The Uhf Band Rfid Tag Chip Codec Circuit Design And Realization

RFID(Radio Frequency Identification)is one of the most widely adopted contactless automatic methods for target identifying. It has the virtues of contactless, read-write flexibility, speediness, high security, and is widely used in all kinds of application fields. With the development of information technology, RFID's applications increase rapidly and widely. And, RFID will become one of the fundamental technologies in the future information society. With the great development of global economy, especially the presentation and popularization of Logistics Network, All walks of life demand for ultra-high frequency (UHF) long-range RFID system, and it has become increasingly urgent. In China, the research and application of UHF long range passive tags is still in its infancy. During the following years of the development of Logistics Network, China will become one of the largest Electronic Product Code (EPC) consumers, and UHF RFID technology is just the core of EPC technologies. Therefore, this research is of great significance.This paper analyzed the air interface protocol of the UHF Radio Frequency Identification communication standard ISO/IEC 18000-6C carefully, discussed the encoding format and modulation method of the front and back communication link in the radio frequency identification systems in detail, laid a foundation for the design of the coding and decoding circuit of RFID tag chip to meet the ISO/IEC 18000-6C communication standard.Based on ISO / IEC 18000-6C standard, This paper completed the detailed design of the coding and decoding circuit of the RFID tag chip, the front-end and back-end design and verification of the coding and decoding circuit and the physical implementation.