Abstract
A novel rectifying metasurface presented that features high efficiency
at low power applicable to wireless power transfer and energy
harvesting. The proposed rectifying metasurface
is a two-sided structure consisting of modified electric
inductive-capacitive unit cells on one side and a rectifying circuitry
on the other, designed to resonate and rectify at 2.45 GHz. Each unit
cell is directly connected to a voltage doubler rectifier, allowing the
incident microwaves to be directly rectified upon reception. The
impedance characteristics and rectification performance of the proposed
rectifying metasurface are tested via numerical simulation
and measurement, respectively. The measured results demonstrate the
overall conversion efficiency electromagnetic power absorption +
rectification) of 75% at 0.4 dBm incident power.