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Author: search.filters.author.Archevapanich, T.

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    Double rectangular slot loop antenna for dual frequency
    (2008-12-01)
    Jearapraditkul, P.
    ;
    Archevapanich, T.
    ;
    Purahong, B.
    ;
    Anantrasirichai, N.
    ;
    Sangaroon, O.
    This paper presents the technique for reducing size of double rectangular slot loop antenna fed by microstrip line for dual frequency. The two difference configurations of double rectangular slot loop antenna are proposed for comparison on bandwidth and size of antenna. These antennas are designed for dual frequency support WLAN system coverage IEEE 802.11b/g (2.4-2.4835 GHz), IEEE 802.11j (4.90-5.091), IEEE 802.11a (5.15-5.35 GHz), and IEEE 802.16d (5.7-5.9 GHz). The PCB-FR4 substrate with dielectric constant (ε<inf>r</inf>) 4.5 of thickness 1.6 mm is chose for low cost. The simulation results of these slot antennas are analyzed by using Method of Moment (MoM) from IE3D Software. In this case, the result of bandwidth for low frequency and high frequency of one antenna are 11.29% and 62%, and other are 6.1% and 75.5%, respectively. The size with ground plane of double slot loop antenna can be reduced 12.9% or can be reduced size of double slot loop antenna about 21.5% when set the new inner conductor. © 2008 SICE.
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    CPW-fed slot antenna with inset L-strip tuning stub for ultra-wideband
    (2008-12-01)
    Archevapanich, T.
    ;
    Jearapraditkul, P.
    ;
    Puntheeranurak, S.
    ;
    Anantrasirichai, N.
    ;
    Sangaroon, O.
    The coplanar waveguide fed slot antenna with inset L-stripe tuning stub is proposed for UWB applications. The antenna consists of two rectangular slots separated by center strip with CPW feed line. This antenna is design for match impedance with 50 ohm of characteristic impedance of transmission line by using inset L-stripe tuning stub for wideband matching. By adjusting dimension of inset L-strip tuning stub, the range of bandwidth can be achieved 144.6% (1.80 GHz -11.2 GHz) of the center band coverage standard of IEEE 802.15a for ultra wideband operation. The characteristics of antenna are proposed and analyzed for instance input impedance, return loss, bandwidth, VSWR, and far field radiation patterns. © 2008 SICE.
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    CPW-fed slot antenna with inset U-strip tuning stub for wideband
    (2008-12-01)
    Purahong, B.
    ;
    Jearapradikul, P.
    ;
    Archevapanich, T.
    ;
    Anantrasirichai, N.
    ;
    Sangaroon, O.
    The coplanar waveguide fed slot antenna with inset U-strip tuning stub is proposed for wideband applications. The antenna consists of rectangular slots with conductor tuning stub fed by CPW feed line. This antenna is design for match impedance with 50 ohm of characteristic impedance of transmission line. By adjusting dimension of inset U-strip tuning stub, the range of bandwidth can be achieved from 1.66 GHz to 7.22 GHz which can operate in WLAN (Wireless Local Area Network) according to IEEE 802.11 a/b/g standards and covered the WiMAX (Worldwide Interoperability for Microwave Access, IEEE 802.16e) and can operate for mobile GSM1800, GSM 1900. The characteristics of antenna are proposed and analyzed for instance input impedance, return loss, bandwidth, VSWR, and far field radiation patterns.
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    Inset dual U-strip slot antenna fed by microstrip line for WLAN applications
    (2008-12-01)
    Archevapanich, T.
    ;
    Nakasuwan, J.
    ;
    Purahong, B.
    ;
    Anantrasirichai, N.
    ;
    Sangaroon, O.
    This paper presents the slot antenna fed by microstrip line with inset U-strip for dual frequency operates in WLAN applications. The rectangular slot antenna is proposed for comparison between with and without U-strip in slot antenna by using three configurations of slot antenna. This antenna is designed for dual frequency used in WLAN system coverage IEEE 802.11b/g (2.4-2.4835 GHz), IEEE 802.11J (4.90-5.091), IEEE 802.11a (5.15-5.35 GHz) and WiMAX of IEEE802.16d (5.7-5.9 GHz). The PCB-FR4 substrate with dielectric constant (ε<inf>r</inf>) 4.5 of thickness 1.6 mm is chose for low cost. The simulation results of these slot antennas are analyzed by using Method of Moment (MoM) from IE3D Software. Finally, the result of bandwidth at low frequency and high frequency of the desirable antenna are 9.76% and 31.6% at frequency range 2.3-2.58 GHz and 4.76-6.34 GHz, respectively.