A Survey Study of Different RF Energy Sources for RF Energy Harvesting

Radio Frequency (RF) energy conversion and harvesting topologies gains much attention that promises to operate the low power devices. The base of any RF energy harvesting model is the selection of appropriate RF souce followed by other three main stages which include receiving antenna, converting into DC output and utilisation of that output in any low-power applications. In this context, we present an extensive survey on the various RF sources (DTV, GSM, Wi-Fi) available in the frequency range of 3KHz -3GHz. This paper aims to review the progress of ambient sources which is expected to be useful in designing the RF energy harvesting model.