Seven-frequency-band multiple-input-multiple-output mobile phone antenna based on magnetic dielectric material

The utility model discloses a seven-frequency-band multiple-input-multiple-output mobile phone antenna based on a magnetic dielectric material. The MIMO antenna is small in occupied space and applicable to current ultra-thin smartphones and covers multiple frequency bands of 2G/3G/4G. The antenna comprises two identical antenna units containing substrates. Mental structures of the antenna units are tightly attached to the substrates of the magnetic dielectric material. A feed piece carries out direct feed, and a parasitic piece which surrounds the feed piece and is coupled with the feed piece is grounded. The two antenna units are symmetrically distributed and connected with a grounding plate, and the two antenna units and the grounding plate form two partial antenna bodies. The coupling degree between the two partial antenna bodies is reduced through grounding connecting wires and the substrates made of the magnetic dielectric material, so that the coupling degree of the two partial antenna bodies is quite low and can meet a practical standard. The antenna can cover multiple frequency bands, the frequency bands are quite wide, the two antenna units are each located on one side of the corresponding substrate and are quite near to each other, the grounding connecting wires only utilize the clearance between the two antenna units, so that the occupied pace of the antenna is quite small, and the antenna can be applied to a mobile phone quite conveniently.