RF Energy Harvesting and Storage System of Rectenna: A Review

Abstract

Objectives: In this paper, a discussion of different types rectennas (antenna + rectifier) which is used for different type of RF energy harvesting ambient signals and storage system. Methods/Statistical Analysis: RF energy can be harvested in the ISM unlicensed band from various ambient source in particular from mobile radio transmitters, Wi-Fi networks, wireless devices (laptops). The RF energy is captured using antenna preferable patch antenna. The received signal is converted into DC voltage using a impedance matching circuit and a voltage multiplier. Received output voltage is enhanced using various methods in order to make it sufficient to charge low power devices. Findings: After the literature review it has been observed that antenna designed to harvest RF energy should have high efficiency, gain and impedance matching with rectifier circuit. Applications: Rectennas find their application in Sensor networks, small wireless devices which needs power which should be portable. Keywords: Patch Antenna, Rectenna, RF Energy Harvesting