Multi-band dual-polarized antenna and electronic device

Patent metadata

Field	Value
Publication number	US-12394902-B2
Application number	US-202117926205-A
Country	US
Kind code	B2
Filing date	May 7, 2021
Priority date	May 21, 2020
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

A multi-band dual-polarized antenna includes a first radiator and a second radiator, each having a rotationally symmetric structure. The first radiator has two feeding ports that are 90° rotationally symmetric with respect to a geometric center of the first radiator. The second radiator is annular, the first radiator and the second radiator are coplanar, the first radiator is disposed in the second radiator, and an annular gap is provided between the first radiator and the second radiator.

First claim

What is claimed is:

1. An antenna, comprising:
a first radiator including a first rotationally symmetric structure; and
a second radiator including a second rotationally symmetric structure,
wherein the first radiator includes two feeding ports that are 90° rotationally symmetric with respect to a geometric center of the first radiator,
wherein the second radiator is annular, the first radiator and the second radiator are coplanar, the first radiator is disposed in the second radiator, and an annular gap is between the first radiator and the second radiator, and
wherein a first operating frequency band of the second radiator comprises a first frequency band, and a second operating frequency band of the annular gap comprises a second frequency band different from the first frequency band to ensure multi-frequency coverage.

2. The antenna according to claim 1 , wherein the first operating frequency band of the second radiator further comprises a third frequency band.

3. The antenna according to claim 2 , wherein the first frequency band is smaller than the second frequency band, and the second frequency band is smaller than the third frequency band.

4. The antenna according to claim 1 , wherein a first perimeter of an outer contour of the second radiator is twice a first wavelength corresponding to the first frequency band, and a second perimeter of the annular gap is twice a second wavelength corresponding to the second frequency band.

5. The antenna according to claim 1 , wherein a width range of the annular gap is between 0.5 millimeter and 1.5 millimeters.

6. The antenna according to claim 1 , wherein the antenna further comprises a reference ground disposed in parallel with the first radiator, and a distance range between the reference ground and the first radiator is between 3 millimeters and 7 millimeters.

7. The antenna according to claim 6 , wherein a projection area of the second radiator on the reference ground is smaller than an area of the reference ground.

8. The antenna according to claim 1 , wherein the first radiator is made of a square conductive material, and wherein a corresponding length of each side of the first radiator is a quarter of a wavelength corresponding to the second frequency band.

9. The antenna according to claim 1 , wherein the second radiator is made of a square ring-shaped conductive material that is hollow inside, and wherein a length of an outer contour of the second radiator is a quarter of a wavelength corresponding to the first frequency band.

10. The antenna according to claim 9 , wherein a gap is provided on each side of the outer contour of the second radiator, and wherein the gap includes an outward opening.

11. The antenna according to claim 1 , wherein the second radiator is a passive parasitic structure.

12. The antenna according to claim 1 , wherein a first shape of the first radiator does not match a second shape of the second radiator.

13. An electronic device, comprising:
an antenna, wherein the antenna comprises:
a first radiator including a first rotationally symmetric structure; and
a second radiator including a second rotationally symmetric structure,
wherein the first radiator includes two feeding ports that are 90° rotationally symmetric with respect to a geometric center of the first radiator,
wherein the second radiator is annular, the first radiator and the second radiator are coplanar, the first radiator is disposed in the second radiator, and an annular gap is between the first radiator and the second radiator, and
wherein a first operating frequency band of the second radiator comprises a first frequency band, and a second operating frequency band of the annular gap comprises a second frequency band different from the first frequency band to ensure multi-frequency coverage.

14. The electronic device according to claim 13 , wherein the first operating frequency band of the second radiator further comprises a third frequency band.

15. The electronic device according to claim 13 , wherein a first perimeter of an outer contour of the second radiator is twice a first wavelength corresponding to the first frequency band, and a second perimeter of the annular gap is twice a second wavelength corresponding to the second frequency band.

16. The electronic device according to claim 13 , wherein a width range of the annular gap is between 0.5 millimeter and 1.5 millimeters.

17. The electronic device according to claim 13 , wherein the antenna further comprises a reference ground disposed in parallel with the first radiator, and a distance range between the reference ground and the first radiator is between 3 millimeters and 7 millimeters.

18. The electronic device according to claim 13 , wherein the first radiator is made of a square conductive material, and wherein a corresponding length of each side of the first radiator is a quarter of a wavelength corresponding to the second frequency band.

19. The electronic device according to claim 13 , wherein the second radiator is made of a square ring-shaped conductive material that is hollow inside, and wherein a length of an outer contour of the second radiator is a quarter of a wavelength corresponding to the first frequency band.

20. The electronic device according to claim 13 , wherein the electronic device feeds a multiple-input multiple-output (MIMO) signal to the antenna through the two feeding ports.

Assignees

• Huawei Tech Co Ltd

Inventors

• Shen Yunpeng
• Zhang Yuzhen
• Ma Ning
• Wang Kemeng

Classifications

• H01Q9/045 Primary

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

• H01Q5/378

  Combination of fed elements with parasitic elements · CPC title

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title

• H01Q5/342

  for different propagation modes (H01Q5/314 takes precedence) · CPC title

• H01Q1/24

  with receiving set · CPC title