• DocumentCode
    2780030
  • Title

    Efficiency, gain and Q of antennas

  • Author

    Karlsson, Anders

  • Author_Institution
    Dept. of Electroscience, Lund Univ.
  • fYear
    2007
  • fDate
    21-23 March 2007
  • Firstpage
    384
  • Lastpage
    387
  • Abstract
    The fundamental limits of the gain, efficiency and Q-value of an antenna put severe restrictions on small antennas. In this paper it is discussed how one can avoid low efficiency and high Q-values in small antennas by examining the far-field pattern of the antenna. The analysis is based on the expansion of the electromagnetic fields in terms of vector spherical harmonics.
  • Keywords
    Q-factor; antenna radiation patterns; electromagnetic fields; antenna Q-value; antenna efficiency; antenna gain; electromagnetic fields; far-field pattern; small antennas; vector spherical harmonics; Azimuthal angle; Bandwidth; Dipole antennas; Electromagnetic analysis; Electromagnetic fields; Harmonic analysis; Impedance matching; Maxwell equations; Surface waves;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Antenna Technology: Small and Smart Antennas Metamaterials and Applications, 2007. IWAT '07. International Workshop on
  • Conference_Location
    Cambridge
  • Print_ISBN
    1-4244-1088-6
  • Electronic_ISBN
    1-4244-1088-6
  • Type

    conf

  • DOI
    10.1109/IWAT.2007.370155
  • Filename
    4227471
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2780030