This paper presents the design and performance analysis of a compact ultra-wideband (UWB) antenna optimized for smart industrial applications. The proposed antenna achieves broad impedance bandwidth from 2 GHz to 10 GHz with omnidirectional radiation characteristics, making it suitable for diverse industrial environments requiring robust and seamless connectivity. Fabricated on a compact 30 mm × 25 mm FR4 epoxy, the antenna incorporates an L-shaped slot in the ground plane to enhance impedance matching and bandwidth without increasing its physical size. Experimental results demonstrate strong agreement with simulated data, showing |S11| values below −10 dB across the UWB range and stable gain levels from 2 dBi to 4 dBi. Three-dimensional radiation pattern measurements were conducted to assess the antenna’s performance comprehensively, confirming consistent omnidirectional coverage across key frequencies and ensuring reliable device communication in varied orientations. The proposed UWB antenna’s compact size, omnidirectional radiation, and broad bandwidth make it a promising solution for smart industrial systems, where spatial constraints and high-performance wireless connectivity are paramount.