Antenna, antenna array and related device

The embodiment of the invention discloses an antenna. The antenna can be used in network equipment. The antenna comprises a first antenna unit; the first antenna unit comprises a first waveguide antenna unit, a first dipole antenna unit, a first feed probe and a first floor, and the first floor comprises a first opening; the first waveguide antenna unit comprises a first open hole and a first metal groove, and the first open hole is formed in an opening of the first metal groove; the first dipole antenna unit is connected with the first opening; the first feed probe is coupled with the first waveguide antenna unit. The first feed probe is used for feeding the first waveguide antenna and the first dipole antenna. By arranging the first waveguide antenna unit with the first metal groove in the first antenna unit, the heat dissipation area of the first antenna unit is increased, the air circulation and heat exchange speed in the antenna is enhanced, and the heat dissipation performance of the antenna and the com