Abstract
This paper proposes a compact ultrawideband monopole antenna fed by CPW with a 5.5GHz notched band of WLAN/WiMAX systems. The antenna input section is designed by using a gradual curvature central line and ground planes for ultrawideband achievement. In order to reject the unwanted frequency of the existing WLAN/WiMAX band, the C-shaped slit with perimeter length of a half wavelength at center frequency of 5.5GHz has been embedded into the monopole patch. The designed antenna is completely implemented and measured for impedance bandwidth covering UWB range and stably performs omnidirectional pattern in xz plane from 3.1 to 10GHz. The proposed antenna could potentially minimize frequency interference in the WLAN/WiMAX bands.
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