Antenna and communications device

1 . An antenna, wherein the antenna comprises:

a balun structure;

a radiation structure, disposed on the balun structure; and

a coupling structure, disposed on the radiation structure, wherein the coupling structure is an L-shaped stub, the L-shaped stub comprises a first stub and a second stub, one end of the first stub and one end of the second stub are connected to form an L shape, the one end of the first stub is electrically connected to the one end of the second stub, the L-shaped stub is electrically connected to the radiation structure through the other end of the first stub, and the other end of the second stub is not connected.

2 . The antenna according to claim 1 , wherein the coupling structure is in direct electrical connection to the radiation structure, or the coupling structure is in coupled electrical connection to the radiation structure.

3 . The antenna according to claim 1 , wherein the coupling structure and the radiation structure are on a same plane, or the coupling structure and the radiation structure are on different planes.

4 . The antenna according to claim 1 , wherein the second stub of the L-shaped stub is parallel to the radiation structure.

5 . The antenna according to claim 1 , wherein an included angle between the second stub and the radiation structure is greater than or equal to 0° and less than or equal to 180°.

6 . The antenna according to claim 1 , wherein the antenna comprises a plurality of L-shaped stubs, the plurality of L-shaped stubs are separately disposed on the radiation structure.

7 . The antenna according to claim 6 , wherein the plurality of L-shaped stubs are disposed on the radiation structure at regular intervals.

8 . The antenna according to claim 6 , wherein lengths of the plurality of L-shaped stubs are the same or different, and a length of the L-shaped stub is a sum of lengths of the first stub and the second stub.

9 . The antenna according to claim 6 , wherein

the first stubs of at least two of the plurality of L-shaped stubs have a same length, but the second stubs of the at least two L-shaped stubs have different lengths; or

the second stubs of at least two of the plurality of L-shaped stubs have a same length, but the first stubs of the at least two L-shaped stubs have different lengths; or

the first stubs of at least two of the plurality of L-shaped stubs have different lengths, and the second stubs of the at least two L-shaped stubs have different lengths; or

the first stubs of at least two of the plurality of L-shaped stubs have a same length, and the second stubs of the at least two L-shaped stubs have a same length.

10 . The antenna according to claim 6 , wherein directions of the L-shaped stubs are different, and a direction of the L-shaped stub is an extension direction of the other end of the second stub of the L-shaped stub.

11 . The antenna according to claim 1 , wherein at least one of the first stub or the second stub is in a curved shape.

12 . The antenna according to claim 11 , wherein the curved shape is a wavy shape, or a polygonal-line shape, or a sawtooth shape.

13 . The antenna according to claim 1 , wherein that the coupling structure is a conductive structure, and the conductive structure comprises a metal structure; or a printed circuit board (PCB) structure.

14 . The antenna according to claim 1 , wherein the radiation structure includes two radiation arms, and each radiation arm includes four radiation sub-arms.

15 . An antenna apparatus, comprising a first antenna, a second antenna, and a reflection panel, wherein the first antenna and the second antenna are mounted on the reflection panel,

wherein the first antenna comprises:

a balun structure;

a radiation structure, disposed on the balun structure; and

a coupling structure, disposed on the radiation structure, wherein the coupling structure is an L-shaped stub, the L-shaped stub comprises a first stub and a second stub, one end of the first stub and one end of the second stub are connected to form an L shape, the one end of the first stub is electrically connected to the one end of the second stub, the L-shaped stub is electrically connected to the radiation structure through the other end of the first stub, and the other end of the second stub is not connected.

16 . An antenna array, wherein the antenna array comprises the antenna according to claim 1 .

17 . A communications device, wherein the communications device comprises an antenna apparatus, and wherein the antenna apparatus comprises a first antenna, a second antenna, and a reflection panel, wherein the first antenna and the second antenna are mounted on the reflection panel,

wherein the first antenna comprises:

a balun structure;

a radiation structure, disposed on the balun structure; and

a coupling structure, disposed on the radiation structure, wherein the coupling structure is an L-shaped stub, the L-shaped stub comprises a first stub and a second stub, one end of the first stub and one end of the second stub are connected to form an L shape, the one end of the first stub is electrically connected to the one end of the second stub, the L-shaped stub is electrically connected to the radiation structure through the other end of the first stub, and the other end of the second stub is not connected.

18 . The communications device according to claim 17 , wherein the coupling structure is in direct electrical connection to the radiation structure, or the coupling structure is in coupled electrical connection to the radiation structure.

19 . The communications device according to claim 17 , wherein the coupling structure and the radiation structure are on a same plane, or the coupling structure and the radiation structure are on different planes.

20 . The communications device according to claim 17 , wherein the radiation structure includes two radiation arms, and each radiation arm includes four radiation sub-arms.