An RF-DC Converter IC for Power Charging Application

RF-DC converter integrated circuits (ICs) are presented for RF energy harvesting and power charging. To achieve wide incident RF signal variations that sketch the directing frequency band, an adaptive impedance matching network is used. The proposed RF signal to DC converter is fabricated in 0.18-um CMOS process. The simulated performances present the proposed circuit achieves Peak Power Converting Efficiency (PPCE) of 27% at 0 dBm input power, across 50 k$\Omega$ load resistance and 1 pF load capacitance and can provide an output voltage of higher than 2 V.