Base station antennas having double-sided phase shifters and/or rearwardly extending phase shifters and associated phase shifter assemblies
A phase shifter assembly, suitable for a base station antenna, includes a main printed circuit board with opposing first and second primary sides. The main printed circuit board has a plurality of radio frequency (RF) transmission paths on the first primary side and a plurality of RF transmission paths on the second primary side. The phase shifter assembly also includes a first wiper arm rotatably coupled to the main printed circuit board and electrically coupled to the plurality of transmission paths on the first primary side of the main printed circuit board; and a second wiper arm rotatably coupled to the main printed circuit board and electrically coupled to the plurality of transmission paths on the second primary side of the main printed circuit board. Rearwardly extending phase shifter assemblies that are oriented perpendicular to a plane defined by a reflector within a base station antenna are also provided.
1. A base station antenna, comprising:
a reflector; and
a rearwardly extending phase shifter assembly that comprises a first plate that comprises a major surface and one or more mounting flanges extending perpendicular to the major surface,
wherein the phase shifter assembly is mounted to the reflector or a support member via the one or more mounting flanges such that the phase shifter assembly is aligned substantially perpendicular to a plane defined by the reflector or the support member.
2. The base station antenna of claim 1 , wherein the phase shifter assembly further comprises a second plate, the first and second plates arranged back-to-back and extending parallel to each other.
3. The base station antenna of claim 2 , wherein the phase shifter assembly further comprises:
a first main printed circuit board residing on the outer surface of the first plate, the first main printed circuit board comprising a plurality of radio frequency (RF) transmission paths;
a second main printed circuit board residing on the outer surface of the second plate, the second main printed circuit board comprising a plurality of RF transmission paths, wherein the second main printed circuit board is aligned with the first main printed circuit board;
a first wiper rotatably coupled to the first main printed circuit board, the first wiper having a first attachment link; and
a second wiper rotatably coupled to the second main printed circuit board, the second wiper having a second attachment link,
wherein the first attachment link of the first wiper and the second attachment link of the second wiper are each configured to couple their respective wiper to a drive shaft of a mechanical linkage,
wherein the first and second wipers are configured to rotate in concert relative to the first and second main printed circuit boards to thereby adjust lengths of RF transmission paths on respective first and second main printed circuit boards.
4. The base station antenna of claim 3 , comprising a plurality of rearwardly extending phase shifter assemblies, wherein the mechanical linkage of each phase shifter assembly aligns in the same transverse plane.
5. The base station antenna of claim 1 , wherein the phase shifter assembly is mounted to the reflector by the mounting flanges.
6. The base station antenna of claim 1 , wherein the phase shifter assembly is mounted on the support member by the mounting flanges.
7. The base station antenna of claim 1 , further comprising an AISG PING printed circuit board extending perpendicular to the phase shifter assembly.
8. The base station antenna of claim 7 , wherein the phase shifter assembly is coupled to the AISG PING printed circuit board through a blind mated or cabled connection.
9. The base station antenna of claim 1 , further comprising a calibration circuit board extending perpendicular to the phase shifter assembly.
10. The base station antenna of claim 9 , wherein the phase shifter assembly is coupled to the calibration circuit board through a blind mated or cabled connection.
11. The base station antenna of claim 1 , wherein the base station antenna comprises about 10 to about 30 rearwardly extending phase shifter assemblies.
12. A method of assembling a base station antenna, the method comprising:
providing a plurality of phase shifter assemblies, each phase shifter assembly comprising a first and a second plate arranged back-to-back and extending parallel to each other;
mounting each phase shifter assembly to a support member such that the first and second plates are oriented perpendicular to the support member; and
integrating the support member comprising the plurality of phase shifter assemblies mounted thereon into the base station antenna.
13. The method of claim 12 , the method further comprising integrating an AISG PING printed circuit board extending perpendicular to the plurality of phase shifter assemblies.
14. The method of any one of claim 12 , the method further comprising integrating a calibration printed circuit board extending perpendicular to the plurality of phase shifter assemblies.
15. A base station antenna, comprising:
a reflector; and
a plurality of rearwardly extending phase shifter assemblies, wherein each of the phase shifter assemblies are aligned substantially perpendicular to a plane defined by the reflector, and
wherein each phase shifter assembly comprises:
a first and a second plate arranged back-to-back and extending parallel to each other, each plate comprising an outer surface;
a first main printed circuit board residing on the outer surface of the first plate, the first main printed circuit board comprising a plurality of radio frequency (RF) transmission paths;
a second main printed circuit board residing on the outer surface of the second plate, the second main printed circuit board comprising a plurality of RF transmission paths, wherein the second main printed circuit board is aligned with the first main printed circuit board;
a first wiper rotatably coupled to the first main printed circuit board, the first wiper having a first attachment link; and
a second wiper rotatably coupled to the second main printed circuit board, the second wiper having a second attachment link,
wherein the first attachment link of the first wiper and the second attachment link of the second wiper are each configured to couple their respective wiper to a drive shaft of a mechanical linkage,
wherein the first and second wipers are configured to rotate in concert relative to the first and second main printed circuit boards to thereby adjust lengths of RF transmission paths on respective first and second main printed circuit boards.
16. The base station antenna of claim 15 , wherein each phase shifter assembly comprises one or more mounting flanges, each mounting flange being configured to mount the phase shifter assembly to the reflector or a support member.
17. The base station antenna of claim 16 , wherein the plurality of phase shifter assemblies is mounted to the reflector or the support member by the mounting flanges.
18. The base station antenna of claim 15 , wherein the mechanical linkage of each phase shifter assembly aligns in the same transverse plane.
19. The base station antenna of claim 15 , further comprising an AISG PING printed circuit board extending perpendicular to the plurality of phase shifter assemblies.
20. The base station antenna of claim 15 , further comprising a calibration circuit board extending perpendicular to the plurality of phase shifter assemblies.