rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: radiation zone fields of the stepped dielectric rod antenna excited in the HE₁₁ mode
  name:
    name part: York, Paul Kennedy.
    role:
      role term: creator
  name:
    name part: Barnard, Herbert M.
    role:
      role term: degree committee member.
  name:
    name part: German, John P.
    role:
      role term: degree supervisor.
  name:
    name part: Hallmark, G. D.
    role:
      role term: degree committee member.
  name:
    name part: Ham, Joe S.
    role:
      role term: degree committee member.
  name:
    name part: Klipple, E. C.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: theses
  genre: Academic theses.
  origin info:
    place:
      place term: txu
    date issued: 1967
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: 150 leaves illustrations
  abstract: In this work analytical expressions are determined for the radiation zone fields of the stepped dielectric rod antenna with HE₁₁ mode excitation. This type of antenna is similar to both the cylindrical dielectric rod antenna and the tapered dielectric rod antenna. This particular type of dielectric rod antenna consists of several cylindrical sections of dielectric material with different radii. The transition from one section to an adjacent section is achieved by means of an abrupt step in rod diameter. The analytical expressions for the fields of the antenna are obtained by two methods. In the first method, a continuous array of point sources is used as a model for the antenna. This approach allows the field pattern of the antenna to be determined by using an empirical expression for an unknown function of the angular coordinates. This function has little effect on the pattern in the vicinity of the principle lobe. In the second method, the exact form of this function and resulting fields of the antenna are determined from an application of an equivalence principle. In the equivalence principle approach, the fields on the antenna surface are assumed to be those of a forward travelling HE₁₁ waveguide mode. It is found that only the equivalent currents on the lateral surfaces of the antenna need to be considered except in the case of very short antennas. When the contributions of the equivalent currents on the section ends are required, the integrals for these contributions must be evaluated numerically. The field patterns calculated from the analytical expressions are compared with experimentally determined field patterns. The limitations on the analytical expressions for the fields with respect to the section lengths, overall antenna length, and the magnitudes of the steps in rod diameter are investigated. The measured field patterns are found to compare favorably with the computed field patterns provided the limitations placed on the analytical expressions are obs…
  note: Ph. D. in Electrical Engineering Texas A & M University
  subject:
    topic: Major electrical engineering
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-776305
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-776305
  record info:
    record content source: TXA
    record creation date: 791114
    record change date: 20220104090517.0
    record identifier: in00000770952
    language of cataloging:
      language term: eng