%0 Conference Proceedings
%T Phonon cooled ultra thin NbN hot electron bolometer mixers at 620 GHz
%A Ekström, H.
%A Kollberg, E.
%A Yagoubov, P.
%A Gol'tsman, G.
%A Gershenzon, E.
%A Yngvesson, S.
%S Proc. 8[super:th] Int. Symp. Space Terahertz Technol.
%D 1997
%F Ekstroem_etal1997
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1604), last updated on Wed, 26 May 2021 00:02:39 -0500
%X We have measured the noise performance and gain bandwidth of 35 A thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. A double-sideband receiver noise temperature less than 1300 K has been obtained with a 3 dB bandwidth of GHz. The gain bandwidth is 3.2 GHz. A lower noise temperature of 1100 K has been achieved with an improved set-up. The mixer output noise dominated by thermal fluctuations is about 50-60 K, and the SSB receiver and intrinsic conversion gain is about -18 and -12 dB, respectively. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K.
%K NbN HEB mixers
%U https://www.nrao.edu/meetings/isstt/1997.shtml
%P 29-35