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Author: search.filters.author.Lertsakwimarn, KittimaSubject: search.filters.subject.RFID sensor

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    Dual-Band Band-Stop Filter using Multiple Hexagonal Microstrip Line for Chipless RFID Sensor
    (2023-01-01)
    Suwalak, Rattapong
    ;
    Lertsakwimarn, Kittima
    ;
    Lertwiriyaprapa, Titipong
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    The dual-band band-stop filter using a hexagonal-shape microstrip line is presented in this paper. The chipless RFID with the band-stop filter used to determine the relative permittivity of material under test and identify characteristic based on the unique responded signal from the chipless RFID sensor. This paper proposed the multiple microstrip line structure with a quarter-wavelength transformer to generate an identification (ID) code, i.e., ID-01, ID-10, and ID-11 at the center frequency of 2.2 GHz and 2.7 GHz. From the results, the proposed chipless RFID sensor can be identified and determined the relative permittivity of the LWC.
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    Effects of tag location on light weight concrete for an RFID sensor application
    (2012-10-02)
    Suwalak, Rattapong
    ;
    Lertsakwimarn, Kittima
    ;
    Phongcharoenpanich, Chuwong
    ;
    Krairiksh, Monai
    ;
    Torrungrueng, Danai
    The radio frequency identification (RFID) tags are proposed to be employed as remotely read dielectric-property sensors to determine qualities of some construction material products (CMPs); e.g., light weight concrete (LWC), mortar specimens and concrete. This paper presents a study of the characteristics of an RFID tag mounted at several locations on the LWC. The numerical simulations are performed using the CST Microwave Studio to study effects of tag, where the folded dipole with an inductive loop tag antenna is used. Results show that locations of an RFID tag on LWC affects the tag antenna characteristics such as input impedance, gain and radiation pattern. © 2012 IEEE.