Abstract
An aperture-coupled hemispherical dielectric resonator (DR) antenna excited at the end-fire TE221 mode has been studied. The exact magnetic-field Green's function of the DR antenna is presented, and the moment method is used to solve the equivalent current in the slot. From the magnetic current, the return loss of the antenna configuration is evaluated. The results are compared with the single-mode results and measurements available in the literature. Compared with the single-mode theory, the solution of the present theory is very general in terms of the slot position and the frequency range.
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