A base station antenna includes a remote electronic tilt (“RET”) actuator, a phase shifter having a moveable element and a mechanical linkage extending between the RET actuator and the phase shifter. The mechanical linkage includes an adjustable RET linkage that has a first link that has a first connection element, a second link that has a second connection element and a connecting member that includes at least a third link. The adjustable RET linkage includes at least a first hinge and a second hinge.

A base station antenna includes a remote electronic tilt (“RET”) actuator, a phase shifter having a moveable element and a mechanical linkage extending between the RET actuator and the phase shifter. The mechanical linkage includes an adjustable RET linkage that has a first link that has a first connection element, a second link that has a second connection element and a connecting member that includes at least a third link. The adjustable RET linkage includes at least a first hinge and a second hinge.

Radiating elements of first and second linear arrays of radiating elements have respective feed stalks that can reside at an angle to provide a balanced dipole arm with an inner end portion laterally offset to be closer to a right or left side of the base station antenna and reflector than an outer end portion that faces a radome of the base station antenna. The feed stalk can include sheet metal legs and printed circuit boards providing an RF transmission line(s).

A base station antenna includes a remote electronic tilt (“RET”) actuator, a phase shifter having a moveable element and a mechanical linkage extending between the RET actuator and the phase shifter. The mechanical linkage includes an adjustable RET linkage that has a first link that has a first connection element, a second link that has a second connection element and a connecting member that includes at least a third link. The adjustable RET linkage includes at least a first hinge and a second hinge.

A base station antenna includes a remote electronic tilt (“RET”) actuator, a phase shifter having a moveable element and a mechanical linkage extending between the RET actuator and the phase shifter. The mechanical linkage includes an adjustable RET linkage that has a first link that has a first connection element, a second link that has a second connection element and a connecting member that includes at least a third link. The adjustable RET linkage includes at least a first hinge and a second hinge.

An antenna that enables dense packing of radiators includes a plurality of first radiators configured to radiate in a first frequency band and a plurality of second radiators configured to radiate in a second frequency band, the second frequency band having higher frequencies than the first frequency band. each of the plurality of first radiators includes a plurality of dipole arms. Each of the plurality of dipole arms includes a periodic pattern of inductive choke segments, and each of the dipole arms has a broken peripheral current path.

An antenna that enables dense packing of radiators includes a plurality of first radiators configured to radiate in a first frequency band and a plurality of second radiators configured to radiate in a second frequency band, the second frequency band having higher frequencies than the first frequency band. each of the plurality of first radiators includes a plurality of dipole arms. Each of the plurality of dipole arms includes a periodic pattern of inductive choke segments, and each of the dipole arms has a broken peripheral current path.

Disclosed are a base station, and a broadband dual-polarized filtering magneto-electric dipole antenna and a radiation unit thereof. A radiation structure includes two dipoles with a polarization direction orthogonal to each other. Each dipole includes two radiators arranged opposite to each other. A balun structure includes four balun assemblies, each balun assembly includes two balun grounds arranged opposite to each other at an interval, and a feeder line and an open-stub arranged opposite to each other at an interval and electrically connected to each other. One balun ground is electrically connected to one radiator, the other balun ground is electrically connected to the other adjacent radiator. The feeder line and one balun ground are arranged opposite to each other at an interval. The open-stub and the other balun ground are arranged opposite to each other at an interval. The balun grounds are arranged between the feeder line and the open-stub.

Disclosed are a base station, and a broadband dual-polarized filtering magneto-electric dipole antenna and a radiation unit thereof. A radiation structure includes two dipoles with a polarization direction orthogonal to each other. Each dipole includes two radiators arranged opposite to each other. A balun structure includes four balun assemblies, each balun assembly includes two balun grounds arranged opposite to each other at an interval, and a feeder line and an open-stub arranged opposite to each other at an interval and electrically connected to each other. One balun ground is electrically connected to one radiator, the other balun ground is electrically connected to the other adjacent radiator. The feeder line and one balun ground are arranged opposite to each other at an interval. The open-stub and the other balun ground are arranged opposite to each other at an interval. The balun grounds are arranged between the feeder line and the open-stub.

A radiating structure assembly system includes a movable conveyor that supports fixtures. Work stations are spaced about the conveyor such that the fixtures are moved sequentially to position the fixtures at the plurality of work stations. A first work station includes a loading assembly for loading the radiating elements on the fixtures. A second work station includes a first automated vertical assembly machine for mounting a first printed circuit board to the radiating element. A third work station includes a second automated vertical assembly machine for mounting a second printed circuit board to the radiating element to create a dipole assembly. A holding device is movable with the conveyor aligns and supports the first and second printed circuit boards relative to the radiating element. A fourth work station includes an unloading assembly for removing the dipole assembly from the conveyor.