A high efficiency CMOS RF rectifier for RF energy harvesting with dynamic self-body-biasing technique

Abstract

In this paper, a radio frequency (RF) rectifier is proposed for RF energy harvesting. The proposed rectifier adopts a dynamic self-body-biasing technique to modulate the threshold voltage of MOSFET. It can improve the power conversion efficiency (PCE) of the rectifier. Designed with SMIC 0.18 µm CMOS standard process, simulation results indicate that the proposed rectifier has higher PCE than conventional cross coupled rectifier when the input power is larger than −14 dBm. The PCE of proposed rectifier achieves 72.3% when the input power is −3.7 dBm.