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Author: search.filters.author.Wounchoum, PhairoteSubject: search.filters.subject.Trapezoidal dual loop antenna

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    Improvement of communication performance for trapezoidal dual loop antennas by switching techniques
    (2007-12-01)
    Kawdungta, Supakit
    ;
    Wounchoum, Phairote
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    This paper presents the switching techniques for trapezoidal dual loop antennas to improve the communication performance of Radio Frequency Identification (RFID) system at low frequency. The switching techniques use two sets of antennas in walk-through gate configuration in order that the RFID reader can activate two sets of antenna at different times. Both antennas were designed to yield the magnetic field covering the entire volume. The antenna prototype was fabricated and measured the percentage of volume to confirm the communication performance. The obtained percentages of volume in three principal axes are 100%. The experimental results verify the antenna capability in RFID system.
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    Trapezoidal dual loop antenna for Radio Frequency Identification (RFID) system at low frequency
    (2006-01-01)
    Mansap, Chawanthawat
    ;
    Wounchoum, Phairote
    ;
    Phongcharoenpanich, Chuwong
    ;
    Torrungrueng, Danai
    This paper proposes the trapezoidal dual loop antenna for radio frequency identification (RFID) system at low frequency band (125 kHz and 134.2 kHz). Typically, the conventional antenna for this system is the rectangular loop. The antenna structure is simple at the expense of limited tag orientation and shorter distance communications. The advantage of the proposed antenna is that it can be used for arbitrary orientation with the further distance. It also possesses the simple structure with low cost. The simulation is carried out by using the Numerical Electromagnetic Code (NEC) to determine the suitable parameters. The antenna prototype is fabricated and measured to validate the antenna design and performance in RFID system. Copyright 2006 IEICE.