The Design And Realization Of UHF Laser Holographic RFID Labels

The radio frequency identification（RFID） technology has risen and developedsince the1990s. Furthermore it is to be a gradual automatic recognition technology. Ittransfers information using its single of radio frequency through space coupling withouttouch, and it achieves the goal of identification through the information transferred.RFIDtechnology has characteristics of identify fast-moving objects, identify the characteristicsof multi-objective and non-contact identification. RFID technology has been widelyapplied not only in the field of logistics management, health care, payment, and also has avery broad application prospects in the field of security. Conventional laser holographiclabel is easy to be read, but it has a low degree of anti-counterfeiting, RFID tags has ahigh degree of security the security but its reading requires special equipment, socombining the laser holographic labels and RFID tags makes them to learn from eachother, and can become a kinds of anti-counterfeiting labels with multiple security features.Laser hologram with a metal layer, a layer of metal coating interested RFID tag antennaoperating a large impact, seriously affects the performance of the RFID tag. Therefore, todesign a laser holographic RFID tag having a double security feature is what the papershave to do.Firstly, this paper studies the theoretical and design method of the RFID tag antenna.It focuses on the tag design, impedance matching and antenna impedance test. In thestudy of passive UHF RFID tag antenna design, in order to achieve the maximumefficiency of power transfer, the antenna impedance and chip impedance mutuallyconjugate. The antenna impedance is calculated by the electromagnetic simulationsoftware and then tested using the vector network analyzer.Secondly, the articles presented the designing and optimized methods of UHF RFIDtag antenna based on the Dipole antenna miniaturization. The dipole antenna has simplestructure, good performance, so it is widely used in RFID. This paper, on the basis of thedipole antenna design and impedance matching, advises optimized method based on theparameters of the antenna structure, then combining simulation and prototype, shows thatthe design and optimization method is effective.At last, the article proposes a design of RFID tags embedded holographic label, on the basis of the anti-metal RFID tags designing principles. There is a metal layer inholographic label that brings seriously affects to the performance of common UHF RFIDtags. This article proposes coplanar inverted F antenna, designed for RFID tags, and theholographic label is pasted onto the ground of the antenna. Several prototypes testingresults show that the designing of RFID embedded holographic label has a goodperformance.