A high-gain rectenna based on grid-array antenna for RF power harvesting applications

Abstract

A novel rectenna based on the grid-array antenna is presented in this paper. The grid-array antenna provides the feasibility to tilt the radiation beam. Two isolated feed points are designed in the grid-array antenna so as to generate two different beams separately. In this way, the rectenna can harvest more wireless RF energy from different directions. Finally, a prototype is fabricated and measured. Under the power density of 1 μW/cm2, it can produce over 50 μW dc power when the incident angle of incoming wave ranges from −10° to 10° at the E-plane.