Date Added: May 2013
Wireless sensor node is one of the important technologies for the recent world applications like military, agriculture, health, etc. But the major problem associated with these nodes is their battery dependence. The battery dependence for such nodes responds to the life time of the complete node. Failure of network due to node failure occurs when the battery completely depleted. To beware from such conditions for critical conditions there is one more option of Energy harvesting. In this paper the authors have discussed about many kinds of energy harvesting procedures. RF energy harvesting and related work discussion are the major issues which they have discussed in this paper.