Based on the demand for antenna with wide-bandwidth and wide coverage angle, a miniaturized antipodal Vivaldi antenna is designed for 9 GHz to 11 GHz. A rectangle director is added to the back end of the antenna for better broadband matching effect. The HFSS software is used for structural optimization to obtain the specific parameters of the antenna. The antipodal Vivaldi antenna with the director is processed and tested. Through simulation and actual measurement, the return loss is less than -15 dB in the 9-12 GHz band, and the bandwidth below -10 dB is 6.9-14 GHz. At the same time, 3 dB beam width enables ±30° coverage range. The size of the antenna is only 15 mm×16 mm×0.762 mm. The proposed antenna is a miniaturized one with a wide bandwidth and wide coverage angle.