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Sideband-separating MMIC receivers for observation in the 3-mm band

Lamb, James W. and Cleary, Kieran A. and Gawande, Rohit S. and Kooi, Jacob W. and Laxen, Michael P. and Plambeck, Richard L. and Reeves, Rodrigo A. and Kangaslahti, Pekka P. and Varonen, Mikko (2016) Sideband-separating MMIC receivers for observation in the 3-mm band. In: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. Proceedings of SPIE. No.9914. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 99140H.

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Wideband receivers for the 3-mm band were developed for CARMA, the Combined Array for Research in Millimeterwave Astronomy. Three cryogenic MMIC (monolithic microwave integrated circuit) amplifiers manufactured in InP 35- nm technology are combined in a block with waveguide probes and gain equalizers to cover the 80–116 GHz band. These are followed by a sideband-separating mixer that has two 17 GHZ wide outputs, for upper and lower sidebands. Each receiver has a feed horn followed by a circular-to-linear polarizer and orthomode transducer. The two polarizations are amplified by the cryogenic MMICs, and the outputs downconverted in sideband separating mixers, resulting in four 1–18 GHz channels that can be simultaneously correlated. The first receiver was tested in the lab, and on-sky tests conducted at CARMA. Measured noise temperatures were in the range 40–70 K, with a sideband rejection of about 15 dB.

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Additional Information:© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). We would like to acknowledge the invaluable work done by Mr. Stan Hudson at the Owens Valley Observatory machine shop in machining many of the parts described here. In particular, it took great perseverance to refine the process for machining the slots for the quadrature hybrids. Support for CARMA construction was derived from the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the James S. McDonnell Foundation, the Associates of the California Institute of Technology, the University of Chicago, the states of California, Illinois, and Maryland, and the National Science Foundation. CARMA development and operations were supported by the National Science Foundation under a cooperative agreement (grant AST-1140063), and by the CARMA partner universities
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Kenneth T. and Eileen L. Norris FoundationUNSPECIFIED
James S. McDonnell FoundationUNSPECIFIED
Caltech AssociatesUNSPECIFIED
University of ChicagoUNSPECIFIED
State of CaliforniaUNSPECIFIED
CARMA partner universitiesUNSPECIFIED
State of IllinoisUNSPECIFIED
State of MarylandUNSPECIFIED
Subject Keywords:Receivers, microwaves, millimeterwaves, sideband separation, interferometer, quadrature hybrid
Series Name:Proceedings of SPIE
Issue or Number:9914
Record Number:CaltechAUTHORS:20161114-151435470
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Official Citation:James W. Lamb ; Kieran A. Cleary ; Rohit S. Gawande ; Jacob W. Kooi ; Michael P. Laxen ; Richard L. Plambeck ; Rodrigo A. Reeves ; Pekka P. Kangaslahti ; Mikko Varonen; Sideband-separating MMIC receivers for observation in the 3-mm band. Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99140H (July 19, 2016); doi:10.1117/12.2233106.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72002
Deposited By: Ruth Sustaita
Deposited On:15 Nov 2016 23:15
Last Modified:03 Oct 2019 16:13

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