Analysis of a SingleFrequency MultiChannel Ambient RF Energy Harvesting in CMOS Technology This paper proposes a single frequency multichannel RF energy harvesting (RFEH) system capable of increasing the power harvesting density and sensitivity performance. Alternatively, the power summation of the multichannel RFEH system is investigated to determine the electrical characteristics in the output power density and output voltage with respect to varying input power level conditions. The RFEH system was simulated on a standard 65 nm CMOS technology and the simulation results show that by combining the power from each RF harvesting branch of the same frequency, the output power density is increased by 1.74x. In addition, better performance in the sensitivity down to 20.4 dBm for a Vout of 1V of the multichannel RF harvesting is observed when compared to single channel harvesting.

A UHF SemiPassive RFID System with PhotovoltaicThermoelectric Energy Harvesting for Wireless Sensor Networks A semipassive ultrahigh frequency (UHF) radio frequency identification (RFID) system is presented. The reconfigurable architecture of tag is proposed to be compatible with passive and active operating modes. The read range of RFID system and the lifetime of tag is increases by frequency locked onchip oscillator topology. The transceiver is implemented in 0.18xc2xb5m standard CMOS process. The sensitivity of tag is xe2x88x9218dBm for passive mode and xe2x88x9240dBm for active mode with 1.2xc2xb5W power consumption under the supply voltage of 0.8V. The output power is xe2x88x9210dBm for active transmitting mode and the power consumption is 450xc2xb5W under the supply voltage of 1V.