Antenna device and manufacturing method therefor, control method and electronic device

A manufacturing method of an antenna device, comprising:

• providing a first substrate structure, wherein the first substrate structure comprises a first substrate, a plurality of antenna patches located on a first side of the first substrate, and a plurality of first signal lines located between the first substrate and the plurality of antenna patches;
• providing a second substrate structure, wherein the second substrate structure comprises a second substrate and a metal layer having a plurality of slots, the metal layer is located on a second side of the second substrate, and one slot of the plurality of slots corresponds to one antenna patch of the plurality of antenna patches;
• engaging the first substrate structure with the second substrate structure to obtain a space between the first substrate structure and the second substrate structure, wherein after the engaging:
• the second substrate structure is located on one side of the plurality of antenna patches away from the first substrate, and the metal layer is located on the second side of the second substrate close to the first substrate, and
• a region where an orthographic projection of each slot of the plurality of antenna patches on the first substrate overlaps with an orthographic projection of a corresponding antenna patch on the first substrate is a first region, the orthographic projection of the each slot on the first substrate further comprises a second region and a third region, and the first region is located between the second region and the third region;
• and
• injecting liquid crystal into the space to obtain a liquid crystal layer,
• wherein a waveguide structure is located on one side of the second substrate structure away from the first substrate structure and comprises one or more cavities, wherein a bottom of each cavity is provided with at least one row of first metal posts, and each row of first metal posts comprise a plurality of first metal posts arranged in a propagation direction of electromagnetic wave,
• wherein the plurality of first metal posts comprises a first group of first metal posts and a second group of first metal posts spaced apart from each other in the propagation direction of electromagnetic wave, heights of the first group of first metal posts are in a first monotonic change in the propagation direction of electromagnetic wave, and heights of the second group of first metal posts are the same,
• wherein each first signal line is connected to at least one of the plurality of antenna patches, each first signal line is in contact with the connected at least one of the plurality of antenna patches, and an orthographic projection of each first signal line on the first substrate does not overlap with the orthographic projection of the each slot on the first substrate,
• wherein a ratio of an area of each of the second region and the third region to an area of the first region ranges from 1.5 to 2,
• wherein a ratio of an area of each of the fourth region and the fifth region to an area of the first region ranges from 1 to 1.5, and
• wherein a side of each cavity connected to the bottom comprises a plurality of second metal posts, a ratio of a length, a width, and a height of each second metal post being 1:(0.8˜1.2):(2.4˜3.6).