Design Of Digital Baseband Controller For Low-power UHF Passive RFID Tag

RFID wireless radio frequency identification technology is a newly developedautomatic identification technology from1960s. This technique can obtain itemsstored information and needn’t require directly contact with objects,the principle iselectromagnetic coupling.At present, the technology has been applied in many fields,such as: logistics and distribution, pharmaceutical and healthcare, non-contact ID card,asset management, manufacturing, automobile industry, animal identification, traffic,aviation industry, military and security.In this paper, we designed a kind of passive low power digital baseband controllerfor UHF RFID electronic tag. The paper first introduced the RFID system workingprinciple, the history and the prospects of this system. Then, the EPC C1G2protocolare introduced in detail, the low-power methodolody are aslo summarized in thispaper.The main part of this paper including: One is the digital baseband controllerdesign and realization which consisted of the front-end design, the back-end designand the validation. The front-end design includes: RTL coding, logical synthesis, andoptimization. The back-end design includes: layout, static timing analysis(STA) etc.And the GDS II masks are obtained after DRC and LVS, the verification results showthis design conforms to the requierments of the manufactures and protocol.The second important part is the low-power strategy of this design.The strategyincludes double edge trigger counter, pipeline structure, gate-level power optimization,clock gating etc. These methods reduced power consumption of the tag. Test resultsshow that it can support the basic command for the tag selection, inventory and theaccess.The chip was fabricated in SMIC0.18μm standard CMOS process with a diesize of470μm×450μm, and the final power consumption is11.91μW.