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Abstract

Recently, wireless communication has been a crucial part of our daily life. Hence, this study focuses on RF energy harvesting where a small amount of the electrical power is generated to drive circuits in wireless communication electronics devices. This paper presents an optimum design of microstrip rectangular 2x2 patch array antenna with air gap and integrated with a double stage rectifying circuit which has the potential to be used for the RF energy harvesting system. A single and double stage rectifying circuit are designed and simulated. A prototype is then fabricated and measured to validate the simulation results. Simulation process mainly used EM simulator and measurement is carried out for various input power levels at frequency 2.45 GHz. An experimental measurement has been conducted by varying the load, R of the rectifying circuit. From the experimental measurement, it has been observed that the maximum DC voltage of 13.556 V and RF-DC efficiency of 78.57% are obtained from the energy harvesting system.