Sakonkanapong, Arnon

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Sakonkanapong, Arnon
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Email
arnon.sa@kmitl.ac.th

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    Item type:Publication,
    Measurement of Radiated Field from Transmitting Antennas Located in Various Environments
    (2019-04-01)
    Krairiksh, Monai
    ;
    Kittiyanpunya, Chainarong
    ;
    Limpiti, Thunyawat
    ;
    Tantisopharak, Tanawut
    ;
    Leekul, Prapan
    In microcellular communications, the transmitting antennas can be installed at low heights above the ground. However, even for low elevation towers, installation cost is still high. One of the possible ways for the deployment of base station antennas is to install them near the ground in order to do away with the tower. The main purpose of this paper is to suggest installation of the radiating antennas near the ground and tilting their orientation toward the sky - a totally nonintuitive solution. It will be shown that such deployments have the potential of reducing slow fading and can further enhance the signal strength close to the radiating antenna. This paper provides measured data for the received fields to validate the theoretical conjecture of such a deployment in various environments. The measured results are presented for 245, 800, 1000, and 2400 MHz. It is illustrated that such an unorthodox deployment can result in a low cost for the installation of base station antenna as the towers are not necessary. This can be useful in restoring communications in emergency situations where minimum infrastructure exists.
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    NFC-Enabled Far-Field Antenna on PET Flexible Substrate for 3G/4G/LTE Mobile Devices
    (2019-01-01)
    Luadang, Bancha
    ;
    Sakonkanapong, Arnon
    ;
    Dentri, Sitthichai
    ;
    Pansomboon, Rassamitut
    ;
    Phongcharoenpanich, Chuwong
    This research presents a far-field (FF) antenna with near-field communication (NFC) capability for 3G/4G/LTE mobile devices. The integrated far- and near-field communication (FNFC) antenna was fabricated using conductive silver ink on polyethylene terephthalate (PET) flexible substrate. The FF segment of the antenna is operable in the frequency range of 1.8-2.1 GHz, and the NFC antenna is of dual loop and operable at 13.56 MHz. In the antenna realization, simulations were performed and, to validate, an antenna prototype was fabricated. The experimental results revealed that the FF antenna achieved an impedance bandwidth of 37% (1.52-2.21 GHz), given $\vert S_{11}\vert $ of less than -6 dB, with the minimum and maximum efficiency of 92.1% and 98%. The experimental gains are 1.76-2.08 dBi across the target operating frequency band, with near-omnidirectional radiation pattern. The simulation and experimental results are in good agreement. Moreover, the FNFC antenna achieves strong magnetic field distributions in $H_{\mathrm {x}}$ , $H_{\mathrm {y}}$ , and $H_{\mathrm {z}}$ orientations and holds promising potential for 3G/4G/LTE applications.
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    Wideband UHF Reflector Antenna for DVB Applications
    (2019-12-01)
    Osklang, Pracha
    ;
    Sakonkanapong, Arnon
    ;
    Dentri, Sitthichai
    ;
    Lertsakwimarn, Kittima
    ;
    Luadang, Bancha
    This paper presents the design, measurement, and development of a bow tie wideband antenna using scutcheon shape with inductive-loaded for DVB applications. The antenna consists of 3 elements; a scutcheon bow tie radiator, a line inductive-loaded and a square reflector. The element of bow tie achieves a lower frequency of 470 MHz. The element of line inductive-loaded achieves an upper frequency of 860 MHz for |S11| of less than-10 dB. The measured results of the prototype antenna are good agreement. The impedance bandwidth of 81.27%, which covering a frequency range from 374 MHz to 886 MHz. The measured gains are flat around 7 dBi over the DVB band. The HPBW in the vertical and horizontal planes are 56.8° and 117.3° at frequency of 660 MHz.