Research On Key Technology Of UHF RFID

RFID is one of identification technologies which can achieve intercommunication by using wireless channel. In recent year, RFID systems are applied in more and more fields, and they have been involved in many aspects of people's daily life. Comparing with 13.56MHz RFID system, 860MHz～960MHz RFID system has farther reading distance and faster speed, etc. Nowadays, it has become a hot spot in RFID research.International standards are guarantee for exploitation and application of RFID system. There are many institutions take part in setting RFID standards at present, these standards are not compatible.Setting a uniform standard is a key factor for RFID development, so research on standard is a hotspot in RFID technology research. Standards of UHF RFID, ISO/IEC18000-6 and EPC Class 1 generation 2 have global influence, they have been analysed in detail. The air interface, communication protocols, command and anti-collision arithmetic have been analysed . Paper compares these two international standards, the conclusion is useful for RFID system design.In this paper, we also have done researches in some key technologies of UHF RFID. ISO18000-6 gives rule that the reader and tag should use FM0 coding and PIE coding to communicate, their achievements have been put forward in this paper. Some suggestions of RFID system's EMC are provided. Antenna is key part of RFID system, we have made analysis to it, including many kinds of parameters of performance, paper also provides methods of antenna design.