TY - CONF AU - Yazoubov, P. AU - Kroug, M. AU - Merkel, H. AU - Kollberg, E. AU - Gol'tsman, G. AU - Lipatov, A. AU - Svechnikov, S. AU - Gershenzon, E. PY - 1998 DA - 1998// TI - Quasioptical NbN phonon-cooled hot electron bolometric mixers with low optimal local oscillator power T2 - Proc. 9[super:th] Int. Symp. Space Terahertz Technol. BT - Proc. 9[super:th] Int. Symp. Space Terahertz Technol. SP - 131 EP - 140 KW - 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. UR - https://www.nrao.edu/meetings/isstt/1998.shtml N1 - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1589), last updated on Tue, 25 May 2021 18:52:40 -0500 ID - Yazoubov_etal1998 ER -