Base station, antenna and phase shifting device

Abstract

The invention provides a base station, an antenna and a phase shifting device. The phase shifting device comprises a fixed dielectric plate, a movable dielectric plate and a limiting part, the pivoting end of the movable dielectric plate is pivotally arranged on the fixed dielectric plate, the fixed dielectric plate is provided with a fixed transmission line, the fixed transmission line extends along the rotational motion path of the free end of the movable dielectric plate, and signal output ports are respectively formed at the two ends of the fixed transmission line; at least one surface of the movable dielectric plate is provided with a movable transmission line, and the movable transmission line is electrically conducted with the signal input port on the fixed dielectric plate; and the limiting part is arranged above the fixed dielectric plate in parallel along the extension path of the fixed transmission line, so that the limiting part and the fixed transmission line jointly define an arc-shaped gap for the free end of the movable dielectric plate to rotate to realize phase shift. The phase shifting device is compact in overall structure, easy to install, small in occupied space, good in phase shifting performance and particularly suitable for a 5G Mass i veM I MO electrically tunable antenna.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a phase shifting device, an antenna configured with the phase shifting device, and a base station configured with the antenna. Background technique [0002] In mobile communications, an electrically adjustable antenna usually requires a phase shifter to change the phase difference of each array element, thereby controlling the spatial orientation of the beam. Especially in 5G Massive MIMO electronically adjustable antennas, since there are a large number of sub-radiating units arranged in an array, each sub-radiating unit needs to perform synchronous phase control, and the amount of phase shifters is huge. Therefore, how to design a phase shifter with simple structure, stable performance, low cost and high reliability has become an urgent problem in the industry. [0003] At present, the industry provides a sector-shaped sliding phase shifter to solve th...

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Problems solved by technology

[0003] At present, the industry provides a sector-shaped sliding phase shifter to solve the above problems. This sector-shaped sliding phase shifter has the advantages of simple circuit, small structure size and high phase shifting efficiency, but the gap between the sliding guide arm and the fixed circuit is It is electrically connected by being close to the coupling, and the change of the coupling gap will bring obvious fluctuations in the electrical index, and even affect the normal operation of the electric adjustable antenna

At present, the method commonly used in the industry is to stabilize the coupling connection structure by means of tight crimping, but this method has the following hidden dangers: 1. In the actual working environment, the elastic crimping structure will lose its elasticity with time and temperature changes It will gradually creep and loosen until it fails; 2. The tight structure directly causes the push-pull force of the transmission structure to increase, especially in the 5G Massive MIMO electronically adjustable antenna. The conventional 32TR electronically adjustable antenna needs to use 32 sets of phase shifters at the same time, and the combined total push-pull The force will bring a huge burden to the transmission structure, which will affect the service life of the compact structure

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