A Dual-Band Rectifier Design at 2.9 GHz and 5.8 GHz for Microwave Power Transmission

This paper presents a rectifier working at 2.9 GHz and 5.8 GHz. Simulation results reveal that the rectifier achieved a maximum rectifying efficiency at $80 \%$ within a 14 dBm input power at 5.8 GHz when the DC load resistance is $300 \Omega$. At 2.9 GHz, the maximum rectifying efficiency is $50 \%$ with a 13 dBm input power. The efficiency at 2.9 GHz is designed to be low intentionally, as part of the 2.9 GHz input power is converted to the backscattered power of 5.8 GHz. The strong backscattered 5.8 GHz power can be utilized in the power transmitter to configure a power beam toward the rectifier (using the backscattered 5.8 GHz signal to reconfigure the wireless power transmitter is not studied in this paper).