In this article a low profile asymmetrical slotted Ultra Wide Band (UWB) antenna is proposed for Wireless Body Area Networks (WBANs) applications. The antenna was fabricated using Printed Circuit Boards (PCBs). An improved radiation pattern was obtained with an optimized patch shape of the antenna that broadens the bandwidth and lowers the antenna’s profile. In frequency ranges from 2.50 GHz to 10.97 GHz simulation as well as measured results show that the reflection coefficient (S11) of the antenna is below -10 dB and increased impedance bandwidth of 126%. Furthermore, the impact of the proposed antenna has a negligible effect on the human membrane. The low-profile UWB antenna's time-domain behavior is investigated, and the results show that it is capable of transmitting and receiving pulse signals.