Enhancement of received power in far-field microwave wireless power transfer

A parabolic dish reflector (PDR) is designed and fabricated to convert the plane wave to spherical wave at the focus. The performance of PDR made from aluminum and Polydimethylsiloxane (PDMS) coated with aluminum is carried out. It is observed that the performance of the PDR made from PDMS is same as that made from aluminum, thus the proposed PDR made of PDMS can replace the PDR made of aluminum and metal sheets, thus decreasing the cost and weight of the PDR. Also, an improvement in received power by 3.88 times is achieved with parabolic pyramidal horn antenna fabricated by authors as the Tx antenna and patch antenna with PDR as the Rx antenna compared to typical pyramidal horn antenna as the Tx and only patch antenna as the Rx antenna, i.e., the conventional method. Thus, the power density at the receiver end is also improved by using PDR.