Sierpinski fractal inspired inverted pyramidal DRA for wide band applications.

In this paper, an inverted pyramid-shaped Sierpinski fractal Dielectric Resonator Antenna (DRA) is designed and investigated. The geometry is a Sierpinski Gasket with rectangle as a base element. Proposed fractal is applied on Rectangular DRA (RDRA) and bandwidth variation with three different orientations of DRA is investigated. Furthermore, design equations for this antenna are obtained in terms of its geometrical parameters such as fractal dimensions. Proposed structure with inverted geometry gives the optimized bandwidth and gain. The material used for investigation is Rogers "RT/Duroid 6010", which is a ceramic PTFE composite material having dielectric constant 10.2. Proposed geometry offers 66% impedance bandwidth (5.3-10.5 GHz) that is 5.2 GHz for ∣S11∣<-10dB at the resonant frequency of 7.38 GHz. The mode investigated is TEz21δ like mode of the RDRA. The maximum gain obtained is 6.56 dBi at 10.1GHz and the efficiency is above 81% for the entire band of operation. [ABSTRACT FROM AUTHOR]

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