Dielectric phase shifter of base station electric tunable antenna

Abstract

The invention applies to the mobile communication base station antenna and radio frequency field, and provides a dielectric phase shifter of a base station electric tunable antenna. The dielectric phase shifter of the base station electric tunable antenna comprises a cover plate, a bottom plate, a slide mechanism, at least one guide pillar and a feed network, wherein the slide mechanism comprises a slide plate and a phase shifting piece, the phase shifting piece comprises an upper phase shifting piece and a lower phase shifting piece, the slide plate is provided with at least two slide grooves, the phase shifting piece penetrates through and slides in the slide groove, at least two fixing pieces penetrate through the slide plate, the at least one guide pillar is fixed on the bottom plate, the lower phase shifting piece is provided with a guiding groove, the at least one guide pillar penetrates through the guiding groove in the lower phase shifting piece, the feed network is arranged on the bottom plate, and the phase shifting piece moves in a plane space on the surface of the feed network. Accordingly, the dielectric phase shifter of the base station electric tunable antenna achieves phase shifting effects in a large range.

Description

technical field [0001] The invention relates to the fields of mobile communication base station antennas and radio frequencies, in particular to a dielectric phase shifter for base station electrically adjustable antennas. Background technique [0002] The phase shifter is a necessary component applied to the electric antenna of the base station. It can change the beam scanning angle of the array antenna, that is, the downtilt angle. Therefore, the electric antenna can flexibly change the coverage of the antenna beam by adjusting the phase shift position of the phase shifter. scope. In principle, there are generally two ways to realize the passive phase shifter applied to the base station electric antenna: [0003] The first way is to load the medium in the feeder line. In the process of electromagnetic wave transmission, the loading of the medium can change the dielectric constant of the transmission medium, thereby changing the wavelength of the electromagnetic wave, whi...

AI Technical Summary

Problems solved by technology

Using this phase shifting method, the amplitude change of the feeder line is small and the insertion loss is small, but some implementation methods will cause the phase shifting amount to change nonlinearly, and the structure is more complicated to realize

[0005] The existing phase shifter of the first mode, such as the miniaturized TD-SCDMA electronically adjustable smart antenna phase shifter described in the patent document CN 101651242 B, has the disadvantages of large volume, high design complexity and linearity. Degree difference etc.

Especially for ultra-wideband phase shifter design, there are problems such as insufficient phase shift amount and large volume

On the one hand, these problems lead to less matching space in network design, on the other hand, the downtilt angle of the whole machine is not enough and the volume of the whole machine is too large

[0006] In summary, the existing technology obviously has inconvenience and defects in actual use, so it is necessary to improve it.

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