Introduction to Ultra Low Power Transceiver Design -- Channel Modeling for Wireless Body Area Networks -- Circuit Techniques for Ultra-Low Power Radios -- Architectures for ultra-low-power multi-channel resonator-based wireless transceivers -- Ultra-Low Power Wake-Up Radios -- Commercially Viable Ultra-Low Power Wireless -- Synchronization clocks for ultra-low power wireless networks -- Pulsed Ultra-Wideband Transceivers -- Human Body Communication Transceiver for Energy Efficient BAN -- Centimeter-Range Inductive Radios -- Near-Field Wireless Power Transfer -- Energy Harvesting Opportunities for Low-Power Radios.