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Analysis of a dielectric resonator antenna in a cylindrical conducting cavity: te and tm modes

Analysis of a dielectric resonator antenna in a cylindrical conducting cavity: te and tm modes

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  • Author(s): X. Di 1 ; A.W. Glisson 2 ; K.A. Michalski 3
    • View affiliations
    • Affiliations: 1: National Center for Physical Acoustics, University of Mississippi, Oxford, USA
      2: Department of Electrical Engineering, University of Mississippi, Oxford, USA
      3: Department of Electrical Engineering, Texas A&M University, College Station, USA
  • Source: Volume 139, Issue 5, October 1992, p. 453 – 464
    DOI:  10.1049/ip-h-2.1992.0080 , Print ISSN 0950-107X, Online ISSN 2053-907X
© The Institution of Electrical Engineers
Published

A new configuration for a flushmounted resonator antenna is presented in which the antenna is formed by a conducting cavity with a dielectric post, and radiates through an annular slot in the upper ground plane. An aperture magnetic current integral equation is used to model the slot, and the effect of the post resonator and cavity are included via Green's function techniques. The formulation is presented for the azimuthally-independent TE and TM cases. The moment method is applied to the integral equation, and the complex resonant frequencies for the antenna structure are found by searching for the zeroes of the determinant of the impedance matrix in the complex-frequency plane. The radiation Q factor, slot-field distribution, and radiation field are subsequently computed at the resonant frequency. Various TE and TM modes have been investigated for different geometrical configurations.

Inspec keywords: integral equations; antenna theory; dielectric resonators; microwave antennas; Q-factor; cavity resonators

Other keywords: slot-field distribution; dielectric post; annular slot; TM modes; dielectric resonator antenna; flush-mounted resonator antenna; impedance matrix; radiation Q-factor; TE modes; Green's function; radiation field; complex resonant frequencies; upper ground plane; aperture magnetic current integral equation; moment method; cylindrical conducting cavity

Subjects: Single antennas; Waveguide and cavity theory; Antenna theory

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