The topic of my thesis is development of a wireless sensor circuit powered by harvested RF energy. The sensor curcuit
gathers the required energy exclusively from the electromagnetic waves of a TV broadcast transmitter. My thesis offers a literature review of recent advances in the topic, and presents the design and development of the required modules for an energy harvesting sensor node. These modules are the high-efficiency rectifier which, together with the antenna, forms the rectenna; the switchmode boost converter that transforms the very low voltage levels provided by the rectenna to more usable voltages, and finally the wireless sensor itself. I also present my own time-domain simulator for the design and optimization of the diode rectifier. The developed modules are characterized by measurements.