Radiation device, antenna and communication equipment

The invention relates to a radiation device, an antenna and communication equipment. The radiation device comprises a radiation oscillator surface, a single balun, a coupling plate, a bottom plate and a coaxial cable arranged below the bottom plate, and the coupling plate is arranged between the bottom plate and the coaxial cable; the radiation oscillator surface comprises two pairs of polarized oscillator surfaces; two pairs of transmission lines are arranged on the single balun, and one ends of the two pairs of transmission lines are respectively connected with the two pairs of polarized oscillator surfaces so as to feed the two pairs of polarized oscillator surfaces; a first gap is formed in the middle of the bottom plate, and the other ends of the two pairs of transmission lines penetrate through the first gap and are respectively connected with the coaxial cable; the coaxial cable is connected with the coupling plate, and the coupling plate is coupled and electrically connected with the bottom plate. By