International Journal of Science, Engineering and TechnologyAuthors: Subi S, Lekshmi Vijayan, Jyothi J S, Dhrisya S. Anil, Dr Abhilash S. Vasu
Abstract: An ultra-wideband (UWB) antenna is proposed using a combination of an elliptical-shaped patch and a slot structure. The antenna employs a coplanar waveguide (CPW) feeding technique, consisting of a central signal strip, two rectangular ground planes. The signal strip is directly connected to the elliptical patch and slot, which together function as the primary radiating elements responsible for achieving wideband operation. This integrated geometry enhances impedance matching and supports efficient radiation across the UWB spectrum, making the design suitable for compact and high-performance UWB applications. The antenna achieves a wide impedance bandwidth ranging from 3.44 to 11.17 GHz, as verified through return-loss analysis. Surface current distribution confirms that the elliptical radiating patch plays a dominant role in efficient radiation. The proposed design attains a peak gain of 4.40 dBi, making it suitable for UWB communication and sensing applications. The VSWR remains below 1.75 throughout the operating band, indicating superior impedance matching and reduced reflection losses. Additionally, the E- and H-plane polarization characteristics reveal low cross-polarization levels, ensuring stable and clean radiation patterns. Overall, the antenna demonstrates robust UWB performance with desirable attributes in bandwidth, gain, matching, and polarization purity.
DOI: https://doi.org/10.5281/zenodo.17863104
