Base station antennas having an active antenna module(s) and related devices and methods
Base station antennas include an externally accessible active antenna module releasably coupled to a rear of the housing. The base station antenna housing has a passive antenna assembly that cooperates with the active antenna module.
1. A base station antenna, comprising:
a passive antenna assembly comprising a housing and a reflector in the housing, wherein the reflector comprises a longitudinally extending right side segment and a laterally spaced apart and longitudinally extending left side segment;
an active antenna module coupleable to or coupled to the housing of the passive antenna assembly; and
first and second spaced apart and longitudinally extending coupling brackets, the first coupling bracket extending along a left side of the active antenna module, the second coupling bracket extending along a right side of the active antenna module.
2. The base station antenna of claim 1 , wherein the first and second coupling brackets electrically couple an outer wall of the active antenna module to the reflector.
3. The base station antenna of claim 1 , wherein the first and second coupling brackets comprise RF chokes.
4. The base station antenna of claim 3 , wherein the first segment of the L-shaped body is parallel to and adjacent the outer wall of the active antenna module is a long side segment.
5. The base station antenna of claim 1 , wherein the first and second coupling brackets each comprise an L-shaped body, and wherein a first segment of the L-shaped body is parallel to and adjacent the outer wall of the active antenna module.
6. The base station antenna of claim 5 , wherein the first segment of the L-shaped body merges into a second segment that is orthogonal to the first segment and that is parallel to a rail coupling surface of a rail provided by the housing.
7. The base station antenna of claim 6 , wherein the second segment that is parallel to the rail coupling surface is a short side of the L-shaped body.
8. The base station antenna of claim 7 , wherein the second segment of the coupling bracket is internal to the housing and the first segment projects rearward and outwardly from the housing.
9. The base station antenna of claim 1 , wherein the first and second coupling brackets are provided as a unitary body connected by a laterally extending bracket segment.
10. The base station antenna of claim 1 , wherein the active antenna module comprises a radio unit, a massive MIMO antenna array and a radome, and wherein the radome of the active antenna module faces an external front radome provided by the passive antenna assembly.
11. The base station antenna of claim 10 , wherein the passive antenna assembly comprises an internal radome that extends in front of the radome of the active antenna module and across a rear of the housing.
12. The base station antenna of claim 1 , wherein the first and second coupling brackets are capacitively coupled to the reflector and the active antenna module.
13. The base station antenna of claim 3 , wherein the RF chokes comprise a first RF choke and a second RF choke, wherein, when viewed from a front of the base station antenna, a right side of the first RF choke is capacitively coupled to the active antenna module, wherein a left side of the first RF choke is capacitively coupled to the left side segment of the reflector, wherein a left side of the second RF choke is capacitively coupled to the active antenna module, and wherein a right side of the second RF choke is capacitively coupled to the left side segment of the reflector.
14. The base station antenna of claim 1 , wherein the first and second coupling brackets are capacitively coupled to one or both of the active antenna module or the reflector through at least one radome.
15. The base station antenna of claim 1 , wherein the first and second coupling brackets are capacitively coupled to the active antenna module and the reflector through a first radome of the active antenna module and a second radome of the passive antenna assembly, the first radome coupled to the active antenna module and the second radome residing between the first radome and an external front radome of the passive antenna assembly.
16. The base station antenna of claim 1 , wherein the reflector is galvanically coupled to the active antenna module.
17. The base station antenna of claim 1 , wherein the reflector is capacitively coupled to the active antenna module.
18. The base station antenna of claim 1 , wherein the reflector is capacitively coupled to at least one conductive member of the active antenna module through at least one radome.
19. The base station antenna of claim 18 , wherein the at least one conductive member comprises a side wall and a support frame that is coupled to the side wall, and wherein the support frame is electrically coupled to a ground plane behind a massive MIMO antenna array inside the active antenna module.
20. The base station antenna of claim 1 ,
wherein the active antenna module and/or the housing comprises a mounting interface configured to have a lock member that has a first recessed position and a second extended position, wherein, in the second extended position, the lock member locks the housing and the active antenna module together.
21. The base station antenna of claim 1 , wherein the reflector comprises a laterally and longitudinally extending open space between the right and left side segments aligned with the active antenna module.
22. The base station antenna of claim 1 , wherein the reflector comprises an aperture extending laterally between the right and left side segments, and wherein the active antenna module comprises a radome that extends through and resides in front of the aperture.
23. The base station antenna of claim 1 , further comprising at least one array of low band radiating elements, wherein the at least one array of low band radiating elements extend forward in the housing in front of the reflector.
24. The base station antenna of claim 1 , wherein the first and second coupling brackets are configured as dual band RF chokes.