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Federal Communication Commission released the commercial operation UWB within the frequency range 3.1 - 10.6GHz in 2002. To reduce the interferences from WLAN bands, WiMAX, and some C band satellite service bands, many band-notched filters are desirable in the UWB system. Recently several dual and multiband rejection UWB antennas have been reported. A simple and a compact Co-Planar Waveguide (CPW) UltraWide Band (UWB) antenna are presented. Multiband stop function is achieved by two different types of band stop resonators. One is a tilted square spiral slot resonator of different size and length etched on the patch and the other is a coupled resonator etched on the ground plane. These resonators provide considerable increase in notch bandwidth at the stop bands.
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