Phase shifter and base station antenna

Abstract

The invention provides a phase shifter and a base station antenna. The phase shifter comprises a substrate, a fixed circuit and a phase shift circuit, wherein the fixed circuit and the phase shift circuit are arranged on the substrate; the fixed circuit comprises an input end and an output end which are separated from each other; the two ends of the phase shift circuit are coupled with the input end and the output end respectively; and the phase shift circuit can rotatably switch the coupling connection position between the phase shift circuit and the input end and the coupling connection position between the phase shift circuit and the output end relative to the substrate. According to the phase shifter provided by the invention, the coupling connection positions between the phase shifting circuit and the input end / the output end can be switched by driving the phase shifting circuit to rotate, so that the circuit length from the input end to the output end is adjusted, and phase adjustment from the input end to the output end is realized; the overall structure is simple and compact, other spaces around the phase shifter are not occupied in the phase shifting adjustment process, and miniaturization design is achieved; and the overall layout of a base station antenna can be simplified when the phase shifter is applied to the base station antenna, and the design integration degree of the antenna is improved so that antenna miniaturization can be achieved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a phase shifter and a base station antenna using the phase shifter. Background technique [0002] With the continuous development and updating of 5G communication technology, the application of AFU electric adjustable antenna (5G base station antenna with electric adjustable function integrated dielectric filter) is more and more widely used. In the AFU electronically adjustable antenna, due to the need to integrate a dielectric filter and a shield cover covering the dielectric filter on the back of the antenna, the remaining available space on the back of the antenna is extremely compact, and a complete phase-shifting network needs to be laid out in this space. Therefore, in the AFU electronically adjustable antenna, the requirement for miniaturization of the phase shifter is getting higher and higher. [0003] At present, due to the high passive intermodulation re...

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Problems solved by technology

[0003] At present, due to the high passive intermodulation requirements of traditional base station antennas, the phase shifters used are usually dielectric sliding phase shifters. The specific principle is to change the dielectric of the transmission line covered by the dielectric block by driving the dielectric block to slide. Constant, so as to change the phase difference between the feed point and the antenna unit, and then realize the adjustment of the downtilt angle of the antenna, but the structure of this type of phase shifter is generally more complicated, and a large space needs to be reserved in the adjustment stroke of the dielectric block for The dielectric block slides, resulting in a large space on the back of the antenna as a whole, which is not conducive to integration in the AFU electric adjustment antenna

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