In this paper, a rectenna is introduced by making use of an adaptive rectifier topology and a low-cost metasurface based printed antenna to cover a wide-range of input power levels. The low-cost metasurface printed antenna is based on flexible substrates while the rectifier can handle a wide input power range by employing a FET as a switch between low power and high power, which overcomes issues related to failure voltage in conventional rectification devices. The proposed rectifier attains an RF-DC efficiency of more than 40% for an input power ranging from -8 dBm to 25dBm. At 15 dBm, it demonstrates a peak power efficiency of 66% at 915 MHz. The low-cost metasurface-based printed antenna achieved a gain of 3 dBi, a directivity of 5.3 dBi and a radiation efficiency of 57%. The rectenna achieved 40% efficiency over a wide-range of input power from -5 dBm to 23 dBm, making it suitable for Wireless Power Transfer applications.

Diode, Metasurface, Rectenna, Rectifier, WPT
dx.doi.org/10.1109/CCECE.2018.8447782
2018 IEEE Canadian Conference on Electrical and Computer Engineering, CCECE 2018
Department of Electronics

Almohaimeed, A.M. (A. M.), Yagoub, M.C.E. (M. C.E.), Lima, J.A. (J. A.), Amaya, R, Xiao, G. (G.), & Tao, Y. (Y.). (2018). Metasurface-Based WPT Rectenna with Extensive Input Power Range in the 900 MHz. In Canadian Conference on Electrical and Computer Engineering. doi:10.1109/CCECE.2018.8447782