Dielectric sliding type phase shifter and base station antenna

Abstract

The invention discloses a dielectric sliding type phase shifter and a base station antenna. The dielectric sliding type phase shifter comprises a cavity, a feed network and a phase shifting unit. Thefeed network includes a functional circuit and phase shifting circuits. The surfaces of the phase shifting circuits are covered with dielectric plates, by rotating the dielectric plates, the length ofthe phase shifting circuits covered by the dielectric plates can be changed, and then the electrical length of a transmission line can be changed to realize phase adjustment. Furthermore, the phase shifting circuits and the dielectric plates are in an arc shape. Therefore, when the dielectric plates of the phase shifting units rotate around the axis passing through the center of the circle, the dielectric plates are limited within a circle range without exceeding the range of the corresponding phase shifting circuits. That is to say, the processes that the phase-shifting circuits realize phase adjustment are relatively independent. Therefore, functional circuits and phase shifting circuits can be designed independently, the design space of the circuit is greatly improved, the design difficulty of the phase shifter is greatly reduced, and the problem of limited design space of circuits in a traditional dielectric sliding type phase-shifter is solved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a dielectric sliding phase shifter and a base station antenna. Background technique [0002] In the signal coverage process of mobile communication, the electric adjustable antenna is very well adapted to the needs of the industry with its flexible beam adjustment and remote control functions, and is very popular in the field of mobile communication. In recent years, with the in-depth development of mobile communications, the requirements for miniaturization, integration, high performance, and low cost of electronically adjustable antennas have increased the requirements for its core component, the phase shifter. [0003] Phase shifters in mobile communications are generally classified into network sliding type and medium sliding type. The network sliding phase shifter changes the phase by changing the physical length of the transmission path, but this type of pha...

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Problems solved by technology

[0004] However, in the traditional dielectric sliding phase shifter, since most of the circuits are closely covered by the dielectric, and there is cross interference between the modules, they are uniformly affected by the sliding media

Therefore, the design space of the phase shifter circuit is limited, and the design difficulty and the complexity of the structure of the phase shifter are increased.

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