Antenna oscillator and base station antenna

The utility model relates to the technical field of communication, and provides an antenna oscillator and a base station antenna, the antenna oscillator comprises a reflecting plate, a feed unit and a radiation unit, the feed unit is arranged on the reflecting plate, the radiation unit is arranged at one side of the feed unit far away from the reflecting plate, the radiation unit comprises at least two radiation sheets which are stacked in sequence, and the radiation sheets are arranged on the reflecting plate. And the at least two radiation sheets are sequentially laminated from the direction close to the reflecting plate to the direction far away from the reflecting plate. According to the antenna oscillator provided by the utility model, at least one edge of each radiation sheet is recessed inwards to form the groove structure, current is obviously distributed at the inner edge of the groove structure, and a current path from a feed angle of the radiation sheet to an opposite angle is lengthened, so that t