Antenna device

An antenna device, comprising:

• a first substrate, having a first top surface and a first bottom surface located opposite to each other;
• a second substrate, stacked on the first substrate and having a second top surface and a second bottom surface located opposite to each other, wherein the second bottom surface is connected to the first top surface;
• a plurality of low frequency exciting assemblies, disposed on the first top surface, wherein each of the plurality of least one low frequency exciting assemblies comprises two first low frequency exciters, two second low frequency exciters and a third low frequency exciter, the two first low frequency exciters and the two second low frequency exciters are arranged along two parallel lines, respectively, and at least a part of the third low frequency exciter is disposed between the two first low frequency exciters and the two second low frequency exciters;
• a plurality of high frequency exciters, disposed on the second top surface, wherein a projection of the plurality of high frequency exciters orthogonally projected onto the first substrate does not overlap with the plurality of low frequency exciting assemblies;
• and
• a third substrate, wherein the third substrate is stacked on the first substrate, the third substrate has a third top surface and a third bottom surface located opposite to each other, and the third top surface is connected to the first bottom surface;
• a coupling body, disposed on the third top surface, wherein the coupling body has four sides and a plurality of slots, and the plurality of slots are spaced apart from the four sides;
• and
• a plurality of transmission lines, disposed on the third bottom surface, wherein each of the plurality of transmission lines has a feeding point;
• wherein the plurality of low frequency exciting assemblies, the plurality of high frequency exciters, the plurality of slots and the plurality of transmission lines are arranged in an array.