Base station antenna, transmission device and switching mechanism

Abstract

The invention discloses a base station antenna, a transmission device and a switching mechanism. The switching mechanism includes: a mounting unit; a first transmission unit which is installed on themounting unit, wherein the first transmission unit comprises transmission pieces and a driving assembly used for driving all the transmission pieces to move up and down; and a second transmission unitwhich comprises an abutting piece and a transmission shaft, wherein the abutting piece is rotatably arranged on the transmission piece, the abutting piece is provided with a through hole allowing thetransmission shaft to penetrate through, an inner clamping part arranged in the through hole and an abutting part arranged outside the through hole, and the transmission shaft is provided with an outer clamping part in detachable sleeving transmission fit with the inner clamping part. The switching mechanism can drive output gears in the at least two output gear sets to rotate. The transmission device adopts the switching mechanism, so that power is provided for adjustment of at least two downward inclination angles; and the base station antenna adopts the transmission device, a transmissionsystem is simplified, and the base station antenna can adapt to the increase of the frequency band of the antenna.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a base station antenna, a transmission device and a switching mechanism. Background technique [0002] With the increasing number of mobile communication terminal users, the demand for network capacity of sites in the mobile cellular network is increasing. At the same time, it is required to minimize the interference between different sites or even between different sectors of the same site, that is, to realize the network Maximize capacity and minimize interference. To achieve this purpose, it is usually achieved by adjusting the downtilt angle of the antenna beam on the station. [0003] Among the two methods of adjusting beam downtilt, mechanical downtilt and electronic downtilt, electronic downtilt has obvious advantages and is the current mainstream and future development trend. Electric downtilt control is mainly divided into two categories: built-in and exte...

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Problems solved by technology

[0004] However, the motors used to drive the phase shifter in the traditional transmission still correspond to the phase shifter transmission mechanism one by one, the number of motors has not been reduced, and the number of drive circuits in the control module has not been reduced as much as the number of motors

In this way, not only the cost of the control system and transmission system of the multi-frequency antenna is high, but also the structure of the transmission system is relatively complicated, and the reliability of the antenna is also affected

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