This paper proposes a monopole ceramics dielectric resonator antenna which is characterized by small size, broad band, simple structure. A ring ceramics dielectric resonator is put around the monopole, and the frequency band is broadened by coupling the ring dielectric resonator with the monopole resonant frequency. The antenna model is established by using the HFSS simulation software, then the model is optimized and simulated and the optimal parameters of the antenna are obtained. The bandwidth of the antenna is from 0.7~4.6 GHz，relative bandwidth reaches to 153%. The antenna is measured by a vector network analyzer and the results and simulation values are basically coincide with each other.