منابع مشابه
A 492 GHz quasiopticd SIS receiver for submillimeter astronomy
A 492 GHz quasioptical superconductor-insulator-superconductor (SIS) heterodyne receiver for submillimeter astronomy has been constructed with a double-sideband noise temperature of 170+25 K, where the system response is an average over a 600 MHz i.f. bandwidth centered at 1.5 GHz. The excellent sensitivity is achieved through use of a planar twin-slot antenna feeding a pair of Nb-&OX-Nb juncti...
متن کاملA Low Noise NbTiN-based 850 GHz SIS Receiver for the Caltech Submillimeter Observatory
We have developed a niobium titanium nitride (NbTiN) based superconductorinsulator-superconductor (SIS) receiver to cover the 350 micron atmospheric window. This frequency band lies entirely above the energy gap of niobium (700 GHz), a commonly used SIS superconductor. The instrument uses an open structure twin-slot SIS mixer that consists of two Nb/AlN/NbTiN tunnel junctions, NbTiN thin-film m...
متن کاملA 850 GHz Waveguide Receiver Employing a Niobium SIS Junction Fabricated on a 1μm Si3N4 Membrane
We report on a 850 GHz SIS heterodyne receiver employing a RF tuned niobium tunnel junction with a current density of 14kA/cm2, fabricated on a 1 μm Si3N4 supporting membrane. Since the mixer is designed to be operated well above the superconducting gap frequency of niobium (2 /h ≈ 690 GHz), special care has been taken to minimize niobium transmission line losses. Both Fourier Transform Spectro...
متن کاملA 665 GHz WAVEGUIDE RECEIVER USING A TUNED 0.5μm Nb/AlOx/Nb SIS TUNNEL JUNCTION
We report recent results on a 580-740 GHz SIS heterodyne receiver employing a tuned 0.50μm Nb/AlOx/Nb SIS tunnel junction. The receiver has been successfully installed at the Caltech Submillimeter Observatory, Hawaii. Results of an untuned device in the same waveguide block were presented at the fifth International THz Conference. Since the mixer is meant to be operated near the supercodunting ...
متن کاملA 275-425 GHz Tunerless Waveguide Receiver Based on AlN-barrier SIS Technology
We report on a 275-425 GHz tunerless waveguide receiver with a 3.5-8 GHz intermediate frequency (IF). As mixing element, we employ a high-current-density Nb-AlN-Nb superconducting-insulating-superconducting (SIS) tunnel junction. Thanks to the combined use of AlN-barrier SIS technology and a broad bandwidth waveguide to thin-film microstrip transition, we are able to achieve an unprecedented 43...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Infrared and Millimeter Waves
سال: 1992
ISSN: 0195-9271,1572-9559
DOI: 10.1007/bf01011595