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Author

T. Archevapanich

Bio: T. Archevapanich is an academic researcher from Rajamangala University of Technology. The author has contributed to research in topics: Slot antenna & Stub (electronics). The author has an hindex of 4, co-authored 11 publications receiving 40 citations.

Papers
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Proceedings ArticleDOI
26 Dec 2007
TL;DR: This paper presents an inversed e-shape slot antenna for wireless LAN applications, designed for dual frequency band 2.38-2.5 GHz and 4.8-6.16 GHz of resonance frequency, which can support WLAN applications coverage IEEE 802.11b/g, IEEE802.11j, and Wimax.
Abstract: This paper present an inversed e-shape slot antenna for wireless LAN applications. The antenna is designed for dual frequency band 2.38-2.5 GHz and 4.8-6.16 GHz of resonance frequency 2.44 GHz and 5.68 GHz, respectively, which can support WLAN applications coverage IEEE 802.11b/g (2.4 -2.4835 GHz), IEEE 802.11j (4.90-5.091 GHz), IEEE 802.11a (5.15-5.35 GHz), and Wimax of IEEE 802.16d (5.7-5.9 GHz). The bandwidth at low resonance frequency and high resonance frequency are 0.12 GHz and 1.36 GHz, respectively. The simulation results of inversed e-shape slot antenna are analyzed by using method of moment (MoM) from IE3D software.

15 citations

Proceedings ArticleDOI
21 Oct 2008
TL;DR: In this paper, two difference configurations of double rectangular slot loop antenna are proposed for comparison on bandwidth and size of antenna for dual frequency support WLAN system coverage IEEE 802.11b/g (2.4-2.4835 GHz), I.11j (4.90-5.091), and I.16d (5.7-5 GHz).
Abstract: 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 (epsivr) 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.

6 citations

Proceedings ArticleDOI
02 Dec 2008
TL;DR: In this paper, a rectangular slot antenna with U-strip line was proposed for dual frequency IEEE 802.11b/g (2.4-2.4835 GHz) and 802.16d (5.7-5.9 GHz) applications.
Abstract: 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 802.11 b/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 (epsivr) 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.

6 citations

Proceedings ArticleDOI
02 Dec 2008
TL;DR: The coplanar waveguide fed slot antenna with inset U-strip tuning stub is proposed for wideband applications and analyzed for instance input impedance, return loss, bandwidth, VSWR, and far field radiation patterns.
Abstract: 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.

4 citations


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Journal ArticleDOI
TL;DR: In this article, a series of curved microstrip antennae with defected ground structure for multiband is proposed, which are more smaller, conveniently conformal, wider radiation beam and suitable for WLAN terminal for difierent environment.
Abstract: A series of curved microstrip antennae with defected ground structure for multiband are proposed, which are more smaller, conveniently conformal, wider radiation beam and suitable for WLAN terminal for difierent environment. The relation between the main geometry parameters and the antennas' characters are studied with the cavity model method and EM simulation, and the optimum size antenna is achieved later. If keeping the other parameters but increasing the curving angle fi, the return loss is almost good at f = 2:45GHz, but poor at f = 5:25GHz and 5.8GHz. After slight tuning the key parameters, these curved antennae all can work at f = 2:45GHz, 5.25GHz and 5.8GHz, and their patterns in the plane that is vertical to the curve axes become more wider or even omni- directional with the curving angle fi increasing, which are verifled by experiment, their measured gain are 2dB{6.3dB.

70 citations

Proceedings ArticleDOI
01 Dec 2010
TL;DR: In this article, a microstrip slot antenna with novel E-shaped coupling aperture is presented, which can be designed for high gain, dual band or quad band characteristic, and compacting the antenna is also possible.
Abstract: A microstrip slot antenna with novel E-shaped coupling aperture is presented. Different parameters of the antenna are explored. It's shown that by varying the dimensions of E-shaped slot and length of Ls (matching stub), the antenna can be designed for high gain, dual band or quad band characteristic. As it's shown compacting the antenna is also possible. A simple patch antenna, a dual band antenna and a practical quad band antenna is designed. The last one is developed to meet IEEE 802.11a/b/g and IEEE 802.16d standards in order to cover all of the wireless LAN and WiMAX frequency bands. Last two antennas are 47% smaller than a regular patch antenna resonating at 2.47GHz while providing relative high gain and very good efficiency. HFSS and CST softwares are exploited to verify the antennas performance.

21 citations

Journal ArticleDOI
Hyo Rim Bae, Soon One So, Choon Sik Cho, Jae W. Lee, Jaeheung Kim1 
TL;DR: In this paper, the authors proposed a dual-band antenna using a crooked U-slot with radial stub feeding, which makes impedance matching possible over a wide band at low frequency, while the radial stub is used for feeding and also for providing additional resonance at the high frequency.
Abstract: We propose a dual-band antenna using a crooked U-slot with radial stub feeding. This antenna has a simpler topology than other antennas designed for realizing dual-band characteristics. In addition, the proposed antenna adjusts to desired frequencies easily. The crooked U-slot made on the bottom layer provides the advantage of making impedance matching possible over a wide band at the low frequency, while the radial stub is used for feeding and also for providing additional resonance at the high frequency. The operating frequencies of the proposed antenna are chosen as 2.4 and 5.2 GHz, obtained by optimizing the physical dimensions of the crooked U-slot and radial stub. Measured results of return loss show -26.2 and -12.2 dB at 2.4 and 5.2 GHz, respectively. Measured gain is 0.47 and -1.97 dBi at 2.4 and 5.2 GHz, respectively.

20 citations

Journal ArticleDOI
TL;DR: In this paper, a printed ultrawideband (UWB) CPW-fed Koch fractal slot antenna is proposed, whose extrusive angle is 900 instead of 600 to obtain better convoluted shape and self-similarity.
Abstract: A novel printed ultrawideband (UWB) CPW-fed Koch fractal slot antenna is proposed. The UWB bandwidth is largely enhanced by the three-iteration Koch fractal slot whose extrusive angle is 900 instead of 600 to obtain better convoluted shape and self-similarity. The −10 dB impedance bandwidth is 3400 MHz (1270–4670 MHz) or about 114% in comparison with 1290 MHz (1620–2910 MHz) or about 57% of the referenced square slot antenna. Details of the proposed antenna design and performance are presented and discussed.

20 citations

Book ChapterDOI
28 Mar 2012
TL;DR: A compact low profile microstrip patch antenna suitable for Global System for Mobile Communications (GSM) and Worldwide Interoperability for Microwave Access (WiMAX) applications is presented and exhibits omni-directional radiation patterns with reasonable gain on all operating frequency bands.
Abstract: This paper presents a compact low profile microstrip patch antenna suitable for Global System for Mobile Communications (GSM) and Worldwide Interoperability for Microwave Access (WiMAX) applications. FR4 epoxy is used as substrate with relative permittivity 4.4 and tangent loss 0.02. The prototype contains slots, shorted pin, partial ground, tuning stub and dual feeding techniques. Parametric analysis has been carried out to observe the effects of techniques. Simulation results show that antenna has enough impedance bandwidth to cover the desired frequency bands. The prototype is fed using transmission line. Antenna exhibits omni-directional radiation patterns with reasonable gain on all operating frequency bands. Characteristic analysis and simulation of prototype was done using Ansoft HFSS (High Frequency Structure Simulator).

18 citations