MM wave quasioptical SIS mixers
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:5947867
The authors have tested the performance of planar SIS mixers with log-periodic antennas at near millimeter and submillimeter wave frequencies from 90 to 360 GHz. The large --R/sub N/C product (--10 at 90 GHz,) of our Nb/NbO/sub x//Pb-In-Au junctions requires an integrated inductive tuning element to resonate the junction capacitance at the operating frequencies. They used two types of integrated tuning element, which were designed with the aid of measurements using a Fourier transform spectrometer. Preliminary results indicate that the tuning elements can give very good mixer performance up to at least 200GHz. An inductive wire in parallel with a 5-junction array gives a minimum mixer noise temperature of 115K (DSB) at 90GHz with a FWHM bandwidth of 8GHz. An open-ended microstrip stub in parallel with a single junction, gives minimum mixer noise temperatures of 150 and 200K (DSB) near 90 and 180GHz with FWHM bandwidths of 4 and 3GHz respectively. The relatively high mixer noise temperatures compared to those of waveguide SIS mixers in a similar frequency range are attributed mainly to the losses in our optical system, which is being improved.
- Research Organization:
- 1100000; 9522384; 4435000
- OSTI ID:
- 5947867
- Report Number(s):
- CONF-880812-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
CAPACITANCE
CHALCOGENIDES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELEMENTS
EQUIPMENT
FREQUENCY MIXING
GOLD
INDIUM
INTEGRATED CIRCUITS
JUNCTIONS
LEAD
MEASURING INSTRUMENTS
METALS
MICROELECTRONIC CIRCUITS
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NOISE
OPTICAL SYSTEMS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SEMICONDUCTOR DEVICES
SPECTROMETERS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTING WIRES
TEMPERATURE NOISE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WIRES
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
CAPACITANCE
CHALCOGENIDES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELEMENTS
EQUIPMENT
FREQUENCY MIXING
GOLD
INDIUM
INTEGRATED CIRCUITS
JUNCTIONS
LEAD
MEASURING INSTRUMENTS
METALS
MICROELECTRONIC CIRCUITS
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NOISE
OPTICAL SYSTEMS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SEMICONDUCTOR DEVICES
SPECTROMETERS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTING WIRES
TEMPERATURE NOISE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WIRES