The RF energy Harvester with frequency reconfigurable microstrip patch antenna is presented in this paper. The antenna is design for ambient RF energy harvester system for two different frequency bands. The proposed antenna has two different frequency bands, to be reconfigurable at 1.6GHz and 2.4GHz using RF PIN diodes. The energy harvester is a simple rectifier circuit that converts RF energy to usable DC power for wireless charging device. The sufficient transmitted RF power is achieved from proposed antenna. The rectifier circuit with six stage gives DC voltage of 21V at 1.6GHz and 22V at 2.45GHz which is suitable for wireless charging Application. © 2016 IEEE.