Waste of radio frequency signal analysis for wireless energy harvester

Abstract

Process by which energy is derived from external sources like thermal energy, wind energy and kinetic energy, captured and stored are called 'Energy Harvesting' or 'Energy Scavenging'.[1] Normally this method is applied to small autonomous robot, wearable electronic devices and wireless sensor networks. Firstly, radio frequency (RF) radiation is a subset of electromagnetic radiation with a wavelength of 100km to 1mm, which is a frequency of 3 KHz to 300 GHz, respectively.[2] This range of electromagnetic radiation constitutes the radio spectrum and corresponds to the frequency of alternating current electrical signals used to produce and detect radio waves. RF can refer to electromagnetic oscillations in either electrical circuits or radiation through air and space. Like other subsets of electromagnetic radiation, RF travels at the speed of light. The reasons that this project focus on Radio Frequencies Energies is that for starter, radio frequencies itself are electric energy that is transmitting though the air by ionizing the medium on its paths. The energy also can be easily found in our surrounding as it is used widely by many applications like television broadcasting, telecommunication and in microwave too. By using it availability, we are harvesting it and turning it into electrical energy although only small amount of it can be obtained.