Antenna device with slot structure

The invention provides an antenna device with a slot structure, comprising a substrate, an antenna and the slot structure, wherein the substrate comprises a surface; the antenna is arranged on the surface of the substrate and comprises a feed-in section, a radiating part and a grounding part; the feed-in section is provided with a feed-in end for feeding in signals and a connecting end which is opposite to the feed-in end; the radiating part is connected with the connecting end; the grounding part is provided with a first support arm which extends from the feed-in end and is spaced with the radiating part; and the slot structure comprises a first slot which passes through the substrate and is arranged between the radiating part and the extending part of the first support arm in the length direction, thus improving the radiating efficiency of the antenna device.