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

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

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    1 Citation (Scopus)
    126 Downloads (Pure)

    Abstract

    Wideband receivers for the 3-mm band were developed for CARMA, the Combined Array for Research in Millimeter wave 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.

    Original languageEnglish
    Title of host publicationMILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VIII
    EditorsWS Holland, J Zmuidzinas
    PublisherSPIE - The International Society for Optical Engineering
    Number of pages18
    ISBN (Print)978-1-5106-0208-3
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA4 Article in a conference publication
    EventConference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy - Edinburgh, United Kingdom
    Duration: 28 Jun 20161 Jul 2016
    Conference number: 8

    Publication series

    NameProceedings of SPIE
    PublisherSPIE-INT SOC OPTICAL ENGINEERING
    Volume9914
    ISSN (Print)0277-786X

    Conference

    ConferenceConference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy
    CountryUnited Kingdom
    CityEdinburgh
    Period28/06/201601/07/2016

    Keywords

    • Receivers
    • microwaves
    • millimeterwaves
    • sideband separation
    • interferometer
    • quadrature hybrid

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