Antenna phase shift system, antenna and driving device

Abstract

The invention relates to the technical field of mobile communication and discloses an antenna phase shift system, an antenna and a driving device. The antenna phase shift system comprises a voltage output device, the driving device, a sliding bar and a phase shifter. The driving device comprises a stator, a centering force application component and a gear rotor, wherein the stator comprises a resonator arranged in an overlaid mode and a piezoelectric element electrically connected with the voltage output device, the gear rotor is located between the resonator and the centering force application component and is coaxial with the centering force application component, the centering force application component is connected to the gear rotor in an abutting mode, and the resonator generates ultrasonic vibration and drives the gear rotor to rotate. The sliding bar is provided with a rack part meshed with the gear rotor. A moving component of the phase shifter is connected with the sliding bar. The antenna phase shift system is simple in structure and small in occupied space, the applicability of the antenna phase shift system is effectively improved, and the working reliability of the antenna is improved as well.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an antenna phase shifting system, an antenna and a driving device. Background technique [0002] The mobile communication base station antenna usually needs to be tilted downward at a certain angle relative to the horizontal line. This angle is called the antenna downtilt angle or depression angle. By adjusting the antenna downtilt angle, the inclination angle of the beam emitted by the base station antenna array can be adjusted. In the prior art, the inclination angle of the beam emitted by the base station antenna is adjusted mainly through the principle of electrical phase shifting, that is, the electrical downtilt angle of the base station antenna is adjusted. [0003] Adjusting the electrical downtilt angle of the base station antenna is generally realized by the antenna phase shifting system. The existing antenna phase shifting system includes: a drive device w...

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Problems solved by technology

[0005] The disadvantage of this prior art is that the structure of the antenna phase shifting system is relatively complicated, and the volume is too large. When it is applied to a multi-frequency, multi-column electronically adjustable antenna array, the layout of the electronically adjustable antenna array is relatively difficult and the applicability is poor. and, since the antenna phase-shifting system adopts a multi-stage non-metallic transmission pair transmission mechanism, the manufacturing tolerance and deformation of the transmission pair itself cause the adjustment efficiency of the antenna phase-shifting system to be low, and the adjustment accuracy is not high, which in turn causes the base station antenna to work reliably. decreased sex

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