DocumentCode :
2972221
Title :
Future of heterodyne receivers at submillimeter wavelengths
Author :
Chattopadhyay, Goutam
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Volume :
2
fYear :
2005
fDate :
19-23 Sept. 2005
Firstpage :
461
Abstract :
The astrophysics community is currently reflecting on the role heterodyne receivers at submillimeter wavelengths play in the next generation NASA missions. Even though they offer very high spectral resolution, they are intrinsically handicapped by quantum noise. With the proposed cold telescopes for the future NASA missions such as the SAFIR, the direct detector instruments have no longer be background noise limited, and outperform the heterodyne instruments in the sensitivity arena. In this review paper we examine these issues very carefully and describe the novel receivers being designed to make heterodyne instruments more competitive. It has shown that the heterodyne instruments still have significant roles to play in the near future.
Keywords :
heterodyne detection; quantum noise; submillimetre wave receivers; superheterodyne receivers; cold telescopes; detector instruments; heterodyne instruments; heterodyne receivers; high spectral resolution; quantum noise; submillimeter wavelengths; Astrophysics; Detectors; Gratings; Instruments; NASA; Observatories; Spectroscopy; Submillimeter wave devices; Submillimeter wave technology; Telescopes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
Type :
conf
DOI :
10.1109/ICIMW.2005.1572612
Filename :
1572612
Link To Document :
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