An antenna array and a wireless device using the antenna array are disclosed. The antenna array includes a first antenna set and a first radio frequency lens set. The first antenna set includes a plurality of antennas, and the first radio frequency lens set includes a plurality of radio frequency lenses. The plurality of antennas and the plurality of radio frequency lenses are arranged according to rules. According to the rules, the first radio frequency lens set can be used to increase a phase difference between radio signals from antennas.