Dual Polarized Antenna Structure

Patent metadata

Field	Value
Publication number	US-2022006183-A1
Application number	US-201817311198-A
Country	US
Kind code	A1
Filing date	Dec 7, 2018
Priority date	Dec 7, 2018
Publication date	Jan 6, 2022
Grant date	—

Abstract

An antenna structure includes a first signal connector and a second signal connector. The antenna structure further includes a cavity antenna defined by a set of planar walls. The cavity antenna is coupled to the first signal connector and configured to emit a field polarized linearly in a first direction when driven by a signal at the first signal connector. The antenna structure further includes a dipole antenna defined by a pair of arms that are integrated with a wall of the cavity antenna. The dipole antenna is coupled to the second signal connector and configured to a field polarized linearly in a second direction offset from the first direction when driven by a signal at the second signal connector.

First claim

1 . An antenna structure comprising:
a ground plane; a first signal connector; a second signal connector; a cavity antenna coupled to the ground plane and the first signal connector and defined by a planar walls that include a first wall that is parallel to the ground plane, wherein the cavity antenna includes a cavity and is configured to emit a linearly polarized field that is polarized in a first direction when driven by a signal at the first signal connector; and a dipole antenna defined by a pair of arms that are integrated with the first wall, wherein the dipole antenna is coupled to the second signal connector and configured to emit a linearly polarized field that is polarized in a second direction offset from the first direction when driven by a signal at the second signal connector.

2 . The antenna structure of claim 1 , wherein the first direction is orthogonal to the second direction.

3 . The antenna structure of claim 1 , wherein the cavity antenna and the dipole antenna each emit substantially only linearly polarized radiation.

4 . The antenna structure of claim 1 , wherein the first signal connector is spaced from the cavity antenna and configured to couple more strongly to the cavity antenna than the dipole antenna.

5 . The antenna structure of claim 1 , wherein the second signal connector is spaced from the dipole antenna and configured to couple more strongly to the dipole antenna than the cavity antenna.

6 . The antenna structure of claim 1 , wherein the arms of the dipole antenna are elongated in a first direction and the first connector is elongated perpendicularly to the first direction.

7 . The antenna structure of claim 6 , wherein the second connector is elongated parallel to the first direction.

8 . The antenna structure of claim 1 , wherein the antenna structure is formed on a substrate that includes an edge to which the cavity is open, and wherein the dipole antenna is located at the edge.

9 . The antenna structure of claim 1 , wherein the cavity is further defined by the ground plane.

10 . The antenna structure of claim 9 , wherein the ground plane is parallel to the dipole arms.

11 . The antenna structure of claim 1 , wherein the cavity comprises a slit extending between the dipole arms at least partway through a second wall of the cavity.

12 . The antenna structure of claim 1 , wherein the dipole arms are located within a convex polygon defining a periphery of the cavity antenna.

13 . The antenna structure of claim 1 , wherein the first connector comprises:
an elongate conductor extending through the cavity and terminating on an opposite side of a second wall of the cavity from the second connector; and a coupling element extending orthogonally to the elongate conductor and parallel to that the second wall of the cavity.

14 . The antenna structure of claim 13 , wherein the second connector is a planar conductor extending parallel to the second wall.

15 . An antenna array comprising:
at least two antennas having an antenna structure, the antenna structure comprising:
a ground plane;
a first signal connector;
a second signal connector;
a cavity antenna coupled to the ground plane and the first signal connector and defined by planar walls including a first wall that is parallel to the ground plane, wherein the cavity antenna includes a cavity and is configured to emit a linearly polarized field that is polarized in a first direction when driven by a signal at the first signal connector; and
a dipole antenna defined by a pair of arms that are integrated with the first wall,
wherein the dipole antenna is coupled to the second signal connector and configured to emit a linearly polarized field that is polarized in a second direction offset from the first direction when driven by a signal at the second signal connector.

16 . An antenna array as claimed in claim 15 , wherein the first and second directions are orthogonal.

17 . An antenna array as claimed in claim 15 , wherein the arms of the dipole antenna are elongate in a third direction and the first connector is elongate perpendicularly to the third direction, and wherein the second connector is elongate parallel to the third direction.

18 . An antenna array as claimed in claim 15 , wherein the antenna structure is formed on a substrate and the dipole antenna is located at an edge of the substrate to which the cavity is open.

19 . An antenna array as claimed in claim 15 , wherein the cavity is further defined by the ground plane, and wherein the ground plane is parallel to the dipole arms.

20 . An antenna array as claimed in claim 15 , wherein the cavity comprises a slit extending between the dipole arms at least part-way through a second wall of the cavity.

Assignees

• Wang Hanyang
• Huawei Tech Co Ltd

Inventors

• Xu Hang
• Gao Steven
• Wang Hanyang
• Zhou Hai

Classifications

• H01Q21/24

  Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)} · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q25/001

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

• H01Q9/16

  with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) · CPC title

• H01Q1/523 Primary

  between antennas of an array · CPC title