Four types of novel and compact ultra-wideband (UWB) microstrip-fed monopole antennas having frequency band-stop function are presented. To generate the band-stop perfor- mance, modifled planar monopoles with inverted U-slot, U-slot, small strip bar and ‚=4 C-shaped slot are used. The designed antennas satisfy the i10dB return loss requirement in the frequency band between 3 and 11GHz, while showing the band-stop characteristic in the frequency band of 5.0 to 5.9GHz. DOI: 10.2529/PIERS061007113522
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Choi et al. (2007) studied this question.
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