Abstract: In this paper a dual-band antenna is designed. Our main objective is to design dual-band antenna so that a single antenna can be used for WLAN and UWB applications simultaneously. The antenna design is consist of a U-shaped patch and a rectangular monopole. The proposed antenna is fed by 50? microstrip line and designed on a FR4 substrate of size 42mm×24mm×1.6mm. This antenna is radiating at 2.45 GHz (WLAN) and 4.3GHz and 7GHz (UWB application). Design results of Return loss S11, VSWR, gain and directivity is shown in this paper. Design results are obtained by a CST Microwave studio.

Keywords: Tri-band, U-shaped, WLAN, UWB, printed antenna.