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A metamaterial loaded circularly polarized fractal boundary patch antenna is investigated for applications at the ISM band. The suggested patch comprises of Minkowski fractal over metamaterial inspired reactive impedance substrate. Initially, asymmetrical Minkowski fractal curves are deployed at the edges of a square patch for generating the circular polarization (CP). Later, using metamaterial reactive impedance substrate as antenna loading, CP bandwidth is enhanced. The characteristics of the Minkowski fractals are adjusted to obtain the pure CP radiation. The metamaterial loaded Koch fractal antenna is also studied for CP emission. Minkowski antenna with fractal reactive impedance surface as metamaterial with iteration 1 is experimentally examined. The achieved 10-dB return loss and 3-dB axial ratio bandwidths are 40.7% and 7.47%, respectively.

Metamaterial Loaded Circularly Polarized Fractal Antenna for 2.4 GHz Frequency Applications