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Tag Antenna (tag + antenna)

Distribution by Scientific Domains
Engineering100%

Kinds of Tag Antenna

  • rfid tag antenna
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    Selected Abstracts

    A novel miniature monopole tag antenna for passive UHF RFID applications

    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 12 2010
    Hsien-Wen Liu
    Abstract A novel miniature monopole tag antenna for passive Ultra-High Frequency (UHF) radio frequency identification (RFID) operation is presented. The antenna possesses a two-sided structure that is printed on an FR4 substrate and fed by a 50-, microstrip line. By properly using helical strips and vias, the antenna size can be reduced to a small volume of 10 (L) × 9.5 (W) × 0.8 (H) mm3 to be easily integrated within various portable devices. A miniaturized quasi-lumped circuit is also designed to attain a good impedance matching between the antenna and the chip. Experimental results demonstrate that the antenna has a suitable operating band about 914,939 MHz and also quite omnidirectional radiation pattern with appreciable gain. Moreover, the proposed compact tag antenna, capable of achieving a maximum readable range of about 5.6 m with an EIRP equal to 4 W, is well suited for RFID applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2770,2772, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25596 [source]

    Slot tag antenna for high Q RFID chip

    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2010
    T. Deleruyelle
    Abstract This article presents a radio frequency identification (RFID) tag slot antenna. This antenna is suitable for high Q RFID chip. The input impedance at 915 MHz should be 19 + j492 ,. Simulated maximum range is more than 8 m on Federal Communication Commission (FCC) RFID band and more than 3 m on the entire RFID band. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2493,2495, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25531 [source]

    Low-profile radio frequency identification tag antenna using a trapezoid patch mountable on metallic surfaces

    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 8 2010
    Horng-Dean Chen
    Abstract A trapezoid patch antenna, designed for ultra high frequency band radio frequency identification tag mountable on metallic surfaces, is presented in this article. The proposed antenna has a simple and low-profile (0.8 mm thick) structure. The impedance matching can be easily achieved by adjusting the upper-side width and the height of the trapezoid patch. The reading range of the proposed antenna is verified by calculation and measurement, which shows good agreement. Varying antenna size can provide applicable reading range to suit different applications. The results obtained show that the proposed antenna can work efficiently in free space and on metallic objects. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1697,1700, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25310 [source]

    RFID tag antenna using two-shorted microstrip patches mountable on metallic objects

    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2007
    Byunggil Yu
    Abstract A novel UHF band RFID tag antenna, which can be effectively mounted on metallic objects, is presented. Using the inductively coupled feeding technique, the proposed antenna consists of two symmetric shorted radiating elements and feeding loop. The feeding loop is excited so that the currents on the radiating elements are out of phase with the equal amplitude. The proposed tag antenna gives smaller variation of the antenna performance than that of conventional tag antennas when the tag is mounted on the various sizes of the metallic objects. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 414,416, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22159 [source]

    Analysis and characterization of transponder antennae for radio frequency identification (RFID) systems

    PACKAGING TECHNOLOGY AND SCIENCE, Issue 1 2006
    T. C. Chau
    Abstract An investigation into the use of various radio frequency identification (RFID) antenna designs was performed. Passive RFID tag antennae with a resonant frequency range of 902,928,MHz were tested for robustness and efficiency in the Packaging Science RFID Laboratory at the University of Florida. Commercially available single- and dual-dipole tags were examined for read performance. Electromagnetic modelling software was used to model the impedance matching and detuning effects of nearby conducting surfaces. s-Parameters, current densities and polar plots of various dipole designs were estimated. Strategies used to shorten antenna length, such as capacitive loading, were evaluated. A simple half-wave dipole antenna was modelled in order to determine the effect of length on resonant frequency and performance. Parameter sweeps showed that a length of 14.4,cm was required for resonance at 915,MHz and 50,, termination. Capacitive loads shortened the dipole to 8.4,cm while adding 4.2,cm to height. It was verified that a conducting surface, such as metal packaging, had strong detuning effects on RFID tag antennae. Different methods, such as tuning stubs, alleviated the detuning effects by allowing bandwidths twice as large as with a simple dipole. Finally, the rationale for commercially available RFID antenna designs was discussed. It was found that analysis of actual antenna tag structures in the laboratory and exploring different methods to improve efficiency can lead to improvements in RFID performance. Copyright © 2005 John Wiley & Sons, Ltd. [source]

    Dual-frequency antenna for RFID tags with complementary characteristic

    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 6 2007
    Jieh-Sen Kuo
    Abstract A novel dual-frequency Radio Frequency Identification (RFID) antenna with complementary operation mechanisms (two different operation mechanisms: near field and far field operation) is proposed. The proposed antenna is obtained by printing a rectangular-spiral-shaped and a meander-shaped line, which is placed above on a rectangular microwave substrate as a RFID tag's antenna where its ground plane is at the bottom of substrate. The proposed antenna is fed by a 50 , microstrip line printed on the same substrate, and the antenna's two resonant frequencies can be excited with good impedance matching. Closer to omni-directional radiation patterns and the lower cross-polarization levels (at least 25-dB) are also obtained. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1396,1398, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI.10.1002/mop.22426 [source]