Antenna and electronic device

Patent metadata

Field	Value
Publication number	US-12394909-B2
Application number	US-202218016682-A
Country	US
Kind code	B2
Filing date	Feb 21, 2022
Priority date	Feb 21, 2022
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

An antenna and an electronic device are provided in the present disclosure. The antenna includes a first conductive layer, a dielectric layer, and a second conductive layer which are stacked; the first conductive layer is provided as a microstrip line structure; the second conductive layer is provided with a radiation structure and a director; the radiation structure includes a first edge and a second edge disposed oppositely along a first direction; the radiation structure is provided with a first slot, a second slot, and a third slot that are sequentially communicated along the first direction and away from the first edge, the first slot is circular, the second slot is rectangular, and the third slot gradually increases in dimension in the second direction; the director is disposed on the second conductive layer and located at a side of the third slot away from the second slot.

First claim

The invention claimed is:

1. An antenna comprising a first conductive layer, a dielectric layer, and a second conductive layer which are stacked;
wherein the first conductive layer is provided as a microstrip line structure;
the second conductive layer is provided with a radiation structure and a director; the radiation structure comprises a first edge and a second edge opposite to each other along a first direction in a plane where the second conductive layer is located; the radiation structure is provided with a radiation slot away from the first edge, and the radiation slot comprises a first slot, a second slot and a third slot which are sequentially communicated along the first direction in the plane where the second conductive layer is located, a shape of the first slot is circular, a shape of the second slot is rectangular, the third slot gradually increases in dimension in a second direction from an end connected with the second slot to an end away from the second slot, and the third slot extends in the first direction from the second slot to the second edge of the radiation structure;
the director is disposed on the second conductive layer and located at a side of the third slot away from the second slot, and an orthographic projection of the director on the dielectric layer is at least partially overlapped with an orthographic projection of the third slot on the dielectric layer;
the second conductive layer is further provided with a plurality of metamaterial structures arranged in an array; and
in the plane where the second conductive layer is located, in the first direction, the plurality of metamaterial structures are disposed at a side of the director away from the third slot, and an orthographic projection of the plurality of metamaterial structures on the dielectric layer is not overlapped with an orthographic projection of the radiation structure on the dielectric layer, and the plurality of metamaterial structures are disposed symmetrically with respect to a first centerline.

2. The antenna according to claim 1 , wherein in the plane where the second conductive layer is located, the radiation slot is disposed symmetrically with respect to the first centerline and the director is disposed symmetrically with respect to the first centerline, and the first centerline is a centerline of the antenna along the first direction.

3. The antenna according to claim 1 , wherein the microstrip line structure comprises a first conductive structure, a second conductive structure and a third conductive structure sequentially connected along the second direction in a plane where the first conductive layer is located, a shape of the first conductive structure is rectangular, the third conductive structure is fan-shaped, the second conductive structure gradually decreases in dimension in the first direction from an end connected with the first conductive structure to an end connected with the third conductive structure, the third conductive structure gradually increases in dimension in the first direction from an end connected with the second conductive structure to an end away from the second conductive structure; and
in the plane where the first conductive layer is located, the microstrip line structure is symmetrically disposed along the first direction with respect to a second centerline, the second centerline is a centerline of the microstrip line structure along the second direction, an orthographic projection of the second centerline on the dielectric layer is perpendicular to an orthographic projection of the first centerline on the dielectric layer, and an orthographic projection of the second conductive structure on the dielectric layer is at least partially overlapped with an orthographic projection of the second slot on the dielectric layer.

4. The antenna according to claim 3 , wherein in the plane where the first conductive layer is located, the first conductive structure has a dimension of 0 . 65 mm to 0 . 85 mm along the first direction and a dimension of 5 mm to 7 mm along the second direction;
the second conductive structure has a dimension of 1.6 mm to 2.2 mm along the second direction, and the end of the second conductive structure connected with the first conductive structure has a dimension of 0.45 mm to 0.6 mm along the first direction; the third conductive structure has a sector radius of 0.4 mm to 0.7 mm.

5. The antenna according to claim 1 , wherein in the plane where the second conductive layer is located, the first slot has a radius of 0.8 mm to 1.2 mm, the second slot has a dimension of 2.5 mm to 3.5 mm in the first direction, and the second slot has a dimension of 0.4 mm to 0.8mm in the second direction.

6. The antenna according to claim 1 , wherein dimensions of anyone of the metamaterial structures in the first direction and the second direction are each less than a length of half of a dielectric wavelength;
in the first direction, a distance between two adjacent metamaterial structures is less than the length of half of the dielectric wavelength; and
in the second direction, a distance between two adjacent metamaterial structures is less than the length of half of the dielectric wavelength;
wherein the dielectric wavelength is a wavelength of a wave transmitted or received by the antenna in the dielectric layer.

7. The antenna according to claim 6 , wherein in the plane where the second conductive layer is located, any one of the metamaterial structures has a dimension of 1.1 mm to 1 . 7 mm in the first direction, any one of the metamaterial structures has a dimension of 1 mm to 1.6 mm in the second direction, the distance between two adjacent metamaterial structures in the first direction is 0.3 mm to 0.7 mm, and the distance between two adjacent metamaterial structures in the second direction is 0.3 mm to 0.7 mm;
the antenna has a dimension of 14.8 mm to 15.6 mm in the second direction, the antenna has a dimension of 28 mm to 34 mm in the first direction, and a distance from the first edge of the radiation structure to a junction of the first slot and the second slot in the first direction is 5 mm to 7 mm; and
the third slot has a maximum dimension of 8mm to 10 mm in the second direction.

8. The antenna according to claim 1 , wherein a metamaterial structure comprises a first E-type structure, a second E-type structure and a first connection line connected with the first E-type structure and the second E-type structure, in the plane where the second conductive layer is located, the first E-shaped structure and the second E-shaped structure are symmetrically disposed with respect to a midperpendicular line of the first connection line, the first connection line extends along the second direction and is located at a position of a third centerline, the first E-shaped structure is disposed symmetrically with respect to the third centerline along the first direction, and the second E-shaped structure is disposed symmetrically with respect to the third centerline along the first direction, an opening of the first E-shaped structure faces a side away from the second E-shaped structure, and an opening of the second E-shaped structure faces a side away from the first E-shaped structure.

9. The antenna according to claim 8 , wherein the first connection line has a dimension of 0.2 mm to 0.6 mm along the second direction; for ends located at a same side of the third centerline in the first direction, a distance between an end of the first E-shaped structure away from the second E-shaped structure and an end of the second E-shaped structure away from the first E-shaped structure in the second direction is 1 mm to 1.6 mm; at the position of the third centerline, a distance between an end of the first E-type structure

Assignees

• Beijing Boe Technology Dev Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Fan Xichao
• Wang Yali
• Hu Youjian
• Lu Zhipeng
• Tang Guoqiang

Classifications

• H01Q13/10

  Resonant slot antennas · CPC title

• H01Q1/50

  Structural association of antennas with earthing switches, lead-in devices or lightning protectors · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/36

  Structural form of radiating elements, e.g. cone, spiral, umbrella; {Particular materials used therewith}(H01Q1/08, H01Q1/14 take precedence) · CPC title

• H01Q15/0006

  Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices (H01Q15/12, H01Q15/22, H01Q15/24 take precedence) · CPC title