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Proceedings Paper

SIS mixier design for a broadband millimeter spectrometer suitable for rapid line surveys and redshift determinations
Author(s): Frank Rice; Matthew Sumner; Jonas Zmuidzinas; R. Hu; Henry G. LeDuc; Andrew I. Harris; David Miller
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Paper Abstract

We present some detail of the waveguide probe and SIS mixer chip designs for a low-noise 180-300 GHz double-sideband receiver with an instantaneous RF bandwidth of 24 GHz. The receiver's single SIS junction is excited by a broadband, fixed-tuned waveguide probe on a silicon substrate. The IF output is coupled to a 6-18 GHz MMIC low-noise preamplifier. Following further amplification, the output is processed by an array of 4 GHz, 128-channel analog autocorrelation spectrometers (WASP II). The single-sideband receiver noise temperature goal of 70 Kelvin will provide a prototype instrument capable of rapid line surveys and of relatively efficient carbon monoxide (CO) emission line searches of distant, dusty galaxies. The latter application's goal is to determine redshifts by measuring the frequencies of CO line emissions from the star-forming regions dominating the submillimeter brightness of these galaxies. Construction of the receiver has begun; lab testing should begin in the fall. Demonstration of the receiver on the Caltech Submillimeter Observatory (CSO) telescope should begin in spring 2003.

Paper Details

Date Published: 17 February 2003
PDF: 11 pages
Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); doi: 10.1117/12.459710
Show Author Affiliations
Frank Rice, California Institute of Technology (United States)
Matthew Sumner, California Institute of Technology (United States)
Jonas Zmuidzinas, California Institute of Technology (United States)
R. Hu, Univ. of Michigan (United States)
Henry G. LeDuc, Jet Propulsion Lab. (United States)
Andrew I. Harris, Univ. of Maryland/College Park (United States)
David Miller, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4855:
Millimeter and Submillimeter Detectors for Astronomy
Thomas G. Phillips; Jonas Zmuidzinas, Editor(s)

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