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The recent increase in RFID usage coupled with the evolving IoT has revamped the need for Wireless Power Transfer (WPT). In this paper, a brief review of systems using WPT is offered including: RFIDs, inductively coupled systems and electromagnetic harvesters. A case study for phased array antenna beamforming and its benefits to wireless power transfer are given. A 3x linear patch array at 5.8 GHz...