A multiple band-notched planar monopole antenna for multi-band wireless systems is presented. The proposed antenna consists of a wideband planar monopole antenna and the multiple U-shape slots, producing bandnotched characteristics. In order to generate two bandnotched characteristics, we propose that three U-shape slots are required. This technique is suitable for creating ultrawideband (UWB) antenna with narrow frequency notches or for creating multi-band antennas.
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