• DocumentCode
    386804
  • Title

    Energy considerations in open and closed waveguides

  • Author

    Laxpati, S. ; Mittra, Raj

  • Author_Institution
    University of Illinois, Urbana, IL, USA
  • Volume
    13
  • fYear
    1966
  • fDate
    21-25 March 1966
  • Firstpage
    140
  • Lastpage
    149
  • Abstract
    Energy relations derived for a lossless, closed uniform and periodic structure show that the total complex Poynting vector integrated over the cross section is identically zero for the case of an arbitrary complex wave. These results are also applicable to open structures provided certain conditions are satisfied. The application of these results in the field of leaky wave antennas is discussed. Two illustrative examples, those of the sinusoidally modulated reactance surface and the sheath helix, are worked out. It is shown that although the slope of the k-\\beta curve can no longer be associated with the direction of net power flows the knowledge of the slope may still be helpful in selecting certain modes for representing a given source.
  • Keywords
    Attenuation; Circuits; Equations; Helical antennas; Laboratories; Load flow; Periodic structures; Propagation constant; Reflection; Tensile stress;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    1958 IRE International Convention Record
  • Conference_Location
    New York, NY, USA
  • Type

    conf

  • DOI
    10.1109/IRECON.1965.1147511
  • Filename
    1147511