Abstract
In this paper, two types of reconflgurable Dielectric Resonator Antennas (DRAs) are presented. The designs are based on rotating a Dielectric Resonator (DR), placed on the patch of the antenna, using a DC stepper motor connected to the DR to reconflgure the notch frequency, in the flrst, and the resonance frequency in the second design. The attained results are a UWB DRA with a reconflgurable notch in the 3.2{5.1GHz range that prevents interference to many narrowband systems in this range, and a DRA with a reconflgurable resonance frequency suitable for microwave and WiMAX applications. The characteristics of the designed antennas are investigated using HFSS and experimentally verifled. The computed and measured results are in good agreement, and the antennas meet their design criteria.
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