Multi-antenna hybrid decoupling device suitable for compact environment and wireless communication system

The invention discloses a multi-antenna hybrid decoupling device suitable for a compact environment and a wireless communication system. The device comprises a first antenna unit, a second antenna unit, a third antenna unit, a first decoupling structure, a second decoupling structure, a dielectric substrate and a metal floor, the first antenna unit, the second antenna unit and the third antenna unit are all located on the side, away from the metal floor, of the dielectric substrate and are distributed in an L shape. The first decoupling structure and the second decoupling structure are respectively connected with the metal floor, and the first decoupling structure is arranged on the dielectric substrate and located between the first antenna unit and the second antenna unit so as to suppress energy coupling between the first antenna unit and the second antenna unit; the second decoupling structure is arranged on the side, away from the dielectric substrate, of the metal floor and located between the second ant