| RFID (Radio Frequency Identification) is a technology that incorporates the use ofelectromagnetic or electrostatic coupling in the radio frequency (RF) portion of theelectromagnetic spectrum to uniquely identify an object. In recent yesar,it has beenwidely used in various of industrial manufacture and daily life,with its particularadvantage and huge potential.According to the application demands,this dissertationfocuses on the core technology of the RF/Analog front-end of hing-performance UHFRFID,including chip architecture,power link layers,performance optimization and lowpower analog front-end circuit design.Firstly, the fundamental theory and physical protocol of UHF (Ultra HighFrequency) RFID technology are discussed in this dissertation. Analyzing the functionof each module and the power link layers of the system, the solutions forhigh-performance and low power is designed.Secondly, according to the low power and high reliability application demands,optimized structure of the system is designed. For mod and démodémodules, PSKmodulation which can get more energy from the transponder and low-power highsensitive démodécircuit is designed. Measurement results the power consumption ofthe démodéis 1μW, and it can work at 420mV at least. For PMU(Power ManagementUnit),more reasonable structure is proposed. Current reference, Power management,Power on reset circuits are designed, simulation results and layout are provided. Thewhole circuit and layout based on TSMC 0.18μm 1P4M RF Mix-signal process isproposed and taped out.Thirdly, with the sample, measurement condition, method and results areintroduced.The coherence of the chip and the results of mod, démodéand PMU moduleis provided and analyzied. Measurement results that the chip can correspond withtransponder correctly, and the distance can reach 7m at read mode 1m at write moderespectively.Finally, the problem at testing is analyzed and the suggestion to improving theperformance of the chip is proposed. |
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