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Author: search.filters.author.Osklang, PrachaSubject: search.filters.subject.DTV

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    Broadband planar dipole array Antenna with double C-shaped slit elements for digital TV broadcasting transmission
    (2016-06-01)
    Osklang, Pracha
    ;
    Phongcharoenpanich, Chuwong
    This research has proposed a planar rectangular dipole antenna enclosed in double C-shaped parasitically slit elements (i.e., radiator element) on a double-cornered reflector for bandwidth enhancement. In the study, simulations were first carried out to determine the optimal parameters of the radiator element and then a radiator element prototype was fabricated and mounted onto a double-cornered aluminum reflector. The simulated and measured |S<inf>11</inf>|<–10 dB of the antenna element covered the frequency ranges of 451–901 MHz (66.6%) and 455–886 MHz (64.3%), respectively. The gain was enhanced by the subsequent deployment of multiple radiator elements to fabricate a four-element vertically array antenna on an elongated double-cornered reflector. The simulated and measured |S<inf>11</inf>|<−10 dB of the array antenna, respectively, covered the 410–991 MHz (82.9%) and 415–886 MHz (72.4%) frequency ranges. The proposed array antenna radiates unidirectionally across the DTV frequency band with a measured front-to-back ratio and cross polarization >20 and <−23 dB, respectively. The simulated and measured half-power beam widths in the E and H planes were respectively 56° ± 13° and 20° ± 6°; and 57° ± 13° and 21° ± 6°. In addition, the simulated and measured gains of the array antenna were 12.8–16.4 dBi and 11.3–15.8 dBi along the 470–862 MHz frequency range. This proposed array antenna is thus suitable for DTV broadcasting transmission. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:466–478, 2016.
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    Horizontally polarized omnidirectional antenna using octagonal dipole array for digital television reception
    (2015-04-22)
    Osklang, Pracha
    ;
    Luadang, Bancha
    ;
    Phongcharoenpanich, Chuwong
    ;
    Lamultree, Suthasinee
    This paper presents a horizontally polarized omnidirectional antenna using octagonal dipole array for digital television reception. The proposed antenna consists of stacked octagonal dipole array that is designed from brass sheet. The parametric study is carried out for different dimensions of distance between octagonal dipole, dipole arm and radiator to improve the impedance bandwidth. Obvious that the results show good impedance matching of S<inf>11</inf>better than 10 dB, and antenna gain of 1.1 dBi-2.3 dBi along the frequency range from 470 MHz to 862 MHz.