Low-scattering antenna and multi-frequency antenna array thereof

The invention provides a low-scattering antenna and a multi-frequency antenna array thereof. The low-scattering antenna comprises an antenna main radiator, a dielectric top plate, a first feed Balun, a second feed Balun and an antenna floor. The first feed Balun and the second feed Balun are connected in a mutually perpendicular and crossed manner, the upper end of the first feed Balun and the upper end of the second feed Balun are connected with the dielectric top plate, and the lower end of the first feed Balun and the lower end of the second feed Balun are connected with the antenna floor. The antenna main radiator is printed on the top surface of the dielectric top plate and comprises a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm, and each radiation arm has the same structure and size and is composed of at least two branch knots which are sequentially connected along a straight line, wherein the at least two branch knots have two different widths, and the