Accession Number : ADA299519

Title :   Dielectric Disk Radiating Elements.

Descriptive Note : Final technical rept. Apr 91-Sep 94,

Corporate Author : MISSISSIPPI UNIV UNIVERSITY DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Junker, G. P. ; Kishk, A. A. ; Glisson, A. W. ; Kajfez, D.

PDF Url : ADA299519

Report Date : AUG 1995

Pagination or Media Count : 113

Abstract : A new class of antennas, consisting of dielectric resonant cylinders located on a conducting plane, is investigated numerically and experimentally. The numerical formulation is applied to the problem of a dielectric body of revolution in the presence of an electrically thin wire, or in the presence of a slot aperture. The formulation enables one to compute the input impedance of practical dielectric-cylinder antennas, which are fed either by a probe at the end of a coaxial cable, or by a slot in the ground plane of a microstrip transmission line. Such computations were heretofore unavailable in the published literature. Experiments were performed to verify the impedance behavior as a function of frequency. The agreement with the numerical results is excellent for the wire-fed antennas but, for the slot-fed antennas, the measured values are strongly influenced by the details of the feeding arrangement. The slot-fed dielectric antennas will require further investigation before the influence of the aperture details is fully understood, and a satisfactory agreement between the theory and experiment is obtained.

Descriptors :   *DIELECTRICS, *CERAMIC MATERIALS, *ANTENNAS, *DISKS, INPUT, GROUND LEVEL, RADIATION, COMPUTATIONS, WIRE, FORMULATIONS, NUMERICAL ANALYSIS, TRANSMISSION LINES, MICROWAVES, ELECTRICAL PROPERTIES, CYLINDRICAL BODIES, RESONANCE, THINNESS, STRIP TRANSMISSION LINES, BEHAVIOR, IMPEDANCE, HORN ANTENNAS, BODIES OF REVOLUTION, COAXIAL CABLES, LENS ANTENNAS.

Subject Categories : Electrical and Electronic Equipment
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE