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Multiband SRR loaded leaf-shaped Koch fractal with a modified CPW-fed antenna

ABSTRACT In this article, a compact co-planar wave-guide (CPW) feed leaf-shaped Koch fractal antenna loaded with a circular split ring resonator (SRR) is presented. The proposed design consists of a leaf patch etched with Koch fractal (top) and an SRR loaded beneath the FR4, which are accountable for achieving multiple band characteristics, smallness, and fine impedance matching. The antenna dimension is 14×16×1.6 mm3 and is fabricated and tested. The testing results show that the design proposed, having −10 dB for 1.977, 3.19, 6.32, 8.814, 11.87, 15.69, and 18.3 GHz, respectively, covers L/S/C/X/Ku/K bands. It has good radiation characteristics for both E and H fields in all the operating bands and also it generates superior performances compared to the existing antenna in the reviews. The modified CPW-fed leaf-shaped Koch fractal SRR structure antenna is validated through negative permeability extraction and different parametric studies.