Dual-polarized antenna radiating element and base station antenna

Patent metadata

Field	Value
Publication number	US-9698493-B2
Application number	US-201414554769-A
Country	US
Kind code	B2
Filing date	Nov 26, 2014
Priority date	May 29, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

Embodiments of the present invention disclose a dual-polarized antenna radiating element. The dual-polarized antenna radiating element includes four radiators and a connecting part, where the four radiators are arranged in a cross shape, with each two of them oppositely disposed, the four radiators form a radiating plane, one end of each of the radiators is connected to the connecting part, and the other end extends in a direction away from the connecting part. Each of the radiators includes a first radiating arm and a second radiating arm, where the first radiating arm and the second radiating arm are asymmetric. In the embodiments of the present invention, a new resonant frequency band is added by using asymmetric radiating arms, thereby broadening the width of a resonant frequency band, so that the antenna radiating element can adapt to a broader resonant frequency band.

First claim

What is claimed is:

1. A dual-polarized antenna radiating element, comprising:
four radiators; and
a connecting part, the connecting part disposed in a first plane, wherein:
the four radiators are arranged in a cross shape, with each two of them oppositely disposed, one end of each of the radiators is connected to the connecting part, the other end extends in a direction away from the connecting part, and the four radiators form a radiating plane,
each of the radiators comprises a first radiating arm and a second radiating arm, and the first radiating arm and the second radiating arm are asymmetric with respect to length, and
one or a combination of:
(1) the four radiators are symmetric with respect to a 90 degree rotation about an axis perpendicular to the first plane, or
(2) an end of the first radiating arm and an end of the second radiating arm are both bent in a direction parallel to the axis perpendicular to the first plane.

2. The dual-polarized antenna radiating element according to claim 1 , wherein the four radiators are arranged in a cross shape, the first radiating arm comprises a first feeding arm and a first dipole arm, the second radiating arm comprises a second feeding arm and a second dipole arm, the connecting part is located in a first plane, the first dipole arm and the second dipole arm are located in a second plane in parallel with the first plane, the first feeding arm and second feeding arm are inclined to the plane where the connecting part is located, the first feeding arm is configured to connect the first dipole arm and the connecting part, the second feeding arm is configured to connect the second dipole arm and the connecting part, and four groups of the first feeding arms and the second feeding arms form a cross cone-shaped structure.

3. The dual-polarized antenna radiating element according to claim 2 , wherein one end of the first feeding arm is connected to the connecting part and the other end extends in a direction away from the connecting part along an edge of the cross cone, one end of the first dipole arm is connected to the first feeding arm and the other end extends in a direction away from the first feeding arm along a base of the cross cone, an end of the first dipole arm is bent in a manner of being perpendicular to the first dipole arm and extends towards the first plane where the connecting part is located, one end of the second feeding arm is connected to the connecting part and the other end extends in a direction away from the connecting part along an edge of the cross cone, one end of the second dipole arm is connected to the second feeding arm, and the other end extends in a direction away from the second feeding arm along a base of the cross cone, an end of the second dipole arm is bent in a manner of being perpendicular to the second dipole arm and extends towards the first plane where the connecting part is located, and the extension length is greater than the extension length of the end of the first dipole arm.

4. The dual-polarized antenna radiating element according to claim 2 , wherein the radiator is in a trapezoid shape, a round shape, or an oval shape.

5. The dual-polarized antenna radiating element according to claim 3 , wherein the first feeding arm and the second feeding arm of two adjacent radiators are parallel to each other.

6. The dual-polarized antenna radiating element according to claim 2 , wherein the thickness of the first dipole arm is different from that of the second dipole arm.

7. A dual-polarized antenna radiating element, comprising four radiators and a connecting part, wherein:
the four radiators are arranged in a cross shape, with each two of them oppositely disposed, one end of each of the radiators is connected to the connecting part, the other end extends in a direction away from the connecting part, and the four radiators form a radiating plane,
each of the radiators comprises a first radiating arm and a second radiating arm, and the first radiating arm and the second radiating arm are asymmetric, and
the radiator is in a rectangular shape, the first radiating arm comprises a first feeding arm and a first dipole arm, the first feeding arm is connected to the connecting part, the first dipole arm is perpendicular to the first feeding arm and extends towards the second radiating arm, the first dipole arm and the first feeding arm form an L shape and are two right-angle sides of a rectangle formed by the radiators; the second radiating arm comprises a second feeding arm, a second dipole arm and a first bent part, the second feeding arm is connected to the connecting part, the second feeding arm is perpendicular to the first feeding arm, the second dipole arm is perpendicular to the second feeding arm, the second dipole arm extends towards the first dipole arm, the second dipole arm and the second feeding arm form an L shape and are the other two right-angle sides of the rectangle formed by the radiators, and the first bent part is connected to the second dipole arm and extends towards the first feeding arm.

8. The dual-polarized antenna radiating element according to claim 7 , wherein the four radiators form a planar, 2×2 4 pane window-shaped structure, and the first feeding arm and the second feeding arm of two adjacent radiators are parallel to each other.

9. The dual-polarized antenna radiating element according to claim 7 , wherein the first dipole arm and the second dipole arm are in an arc shape.

10. The dual-polarized antenna radiating element according to claim 7 , wherein the second dipole arm of each of the radiators further comprises a second bent part at an end of the second oscillator arm, and the second bent part is connected to the first bent part and the first dipole arm.

11. A base station antenna, comprising:
a feeding network;
a signal input port; and
at least one dual-polarized antenna radiating element, wherein:
the feeding network is connected to the dual-polarized antenna radiating element, and is configured to receive a signal from a base station through the signal input port and feed the dual-polarized antenna radiating element, and the dual-polarized antenna radiating element is configured to radiate the signal;
the dual-polarized antenna radiating element comprises four radiators and a connecting part, the connecting part disposed in a first plane, wherein
the four radiators are arranged in a cross shape, with each two of them oppositely disposed, one end of each of the radiators is connected to the connecting part, the other end extends in a direction away from the connecting part, and the four radiators form a radiating plane,
each of the radiators comprises a first radiating arm and a second radiating arm, and the first radiating arm and the second radiating arm are asymmetric with respect to length, and
one or a combination of:
(1) the four radiators are symmetric with respect to a 90 degree rotation about an axis perpendicular to the first plane, or
(2) an end of the first radiating arm and an end of the second radiating arm are both bent in a direction parallel to the axis perpendicular to the first plane.

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Jinju
• Tang Tao

Classifications

• H01Q25/001

  Crossed polarisation dual antennas (orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161) · CPC title

• H01Q1/247

  with frequency mixer, e.g. for direct satellite reception or Doppler radar · CPC title

• H01Q21/26 Primary

  Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre · CPC title