Antenna unit and electronic device

Patent metadata

Field	Value
Publication number	US-12300911-B2
Application number	US-202218016357-A
Country	US
Kind code	B2
Filing date	Feb 28, 2022
Priority date	Feb 28, 2022
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

Disclosed are an antenna unit and an electronic device, wherein the antenna unit includes a dielectric substrate, an antenna layer and a ground layer located on both sides of the dielectric substrate; wherein the antenna layer includes a microstrip feed line, a radiation patch and a microstrip coupling line structure located on a side of the microstrip feed line in a first direction, the microstrip coupling line structure comprises a first branch structure, a microstrip coupling line and a second branch structure that are sequentially connected along the first direction, the first branch structure is arranged at intervals with the microstrip feed line, and the ground layer includes a floor groove, wherein there is a first overlapping area between an orthographic projection of the floor groove on the dielectric substrate and an orthographic projection of the microstrip feed line on the dielectric substrate.

First claim

The invention claimed is:

1. An antenna unit, comprising:
a dielectric substrate, an antenna layer and a ground layer located on both sides of the dielectric substrate respectively, wherein:
the antenna layer comprises a microstrip feed line, a radiation patch and a microstrip coupling line structure located on a side of the microstrip feed line in a first direction, the microstrip coupling line structure comprises a first branch structure, a microstrip coupling line and a second branch structure that are sequentially connected along the first direction, the first branch structure is arranged at intervals with the microstrip feed line, and the ground layer includes a floor groove, wherein there is a first overlapping area between an orthographic projection of the floor groove on the dielectric substrate and an orthographic projection of the microstrip feed line on the dielectric substrate, and there is a second overlapping area between the orthographic projection of the floor groove and an orthographic projection of the first branch structure on the dielectric substrate;
the microstrip feed line is in a “-” shape;
the floor groove is in a “-” shape;
the microstrip feed line is a uniform impedance microstrip feed line; and
the radiation patch is in a shape of a rectangle or a diamond.

2. The antenna unit according to claim 1 , wherein the dielectric substrate comprises a first reference line extending in the first direction and a second reference line extending in a second direction, wherein at least one of the floor groove, the radiation patch, the first branch structure, the microstrip coupling line and the second branch structure is arranged symmetrically with respect to the first reference line, and the microstrip feed line is arranged symmetrically with respect to the second reference line, the first reference line being perpendicular to the second reference line.

3. The antenna unit according to claim 1 , wherein the floor groove comprises a first groove, a second groove and a third groove arranged sequentially along the first direction, wherein an orthographic projection of a first end of the second groove on the dielectric substrate is located in the first overlapping area, an orthographic projection of a second end of the second groove on the dielectric substrate is located in the second overlapping area, a width of the second groove is smaller than a width of the first groove, the width of the first groove is equal to a width of the third groove, and the width of the groove refers to a dimensional characteristic along the second direction, the second direction is perpendicular to the first direction.

4. The antenna unit according to claim 3 , wherein at least one of the width of the first groove, the width of the second groove and the width of the third groove is 0.25 mm to 1.8 mm.

5. The antenna unit according to claim 3 , wherein a length of the second groove is 2.0 mm to 2.65 mm, and the length of the groove refers to a dimensional feature along the first direction.

6. The antenna unit of claim 1 , wherein the microstrip feed line is the uniform impedance microstrip feed line extending along a second direction, and the second direction is perpendicular to the first direction.

7. The antenna unit according to claim 6 , wherein the step impedance microstrip feed line includes a first feed line, a second feed line and a third feed line which are connected sequentially along the second direction, wherein a width of the second feed line is smaller than a width of the first feed line, the width of the first feed line is equal to a width of the third feed line, and the width of the feed line refers to a dimensional characteristic along the first direction.

8. The antenna unit according to claim 1 , wherein the microstrip coupling line includes a first microstrip coupling line and a second microstrip coupling line located on both sides of the radiation patch in a second direction respectively.

9. The antenna unit according to claim 8 , wherein the first branch structure comprises a first branch and a second branch which are located on a side of the radiation patch in an opposite direction of the first direction, wherein a first end of the first branch is connected with a first end of the second branch, a second end of the first branch is connected with a first end of the first microstrip coupling line, and a second end of the second branch is connected with a first end of the second microstrip coupling line.

10. The antenna unit according to claim 9 , wherein the first branch includes a first sub-branch and a second sub-branch, and the second branch includes a third sub-branch and a fourth sub-branch, wherein a first end of the first sub-branch is connected with a first end of the third sub-branch, a second end of the first sub-branch is connected with a first end of the second sub-branch, a second end of the second sub-branch is connected to the first end of the first microstrip coupling line, a second end of the third sub-branch is connected to a first end of the fourth sub-branch, and a second end of the fourth sub-branch is connected to the first end of the second microstrip coupling line, the first sub-branch, the second sub-branch, the third sub-branch and the fourth sub-branch being “L” shaped branches.

11. The antenna unit according to claim 8 , wherein the second branch structure comprises a third branch and a fourth branch which are located on a side of the radiation patch in the first direction, wherein a first end of the third branch is connected to a second end of the first microstrip coupling line, and a first end of the fourth branch is connected to a second end of the second microstrip coupling line; and a second end of the third branch is connected with a second end of the fourth branch.

12. The antenna unit of claim 11 , wherein the third branch and fourth branch are “-” shaped branches.

13. The antenna unit of claim 1 , wherein the microstrip feed line, the radiation patch, the microstrip coupling line, the first branch structure and the second branch structure are arranged in a same layer and made of a same material.

14. The antenna unit of claim 1 , wherein the microstrip coupling line, the first branch structure and the second branch structure are connected with each other to form an integral structure.

15. An electronic device, comprising the antenna unit of claim 1 .

16. The antenna unit of claim 11 , wherein the third branch and fourth branch are “L” shaped branches.

17. The antenna unit according to claim 8 , wherein the second branch structure comprises a third branch and a fourth branch which are located on a side of the radiation patch in the first direction, wherein a first end of the third branch is connected to a second end of the first microstrip coupling line, and a first end of the fourth branch is connected to a second end of the second microstrip coupling line; both the second end of the third branch and the second end of the fourth branch are connected with the ground layer through a via hole.

18. The antenna unit according to claim 8 , wherein the second branch structure comprises a third branch and a fourth branch which are located on a side of the radiation patch in the first direction, wherein a first end of the third branch is connected to a second end of the first microstrip coupling line, and a first end of the fourth branch is connected to a second end of the second microstrip coupling line; and the second end of the third branch and the second end of the fourth branch are open-circuit.

Assignees

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

Inventors

• Wang Yali
• Qu Feng
• Li Biqi
• Fan Xichao

Classifications

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/22

  by structural association with other equipment or articles · CPC title

• H01Q9/045 Primary

  with particular feeding means (for circular polarisation H01Q9/0428) · CPC title

• H01Q1/50

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

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title