Antenna unit and manufacturing method thereof, display device, and electronic apparatus

An antenna unit, comprising:

• a radiation main body,
• at least one feed line, electrically connected with the radiation main body, and
• a plurality of grounding portions, wherein the radiation main body, the at least one feed line, and the plurality of grounding portions are provided in a same layer,
• wherein the at least one feed line comprises a first feed line and a second feed line, and the antenna unit comprises a dual-polarized antenna,
• the first feed line is located at a first side of the radiation main body and electrically connected with the radiation main body, and the second feed line is located at a second side of the radiation main body and electrically connected with the radiation main body,
• the plurality of grounding portions comprise a first grounding portion, a second grounding portion, a third grounding portion, and a fourth grounding portion, wherein the first grounding portion and the second grounding portion are respectively located at both sides of the first feed line, and the third grounding portion and the fourth grounding portion are respectively located at both sides of the second feed line;
• a side of the second grounding portion facing the radiation main body is provided with a first protrusion, two sides of the first protrusion opposite to the radiation main body are parallel to each other, and
• a side of the third grounding portion facing the radiation main body is provided with a second protrusion, two sides of the second protrusion opposite to the radiation main body are parallel to each other.

A manufacturing method of an antenna unit, comprising:

• providing a flexible substrate;
• forming a metal layer on the flexible substrate, and etching the metal layer to form an antenna comprising a radiation main body, at least one feed line and a plurality of grounding portions, and
• forming an adhesive protection layer on a side of the antenna away from a display panel,
• wherein the at least one feed line comprises a first feed line and a second feed line, and the antenna unit comprises a dual-polarized antenna,
• the first feed line is located at a first side of the radiation main body and electrically connected with the radiation main body, and the second feed line is located at a second side of the radiation main body and electrically connected with the radiation main body,
• the plurality of grounding portions comprise a first grounding portion, a second grounding portion, a third grounding portion, and a fourth grounding portion, wherein the first grounding portion and the second grounding portion are respectively located at both sides of the first feed line, and the third grounding portion and the fourth grounding portion are respectively located at both sides of the second feed line;
• the first feed line comprises a first section and a second section, the first section is close to the radiation main body, the second section is electrically connected with the first section, the first section is electrically connected with the radiation main body, and the second section extends from the first section between the first grounding portion and the second grounding portion;
• the second feed line comprises a third section and a fourth section, the third section is close to the radiation main body, and the fourth section is electrically connected with the third section, the third section is electrically connected with the radiation main body, and the fourth section extends from the third section between the third grounding portion and the fourth grounding portion;
• the first grounding portion, the second grounding portion, the third grounding portion, and the fourth grounding portion are arranged along a reference direction,
• the symmetry axis of the radiation main body is at a first preset angel with respect to the reference direction, the first preset angle is in a range of (45 degrees±δ), wherein δ is a preset deviation value,
• at least one selected from the group consisting of the first section and the third section is perpendicular to the symmetry axis of the radiation main body, and
• at least one selected from the group consisting of the second section and the fourth section is perpendicular to the reference direction.