Optimal choice of material for HEB superconducting mixers
نویسندگان
چکیده
منابع مشابه
Study of MgB2 HEB mixers at THz frequencies
The terahertz (THz) range is very attractive for astronomical observations. Spectroscopy and photometry of remote space objects in the THz range allows for a study of their chemical composition, because this range covers rotational lines from simple molecules and electron transition lines from atoms and ions. Heterodyne receivers, due to their high spectral resolution, in the THz range allows f...
متن کاملWideband THz HEB mixers using HPCVD MgB2 thin films
We present results of experimental study of the gain bandwidth (GBW) of MgB2 hot electron-bolometer (HEB) mixers at 0.1THz and 0.4THz. Antenna integrated 0.25-1.5um2 area devices were made from thin MgB2 films deposited with a custom made HPCVD system. Film as thin as 15-45nm had a Tc from 35K to 40K. The GBW was found to be independent on the bias conditions, the bath temperature, and the LO f...
متن کاملMgB2 HEB Mixers at Operation Temperatures above Liquid Helium Temperature
In this paper we discuss results of MgB2 thin films deposition for the hot-electron bolometer (HEB) application. For this purpose a custom made hybrid physical-chemical vapour deposition (HPCVD) system was built. For films thicknesses d in the 15-45nm range the critical temperatures were from 34K to 40K. For bridges as narrow as 500nm the critical current density was >107A/cm2 indicating a high...
متن کاملA Superconducting 180° IF Hybrid for Balanced SIS Mixers
A compact 180° hybrid has been developed for use in balanced SIS mixers. The lumped-element circuit uses superconducting Nb conductors on a 1.4 mm x 0.5 mm quartz substrate and operates over 4-12 GHz. Index TermsSuperconducting microwave devices, microwave integrated circuits, hybrid junctions, lumpedelement microwave circuits, superconductor-insulatorsuperconductor mixers.
متن کاملDevelopment of 0.8 THz and 1.5 THz Waveguide NbTiN HEB Mixers
In this paper, we present results on the noise performance of the waveguide Niobium Titanium Nitride (NbTiN) superconducting hot electron bolometer (HEB) mixers, cryogenically cooled by a 4-K close-cycled refrigerator. The NbTiN superconducting HEB mixer is fabricated on a crystalline quartz substrate, and is mounted in a waveguide mixer block for RF and LO coupling. At 0.81 THz, the uncorrecte...
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ژورنال
عنوان ژورنال: IEEE Transactions on Appiled Superconductivity
سال: 1999
ISSN: 1051-8223
DOI: 10.1109/77.783954