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Access type: UnknownSubject: search.filters.subject.UHF-RFID

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    Design of circularly polarized unidirectional antenna using probe-excited circular ring antenna above the square reflector with inserted metallic slabs
    (2017-01-17)
    Phongcharoenpanich, Chuwong
    ;
    Lertsakwimarn, Kittima
    ;
    Sukkamat, Rungsinee
    ;
    Mhudtongon, Nattaset
    ;
    Kosulvit, Sompol
    This paper proposes a circularly polarized unidirectional antenna using a probe excited circular ring with inserted perpendicular slabs above the square reflector for UHF-RFID system. The measured S<inf>11</inf> ≤ -10 dB covers 884-1000 MHz or 12.31% bandwidth, and 3-dB AR bandwidth of 900-1000 MHz or 10.53% bandwidth. The maximum gain is 8.35 dBic. The half-power beamwidths in xz-and yz-planes are 66.3 and 66.7 degrees, respectively.
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    Dual-band RFID tag antenna with EBG for glass objects
    (2016-01-06)
    Phatarachaisakul, Teerapol
    ;
    Pumpoung, Tajchai
    ;
    Phongcharoenpanich, Chuwong
    The dual-band tag antenna designed for glass objects of HF-RFID (13.56 MHz) and UHF-RFID (920-925 MHz) applications along national standard of Thailand is proposed. The tag antenna has the same size with a credit card. The overall dimension of the tag antenna with EBG is 147 mm × 73.5 mm × 8.3 mm. The purpose of this antenna design is to implement with the RFID for the highway tracking and tolls systems. The tag antenna and EBG are designed on FR-4 substrate with thickness of 0.3 mm and 3 mm, respectively. To achieve the dual band operation, the designed tag antenna with EBG structure is based on the loop (spiral coil), the meander-line structure with double T-matching and mushroom-like EBG structure for HF-, UHF-RFID and EBG, respectively.
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    Printed antenna for HF- and UHF-RFID tag
    (2015-01-28)
    Phatarachaisakul, Teerapol
    ;
    Pumpoung, Tajchai
    ;
    Wongsiritorn, Pitchanun
    ;
    Pansonboon, Russamitut
    ;
    Phongcharoenpanich, Chuwong
    The dual-band tag antenna designed for HF-RFID (13.56MHz) and UHF-RFID (920-925 MHz) applications along Thailand standard is proposed. The overall dimension of the tag antenna has the size of a credit card in order to implement the RFID for the highway tracking and tolls systems. The tag antenna is designed on FR-4 substrate with 0.3 mm thickness. To achieve the dual band operation, the designed tag antenna structure is based on the loop (spiral coil) and the meander-line structure with T-matching technique for HF-RFID and UHF-RFID technologies, respectively.