Abstract: A controllable band-notched antenna for UWB communication is presented in this paper. The antenna is composed of a circular ring patch and partial ground. An arc-shaped slot is etched in the patch to generate notched band while maintaining small size and simple structure of the antenna. The software Ansoft HFSS is used to simulate and design the antenna. Simulated results show that an operating bandwidth (VSWR臆2) from 2. 8 to 10. 8 GHz with a band rejection from 5. 1 to 6GHz is obtained. The proposed antenna is fabricated and measured. Radiation patterns and peak gains show good properties in operating frequency band. Moreover, the antenna is compact in size and simple in structure which indicate that the proposed antenna is well suitable for UWB applications.