Abstract
A high-efficiency rectenna is designed at 2.4 GHz. In general, a rectenna consists of an antenna, a band-pass filter, a rectifying diode, and a low-pass filter. In this article, to increase transmission efficiency, a high-directional antenna is developed using partially reflective surfaces. In addition, the harmonic rejecting band-pass filter is designed to suppress the second and third harmonic signal from the nonlinear diode, resulting in high conversion efficiency. It is experimentally demonstrated that the proposed rectenna achieves an RF to DC conversion efficiency of 72.17% when the received RF power is 63.09 mW at 2.4 GHz.
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