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Radio frequency identification (Radio Frequency Identification, RFID) technology is a non-contact automatic identification technology using RF communications. At present, the domestic UHF RFID technology is still in its infancy, especially ISO18000-6 standards-based electronic label study of the 915MHz band is still a blank. 915MHz frequency in our country happens to be in the public mobile communications band within the band of wireless research and applications have been more mature, so the electronic tags to study the ISO18000-6 standards with high practical significance. This paper studies the ISO18000-6 standards, its 915MHz RFID electronic tags specified physical interface, protocol and command, as well as anti-collision mechanism were analyzed. According to the provisions of the standard, the design of a system configuration of the electronic tag, dividing the system module, and the circuit design and the antenna, RF interface, and digital control module. Article, focusing on the RF interface module circuit detailed design and EDA simulation, mainly comprises a power generating circuit, reset circuit, a clock extraction circuit, reverse scattering modulation circuit and the envelope detector demodulation circuit. Meanwhile, Type B types of electronic tags, for example, the analysis and design of digital control section, including the Manchester decoding module FMO encoding module, CRC data checksum module, state machine module, EEPROM module and anti-collision algorithm and so on. At the same time, the paper also system level simulation using Matlab simulation tools 915MHz RFID electronic tags. Paper, through the SIMULINK communication simulation model library to build a simulation model, system-level simulation of the transmit and receive circuits in the time domain, frequency domain simulation of electronic tags through the M-file programming. The simulation not only from the perspectives of both time domain and frequency domain to verify the completeness and accuracy of the system design, intuitive and clear signal points for the development and design reference. Design 915MHz RFID electronic tags, uses a circular microstrip antenna RF front-end antenna, the reactance characteristics suitable for power consumption and radiation requirements more stringent electronic tags; complex RF interface circuit, the chip module is used to realize the function of each part, not only to reduce the development cycle and risk, also greatly reduce the the tag chip's power consumption, in theory, be able to improve tag identification distance; digital control circuit maximize the use of simple programming, design and smaller power circuit. Meanwhile, the selection of a good EDA simulation tools - Multism software circuit schematic design and system simulation, not only intuitive and clearly shows that the various parts of the signal, and effectively reduce the risk of the overall system design.
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