A microstrip-fed great arc shaped dipole antenna is proposed and designed for ultrawideband communications. The antenna has large bandwidth covering the frequency band from 3.8 to 9.4 GHz. With simple and proper modification of the radiation patches, a frequency notched performance is obtained at the frequencies 5.8 and 7.5GHz. This paper aims at the performance at 5GHz ISM band. The proposed antenna also provides a gain of 5.68 dB, which is better as compared to the conventional dipole antenna. Measured results show that, the proposed antenna is suitable for UWB applications due to the high performance. © 2013 IEEE.