Phase shifter, remote electrical tilt system and base station antenna

Abstract

The present disclosure relates to a phase shifter, which includes: a phase shift circuit board with conductive traces printed thereon; and a phase shift circuit board with conductive traces printed thereon; and a slide device with a first tooth section configured to be driven, wherein movement of the first tooth section drives the slide device to slide on the phase shift circuit board. In addition, the present disclosure further relates to a remote electrical tilt system, which includes an actuator, a transmission mechanism, and at least one phase shifter according to the present disclosure, wherein the actuator is configured to drive the transmission mechanism, and the transmission mechanism engages the first tooth section to drive the slide device to slide on the phase shift circuit board. In addition, the present disclosure also relates to a base station antenna which includes the remote electrical tilt system according to the present disclosure. The base station antenna according to the present disclosure may improve the stability of the transmission of the remote electrical tilt system and increase the space utilization of the remote electrical tilt system.

What is claimed: 
     
         1 . A remote electrical tilt system, comprising:
 an actuator;   at least one phase shifter, the phase shifter comprising:
 a phase shift circuit board with conductive traces printed thereon; and 
 a slide device with a first tooth section, the slide device being pivotable relative to the phase shift circuit board; 
   a transmission mechanism that includes a control rod coupled with the actuator and a slider member attached to the control rod, the slider member including a second tooth section that engages the first tooth section; and
 first and second rails that are fixed relative to the phase shift circuit board, the first and second rails configured to engage the slider member and permit sliding motion of the slider member relative to the rails. 
   wherein the actuator is configured to drive the transmission mechanism such that the slider member slides relative to the rails and the second tooth section engages the first tooth section to pivot the slide device relative to the phase shift circuit board.   
     
     
         2 . The remote electrical tilt system defined in  claim 1 , wherein the slider member comprises a toothed rack. 
     
     
         3 . The remote electrical tilt system defined in  claim 1 , wherein the slide device is configured as a sector gear. 
     
     
         4 . The remote electrical tilt system defined in  claim 1 , wherein the phase shift circuit board comprises:
 an input port which is configured to receive a RF signal;   a first output port and a second output port respectively configured to output a corresponding phase-shifted sub-component of the RF signal;   a first conductive trace which extends in a first direction and is coupled to the first output port and the second output port, and   the slide device is configured to couple the input port to the first conductive trace and is able to move with respect to the first conductive trace in the first direction.   
     
     
         5 . The remote electrical tilt system defined in  claim 1 , mounted on a base plate. 
     
     
         6 . The remote electrical tilt system defined in  claim 1 , in combination with a base station antenna.