Low-profile miniaturized antenna loaded with square ring

The invention relates to a low-profile miniaturized antenna loaded with a square ring. The antenna comprises a planar dipole, a square ring, a dielectric substrate I, a feed structure and a reflecting plate, the planar dipole and the square ring are respectively arranged on the upper surface and the lower surface of the dielectric substrate I, the feed structure is vertically placed on the reflecting plate, the planar dipole is printed on the upper surface of the dielectric substrate I, the square ring is printed on the lower surface of the dielectric substrate I, and the square gap and the rectangular gap are loaded on the planar dipole. By loading the square ring and introducing a new resonance point at a low-frequency position, the coverage frequency band of the antenna is expanded, the additional size of the antenna is not increased, the low-profile design of the antenna is realized, and the impedance mismatch situation caused by reduction of the profile is adjusted by adjusting the feed structure. Differ