Small cell base station antennas suitable for strand mounting and related system architectures

Patent metadata

Field	Value
Publication number	US-11223387-B2
Application number	US-201816765254-A
Country	US
Kind code	B2
Filing date	Dec 5, 2018
Priority date	Dec 15, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A small cell base station antenna includes a first backplane, a first linear array of radiating elements extending forwardly from the first backplane, a second backplane that is opposite the first backplane and a second linear array of radiating elements extending forwardly from the second backplane. The first backplane is inclined at a first oblique angle with respect to a vertical axis and the second backplane is inclined at a second oblique angle with respect to the vertical axis.

First claim

That which is claimed is:

1. A small cell base station antenna that has a vertical axis running through a center thereof when the small cell base station is mounted for use, comprising:
a first backplane;
a first linear array of radiating elements that includes at least one radiating element extending forwardly from the first backplane;
a second backplane that is opposite the first backplane;
a second linear array of radiating elements that includes at least one radiating element extending forwardly from the second backplane;
a third backplane that is between the first backplane and the second backplane;
a fourth backplane that is opposite the third backplane; and
a strand passageway that extends through the third and fourth backplanes,
wherein the first backplane is inclined at a first oblique angle with respect to the vertical axis and the second backplane is inclined at a second oblique angle with respect to the vertical axis.

2. The small cell base station antenna of claim 1 , wherein the first backplane is inclined in a first direction and the second backplane is inclined in a second direction that is opposite the first direction.

3. The small cell base station antenna of claim 2 , further comprising:
a third linear array of radiating elements that includes at least one radiating element extending forwardly from the third backplane;
a fourth linear array of radiating elements that includes at least one radiating element extending forwardly from the fourth backplane.

4. The small cell base station antenna of claim 3 , wherein the third backplane is inclined at a third oblique angle with respect to the vertical axis and the fourth backplane is inclined at a fourth oblique angle with respect to the vertical axis.

5. The small cell base station antenna of claim 1 , wherein a 3 dB beamwidth of the first linear array of radiating elements in an elevation plane is between about 25 degrees and about 60 degrees.

6. The small cell base station antenna of claim 1 , wherein the small cell base station antenna is configured to be hung directly or indirectly from a pole-mounted strand.

7. The small cell base station antenna of claim 1 , wherein the first and second oblique angles are each between 2 degrees and 20 degrees.

8. The small cell base station antenna of claim 1 , wherein the first and second linear arrays of radiating elements each comprise a horizontally-extending linear array of radiating elements that has at least three radiating elements.

9. A small cell base station antenna, comprising:
a tubular reflector assembly that has a first side face, a second side face, a third side face and a fourth side face, the first side face being opposite the fourth side face and the second side face being opposite the third side face;
a strand passageway that extends through the first and fourth side faces of the tubular reflector assembly;
a first linear array of radiating elements that extends from the second side face of the tubular reflector assembly; and
a second linear array of radiating elements that extends from the third side face of the tubular reflector assembly.

10. The small cell base station antenna of claim 9 , wherein the second side face of the tubular reflector assembly is inclined at a first oblique angle with respect to a vertically-extending plane that bisects the tubular reflector assembly when the small cell base station antenna is mounted for use, and the third side face of the tubular reflector assembly is inclined at a second oblique angle with respect to the vertically-extending plane.

11. The small cell base station antenna of claim 10 , wherein the second side face of the tubular reflector assembly is inclined in a first direction and the third side face of the tubular reflector assembly is inclined in a second direction that is opposite the first direction.

12. The small cell base station antenna of claim 9 , further comprising:
a third linear array of radiating elements that includes at least one radiating element extending forwardly from the first side face of the tubular reflector assembly; and
a fourth linear array of radiating elements that includes at least one radiating element extending forwardly from the fourth side face of the tubular reflector assembly.

13. The small cell base station antenna of claim 12 , wherein the third first side face of the tubular reflector assembly is inclined at a third oblique angle with respect to the vertically-extending plane and the fourth side face of the tubular reflector assembly is inclined at a fourth oblique angle with respect to the vertically-extending plane.

14. The small cell base station antenna of claim 13 , wherein at least one of the third oblique angle and the fourth oblique angle is greater than the first oblique angle.

15. The small cell base station antenna of claim 9 , wherein the second and third side faces of the tubular reflector assembly are connected by at least one hinge.

16. The small cell base station antenna of claim 9 , wherein the first and second linear arrays of radiating elements are configured to generate an antenna beam that has a generally peanut-shaped cross-section in the azimuth plane.

17. A network of strand-mounted small cell base station antennas, comprising
a first strand that extends along a first set of poles;
a first small cell base station antenna that is mounted on the first strand, the first small cell antenna comprising:
a first backplane;
a first linear array of radiating elements that includes at least one radiating element extending forwardly from the first backplane;
a second backplane that is opposite the first backplane;
a second linear array of radiating elements that includes at least one radiating element extending forwardly from the second backplane;

a second small cell base station antenna that is mounted on the first strand, the second small cell base station antenna being adjacent the first small cell base station antenna, the second small cell antenna comprising:
a third backplane;
a third linear array of radiating elements that includes at least one radiating element extending forwardly from the third backplane;
a fourth backplane that is opposite the third backplane;
a fourth linear array of radiating elements that includes at least one radiating element extending forwardly from the fourth backplane;

a second strand that extends along a second set of poles;
a third small cell base station antenna that is mounted on the second strand, the third small cell antenna comprising:
a fifth backplane;
a fifth linear array of radiating elements that includes at least one radiating element extending forwardly from the fifth backplane;
a sixth backplane that is opposite the fifth backplane;
a sixth linear array of radiating elements that includes at least one radiating element extending forwardly from the sixth backplane;

a fourth small cell base station antenna that is mounted on the second strand, the fourth small cell base station antenna being adjacent the third small cell base station antenna, the fourth small cell antenna comprising:
a seventh backplane;
a seventh linear array of radiating elements that includes at least one radiating element extending forwardly from the seventh backplane;
an eighth backplane that is opposite the seventh backplane;
an eighth linear array of radiating elements that includes at least one radiating element extending forwardly from the eighth backplane,

wherein each of the first through fourth small cell base station antenna is configured to generate a respective antenna beam

Assignees

• Commscope Technologies Llc

Inventors

• Chamberlain John C
• Wolfe Michael R

Classifications

• H04B7/10

  Polarisation diversity; Directional diversity · CPC title

• H01Q21/205

  providing an omnidirectional coverage (turnstile aerials H01Q21/26) · CPC title

• H01Q1/44

  using equipment having another main function to serve additionally as an antenna {, e.g. means for giving an antenna an aesthetic aspect}(H01Q1/27 - H01Q1/34 take precedence) · CPC title

• H01Q1/246 Primary

  specially adapted for base stations · CPC title

• H01Q13/02

  Waveguide horns · CPC title