Title :
Progress on tunerless SIS mixers for the 200-300 GHz band
Author :
Kerr, A.R. ; Pan, S.K. ; Lichtenberger, A.W. ; Lea, D.M.
Author_Institution :
Nat. Radio Astron. Obs., Charlottesville, VA, USA
Abstract :
An integrated superconductor-insulator-superconductor (SIS) mixer for the 200-300-GHz band with no adjustable tuning is described. A waveguide input is coupled to a coplanar mixer circuit with six individually tuned SIS junctions in series. Using the best mixer, the receiver noise temperature is 45-80 K DSB over 215-275 GHz. The mixer noise temperature at 230 GHz is 12 K DSB, and the conversion loss is 2.5 dB DSB.<>
Keywords :
mixers (circuits); solid-state microwave circuits; strip line components; superconducting junction devices; superconducting microwave devices; 2.5 dB; 200 to 300 GHz; EHF; MM-wave type; conversion loss; coplanar mixer circuit; individually tuned SIS junctions; superconductor-insulator-superconductor; tunerless SIS mixers; waveguide input; Circuit optimization; Coplanar waveguides; Coupling circuits; Josephson junctions; Superconducting device noise; Superconducting devices; Temperature; Tuned circuits; Tuners; Waveguide junctions;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
