%0 Conference Proceedings
%T A broadband terahertz heterodyne receiver with an NbN HEB mixer
%A Cherednichenko, S.
%A Kroug, M.
%A Khosropanah, P.
%A Adam, A.
%A Merkel, H.
%A Kolberg, E.
%A Loudkov, D.
%A Voronov, B.
%A Gol'tsman, G.
%A Richter, H.
%A Hübers, H. W.
%Y Harward University
%S Proc. 13[super:th] Int. Symp. Space Terahertz Technol.
%D 2002
%C Cambridge, MA, USA
%F Cherednichenko_etal2002
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=332), last updated on Fri, 21 May 2021 13:20:30 -0500
%X We present a broadband and low noise heterodyne receiver for 1.4-1.7 THz designed for the Hershel Space Observatory. A phonon- cooled NbN HEB mixer was integrated with a normal metal double- slot antenna and an elliptical silicon lens. DSB receiver noise temperature Tr was measured from 1 GHz through 8GHz intermediate frequency band with 50 MHz instantaneous bandwidth. At 4.2 K bath temperature and at 1.6 THz LO frequency Tr is 800 K with the receiver noise bandwidth of 5 GHz. While at 2 K bath temperature Tr was as low as 700 K. At 0.6 THz and 1.1 THz a spiral antenna integrated NbN HEB mixer showed the receiver noise temperature 500 K and 800 K, though no antireflection coating was used in this case. Tr of 1100 K was achieved at 2.5 THz while the receiver noise bandwidth was 4 GHz.
%K NbN HEB mixers
%U https://www.nrao.edu/meetings/isstt/2002.shtml
%P 85-95