The simulation of an appropriate antenna design for energy harvesting using RF is the subject of this paper. The limitations imposed by energy storage and connected power supplies have caused the development of energy harvesting technology to proceed slowly in recent years. The energy harvesting is nearly impossible to end as a source from environment around us as we all know that there are radio frequency which is always present in our environment. In the recent decades, the energy source which are emitted from sources like wind energy, solar energy and RF energy are used and can be used as a never-ending energy source for some electronic appliances. This research focuses on the 2.45 GHz RF energy harvesting that occurs in the Wi-Fi frequency. the antenna which receives the signal RF-range radio signal. The position of the antenna is crucial because the field strength is greater close to the earth station than farther away.