Utilization of low cost RF harvester circuit in harnessing electrical energy from multiband RF signals

Electromagnetic energy harvesting holds a promising future for powering up low power electronic devices in wireless technology circuits. This paper presents an RF energy harvesting system that can harvest energy from the ambient surroundings at the downlink radio frequency range of 700MHz, 850MHz, 900MHz, 1800MHz and 2100MHz band. The harvesting system aimed to provide a new generation and alternative source of energy for powering up low power devices, specifically remote devise. In this project, we will harness the freely available emitted radio frequency signals from different existing frequency bands used by telecommunication companies and utilize it by converting it into a usable DC power using linear rectangular patch antennas resonant at the specified bands and a converter circuit in the form of radiant energy collector for the purpose of optimization and conservation of energy thru the concept of reuse & recycle. It aims to create a device that maximizes the freely available radio frequency signals by using a low cost rectenna design and convert it directly to electrical energy and reduce the demand of electricity especially in areas with abundance of ambient RF signals. The research involves design, experiments, assembling and optimization of the circuit. The study is limited to variant output, as preliminary results due to certain variables. The study opens its door to future researches in which the regulation of the output voltage leads to the utilization of the energy in powering up low-powered sensors located in the facilities such as telecom room to lessen the operational expenses (OPEX).