A hybrid Dielectric Resonator Antenna (DRA) design using the concept of the Dielectric-Resonator-on-Patch (DRoP) is presented in this thesis. This design is introduced to overcome the narrow bandwidth and big size drawbacks experienced by the antennas in the UHF band applications. The hybrid DRA has the ability to provide wide bandwidth while maintaining its compact structure. Firstly, two antenna designs which are the aperture-coupled square microstrip patch antenna (RMPA) and dielectric resonator antenna (RDRA) are presented to investigate the characteristic of the antennas individually. Two different aperture shapes, rectangular and circular are used to clarify the difference between them. Then, both antennas are combined together into the hybrid DRA structure. All three antennas are designed and optimized using Computer Simulation Technology (CST) microwave studio software and the Taconic RF-35 is used as the substrate for the prototype fabrication. The antenna performances such as the reflection coefficient magnitude (S11), bandwidth, radiation pattern and gain are measured. In the RMPA design, both configurations managed to obtain a compact size, with a reduction of more than 25% compared to the reference antenna. On the other hand, by maintaining the size of the DRA at 7cm × 7cm × 1.4cm, a wide bandwidth of around 30% is recorded using the circular aperture in the RDRA design. The hybrid DRA combined both RMPA and RDRA, resulting in wider bandwidth of 60%, from 0.77 to 1.43GHz with an average gain of 3.4dBi. The dimension of the dielectric resonator antenna is compact, which is 0.257?o and also low-profile with a height of 0.051O.
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