A new dielectric resonator antenna (DRA) is introduced for ultra‐wideband applications.In this structure, the DRA consists of three factors: a compact circular‐shaped dielectric resonator, a crescent patch, and a CPW feed ground. With the electromagnetic coupling between the feeding patch and the dielectric resonator, a broadband impedance bandwidth is achieved. Measured results demonstrate that the proposed DRA has a wide bandwidth from 1.6 to 15 GHz, and the measured return losses are less than −10 dB in this band. The experimental and numerical results are carried out showing a good agreement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2709–2712, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25567