The Research Of RFID Radiofrequency Analog Front-end Based On13.56MHz

The technology of Radio Frequency Identification is a automatic identification technology, it has gradually raised to mature since90years of20th century. It can achieve the purpose of target identification and data exchange by using Non-contact radio frequency signals, two-way communication. It has the advantage of fast, efficient, reliable, non line of sight reading and can work in harsh environments. It can be combined with computer, network, and communication technologies, and is considered to be one of the most development potential of the technology in the21st century.With the background of practical application of RFID technology, A13.56MHz-based RFID reader is designed in this paper based on in-depth understanding of the basic principles of RFID technology, structure, characteristics, and related theories. Some of the key Technology of RFID can be known deeply through designing this system.Basic concepts of RFID, Prospects, Works, related theories, Key Technologies are briefly introduced firstly in this paper. Basic composition and working principle of RFID are decrypted. This paper clarifies the working frequency of13.56MHz, RFID system, the physical mechanism and Communication Theory, and the ISO/IEC14443agreement is briefly analyzed. Hardware and software of the system is designed on the basis of the theoretical analysis. Hardware designing mainly includes radio frequency identification module circuit, micro-controller unit circuit, a serial communication circuit, antenna modules, and so on. Finally, the performance of reader performance is tested. Test results showed that:the reader supports ISO/IEC14443A agreement perfect, achieve the requirement of designing.