UHF 915MHz Passive RFID Tag Circuit Conforming to EPC Class-1 Generation-2 RFID Protocol
Date Issued
2010
Date
2010
Author(s)
Huang, Wen-po
Abstract
In this thesis, an UHF 915MHz passive RFID tag circuit which conforms to EPC Class-1 Generation-2 RFID protocol is proposed by using TSMC 0.18µm Mixed Signal/RF 1P6M CMOS process. The passive tag consists of a voltage multiplier, a voltage limiter, a voltage reference, a regulator, an oscillator, a power-on-reset circuit, a demodulator, a modulator and a digital signal processing unit. The chip area only requires 0.62 x 0.57 mm2 with I/O pads. We present a dual-antennas architecture and decrease the power consumption to improve the communicating distance. By the measurement results, the passive tag can generate DC voltage 1V in -12dBm~20dBm dynamic range input power. This stable voltage can power up the other internal circuits and make them work regularly. The power consumption is approximately 11.2µW and the maximum communicating distance is 2.1m.
Subjects
RFID
Passive Tag
Transponder
RF to DC
Type
thesis
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