The emergence of ultra-wideband (UWB) technology, following the FCC’s allocation of the 3.1-10.6 GHz spectrum for unlicensed use, has significantly advanced short-range wireless communication, particularly in biomedical telemetry. This paper proposes a compact UWB microstrip patch antenna (32×32×1.6 mm³) designed for biomedical applications such as brain tumor detection, cancer screening, and health monitoring. The antenna incorporates a miniaturized radiating patch with stair-step and serrated slot structures, as well as a defected ground configuration to enhance impedance bandwidth and reduce electromagnetic interference. It achieves effective operation across the 2.48-10.8 GHz range... More >