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Compact ultra-wideband antenna with dual band-notch design using several parasitic elements
(2010-01-01)
Kueathaweekun, W.
;
Benjangkaprasert, C.
;
Anantrasirichai, N.
;
Wakabayashi, T.
A compact ultra-wideband (UWB) antenna with band-notches designed using a technique that incorporates several parasitic elements is presented. The proposed antenna can be applied to UWB communication systems to avoid interference with other wireless communication systems. By using parasitic elements (C-shaped, inverse C-shaped, L-shaped, J-shaped, and line strip) inserted in the slot antenna, desired bands can be rejected, such as Wireless Local Area Networks (WLAN), (5-6 GHz) and Worldwide Interoperability for Microwave Access (WiMAX), (3.5 GHz). The characteristics of the antenna can be modified to tune the band-notch frequency and the bandwidth of the band-notch. Several parasitic elements can be used to create a dual band-notched design. A UWB slot antenna and four types of single band-notched design are also provided for reference. The paper also presents experimental results regarding the input performance, radiation patterns, and gain of the antenna at different operational frequencies.
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Compact slot antenna with rectangular-ring tuning stub for ultra-wideband application
(2009-01-01)
Kueathaweekun, W.
;
Anantrasirichai, N.
;
Benjangkaprasert, C.
;
Wakabayashi, T.
A compact microstrip-fed slot antenna with rectangular-ring tuning stub for ultra-wideband application is presented. The characteristics of antenna are proposed and analyzed for instance return loss, bandwidth, and far field radiation patterns. The measurement results of the impedance matching for the proposed antenna show the impedance bandwidth of 120% of the center band (3.09-12.15GHz), determined by -10 dB return loss. The measured radiation patterns are bi-directional and average gain is 3.5 dBi.
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Compact CPW-Fed wide slot antenna for ultra-wideband applications
(2009-01-01)
Kueathaweekun, W.
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Purahong, B.
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Benjangkaprasert, C.
;
Anantrasirichai, N.
;
Wakabayashi, T.
A compact ultra-wideband (UWB) CPW-fed slot antenna design is presented. The antenna consists of a wide rectangular slot on the ground plane with rectangular-ring shaped tuning stub. The simulation result of the impedance matching for the proposed antenna show the impedance bandwidth, determined by-10 dB return loss of 116 %, coverage 2.94 GHz to 11.06 GHz for UWB applications. The simulation radiation patterns and gain of the antenna at different operational frequencies are presented and discussed.
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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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Wide-band CPW-fed slot antenna with tuning stub and 1t-strip for WLAN/WiMAX application
(2008-12-01)
Kueathaweekun, W.
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Jearapraditkul, P.
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Anantrasirichai, N.
;
Sangaroon, O.
;
Wakabayashi, T.
This paper presents a coplanar waveguide (CPW) fed rectangular slot antenna with tuning stub and x-strip for WLAN and WiMAX (2-6 GHz) applications. Simulation results show that the impedance matching for the proposed antenna depends on the location of the tuning stub and x-strip, and the impedance bandwidth is mainly determined by the width and length of tuning stub. The bandwidth of slot antenna can achieve 116% (1.8-6.75 GHz). The radiation patterns are bi-directional and maximum gain is 4.8 dBi at 5.8 GHz.
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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.
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Bandwidth enhancement of CPW-fed slot antenna with inset tuning stub
(2008-12-01)
Jearapraditkul, P.
;
Kueathaweekun, W.
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Anantrasirichai, N.
;
Sangaroon, O.
;
Wakabayashi, T.
The coplanar waveguide fed slot antenna with inset tuning stub is proposed for WLAN and WiMAX applications. This antenna consists of a rectangular patch element embedded with a tuning stub fed by CPW feed line. The antenna is designed for match impedance with 50 ohm of characteristic impedance of transmission line by using inset tuning stub for wideband matching. The simulation and measurement results show good agreement operation, which range of bandwidth can be achieved from 1.65 GHz - 6.35 GHz or 117%, suitable for applications to cover 2.4/5.2/5.8 GHz of WLAN bands and 2.5/3.5/5.5 GHz of WiMAX bands. The characteristics of antenna are proposed and analyzed for return loss, bandwidth, current distribution, voltage standing wave ratio and far field radiation patterns. © 2008 IEEE.
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Microstrip-fed slot antenna with rectangular-shaped tuning stub for WLAN application
(2008-10-06)
Kueathaweekun, W.
;
Benjangkaprasert, C.
;
Anantrasirichai, N.
;
Wakabayashi, T.
This paper presents microstrip-fed slot antenna with rectangular-shaped tuning stub for WLAN application. The characteristics of antenna are proposed and analyzed for instance return loss, bandwidth, and far field radiation patterns. The measured results of the impedance matching for the proposed antenna show the impedance bandwidth, determined by -10 dB return loss, larger than 104% (2.0-6.35 GHz) of the center band, radiation pattern is bi-directional and average gain is 4 dBi. ©2008 IEEE.

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