Pakasiri, Chatrpol

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Pakasiri, Chatrpol
Alternative Name
Pakasiri, Charpol
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Email
chatrpol.pa@kmitl.ac.th

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    Item type:Publication,
    Impedance Extraction using Impedance Perturbation Method of Electrically Small HF Loop Antenna with Undercover Ferrite Sheet
    (2018-12-24)
    Mangmisirisap, Kanthiphat
    ;
    Bandudej, Kamorn
    ;
    Pakasiri, Chatrpol
    Electrically small high frequency (HF) loop antenna with undercover ferrite sheet yields high radiation resistance for multi-Turn structure. Antenna impedance without radiation differs greatly from that with the radiation effect. Impedance perturbation method is used for extracting antenna impedance with radiation effect at a desired frequency. Matching networks are designed based on the extracted antenna impedance. The measurement results show that the antenna with the designed matching network provides higher return loss.
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    Wireless power transfer system design using electrically small HF loop antennas
    (2019-03-01)
    Mangmisirisap, Kanthiphat
    ;
    Bandudej, Kamorn
    ;
    Pakasiri, Chatrpol
    Wireless power transfer system design with inductive power transfer is proposed in this paper. The system input and output impedances are extracted by using impedance perturbation method. Using matched capacitors, the measured system reflection coefficient magnitude at 13.56 MHz is as low as 0.04 and the transmission coefficient magnitude is at 0.95.