Performance of NbN superconductive tunnel junctions as SIS mixers at 205 GHz

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5746696

McGrath, W R; Stern, J A; Javadi, H H.S.; Cypher, S R; Hunt, B D; LeDuc, H G ^[1]

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1. Jet Propulsion Lab., California Inst. of Technology, Pasadena, CA (US)

This paper reports on the performance of NbN superconductive tunnel junctions as SIS mixers at 205 GHz. The authors have fabricated small area ({le}1 {mu}{sup 2}) high current density NbN/MgO/NbN tunnel junctions with I- V characteristics suitable for high frequency mixers. Mesa- geometry junctions with an area of about 1 {mu}{sup 2} and critical current density of 5-10kA/cm{sup 2} are integrated with superconducting microstrip lines designed to resonate out the junction capacitance. Accurate values of junction capacitance and magnetic-penetration depth are required for the proper design of the microstrip. The authors studied the mixer gain and noise performance near 205 GHz as a function of the inductance provided by the microstrip line.

• OSTI ID: 5746696
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
AMPLIFICATION
CAPACITANCE
CHALCOGENIDES
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
GAIN
JUNCTIONS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MIXTURES
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PERFORMANCE
PHYSICAL PROPERTIES
PNICTIDES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT