Theoretical analysis on designing Full Functional Device of WSN using Wireless Power Transfer

Wireless Sensor Network (WSN) is not completely autonomous and wire free, as Full Functional Devices (FFD), that are part of the network, require continuous power source (AC mains). The main aim of this paper is to make WSN completely wire free, fully autonomous and self sustainable system. This paper analyzes the feasibility of removing the power line (wired) connection for FFD of WSN. Theoretical calculation and analysis to design a low power FFD with good processing speed has been performed. The designed node can continuously operate in active mode on battery for 8 days (generally FFD will be always active). To make the device functional for longer duration energy harvesting (EH) solutions has been considered. Initially, solar was found to be the only such EH source. Later, Wireless Power Transfer (WPT) possibilities for WSN node has been analyzed, as solar power is available only for outdoor environment. Thus by EH solutions like solar along with WPT, power wire of a low power FFD can be eliminated.