• DocumentCode
    46290
  • Title

    High-performance microstrip directional coupler for radio-astronomical receivers at cryogenic temperature

  • Author

    Valente, G. ; Montisci, G. ; Mariotti, S.

  • Author_Institution
    INAF - Oss. Astron. di Cagliari, Cagliari, Italy
  • Volume
    50
  • Issue
    6
  • fYear
    2014
  • fDate
    March 13 2014
  • Firstpage
    449
  • Lastpage
    451
  • Abstract
    A microstrip directional coupler with high directivity is proposed for microwave applications requiring a weak coupling factor. This component has been used in the L-band radio-astronomical receiver of the Sardinia radio telescope. To improve the performance of the receiver, the operating temperature is lowered to 20 K. An in-house cryostat has been manufactured to perform measurements on the directional coupler, and very good agreement with the design specification is achieved.
  • Keywords
    cryogenic electronics; cryostats; microstrip directional couplers; radio receivers; radioastronomy; radiotelescopes; L-band radio-astronomical receiver; Sardinia radio telescope; cryogenic temperature; high-performance microstrip directional coupler; in-house cryostat; microwave coupler; weak coupling factor;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2014.0078
  • Filename
    6777243
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=46290