Article

Antenna design for UHF RFID tag: A review and a practical application

RFID Intellitag Eng. Dept., Intermec Technol. Corp., Everett, WA, USA
IEEE Transactions on Antennas and Propagation (Impact Factor: 2.18). 01/2006; 53(12):3870 - 3876. DOI: 10.1109/TAP.2005.859919
Source: IEEE Xplore

ABSTRACT

In this paper, an overview of antenna design for passive radio frequency identification (RFID) tags is presented. We discuss various requirements of such designs, outline a generic design process including range measurement techniques and concentrate on one practical application: RFID tag for box tracking in warehouses. A loaded meander antenna design for this application is described and its various practical aspects such as sensitivity to fabrication process and box content are analyzed. Modeling and simulation results are also presented which are in good agreement with measurement data.

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    • "RFID tags can be either active, semi-passive (i.e. semi-active) or passive (Nayak et al. 2007; Tesoriero et al. 2008; Rao et al. 2005; Costin et al. 2012). Various applications of RFID according to the frequency band are discussed in Table 1. "
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    • "They are often incorporated into mobile radio communication devices, RFID tags, wireless sensors, and being mounted on the exterior of aircrafts and spacecrafts. In addition, it could be used in retail managements, items tracking, biomedical sensing, and power scavenging circuits [1] [2] [3] [4] [5] [6] [7] [8]. Since there is a new trend of printing electronic circuits on flexible substrate, many printed circuits have been recently fabricated on a typical photo paper and PET substrate which are promising candidates for extremely low cost substrates for fabricating electronic circuits and RF structures [9] [10]. "
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    • "Indeed, in order to evaluate the power backscattered by the tag, it is necessary to take into account various parameters, such as the tag and the receiving antennas' gain, their polarisation mismatch and the separation distance. An alternative method using gigahertz transverse electromagnetic (GTEM) cells has been investigated[1]. Again, in this case, the tag must be properly arranged inside the cell and the antenna gain and some parameters related to the GTEM cell are needed for calculating the power re-radiated by the tag. "
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    ABSTRACT: Presented is a methodology for measuring the power backscattered by ultra-high frequency radio frequency identification (UHF RFID) tags by using a modes stirrer reverberation chamber. The actual measurement methodology is described and its advantage and disadvantage against the conventional setup using anechoic chambers are outlined. Then, some results of power measurements performed with the three Gen2 class 1 tags are presented. The experimented tags' sensitivity and radiation efficiency as a function of incident power are finally derived. The results are very encouraging and demonstrate the feasibility of such a characterisation in modes stirred reverberation chambers. All the measurements were carried out at a single frequency of about 866 MHz.
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