Dual-polarized antenna and antenna array

1. A dual-polarized antenna, comprising:

a ground plate, a feeding part, and a radiant plate,

wherein the feeding part is configured to feed an electromagnetic wave signal into the radiant plate and comprises a first feeding part and a second feeding part, the ground plate is disposed at the bottom of the feeding part, and the radiant plate is disposed on the top of the feeding part;

wherein the first feeding part comprises a first dielectric plate, a first feeding layer, and a first transmission line, wherein the first feeding layer is disposed on one surface of the first dielectric plate, the first transmission line is disposed on the other surface of the first dielectric plate and a first port is disposed in the first transmission line, and the first port is configured to feed a signal into the first feeding part;

wherein the second feeding part comprises a second dielectric plate, a second feeding layer, and a second transmission line, wherein the second feeding layer is disposed on one surface of the second dielectric plate, the second transmission line is disposed on the other surface of the second dielectric plate and a second port is disposed in the second transmission line, and the second port is configured to feed a signal into the second feeding part;

wherein the first dielectric plate and the second dielectric plate are perpendicularly installed on the ground plate, the first dielectric plate and the second dielectric plate are placed perpendicularly to each other, and the first transmission line and the second transmission line are separated from each other; and

wherein the dual polarized antenna further comprises:

a first opening disposed in the first dielectric plate, the first opening extends from the bottom to the top of the first dielectric plate;

a second opening disposed in the second dielectric plate, the second opening extends from the top to the bottom of the second dielectric plate, and the first dielectric plate and the second dielectric plate are joined by using the first opening and the second opening so as to be placed perpendicularly to each other;

a first groove disposed at the first feeding layer, the first groove extends from the top to the midst of the first feeding layer and comprises a first slot and a second slot connected with the first slot, and the first opening penetrates through the second slot and extends to the first slot; and

a second groove is disposed at the second feeding layer, the second groove extends from the top to the midst of the second feeding layer and comprises a third slot and a fourth slot connected with the third slot, and the second opening penetrates into the third slot.

2. The dual-polarized antenna according to claim 1 , wherein:

the radiant plate comprises a radiating layer, the radiating layer is disposed on a lower surface of the radiant plate, and the feeding part feeds a signal into the radiating layer in a coupling manner.

3. The dual-polarized antenna according to claim 2 , wherein:

a shape of the radiating layer is one of a 4N-regular-polygon, a hollow 4N-regular-polygon, a circle, and an annulus, wherein N is an integer greater than or equal to 1.

4. The dual-polarized antenna according to claim 1 , wherein:

the first port is disposed at an end of the first transmission line, and extends from the bottom to the top of the first dielectric plate; and

the first transmission line further comprises a first part of transmission line, a second part of transmission line, and a third part of transmission line, the first part of transmission line extends from an end of the first port to the top of the first dielectric plate and is parallel with the first opening, the second part of transmission line spans over the first opening and is perpendicularly connected to the first part of transmission line, and the third part of transmission line perpendicularly extends from an end of the second part of transmission line to the bottom of the first dielectric plate.

5. The dual-polarized antenna according to claim 1 , wherein:

the second port is disposed at an end of the second transmission line, and extends from the bottom to the top of the second dielectric plate; and

the second transmission line comprises a fourth part of transmission line, a fifth part of transmission line, and a sixth part of transmission line, the fourth part of transmission line extends from an end of the second port to the top of the second dielectric plate and is parallel with the second opening, the fifth part of transmission line is perpendicularly connected to the fourth part of transmission line, and the sixth part of transmission line perpendicularly extends from an end of the fifth part of transmission line to the bottom of the second dielectric plate.

6. The dual-polarized antenna according to claim 5 , wherein:

the midst of the fifth part of transmission line is bent towards the bottom of the second dielectric plate to form a bending part so as to prevent the second opening from penetrating through the fifth part of transmission line.

7. The dual-polarized antenna according to claim 1 , further comprising a pair of connectors, one of the pair of connectors is electrically connected to the first port, the other one of the pair of connectors is electrically connected to the second port, and the pair of connectors are configured to feed signals into the first feeding part and the second feeding part.

8. An antenna array, comprising a pair of the dual-polarized antennas according to claim 1 and a pair of housings, wherein each of the pair of housings is secured to the ground plate and comprises multiple separation walls, and the separation walls form a fence configured to fence the pair of dual-polarized antennas.

9. The antenna array according to claim 8 , further comprising a grounding strip array that is located between the pair of housings and that is configured to improve isolation between the pair of dual-polarized antennas.

10. The antenna array according to claim 9 , wherein:

the grounding strip array comprises two groups of axisymmetric grounding strips, an axis of axial symmetry is located at a perpendicular bisector of the pair of the dual-polarized antennas, heights and lengths of each group of grounding strips progressively decrease from an outside to an inside, the outside is close to the pair of dual-polarized antennas, and the inside is close to the axis of the axial symmetry.

11. The antenna array according to claim 10 , wherein:

the grounding strip array is one of a metallic strip array, a ferrite strip array, and a left-handed material strip array.

12. The antenna array according to claim 8 , further comprising a radome, and the radome covers the antenna array.