5-GHz band-notched UWB elliptical slot antenna fed by microstrip line

In this paper a novel band-notched elliptical slot antenna for ultra-wideband (UWB) communication is proposed which is comprised of elliptical stub that excite similar-shaped slot aperture. The proposed antenna is designed on a substrate RT/duroid 6006 with thickness of 1.27 mm and relative permittivity (εr) of 6.0 to operate in UWB band released by FCC in 2002 (i.e., 3.1-10.6 GHz). To reject the frequency band of 5.15-5.825 GHz, which is limited by IEEE 802.11a and HIPERLAN/2, an inverted-U-shaped strip is parasitically attached to the feed layer. The size of our proposed antenna is 45×50 mm2, which results in desirable radiation characteristics. Effects of varying the parameters of parasitic inverted-U strip on performance of proposed antenna have been studied. The antenna with optimal parameters obtained from parametric study is fabricated and measured. It is observed that the simulation and experimental results have good agreements with each other.