Decoupling structure between adjacent rectangular patches in dual-band antenna array

The invention discloses a decoupling structure between adjacent rectangular patches in a double-frequency antenna array. The decoupling structure comprises a dielectric substrate, metal grounding plates arranged on the lower surface and the upper surface of the substrate respectively and two symmetrical double-frequency metal patches. Two feed probes are arranged on the metal grounding plate and penetrate through the dielectric substrate to be in contact with the two patches respectively; a decoupling branch unit and a short-circuit probe unit are arranged between the two patches, decoupling of space waves between the two patches is achieved, and a short-circuit probe is arranged on the metal grounding plate and penetrates through the dielectric substrate to make contact with the decoupling branch unit; U-shaped grooves are symmetrically etched in the two patches and used for activating the other mode; and a defected ground structure is etched on the metal grounding plate and is used for preventing current fr