Title :
Integrated receiving structure comprising complementary spiral antenna and tuned parallel biased SIS array
Author :
Tarasov, M.A. ; Shitov, S.V. ; Koshelets, V.P. ; Prokopenko, G.V.
Author_Institution :
Inst. for Radio Eng. & Electron., Acad. of Sci., Moscow, Russia
fDate :
3/1/1993 12:00:00 AM
Abstract :
A type of superconducting receiving element comprising a complementary spiral antenna and a series-parallel superconductor-insulator-superconductor (SIS) array with individual tuning of each SIS junction has been designed, fabricated, and experimentally studied. The array was designed for the 80-160 GHz waveband and consists of five SIS junctions, each with a 1.5- mu /sup 2/ area, six inductive short-ended slotlines, and two decoupling capacitances. The effective direct detector bandwidth of this structure with a quantum efficiency equalling unity has been estimated to be as wide as 70 GHz. The noise temperature of the heterodyne mixer has been measured in a three-lens Gaussian beam guide by means of the hot/cold load method, yielding a receiver DSB noise temperature of 80 K. The intermediate-frequency (IF) mixer port load bandwidth and the effect of thermal background radiation on the I-V curve and the saturation of the SIS mixer have been studied.<>
Keywords :
electron device noise; microwave detectors; mixers (circuits); receivers; submillimetre wave devices; superconducting junction devices; superconducting microwave devices; waveguide antennas; 70 GHz; 80 K; 80 to 160 GHz; I-V curve; complementary spiral antenna; decoupling capacitances; effect of thermal background radiation; effective direct detector bandwidth; heterodyne mixer; hot/cold load method; inductive short-ended slotlines; integrated receiving structure; intermediate frequency; mixer port load bandwidth; noise temperature; quantum efficiency; saturation; superconducting receiving element; superconductor-insulator-superconductor; three-lens Gaussian beam guide; tuned parallel biased array; Antenna arrays; Background noise; Bandwidth; Gaussian noise; Josephson junctions; Receiving antennas; Spirals; Superconducting device noise; Superconducting devices; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
