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Radiophysics and Quantum Electronics

Superconductor Receivers for Space, Aerostat and Ground Sub-THz Radio Telescopes

Yu. Yu. Balega, Andrey M. Baryshev, Grigoriy M. Bubnov, Vyacheslav F. Vdovin, Sergey N. Vdovichev, Aleksandra A. Gunbina, Pavel N. Dmitriev, Viktor K. Dubrovich, И. И. Зинченко, V. P. Koshelets, S. A. Lemzyakov, D. V. Nagirnaya, Kirill I. Rudakov, A. V. Smirnov, Michael A. Tarasov, Lyudmila V. Filippenko, В. Б. Хайкин, Andrey V. Khudchenko, A. M. Chekushin, Valeryan S. Edel'man, Renat A. Yusupov, G. V. Yakopov

Published Aug 1, 2020• 0 citations
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We report on research in the field of low-noise receiving systems in the sub-terahertz (THz) range, carried out in recent years, aimed at developing receivers with quantum sensitivity for implementation in space and ground-based radio telescopes. Superconductor-Insulator-Superconductor (SIS) mixers based on high-quality tunnel junctions are the key elements of the most sensitive sub-THz heterodyne receivers. Motivations and physical background for technology improvement and optimization, as well as fabrication details, are described. This article presents the results of the SIS receiver developments for the 211–275 GHz and 790–950 GHz frequency ranges with a noise temperature in the double sideband (DSB) mode of approximTELY 20 K and 200 K, respectively. These designs and achievements are implemented in the development of the receiving systems for the Russian Space Agency mission “Millimetron”, and for the ground-based APEX (Atacama Pathfinder EXperiment) telescope.
This repost describes our results on development of low-noise heterodyne THz receivers for ground based and space radio astronomy. Superconductor-insulator-superconductor (SIS) mixers that employ high quality Nb-based tunnel junctions are the key element of the most sensitive heterodyne THz receivers. In particular we present here the SIS receivers for frequency range 211-275 GHz and 800-950 GHz with double sideband (DSB) noise temperature of about 25 K and 220 K, respectively. The latest results on development, fabrication techniques and experimental study of the SIS receivers will be discussed.