Miniaturized low-profile base station antenna unit

The utility model discloses a miniaturized low-profile base station antenna unit, which comprises an antenna radiator, a first feed balun, a second feed balun, a fixed plate and a reflecting plate, the top ends of the first feed balun and the second feed balun are connected with the antenna radiator, and the bottom ends of the first feed balun and the second feed balun are connected with the fixing plate. The fixed plate is connected with the reflecting plate; the antenna is characterized in that the antenna radiator comprises an antenna radiator dielectric plate and two pairs of half-wave oscillators printed on the surface of the antenna radiator dielectric plate, each pair of half-wave oscillators is composed of two square structures, a cross-shaped gap is formed among the four square structures, and arc-shaped chamfers are arranged at the inner end and the outer end of each square structure; the first feed balun and the second feed balun are respectively provided with a first feed line and a second feed li