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Author: search.filters.author.Puntheeranurak, S.

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    Trapezoid-stub fed rectangular slot antenna for WLAN and WiMAX applications
    (2010-12-01)
    Arsusiri, N.
    ;
    Sangaroon, O.
    ;
    Puntheeranurak, S.
    ;
    Anantrasirichai, N.
    This paper proposes the design of slot antenna for wideband use in wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. The antenna structure is comprised of a rectangular slot antenna and excited microstrip transmission line. The antenna is designed on low cost FR4 substrate and the simulation results are analyzed by IE3D Zeland software [1]. The trapezoid tuning stub at the end of the microstrip line is proposed for decreasing return loss between frequency range 2.27 GHz to 6.21 GHz. The simulation result of return loss of the proposed antenna is shown that the operating bandwidth at frequency range of 2.27-6.21 GHz coverage standard of IEEE 802.11 b/g/j/a/h in WLAN (2.4-2.4835 GHz, 4.9-5.1 GHz, 5.15-5.35 GHz, 5.7-5.9 GHz) and WiMAX (2.5-2.7 GHz, 3.4-3.6. 5.7-5.9 GHz). The characteristics of antenna are proposed and analyzed for return loss, input impedance, bandwidth, VSWR, gain, and radiation pattern. ©ICROS.
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    A study on tuning-stub of slot antenna for ultra-wideband applications
    (2010-12-01)
    Arsusiri, N.
    ;
    Sangaroon, O.
    ;
    Puntheeranurak, S.
    ;
    Anantrasirichai, N.
    This paper describes the increasing bandwidth of slot antennas with simply microstrip feed line design. The lower edge frequency of the first band depends on antenna size and the bandwidth becomes widen due to tuning stub. The effect of tuning stub can expand upper frequency of bandwidth to higher frequency. The higher frequency is defined by the stub shape, and its parameters are adjusted to match impedance of transmission line with 50 ohms. By properly setting stub size, a wide impedance bandwidth of the proposed antenna can be achieved for ultra-wideband applications. We propose the tuning stub at the end of the microstrip line for extending bandwidth over 8.0 GHz. In this case, an impedance bandwidth of the slot antenna with tuning stub is 8.05 GHz from frequency range 2.73 GHz to 10.78 GHz. This bandwidth coverage the requirement standard of IEEE 802.15a of frequency range from 3.1 GHz to 10.6 GHz of bandwidth 7.5 GHz by The Federal Communications Commission (FCC)[1]. ©ICROS.
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    Improvement microstrip patch antenna for ultra-wideband by C-shaped wide slot
    (2010-12-01)
    Satthamsakul, S.
    ;
    Puntheeranurak, S.
    ;
    Benjankaprasert, C.
    ;
    Anantrasirichai, N.
    ;
    Wakabayashi, T.
    The simple rectangular patch antenna is designed at frequency 7 GHz and matched impedance with 50 ohms of transmission line. The technique to achieved widest bandwidth from 3 GHz to 12 GHz coverage standard of UWB applications is proposed by etches out slot on the ground plane with inset technique. The configuration and the size of slot on the ground plane are important to enhanced bandwidth, and inset feed is used for good impedance matching in wide frequency range. The radiation patterns of each frequency show the bi-directional with null at angle ±90°. ©ICROS.
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    Gain and radiation improvement technique for rectangular patch antenna
    (2009-01-01)
    Satthamsakul, S.
    ;
    Puntheeranurak, S.
    ;
    Benjankaprasert, C.
    ;
    Anantrasirichai, N.
    ;
    Wakabayashi, T.
    This paper proposed the techniques for improved gain and radiation patterns include bandwidth enhancement of patch antenna by cutting slots in the ground plane. We proposed three styles of slot cut in the ground plane. There are narrow slot, wide slot, and wide slot with conductor strips. Each style is shown the gain improvement with wideband use in X-band communication systems. Finally, the gain is 6.96 dBi at frequency 10.5 GHz and the average gain from 8 to 10.5 GHz is 4.97 dBi. The radiation pattern shown the low back lobe with good directivity.
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    Wide-band slot antenna fed by coplanar waveguide for WLAN applications
    (2009-01-01)
    Kueathaweekun, W.
    ;
    Puntheeranurak, S.
    ;
    Benjangkaprasert, C.
    ;
    Anantrasirichai, N.
    ;
    Wakabayashi, T.
    This paper presents the slot antenna fed by coplanar waveguide (CPW) for WLAN applications. The characteristics of an antenna are proposed and analyzed for instance return loss, bandwidth and far field radiation patterns. Simulation results of the proposed antenna show the impedance bandwidth, determined by-10 dB return loss, approximate 140 % (1.66-9.44GHz) of the center band. The radiation patterns are bi-directional, and maximum gain is 5.7 dBi at 5.0 GHz. The simulation results of the slot antenna are analyzed by using IE3D Software.
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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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    Microstrip-fed slot antenna with cross-shaped tuning stub for UWB application
    (2008-12-01)
    Kueathaweekun, W.
    ;
    Puntheeranurak, S.
    ;
    Anantrasirichai, N.
    ;
    Beniangkaprasert, C.
    ;
    Wakabayashi, T.
    This paper presents microstrip-fed slot antenna with cross-shaped tuning stub for UWB application. The characteristics of antenna are proposed and analyzed for instance return loss, bandwidth, far field radiation patterns, and gain. The simulation results of the impedance matching for the proposed antenna shown the impedance bandwidth determined by -10 dB return loss, approximate 154% (1.75-13.4 GHz) of the center band, the radiation patterns are bi-directional and maximum gain is 7 dBi at 5 GHz. © 2008 IEEE.