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Compact split circular ring shape dual-band antenna with open ring and additional strip
(2016-09-06)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
A dual-band antenna designed at the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) bands is presented compact split circular ring shape dual-band antenna with open ring and addition strip. Its size is compact by the recondition circular ring shaped resonator connected. The antenna is fabricated onto a printed circuit board (PCB) on FR-4 substrate and the relative permittivity of 4.4, an overall size of 23 mm × 30 mm × 0.8 mm. This antenna can easily adjusted with open ring and strip to match impedance using a 50 ohm transmission line with SMA connector. The measured results show that the compacted antenna achieves a dual-band operating bandwidth from 2.38 GHz to 2.56 GHz and 4.66 GHz to 7.29 GHz for 11 S below -10 dB and the antenna yields omnidirectional patterns. The measured gains of the antenna from 2.45 and 5.5 GHz frequencies are 1.55 dBi and 3.2 dBi, respectively.
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Design of triple-band antenna using S-shaped patch fed by cross strip line for WLAN and WiMAX applications
(2015-09-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
This paper presents a simple triple-band S-shaped patch antenna fed by a cross strip line for both WLAN and WiMAX applications. It is operated at the triple bands of 2.4 and 5.2 GHz for WLAN and 3.5 GHz for WiMAX. The antenna, designed on an FR4 substrate with a thickness of 1.6 mm and relative permittivity of 4.4, is fed by a 50-Ω microstrip line, and is of size 25 × 35 mm. The simulated and measured results of |S<inf>11</inf>|, gains, and radiation patterns are presented. The measured results show that the triple-band antenna achieves a broad operating bandwidth of 2.36-2.54, 3.27-3.69, and 5.16-5.48 GHz for a 10-dB return loss (i.e. |S<inf>11</inf>|<-10 dB). The gains of the antenna measured at 2.4, 3.5, and 5.2 GHz frequencies are 1.87, 1.95, and 3.82, respectively. The radiation pattern of the antenna is omnidirectional.
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Compact dual-band I-shaped patch antenna with longitudinal strip on inverted-T ground plane
(2014-01-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
This paper presents a compact dual-band I-shaped patch antenna with longitudinal strip on inverted-T ground plane for wireless local area network (WLAN) applications over the frequency band of 2.400-2.484 GHz and 5.150-5.350 GHz. The I-shaped patch antenna and inverted-T ground plane are etched onto a piece of printed circuit board (PCB) with an overall size of 40 mm × 60 mm × 1.6 mm. It is excited by strip line to match impedance with a 50 ω transmission line. The measured results show that the miniaturized antenna achieves a broad operating bandwidth of 2.26-2.89 GHz and 4.92-5.83 GHz for S<inf>11</inf><-10 dB and omnidirectional radiation pattern. The measured gains of the antenna at 2.4 GHz and 5.2 GHz frequencies are 1.90 dBi and 3.45 dBi, respectively. © 2014 IEEE.
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Miniaturized dual-band II-shaped monopole antennas with modified rectangular ground plane
(2014-01-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
Dual-band antenna covering IEEE 802.11a/b/g bands is presented using a miniaturized II-shaped monopole antennas with modified rectangular strip ground plane for dualband WLAN operation over the frequency band of 2.400-2.484 GHz, 5.150-5.350 GHz and 5.725-5.825GHz. The II-shaped monopole antenna and with modified rectangular ground plane are etched onto a piece of printed circuit board (PCB) with an overall size of 25 mm × 44 mm × 1.6 mm. This antenna can easily be fed by strip line to match impedance using a 50 ohm transmission line with SMA connector. The measured results show that the miniaturized antenna achieves a broad operating bandwidth of 2.26-2.89 GHz and 4.92-5.83 GHz for -S<inf>11</inf>-< -10 dB and omnidirectional radiation pattern. The measured gains of the antenna from 2.400 to 2.484 GHz and 5.150 to 5.825 GHz frequencies are 1.3 dBi and 2.5 dBi, respectively. © 2014 IEEE.
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An ultra-wideband circular microstrip antenna fed by microstrip line above wide-slot ground plane
(2007-12-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
A simple and compact ultrawideband(UWB) circular Circular Microstrip Antennafed by Microstrip Line above Wide-Slot Ground Plane is presented. The proposed antenna is easy to be integrated with microwave circuitry for low manufacturing cost. The antenna is successfully designed simulated and measured return loss, radiation patterns and gain, the antenna can operate in the 2.5-12.8 GHz frequency range and cover the UWB operating bandwidth of 3.1-10.6GHz. The antenna gain varies from about 0.14 and 4.83 dBi and bi-directional antenna. ©2007 IEEE.
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A circular micro strip antenna with tuning stub above wide-slot ground plane for band-notched uwb using inverted-U slot
(2007-12-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
A simple and compact circular microstrip antenna with tuning stub above wide-slot ground plane for band-notched ultra wide-band (UWB) using inverted-U slot is presented. The proposed antenna is easy to be integrated with microwave circuitry for low manufacturing cost. The antenna is successfully designed, simulated and measured including SWR, radiation patterns and gain. The antenna can operate in the 2.8-12.8 GHz frequency range and cover the UWB operating bandwidth of 3.1-10.6 GHz with a notched frequency band of 5.06-5.96 GHz. The antenna gain varies from -4.1 dBi to 7.1 dBi and yields bidirectional pattern.
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Analysis of probe excited circular ring above reflector in outdoor WLAN systems
(2005-12-01)
Phongcharoenpanich, Chuwong
;
Chawanonphithak, Yuktitath
;
Wounchoum, Phairote
;
Krairiksh, Monai
This paper presents the analysis of probe excited circular ring above reflector in WLAN bridge systems. The evaluation performance mainly in terms of link distance, compared probe excited circular ring above reflector and monopole antenna. The path loss used to determine service range is modelled by two-ray model. The calculation and experimental results are very useful for design and evaluation performance of WLAN bridge systems. ©2005 IEEE.

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