Ultra Low Power Transceiver for Wireless Body Area NetworksWireless Body Area Networks (WBANs) are expected to promote new applications for the ambulatory health monitoring of chronic patients and elderly population, aiming to improve their quality of life and independence. These networks are composed by wireless sensor nodes (WSNs) used for measuring physiological variables (e. g., glucose level in blood or body temperature) or controlling therapeutic devices (e. g., implanted insulin pumps). These nodes