RF Power Harvester Using a Broadband Monopole Antenna and a Quad-Band Rectifier

An RF energy harvester (rectenna) consists of a broadband monopole antenna and a quad-band rectifying circuit is designed to harvest EM wave energy in the frequency range of ۱.۴۱۲ GHz to ۸.۵۶ GHz, which covers GSM-۱۸۰۰, LTE-band, Wimax, Wi-Fi, and WLAN. The initial component of the rectenna is an antenna that includes a semi-circular radiating patch with ۸ circular stubs and a semicircle ground plane. The simulation results show the antenna has −۱۰ dB impedance bandwidth at ۷.۱۴۸ GHz (from ۱.۴۱۲ GHz to ۸.۵۶ GHz). The second part of the rectenna is a rectifier circuit with a quad-band matching network for RF to DC conversion. The rectifier benefits from a two-stage Dickson rectifier using Schottky diodes. The RF-DC conversion efficiency and output DC voltage are simulated, and the maximum output voltage of the rectifier with the optimum load resistance of R=۱۲ kΩ is ۷.۲ V, and the peak conversion efficiency is ۶۵.۳% when the input power to the rectifier is -۴ dBm at ۱.۷۱ GHz.

کلیدواژه ها:

Broadband antenna ، RF Energy Harvesting ، Rectenna ، Quad-band Matching network