Design of a Multi-band Sierpinski Carpet Fractal Antenna With Modified Ground Plane

A multi-band Sierpinski carpet fractal antenna with a modified ground plane is designed. Fractal shapes are applied on the both sides of the antenna to achieve multi-band characteristics. Sierpinski carpet fractal with iteration-3 is applied to the rectangular-shaped radiating patch. Here, the novelty of the proposed design is the modified ground plane. The ground is modified through the same fractal shape of the patch (i.e., Sierpinski here) up to 2nd iteration as defected ground structure (DGS) on a partial ground to get more resonant bands over the range of 4 GHz to 12 GHz. Moreover, partial ground helps to get better input impedance matching at the resonance frequencies. The overall dimension of the proposed structure is 45 mm x 60 mm x 1.60 mm. The proposed antenna operates at six resonant frequencies (6 GHz, 6.42 GHz, 7.09 GHz, 7.63 GHz, 9.15 GHz, and 10.11 GHz) over the range of 4 to 12 GHz with good impedance matching, good gain and efficiency. The design is suitable for different applications of C- and X-bands.