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

Conference · Fri Mar 01 00:00:00 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-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

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