MMA RECEIVERS: SIS mixers
نویسندگان
چکیده
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 section 5.3.2.7.
منابع مشابه
MMA Memo #264 Local Oscillator Power Requirements for ALMA SIS Mixers
We discuss requirements for the local oscillator (LO) power specifically for Nb-based SIS mixers for the ALMA Project. The scheme of the LO power generation / distribution for ALMA receivers is discussed. LO power for Nb-base SIS mixer Performance of a SIS mixer is a function of DC bias and applied LO power [1]. We make a number of assumptions to simplify our estimation and to calculate the LO ...
متن کاملSaturation 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 کاملCharacterization of submillimetre quasi-optical twin-slot double-junction SIS mixers
We report on the continuing development of submillimetre quasi-optical slot antenna SIS mixers, which use two-junction tuning circuits. Direct and heterodyne Fourier transform spectrometer measurements have been performed to compare device performance with predictions. Demonstrated double-sideband receiver noise temperatures of better than 540 K at 808 GHz make these SIS mixers substantially be...
متن کاملCharacterization of Low-Noise Quasi-Optical SIS Mixers for the Submillimeter Band - Microwave Theory and Techniques, IEEE Transactions on
AbstructWe report on the development of low-noise quasioptical SIS mixers for the frequency range 400-850 GHz. The mixers utilize twin-slot antennas, two-junction tuning circuits, and Nb-trilayer junctions. Fourier-transform spectrometry has been used to verify that the frequency response of the devices is well predicted by computer simulations. The 400-850 GHz frequency band can be covered wit...
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...
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تاریخ انتشار 1999