Low-noise slot antenna SIS mixers
نویسندگان
چکیده
منابع مشابه
Saturation by Noise and CW Signals in SIS Mixers
In ALMA Memo 321, Plambeck points out that saturation (gain compression) is likely to be a significant factor limiting the calibration accuracy of ALMA observations. In this memo, saturation by broadband noise and CW signals is analyzed for representative SIS receivers operating at different frequencies. Many SIS mixers in current use are expected to exhibit a significant degree of gain compres...
متن کاملMMA RECEIVERS: SIS mixers
Revision History: 1998-09-21: Added chapter number to section numbers. Placed specifications in table format. Added milestone summary. 1999-04-09: Revised date format to conform to MMA standard. Updated milestone table. Added description of new SIS junction fabricator. 1999-04-15: Updated milestone table. Added Figs. 5.3.4(c) and 5.3.4(d). Added subsections 5.3.2.3.1 and 5.3.2.3.2. Revised sect...
متن کاملZmuidzinas and Leduc : Quasi - Optical Slot Antenna Sis
We describe a new quasi-optical SIS mixer designed for efficient radiation coupling. The mixer uses a twinslot antenna which has the advantages of a good beam pattern and a low impedance. The radiation and impedance characteristics of the antenna were obtained from a moment-method calculation. Tapered superconducting microstrip transmission lines are used to carry the radiation from the slot an...
متن کاملLow-Noise THz SIS Mixers Incorporating NbTiN/SiO2/Al and Al/SiO2/Al Tuning Circuits
The development of the Heterodyne Instrument for the Far-Infrared (HIFI) requires lownoise SIS mixers for frequencies up to 1.25 THz. Past work has shown that the integration of a NbTiN/SiO2/Al tuning circuit with standard Nb SIS junctions enables the development of state-of-the-art heterodyne receivers for frequencies up to at least 1 THz [1-3]. Following from the results of this previous work...
متن کاملLow Noise 1 THz–1.4 THz Mixers Using Nb/Al-AlN/NbTiN SIS Junctions
We present the development of a low noise 1.2 THz and 1.4 THz SIS mixers for heterodyne spectrometry on the Stratospheric Observatory For Infrared Astronomy (SOFIA) and Herschel Space Observatory. This frequency range is above the limit for the commonly used Nb quasi particle SIS junctions, and a special type of hybrid Nb/AlN/NbTiN junctions has been developed for this project. We are using a q...
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ژورنال
عنوان ژورنال: IEEE Transactions on Appiled Superconductivity
سال: 1995
ISSN: 1051-8223
DOI: 10.1109/77.403236