A Wideband Dielectric Resonator Antenna

This paper presents a wideband dielectric resonator antenna (DRA) with three excited modes: the fundamental TEll1 mode and the higher-order TEll3 and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{TE}_{212}$</tex> modes, which are merged to achieve a wide impedance bandwidth. To demonstrate the design, an antenna prototype was developed, fabricated, and measured, showing reasonable agreement between the measured and simulated results. The prototype achieved a wide measured 10-dB impedance bandwidth of 64.6% (5.85-11.48 GHz) with stable broadside radiation patterns throughout the band.