The invention discloses an ultra-
wideband and
wide beam bipolar antenna unit. The unit comprises two groups of bipolarized orthogonal
dipole radiating units, wherein each
dipole radiating unit comprises a pair of Baluns and a pair of U-shaped radiating oscillators respectively arranged on the Baluns; the U-shaped radiating oscillators are arranged centro-symmetrically; and each U-shaped radiating oscillator comprises two horizontally bent branches, two vertically bent branches and an I-shaped
branch, the horizontally bent branches are arranged on the outer sides of the
tail ends of the radiating arms of the U-shaped radiating oscillator, the vertically bent branches are arranged at the
tail ends of the radiating arms of the U-shaped radiating oscillator, are vertical to the
tail end of the U-shaped radiating oscillator, and extend along the axial direction, and the I-shaped
branch is arranged between the two radiating arms of the U-shaped radiating oscillator. In the way that the horizontally bent branches, the vertically bent branches and the I-shaped branches are loaded on the U-shaped radiating oscillators, the U-shaped radiating oscillators can superpose
radiation in multiple resonant
modes, so that bandwidth is greatly increased, and the bandwidth of an antenna can be widened by the unit.