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In this paper, a novel band-notched circular slot (BNCS) antenna for ultra-wideband (UWB) communication is proposed. This antenna is comprised of a circular stub that excite similar-shaped slot aperture. The proposed antenna is designed on the RO4350B substrate with thickness of 500m and relative permittivity (r) of 3.4 to operate in UWB band released by the US's Federal Communications Commission (FCC) in 2002 (i.e., 3.1{10.6GHz). To reject the frequency band of 5.15{5.825GHz, which is limited by IEEE 802.11a and HIPERLAN/2, an inverted-cup strip is parasitically attached to the feed layer. The size of our proposed antenna is 50 £ 50mm 2 , and this antenna has good radiation characteristics. Efiects of varying the parameters of parasitic inverted-cup strip on performance of the proposed antenna have been studied. The antenna with optimal parameters obtained from parametric study is fabricated and measured. It is observed that the simulated and experimental results have good agreement with each other.
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Kalteh et al. (2010) studied this question.
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