Energy Harvesting and Management from Ambient RF Radiation

Abstract

The energy harvesting from external ambient sources e.g. wind, solar, vibration, heat, Radio
Frequency (RF) are emerging as promising alternative to existing energy resources. In recent years, the huge
proliferation of RF/mobile communication in developing country like India has made RF energy harvesting as
an attractive solution to the dramatically increasing energy needs. Energy Harvesting is the process of
electronically capturing and accumulating energy from a variety of energy sources deemed wasted or otherwise
said to be unusable for any practical purpose. More often than not, these residual energies are released into the
environment as wasted potential energy sources. Wireless sensors and the potential of energy harvesting to
provide power for the life of these devices. The greatest potential, however, lies in a new class of devices that
will be battery-free and thus enable applications that would have been prohibitively expensive due to the
maintenance cost of eventual and repeated battery replacement. This project deals with the harvesting of
energy based on the RF source here the power is transfer from the antenna, there by using the impedance
matching is done. Hence this project deals with the harvesting of energy based on the RF source here the
power is transfer from the antenna, there by using the impedance matching is done so that to gain more power
from tower and the rectifier circuit convert an incoming RF signal to DC signal that is fed into battery and an
efficient rectification improves the output power.