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Design of a Half-Circle Shape UWB Antenna  

Lee Hyo-Kyoung (Graduated School of Information & Communications, Hanbat National University)
Lee Jung-Nam (Graduated School of Information & Communications, Hanbat National University)
Jang Hwa-Yeol (Graduated School of Information & Communications, Hanbat National University)
Park Jong-Kweon (Department of Radio Wave Engineering, Hanbat National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.9, 2005 , pp. 932-940 More about this Journal
Abstract
In this paper, a planar half-circle shape ultra-wideband(UWB) antenna fed by CPW is designed, fabricated and measured for UWB communications. Within the UWB band(3.1 GHz${\~}$10.6 GHz), 5.15 GHz${\~}$5.825 GHz frequency band is used by IEEE 802.1la WLAN applications. It may be necessary to notch out this band to avoid interference with IEEE 802.1la WLAN. Therefore, we have proposed three kinds of UWB antennas having a notch function, such as a rectangular slot, a hat-shaped slot a circle-shaped slot. The notch frequency of the proposed antenna can be adjusted by controlling the slot length or slot width. From the measured results, the proposed antennas show a good gain flatness except the IEEE 802.1la WLAN frequency band and have a reasonable agreement with simulated results.
Keywords
Ultra-Wideband(UWB) Antenna; IEEE 802.1la WLAN; CPW; Notch Function; Half-Circle;
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