Circular polarization array antenna capable of realizing wide-angle scanning at Ka (K-above) frequency range

The utility model discloses a circular polarization array antenna capable of realizing wide-angle scanning at the Ka frequency range, which comprises a cavity surface (1), a radiating unit (2) and fixed nuts (3). The radiating unit is composed of cross oscillators (4), an insertion socket (6) and a coaxial cable (8), wherein the insertion socket (6) is provided with a square platform (11), threads (12) are arranged at the lower end of the square platform (11), an SMP (symmetrical multiprocessing) interface (13) is arranged on the inner side of the threads (12), and the radiating unit (2) is inserted onto the cavity surface (1) and fixed with the fixed nuts (3) by the threads (12). An outer conductor (9) of the coaxial cable (8) has two symmetric gap baluns (5), and an inner conductor (7) of the coaxial cable (8) is fixedly connected with one oscillator of the cross oscillators (4). By the aid of the square platform, the threads and a radiating unit socket of the SMP interface, assembling difficulty of an array surface is reduced, capability of inserting and replacement is realized, and risk in researching the integral array surface of the antenna is reduced.