A 950-MHz Rectifier Circuit for Sensor Network Tags With 10-m Distance

Radio-Triggered Power Management in Wireless Sensor Networks

“…Compared with the schemes proposed in the literatures [3,5,9,11,14,17], our proposed scheme is the first one that uses the discrete components to realize the design and achieves as good as or even better performance. It's cheaper and more flexible and can be applied to different WSNs applications with little change.…”

“…Although the power consumption is much less than many state-of-the-art normal radio transceiver, which typically use 2-3 V supply voltage and consumes 20-90mW, this solution still consumes significantly high power consumption while staying always-on. Some literatures [3,5,9,11,14,17] present the design of the power harvesting circuit for the radio frequency identification devices (RFID) chip. They adopt the high efficiency rectifier to realize the RF to DC signal transformation.…”

“…Because the peak voltage of the RF signal at the input of the rectifier is very low, we adopt the multistage rectifier in the design. Some papers have studied the rectifier design for passive RFID tags [14,17]. However, all of them use CMOS process to design a chip to realize the function.…”

A Design of a High-Performance Analog Front-End for Passive UHF RFID Tag EPC C1G2

“…The RFID tags are classified into three types of RFID tags, especially passive [4], [5], semi-passive [6], or active. The active RFID tags are used in some applications due to their higher communication range and their simpler structure where there is no need to extract power from the input signal.…”

A hybrid threshold self-compensation rectifier for RF energy harvesting

“…The threshold voltage compensation technology is proposed to improve the performance of the RF rectifier. Umeda et al [1] and Li Bo et al [2] compensate the threshold voltage by using auxiliary circuits to generate gate bias voltage. However, the efficiency decreases a lot due to the current consuming by the auxiliary circuits.…”