Title :
Study on SIS Mixers for "ALMA" Band-10
Author :
Shitov, S.V. ; Koryukin, O.V. ; Uvarov, A.V. ; Bukovsky, M.A. ; Uzawa, Y. ; Noguchi, T. ; Takeda, M. ; Wang, Z. ; Krough, M. ; Vystavkin, A.N.
Author_Institution :
Inst. of Radio-Eng. & Electron., Russian Acad. of Sci., Moscow
Abstract :
This paper studies superconductor insulator superconductor (SIS) mixers for ALMA Band-10 project. The possible scheme of the ALMA Band-10 cartridge with balanced lens-antenna mixers is presented. The new balanced full-height waveguide SIS mixer comprises two equal mixer chips fabricated on quartz substrates. Each chip contains an RF circuit with hybrid twin-SIS junction NbTiN/Nb-AlOx-Nb/Al. The preliminary experimental study of Band-10 receiver with a double-slot antenna SIS mixer mounted with a 10-mm immersion silicon lens is done to define an optimum layout of the tuning circuit and a combination of materials leading to the best performance of the SIS mixer.
Keywords :
aluminium; aluminium compounds; lens antennas; niobium; niobium compounds; submillimetre wave mixers; superconducting microwave devices; superconductor-insulator-superconductor mixers; titanium compounds; waveguides; ALMA Band-10 project; Band-10 receiver; NbTiN-Nb-AlOx-Nb-Al; RF circuit; SiO2; frequency 787 GHz to 950 GHz; full-height waveguide SIS mixer; hybrid twin-SIS junction; lens-antenna mixer; mixer chips; quartz substrate; size 10 mm; superconductor insulator superconductor mixer; Circuit optimization; Hybrid junctions; Insulation; Josephson junctions; Lenses; Optical materials; Radio frequency; Receiving antennas; Silicon; Superconducting devices;
Conference_Titel :
Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves and Workshop on Terahertz Technologies, 2007. MSMW '07. The Sixth International Kharkov Symposium on
Conference_Location :
Kharkov
Print_ISBN :
1-4244-1237-4
DOI :
10.1109/MSMW.2007.4294614
