Title :
Millimeter wave superconducting receivers
Author :
Hu, Q. ; Mears, C.A. ; Richards, P.L.
Author_Institution :
Dept. of Phys., California Univ., Berkeley, CA, USA
Abstract :
Recent work done at Berkeley on the development of millimeter-wave heterodyne mixers using superconductor-insulator-superconductor (SIS) junctions is reviewed. Two types of mixers have been developed; a conventional waveguide system using a resonant cavity and an open-structure quasioptical system using planar antennas and lenses. Using the waveguide system, the lowest mixer noise level yet obtained (within 25% of the quantum limit) at 95 GHz has been achieved. The quasioptical system has achieved a good mixer performance up to 200 GHz, and it has shown promise for use at submillimeter wavelengths.<>
Keywords :
mixers (circuits); receivers; solid-state microwave devices; superconducting junction devices; 95 to 200 GHz; Berkeley; MM-wave superconducting receivers; SIS junctions; millimeter-wave heterodyne mixers; mixer noise level; mixers; open-structure quasioptical system; planar antennas; quasioptical system; resonant cavity; submillimeter wavelengths; superconductor-insulator-superconductor junctions; Josephson junctions; Laboratories; Quantum mechanics; Radio frequency; Superconducting device noise; Superconducting devices; Superconducting materials; Superconducting microwave devices; Superconducting photodetectors; Temperature;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.147021
