Ambient Radio Frequency energy harvesting

Abstract

This paper is based on the experimental approaches of designing whole block of RF (Radio Frequency) energy harvester for powering low power devices. So includes worked done, results obtained, conclusions and suggestions for further improvements. This design consists of three main parts transducer, energy conditioning unit and energy storage unit. The transducer converts RF energy into electrical form which is then easier to condition and store. Three types of antennas used as transducer. Before store energy into a storage unit, conditioning subsystem rectifies and increases the voltage level up to a desired level. In reality available RF energy varies with the time. So store energy into a storage unit which is a super capacitor is done as far as harvesting. Devices such as wireless sensor nodes, calculators, remote controllers and phone chargers which consume extremely low energy during its employment are the most suitable devices to energize. Using sufficiently efficient system it is possible to energize selected low power devices using RF energy.