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This paper presents a rectenna (rectifier + antenna) design to harvest electrical energy for powering RFIDs from ambient electromagnetic radiation at the 2.45 GHz ISM band (WiFi, Bluetooth, RFID, etc.). The rectenna structure is formed by a miniaturize 2nd iteration Koch fractal patch antenna and two stage Dickson charge pump voltage-doubler rectifier circuit. The proposed rectenna achieves a small...
In this paper, a rectenna (i.e., rectifier + antenna), design is proposed and integrated with RFID sensors to harvest ambient power from the RF devices operating in the 2.4 GHz ISM band and convert it to DC. The proposed rectenna combines a two-stage Dickson zero-bias Schottky rectifier circuit with a miniature antenna. Measured performance for the rectifier is given and shown to be 70% efficient...
Active RFID sensors are increasingly replacing their wired counterparts. However, their need for batteries, high unit costs and vulnerability to harsh environmental conditions (i.e., vibration, shock, temperature) make the passive RFIDs a favored option, even if they are associated with shorter distance detections. In addition to their limited read range, current passive sensor tags are relatively...
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