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Implant-able wireless body area networks (WBAN) are a promising technology for health monitoring and treatment for patients requiring special care and monitoring, where sensors are placed inside the human body to carry out measurements which may include telemetry or video streaming. Ultra Wide- Band technology (UWB) is investigated as a candidate for the proposed implanted wireless body area sensor network due to its wide frequency spectrum and, hence, its low bit energy. UWB is introduced and then explored in terms of system constraints and circuit implementation. The main focus of the paper is to describe how applicable UWB is used for implant WBANs and to invite future work on designing a radio capable of being installed inside the human body for medical care and monitoring. We have presented the RF front end receiver in 0.25μm CMOS Silanna process.