Abstract
In this paper, design of an ultrawideband (UWB) stacked fractal tetrahedron shaped dielectric resonator antenna (DRA) is proposed. Fractal slots of triangular shape are created to achieve wide bandwidth (BW). To further improve the bandwidth of DRA, stacking of two different DR materials is considered along with introduction of small parasitic conducting patches. The combination of fractal design, stacking and use of parasitic patches helps in achieving the UWB performance. About 116.7% simulated impedance bandwidth covering frequency range from 3.5 to 13.3 GHz (entire C-and X-band) is achieved. Average gain of about 7 dBi and 98.8% radiation efficiency over the entire band of interest are achieved. All designs parameters and its associated results are included in the paper.
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