Single Antenna Changeover Switch for UHF RFID Communications and RF Energy Harvesting

With the increasing development of low power technologies, particularly wireless, RF energy harvesting to power such devices has become possible. UHF RFID is a versatile platform offering both an RF signal to harvest and a data communications link. A challenge is to efficiently share a single tag antenna for both harvesting and data communication duties. This paper demonstrates a practical design for efficiently switching and sharing a single UHF RFID tag antenna.