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CN-111293418-B - Radiator assembly for base station antenna and base station antenna

CN111293418BCN 111293418 BCN111293418 BCN 111293418BCN-111293418-B

Abstract

The invention relates to a radiator assembly for a base station antenna, comprising two cross-arranged dipoles, each comprising two dipole arms (1), and two feed lines, each of which is associated with one of the dipoles (1). Each dipole arm (1) is integrally made of sheet metal, and each dipole arm (1) comprises a radiating surface and a leg protruding from the radiating surface at an angle to the radiating surface, said leg being electrically grounded. The invention also relates to a base station antenna comprising such a radiator assembly. The inventive radiator module is simple in structure and can be produced easily and inexpensively.

Inventors

  • LI YUEMIN
  • SHAN LONG
  • YU JUNFENG
  • LIU YABING
  • XU GUOLONG

Assignees

  • 户外无线网络有限公司
  • 康普技术有限责任公司

Dates

Publication Date
20260421
Application Date
20181210
Priority Date
20181210

Claims (20)

  1. 1. A radiator assembly for a base station antenna, the radiator assembly comprising: Two cross-arranged dipoles, each comprising two dipole arms (1); two feed lines (2) each associated with one of the dipoles; an arm support (10) configured to support each dipole arm (1), and -At least one feeder support (5, 6) configured for supporting at least one of the two feeders (2); Characterized in that each dipole arm (1) is integrally made of sheet metal, and each dipole arm (1) comprises a radiating surface (1 a) and a leg (1 b) protruding from the radiating surface at an angle to the radiating surface, said leg (1 b) being electrically grounded; The arm support (10) comprises one foot (13), one central recess (12) and four arm supports (11) surrounding the central recess, the foot (13) being configured for fixing the arm support (10) to a base plate or reflector of a base station antenna, the central recess (12) being configured for accommodating the at least one feeder support (5, 6) and a leg of each dipole arm, and the arm supports (11) being configured for supporting the respective dipole arm (1).
  2. 2. Radiator assembly for a base station antenna according to claim 1, characterized in that the radiating surfaces (1 a) of the dipole arms (1) are each mounted on one of the respective arm supports (11).
  3. 3. Radiator assembly for a base station antenna according to claim 2, characterized in that each arm support (11) is provided with a cover (4) respectively, the radiating surface (1 a) of each dipole arm (1) being clamped between the arm support (11) and the associated cover (4) respectively.
  4. 4. A radiator assembly for a base station antenna according to claim 3, characterized in that each arm support (11) is snap-connected with one of the mating covers (4).
  5. 5. Radiator assembly for a base station antenna according to claim 1, characterized in that the arm support (10) comprises a support structure for supporting the radiating face (1 a) of each dipole arm (1), the support structure comprising an outer ring (20), an inner ring (22) and ribs (21) connecting the outer ring with the inner ring.
  6. 6. Radiator assembly for a base station antenna according to any of claims 1 to 5, characterized in that the arm support (11) has a plurality of openings (23) respectively.
  7. 7. Radiator assembly for a base station antenna according to any of claims 1-5, characterized in that the two feed lines (2) are each integrally made of sheet metal and that the two feed lines (2) each comprise two legs (2 a, 2 b) and a bottom edge (2 c) connecting the two legs (2 a, 2 b).
  8. 8. The radiator assembly for a base station antenna according to claim 7, characterized in that the at least one feeder support comprises one first feeder support (5) holding the bottom edges (2 c) of the two feeder lines (2) and having the bottom edges (2 c) of the two feeder lines (2) spaced apart from each other.
  9. 9. Radiator assembly for a base station antenna according to claim 8, characterized in that the first feeder support (5) comprises: a body (5 a) having a first side and a second side opposite the first side; A first snap element (5 b) which is formed on the first side and is configured for forming a snap connection with the bottom edge (2 c) of one of the power supply lines (2), and A second snap element (5 c) which is formed on the second side and is configured for forming a snap connection with the bottom edge (2 c) of the other feeder (2).
  10. 10. Radiator assembly for a base station antenna according to claim 9, characterized in that the first feeder support (5) further comprises two through holes (5 d) configured for receiving two legs (2 a, 2 b) of the one feeder (2).
  11. 11. Radiator assembly for a base station antenna according to claim 9 or 10, characterized in that the first feeder support (5) further comprises at least one third snap element (5 e) protruding from its body (5 a), the third snap element (5 e) being configured for forming a snap connection with the leg (1 b) of the respective dipole arm (1).
  12. 12. Radiator assembly for a base station antenna according to claim 7, characterized in that the at least one feeder support comprises one second feeder support (6) configured for guiding the respective legs of the two feeder wires (2).
  13. 13. Radiator assembly for a base station antenna according to claim 12, characterized in that the second feeder support (6) comprises a body (6 a) and four through holes (6 b) made in the body, configured for receiving one of the legs (2 a, 2 b) of one of the feeders (2), respectively.
  14. 14. Radiator assembly for a base station antenna according to claim 12 or 13, characterized in that the second feeder support (6) further comprises at least one snap element (6 c) protruding from its body (6 a), the snap element (6 c) of the second feeder support being configured for forming a snap connection with the leg (1 b) of the respective dipole arm (1).
  15. 15. Radiator assembly for a base station antenna according to any of claims 1 to 5, characterized in that the radiating surfaces (1 a) of the dipole arms (1) each have a central opening.
  16. 16. Radiator assembly for a base station antenna according to any of claims 1 to 5, characterized in that the dipole arms (1) each have at least one tab (1 c) bent out with respect to the radiating plane (1 a).
  17. 17. Radiator assembly for a base station antenna according to claim 16, wherein the tab (1 c) is bent over an angle of 80 ° to 100 ° with respect to the radiating surface (1 a).
  18. 18. Radiator assembly for a base station antenna according to claim 16, characterized in that the tab (1 c) has a rectangular profile.
  19. 19. Radiator assembly for a base station antenna according to any of claims 1 to 5, characterized in that the leg (1 b) of each dipole arm (1) is bent at an angle of 80 ° to 100 ° with respect to the radiating surface (1 a) of the respective dipole arm (1).
  20. 20. Radiator assembly for a base station antenna according to any of claims 1 to 5, characterized in that the feed line (2) is electrically connected to a feed circuit of a feed board (3) which is formed as a printed circuit board or to a phase-stabilizing cable for the feed.

Description

Radiator assembly for base station antenna and base station antenna Technical Field The present invention relates to the field of communications, and more particularly to a radiator assembly for a base station antenna and a base station antenna comprising such a radiator assembly. Background In a mobile communication network comprising a large number of base stations, each base station comprises one or more base station antennas for receiving and transmitting communication signals, the base station antennas may comprise a number of radiator elements, which may also be referred to as radiating elements or antenna elements. The cost of a single radiator assembly has a significant impact on the cost of the overall base station antenna. Miniaturization and cost minimization of the size of the radiator assembly are desirable. WO2016081036A1 discloses a base station antenna comprising a low-band radiator array and a high-band radiator array, wherein each dipole arm of a single low-band radiator assembly is formed by a printed circuit board. Disclosure of Invention The object of the present invention is to provide a novel radiator assembly for a base station antenna and a base station antenna comprising such a radiator assembly, wherein the radiator assembly is simple in structure and can be manufactured easily and inexpensively. According to a first aspect of the present invention there is provided a radiator assembly for a base station antenna, the radiator assembly comprising: Two cross-arranged dipoles, each comprising two dipole arms, and Two feed lines, each of which is associated with one of the dipoles; Wherein each dipole arm is integrally made of sheet metal and each dipole arm includes a radiating face and a leg extending from the radiating face at an angle to the radiating face, the leg being electrically grounded. In the radiator assembly according to the invention, the dipole arms can be stamped from sheet metal, which is simple and inexpensive in terms of manufacturing technology, and the resulting dipole arms can be dimensionally stable. In some embodiments, the radiator assembly may further include: an arm support configured to support each dipole arm, and/or At least one feeder support configured to support at least one of the two feeders. Alternatively, it is also possible for each dipole arm to be supported by a support element, or for each two dipole arms to be supported by a common support element. In some embodiments, the arm support may include one foot configured to secure the arm support to a base plate or reflector of a base station antenna, a central recess configured to receive the feeder support, and four arm supports surrounding the central recess configured to support each dipole arm. In some embodiments, the radiating surfaces of the dipole arms are each mounted on a respective one of the arm supports. The arm support may have substantially the same contour as the radiation surface, for example, and support the radiation surface in a planar shape. For example, it is also possible for the arm support to be embodied in a grid-like or rod-like manner. In some embodiments, each arm support may be provided with a respective cover, the radiating surface of each dipole arm being sandwiched between the arm support and the respective cover. The radiating surface may also be held on the arm support in other ways, for example by means of an interference fit, by means of a screw connection, adhesive bonding, etc. In some embodiments, each arm support may be snap-fit with one of the mating covers. In some embodiments, the arm support may include a support structure for supporting the radiating face of each dipole arm, the support structure including an outer ring, an inner ring, and ribs connecting the outer ring with the inner ring. In some embodiments, the arm support may have a plurality of openings, respectively. In some embodiments, the two power feeding lines may be integrally formed of a metal plate, respectively, and the two power feeding lines may include two legs and a bottom side connecting the two legs, respectively. Alternatively, the feeder may be a coaxial cable. In some embodiments, the at least one feeder support may include a first feeder support that holds the bottom edges of the two feeders and spaces the bottom edges of the two feeders from each other. In some embodiments, the first feeder support may include: A body having a first side and a second side opposite the first side, and/or A first snap element configured on the first side and configured for forming a snap connection with a bottom edge of one of the feeder lines, and/or A second snap element configured on the second side and configured for forming a snap connection with a bottom edge of another feeder line therein. The releasable connection can be established quickly by means of a snap-on element, but other connection means are also conceivable. In some embodiments, the first feeder support may further include t