A Dual-band Microwave Energy Harvesting Rectenna System for WiFi Sources

A compact dual-band Microwave Energy Harvesting (MEH) System is proposed in this article, in which omnidirectional antenna system is presented to receive the available radiation from WiFi routers at 2.4 GHz and 5.2 GHz frequency bands. The antenna system is followed by a Schottky diode-based rectifier to transform the received RF signal into a pulsating DC signal. To provide the proper impedance matching between antenna and rectifier, Frequency-Dependent Complex Load (FDCL) based impedance matching network is also proposed. By introducing the impedance matching network, Power Conversion Efficiency (PCE) of 64.04% at 2.4 GHz and 9.15% at 5.2 GHz is achieved for the overall rectenna system. Detailed investigation of various results such as S-parameter, Gain, radiation properties of the antenna, and Power Conversion Efficiency, is done in this paper.