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RF power harvesting enables controllable and simultaneous wireless power delivery to many RF devices. Devices built with this unique technology can be sealed, embedded within structures, or made mobile, thus eliminating additional service for a battery. A key component of this technology is the "rectenna," which is composed of antennas and rectifying circuitry to convert RF energy into dc...
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...
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