Abstract
A wideband rectifier for ambient wireless energy harvesting is presented in this paper. By utilizing a new type of two-level impedance matching network, the rectifier can achieve high-efficiency rectification within a broad range of operation bandwidth (1.82.45GHz). A resonant inductor and L-type matching network are used to achieve impedance matching at a specific single frequency point. A band-pass matching network is then used to achieve impedance matching over the desired operation frequency band. Simulation results show that when the input power is -15dBm, the rectifier can achieve more than 30% rectification efficiency (1.75-2.45GHz). When the input power is -4dBm, it can achieve more than 55% peak rectification efficiency (1.8-2.5GHz). Its wideband and features suitable for low power environments make it widely used in environmental wireless energy harvesting.
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