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A Novel Design for Compact Multi-Band Antenna Based on Fractal Geometry and Metamaterials

Using fractal geometry and metamaterials structures in antenna design have been attracted many antenna designers, they help improve antenna parameters such as bandwidth, reduced size, multi-band operation. This paper presents an antenna design based on a combination of both techniques to create a compact size antenna with three resonance frequencies in the S-band. Optimized Minkowski fractal island antenna uses a defected ground structure (DGS) as a ground plane. The antenna was designed on Rogers RT/duroid 5880 microwave laminate with dielectric ε = 2.2 and thickness h=1.57mm. The dimensions of the final antenna are 21 19mm2, has been reduced by approximately 67% compared to conventional square patch microstrip antennas. The antenna operates at three resonant frequencies f1= 1.91GHz, f2=2.44 GHz and f3=3.09GHz with return loss S11<-15dB at 50-ohm input impedance, and the power gains G>3dB. Design and simulated results agree favourable…