Common-aperture antenna array

The utility model provides a common-caliber antenna array. The common-caliber antenna array comprises a plurality of common-caliber antenna sub-arrays and a PCB layer. Each common-aperture antenna sub-array is composed of a receiving antenna and a plurality of transmitting antennas located around the receiving antenna; the PCB layer is composed of a conductive layer and a plurality of dielectric layers. In the common-caliber antenna sub-array, a plurality of transmitting antennas are arranged in a sequential rotation mode; the receiving antenna at least comprises a receiving radiation patch, orthogonal feed via holes and feed discs, and each feed disc and one orthogonal feed via hole are arranged in a concentric circle; coupled feeding is performed between the receiving radiation patch and the feed disc; the transmitting antenna at least comprises a transmitting radiation patch and a feeding point. The feed disc of the receiving antenna and the radiation patch adopt coupling feed, the strong inductance effect