Multi-frequency high-isolation MIMO antenna

The invention provides a multi-frequency high-isolation MIMO antenna, which belongs to the technical field of antennas. The invention aims to improve the problems of traditional MIMO antennas such as poor isolation, single hand and large size. The antenna of the invention comprises a rectangular dielectric substrate and two element antennas arranged on the dielectric substrate. The two element antennas are in mirror symmetry and arranged orthogonally. The two element antennas are highly isolated, and each element antenna can work independently and has good radiation characteristic. Radiating bodies are E-shaped metal patches, the longitudinal side of each radiating body is provided with a rectangular slot, and the rectangular slots enable the antenna to generate multi-frequency resonance and work at three bands of a WLAN. The multi-frequency high-isolation MIMO antenna of the invention has the advantages of low coupling, compact structure, low cost, and the like. The multi-frequency high-isolation MIMO antenna is miniaturized and has good radiation characteristic while the impedance bandwidth of the antenna is ensured. By adopting a mode of micro-strip feeding, the antenna can be easily integrated in a microwave planar circuit and perfectly covers all bands of the WLAN. The multi-frequency high-isolation MIMO antenna is applicable to small mobile equipment.