An Enhanced Rectenna Using Differentially Fed Rectifier for Wireless Power Transmission
This letter presents an enhanced rectenna with a differentially driven rectifier for wireless power transmission applications. By utilizing differential feeding, a patch antenna with increased gain is proposed. To be directly connected with the differentially fed patch antenna as a rectenna, a differentially driven rectifier is designed so that the use of balun can be omitted. The rectenna shows a maximum efficiency of 73.9% under the input power density of 207 mW/cm2. Furthermore, compared with a reference rectenna of the same aperture size, the proposed rectenna performs higher efficiency and yields larger output DC power, which is more than 1.5 times as high as that of the reference rectenna.
IEEE Antennas and Wireless Propagation Letters