Title :
A planar quasi-optical SIS receiver suitable for array applications
Author :
Stimson, P.A. ; Dengler, R.J. ; Siegel, P.H. ; LeDuc, H.G.
Author_Institution :
Jet Propulsion Lab., Pasadena, CA, USA
Abstract :
A novel planar, quasi-optical SIS (superconductor-insulator-superconductor) receiver operating at 230 GHz is described. The receiver consists of a 2*5 array of half-wave dipole antennas with ten niobium-aluminium-oxide-niobium SIS junctions on a quartz dielectric-filled parabola. The 1.2-GHz intermediate frequency is coupled from the mixer via coplanar strip transmission lines and 4:1 balun transformers. The receiver is operated at 4.2 K in a liquid-helium immersion cryostat. Accurate measurements of the performance of single receiver elements are reported. A mixer noise temperature of 148 K DSB, receiver noise temperature of 259 K DSB, and conversion loss of 10 dB into a matched load have been obtained.<>
Keywords :
aluminium compounds; dipole antennas; microwave antenna arrays; mixers (circuits); niobium; optical receivers; superconducting junction devices; superconducting microwave devices; 10 dB; 230 GHz; 4.2 K; Nb-AlO/sub x/-Nb; array applications; balun transformers; conversion loss; coplanar strip transmission lines; half-wave dipole antennas; liquid-helium immersion cryostat; mixer; noise temperature; planar quasi-optical SIS receiver; quartz dielectric-filled parabola; Antenna arrays; Dielectrics; Dipole antennas; Josephson junctions; Mixers; Receiving antennas; Superconducting device noise; Superconducting devices; Superconducting transmission lines; Temperature;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188275
