A Novel Semi-Elliptical UWB Antenna with Parasitic Sinusoids

This paper presents, a novel miniaturized planar antenna for Ultra-wideband (UWB) Communication. The proposed antenna has novel semi-elliptical shape with sine-curve based parasitic structures and defected ground plane. The design not only covers the unlicensed (3.1–10.6 GHz) UWB band but also provides impedance match over licensed UWB band (10.6 GHz above). The proposed antenna achieves good radiation characteristics over desired band while maintaining over 3–4 dBi gain and compactness. The employed substrate is low profile FR-4 having miniaturized dimensions of 30 mm × 25 mm. The scattering parameters, radiation characteristics surface current distributions and overall better gain make it a potential candidate for UWB applications.