This work demonstrates the design of a rectenna to operate over wide dynamic input power range. It utilizes an adaptive reconfigurable rectifier to overcome the issue of early breakdown voltage in conventional rectifiers. A depletion-mode field-effect transistor has been introduced to operate as a switch and compensate at low and high input power levels for the rectifier. In addition, a meandered monopole antenna has been exploited to collect RF energy. The rectifier design achieves 40% of RF-DC power conversion efficiency over a wide dynamic input power range from -17 dBm to 27 dBm and the antenna exhibits a directivity of 1.92 dBi as well as a return loss of -33 dB. The rectenna is designed to operate in the 900 MHz ISM band and suitable for Wireless Power Transfer (WPT) applications.

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Keywords Rectifier, Schottky diode, wireless power transfer, wirless power sensor
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Conference 2016 IEEE Electrical Power and Energy Conference, EPEC 2016
Almohaimeed, A.M., Yagoub, M.C.E., & Amaya, R. (2016). Efficient rectenna with wide dynamic input power range for 900 MHz wireless power transfer applications. In 2016 IEEE Electrical Power and Energy Conference, EPEC 2016. doi:10.1109/EPEC.2016.7771757