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Flexible Irregular-Hexagonal CPW-Fed Monopole Antenna with Windmill-Shaped Fractals for Ultra-Wideband Technology

By Mohamed E. Yassin, Yousef Hassan, Olaoluwa Popoola, Moath Alathbah, and Shaimaa Mohassieb
Progress In Electromagnetics Research Letters, Vol. 113, 91-100, 2023


A novel flexible printed monopole antenna with a windmill-shaped fractal design, which is fed by co-planar waveguide (CPW) is presented in this manuscript for ultra-wideband (UWB) applications. By integrating a modified windmill-shape fractal into the conventional irregular hexagonal-patch, the antenna achieves a significantly wider impedance bandwidth extending up to 156.6% across the frequency band of 1.37-11.25 GHz. Additionally, increasing the number of the windmill-shaped fractals leads to the emergence of further resonances. The overall dimensions of the designed antenna are 50 × 70 × 0.2 mm3, and it boasts an impressive bandwidth-dimension ratio (BDR) of 4457, showcasing exceptional efficiency in utilizing its compact size. The maximum gain reaches 4.8 dBi, while the radiation efficiency attains an impressive 98%. The modified windmill-shape fractal antenna design leverages the multifractal concept, providing monopole antennas with enhanced flexibility in controlling resonances and bandwidth. This manuscript offers a comprehensive presentation and discussion of the process used to improve the impedance bandwidth, shedding light on the antenna's exceptional performance and capabilities.


Mohamed E. Yassin, Yousef Hassan, Olaoluwa Popoola, Moath Alathbah, and Shaimaa Mohassieb, "Flexible Irregular-Hexagonal CPW-Fed Monopole Antenna with Windmill-Shaped Fractals for Ultra-Wideband Technology," Progress In Electromagnetics Research Letters, Vol. 113, 91-100, 2023.


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