• DocumentCode
    1015844
  • Title

    Range-testing a conical logarithmic spiral antenna for a dual-polarized riometer

  • Author

    Wilkinson, W.J. ; Vaneldik, J.F. ; Routledge, D.

  • Author_Institution
    Univ. of Alberta, Edmonton, AL, Canada
  • Volume
    26
  • Issue
    6
  • fYear
    1978
  • fDate
    11/1/1978 12:00:00 AM
  • Firstpage
    870
  • Lastpage
    872
  • Abstract
    The off-axis axial ratios and the radiation patterns of conical log spiral models have been examined experimentally at a single frequency with the objective of finding a circularly polarized antenna of small physical height, suitable for use in decametric dual-polarized riometers. Truncation of a narrow-cone-angle spiral produced rapid axial-ratio degradation below 0.75 \\lambda height in tests performed at 960 MHz. A wide-cone-angle configuration was found, however, with all the characteristics desired, particularly axial ratio \\cong 1.25 out to 50\\deg zenith angle, with height only 0.16 \\lambda .
  • Keywords
    Antenna measurements; Conical antennas; Ionospheric measurements; Log-spiral antennas; Absorption; Antenna theory; Aperture antennas; Microwave antennas; Optical surface waves; Polarization; Power measurement; Reflector antennas; Spirals; Surface waves;
  • fLanguage
    English
  • Journal_Title
    Antennas and Propagation, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-926X
  • Type

    jour

  • DOI
    10.1109/TAP.1978.1141959
  • Filename
    1141959
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1015844