Title :
A sideband separating mixer for 85-115 GHz
Author :
Vassilev, V. ; Belitsky, V. ; Risacher, C. ; Lapkin, I. ; Pavolotsky, A. ; Sundin, E.
Author_Institution :
Dept. of Radio & Space Sci., Chalmers Univ. of Tech nology, Gothenburg, Sweden
fDate :
6/1/2004 12:00:00 AM
Abstract :
This paper presents the results of development and tests of a sideband separating heterodyne receiver for the 85-115 GHz band with superconducting tunnel junctions (SIS) as frequency down converters. Sideband separation is achieved by using a quadrature scheme where two identical mixer junctions are pumped by a local oscillator (LO) with 90° phase difference. We used an innovative mixer layout where the quadrature scheme is implemented using waveguide-based and integrated on-chip components. We employed an additional pair of SIS junctions as terminations for LO-injection directional couplers.
Keywords :
directional couplers; millimetre wave mixers; millimetre wave receivers; superconductor-insulator-superconductor mixers; 85 to 115 GHz; LO-injection directional couplers; SIS mixer; frequency down converters; innovative mixer layout; integrated on-chip components; local oscillator; mixer junctions; quadrature scheme; sideband separating heterodyne receiver; sideband separating mixer; sideband separation; superconducting tunnel junctions; waveguide-based components; waveguide-to-microstrip transition; Coupling circuits; Josephson junctions; Mixers; Radio frequency; Space technology; Superconducting device noise; Superconducting devices; Termination of employment; Waveguide junctions; Waveguide transitions; SIS; Sideband separating receiver; mixer; superconducting tunnel junctions; waveguide-to-microstrip transition;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.828028
