Design of RF Energy Harvesting Circuit at 900 MHz for Low-Powered DC Applications

This report describes the design of RF energy harvesting circuit using the 900 MHz microstrip patch antenna and the HSMS-285B Schottky diode rectifier. The aim of this circuit is to transform the radio frequency signals in the GSM frequency band to direct current (DC) voltage. This research also provides a guideline for the design of the 900 MHz microstrip patch antenna used in the circuit mentioned below. The rectifier design is based on the doubler circuit of Villard voltage developed at 900 MHz. Three-stage voltage doubling is modelled and simulated in this paper. The proposed antenna harvests the RF power and transforms it into DC voltage ranging up to 7.5 V that can be used in low-power DC applications. This paper cited a variety of parameters of antenna such as gain, radiation pattern and return loss of the envisaged antenna. Advanced Design System (ADS) and CST Microwave Studio were used to design and simulate the following circuit.