Antenna structure and high-frequency wireless communications terminal

An antenna structure includes: a metal plate disposed with a first accommodating groove; an antenna unit including a radiation piece and a coupling piece; and a radio frequency module disposed on a first side of the metal plate and electrically connected to the radiation piece. At least one of the radiation piece and the coupling piece is disposed in the first accommodating groove. The radiation piece is insulated from the metal plate, the coupling piece is insulated from the metal plate, the radiation piece is disposed opposite to the coupling piece and insulated from the coupling piece. The radiation piece is located between the coupling piece and the radio frequency module. The radiation piece is configured to generate a resonance in a first preset band, and the coupling piece is configured to expand the bandwidth of the resonance in the first preset band.