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Author: search.filters.author.Akkaraekthalin, PrayootSubject: search.filters.subject.RFID sensor

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    Curved meander line resonators for chipless RFID sensors
    (2019-09-01)
    Suwalak, Rattapong
    ;
    Phongcharoenpanich, Chuwong
    ;
    Akkaraekthalin, Prayoot
    ;
    Torrungrueng, Danai
    This paper presents a chipless RFID sensor based on the curved meander line resonator. The sensor is designed and printed on Fr4-substrate with thickness of 0.8 mm. The resonator on the RFID sensor acts as a data bit for identification, where we use only one bit in this paper for illustration. Transmitting and receiving antennas on the RFID sensor are properly designed to sense the dielectric property of the material under test. From the results, it can operate from 1.8-2.5 GHz. The gain is 2.14 dBi at the resonant frequency of 2.28 GHz. Therefore, it can be candidate as a RFID sensor with a nondestructive testing technique.
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    Dielectric material determination using the radar equation in RFID sensor applications
    (2016-03-07)
    Suwalak, Rattapong
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    ;
    Akkaraekthalin, Prayoot
    A radar-cross section (RCS) of passive printed tags in a radio frequency identification (RFID) is presented to determine a dielectric constant of a material under test (MUT). In this paper, a printed loop tag with a meander-line is employed as an RFID sensor. The optimum parameters of the proposed RFID sensor are obtained using the CST Microwave Studio program. This paper employs two RFID sensors with different RCS to improve the accuracy of dielectric material determination. The relation between the read range (Rmax) and the real part of dielectric constant (?r) can be used to determine the dielectric constant of MUT.
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    A radar-cross section of a passive tag on dielectric material in an RFID sensor application
    (2015-08-17)
    Suwalak, Rattapong
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    ;
    Akkaraekthalin, Prayoot
    This paper is mainly present to a radar-cross section (RCS) of a passive tag in a radio frequency identification (RFID) sensor application. To determine qualities of a dielectric material under test (MUT) with a non-destructive testing (NDT) technique, a proposed meander-line dipole tag antenna is employed as a RFID sensor. The design and optimum parameters of the proposed RFID sensor are obtained using the CST Microwave Studio program. In this paper, instead of focusing on the scalar backscattered power based on the Friis transmission equation, we are also studying the RCS range equation to utilize for improve the accuracy of determination a qualities of MUT in a RFID sensor system. Simulated results show that the characteristics of the proposed RFID sensor such as the input impedance, antenna gain, power transmission coefficient and RCS.