@InProceedings{Cherednichenko_etal2002, author="Cherednichenko, S. and Kroug, M. and Khosropanah, P. and Adam, A. and Merkel, H. and Kolberg, E. and Loudkov, D. and Voronov, B. and Gol{\textquoteright}tsman, G. and Richter, H. and H{\"u}bers, H. W.", editor="Harward University", title="A broadband terahertz heterodyne receiver with an NbN HEB mixer", booktitle="Proc. 13$^{th}$ Int. Symp. Space Terahertz Technol.", year="2002", address="Cambridge, MA, USA", pages="85--95", optkeywords="NbN HEB mixers", abstract="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.", optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=332), last updated on Fri, 21 May 2021 13:20:30 -0500", opturl="https://www.nrao.edu/meetings/isstt/2002.shtml" }