Low frequency radiation unit

The invention provides a low-frequency radiation unit, the low-frequency radiation unit comprises two pairs of radiation arms arranged in a polarization orthogonal manner, each radiation arm comprises a radiation outer ring and a wave-transparent inner ring from outside to inside, the wave-transparent inner ring is provided with a plurality of wave-transparent elements on an annular path, and two adjacent wave-transparent elements are electrically connected through a connection structure. And a feed part is arranged on the radiation outer ring. A high-frequency signal and an intermediate-frequency signal can penetrate through the low-frequency radiation unit, so that the low-frequency radiation unit can be conveniently arranged with the high-frequency radiation unit and the intermediate-frequency radiation unit in a co-array mode at the same time, the low-frequency radiation unit, the intermediate-frequency radiation unit and the high-frequency radiation unit can be conveniently integrated on the same antenna