An electrosurgical energy delivery apparatus includes an energy deliverycircuit, acontrol circuit and an energy-harvesting system with a plurality of energy-harvesting circuits anda voltage regulator that provides a regulated DC voltage to the energydelivery circuit and/or thecontrol circuit. The energy delivery circuit receives an electrosurgicalenergy signal having aprimary frequency and selectively provides the electrosurgical energy signalto an energydelivery element. The control circuit connects to the energy delivery circuitand selectivelyenables the flow of electrosurgical energy to the energy delivery element. Theplurality ofenergy-harvesting circuits each include an energy-harvesting antenna tuned toa particularfrequency, a matched circuit configured to receive an RF signal from theenergy-harvestingantenna, rectify the RF signal and generate a DC signal, and an energy storagedevice thatconnects to the voltage regulator to receive and store the DC signal.
