A Band-Rejected Printed Elliptical Antenna for UWB Wireless Communications

A band-rejected printed elliptical antenna with a notch cut and a U-like slot fed by a simple microstrip line is proposed. It is designed for Ultra Wideband (UWB) wireless communications with a stop-band notch in the 5-GHz HIPERLAN and WLAN bands. To obtain sufficient matching bandwidth, a partial ground plane and notch cut are used. To obtain the band-rejected characteristic of 5.2/5.8 GHz, the U-like slot is embedded beneath the notch cut in the elliptical patch. The operation bandwidth of the designed antenna is from 2.97 to 15.09 GHz with band rejection of 4.90 to 5.86 GHz. The proposed simple-shaped antenna provides a good radiation pattern and a relatively flat gain over the entire frequency band excluding the rejected band. The design details and the related results are presented and discussed