Antenna array and base station antenna

The invention provides an antenna array and a base station antenna. The antenna array comprises high-frequency radiation arrays and a low-frequency radiation array. The at least two columns of high-frequency radiation arrays are arranged side by side, the low-frequency radiation unit comprises a nested bowl-shaped radiation unit and a cross-shaped radiation unit, the nested bowl-shaped radiation unit is used for being nested with the high-frequency radiation units of the high-frequency radiation arrays, and the cross-shaped radiation unit is located in a gap between the four high-frequency radiation units of every two adjacent columns of high-frequency radiation units. By changing the array distribution layout, the sector power ratio of the antenna can be effectively improved, the proportion of the radiation power of the antenna in the sector is optimized, the mutual interference between the antennas is reduced, the radiation efficiency of the antenna is improved, the unit horizontal plane directional diagram