Phase-shifting frequency-selecting device and multi-frequency antenna

Abstract

The invention provides a phase-shifting frequency-selecting device and a multi-frequency antenna. The phase-shifting frequency-selecting device comprises a support and a frequency-selecting locking mechanism, the support is used for supporting two rows of phase-shifting racks, the two rows of phase-shifting racks are mutually staggered and oppositely arranged, the support forms a channel for the frequency-selecting locking mechanism to linearly move along the arrangement direction of the two rows of phase-shifting racks, the frequency-selecting locking mechanism comprises a phase-shifting gear suitable for being meshed with any phase-shifting rack, and a locking piece suitable for being in friction contact with limiting teeth provided by the support at the position opposite to the meshed phase-shifting rack. According to the frequency-selecting locking mechanism of the phase-shifting frequency-selecting device, the locking piece of the frequency-selecting locking mechanism abuts against the limiting teeth on the support, so that when the phase-shifting gear of the frequency-selecting phase-shifting mechanism is meshed with any phase-shifting rack, the frequency-selecting phase-shifting mechanism can be locked and fixed, and therefore the frequency-selecting phase-shifting mechanism can stably drive the phase-shifting rack, and thus, the phase-shifting performance is stable.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a phase-shifting and frequency-selecting device and a multi-frequency antenna equipped with the phase-shifting and frequency-selecting device. Background technique [0002] With the increasing number of mobile communication terminal users and the popularization of 5G, the demand for network capacity of sites in mobile cellular networks is increasing, and 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 maximize network capacity and minimize interference. To achieve this purpose, it is usually achieved by adjusting the downtilt angle of the antenna beam on the site. [0003] When the antenna is a multi-frequency antenna, the downtilt angle of the beam is mainly adjusted by mechanical downtilt. Specifically, through a built-in transmission device in the a...

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Problems solved by technology

[0004] However, this method requires the phase-shifting gear to move linearly back and forth inside the transmission device to mesh with any phase-shifting element respectively. Since the moving mode of the phase-shifting gear is mechanical movement, the phase-shifting gear is likely to produce a corresponding phase shift during the moving process. The phase shifter cannot be aligned, or the phase shifter gear vibrates violently when meshing with the phase shifter, which affects the phase shifting effect of the phase shifter, and thus affects the adjustment accuracy of the downtilt angle of the antenna beam

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