The present disclosure relates to method (1000) and system (100) for optimizing energy transmission comprising source node (100) for transmitting RF signal at first frequency, an intermediate node 200 for routing the RF signal to target node (300), intermediate nodes 200 comprises active antenna (202) for amplifying RF signal for obtaining amplified RF signal, digital phase shifter (208) for adjusting phase of amplified signal for generating amplified phase shifted RF signal according to feedback signal received from the target node (300), and the active antenna 202 is transmitting the amplified phase shifted RF signal to target node (300) for harvesting energy. The phase adjustment at the energy router 200 is based on feedback received from the target node (300), so that the RF signals can be combined in constructive manner at the target node (300) to maximize the energy harvesting efficiency of the target node (300).