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, wherein the reflector comprises a longitudinally extending right side segment and a laterally spaced apart and longitudinally extending left side segment; and
an active antenna module coupleable to or coupled to the housing of the passive antenna assembly and residing between the right side and left side segments of the reflector, wherein the reflector is capacitively or galvanically coupled to a conductive member(s) of the active antenna module to thereby have the reflector at a common ground plane with a component or components of the active antenna module.
2 . The base station antenna of claim 1 , wherein the reflector comprises an aperture extending laterally and longitudinally 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.
3 . 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.
4 . 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.
5 . The base station antenna of claim 1 , wherein the passive antenna assembly comprises an internal radome that extends in front of and across a rear of the housing.
6 . The base station antenna of claim 1 , wherein the passive antenna assembly is galvanically coupled to the active antenna module.
7 . The base station antenna of claim 1 , wherein the reflector is galvanically coupled to a back of the active antenna module.
8 . The base station antenna of claim 1 , wherein the at least one conductive member comprises a conductive support frame, and wherein the support frame is electrically coupled to a ground plane of a multi-layer printed circuit board behind a massive MIMO antenna array inside the active antenna module.
9 . The base station antenna of claim 1 , wherein the reflector is capacitively coupled to the conductive member(s) of the active antenna module through a radome of the active antenna module.
10 . The base station antenna of claim 1 , wherein the reflector is capacitively coupled to the conductive member(s) of the active antenna module through a first radome provided by the active antenna module and through a second radome provided by the passive antenna assembly.
11 . The base station antenna of claim 1 , wherein feed stalks of radiating elements extend laterally inward, perpendicular to a sidewall of the housing in the housing and in front of the active antenna module.
12 . The base station antenna of claim 1 , wherein feed stalks of radiating elements extend at an oblique angle relative to a primary surface of the right side segment of the reflector and/or the left side segment of the reflector in the housing.