kroug, M. and Merkel, H. and Kollberg, E. and Gol{\textquoteright}tsman, G. and Lipatov, A. and Svechnikov, S. and Gershenzon, E.", title="Quasioptical NbN phonon-cooled hot electron bolometric mixers with low optimal local oscillator power", booktitle="Proc. 9$^{th}$ Int. Symp. Space Terahertz Technol.", year="1998", pages="131--140", optkeywords="NbN HEB mixers", abstract="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.", optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1589), last updated on Tue, 25 May 2021 18:52:40 -0500", opturl="https://www.nrao.edu/meetings/isstt/1998.shtml" }