A fully integrated 3–5 GHz UWB RF transceiver for WBAN applications

A fully integrated 3-5 GHz CMOS UWB RF transceiver for wireless body area network (WBAN) is presented with the textile antenna in this paper. To achieve the low power and low complexity, OOK receiver topology and the digitally synthesized impulse generator are employed. For the rejection of the undesired interferers below 2.4 GHz, the tunable RF notch filter is integrated and the measured sensitivity shows 10 dB improvement of the sensitivity coexistent with the -30 dBm / 2.4 GHz interference. The transmitted UWB signal is generated in digital circuits, and both of the carrier frequency and bandwidth can be tunable. The measured energy efficiency of transmitter and the receiver sensitivity are 20.6 pJ/bit and -65 dBm, respectively. The measured maximum distance of communication is 1.5 m with the textile antenna in LOS channel.