Multi-frequency antenna and frequency-selecting and phase-shifting device thereof

Abstract

The invention provides a multi-frequency antenna and a frequency-selecting and phase-shifting device thereof, the frequency-selecting and phase-shifting device controls the states of two positions ofa cylindrical gear through a switching control mechanism, and the cylindrical gear is only engaged with a first linkage gear at a first position; and a linkage box and a driving gear and a driven gearin the linkage box are moved to the corresponding axial positions of a target phase modulation control piece. The cylindrical gear is meshed with the first linkage gear and a second linkage gear at the second position at the same time, the axial position determined when the driven gear is located at the first position rotates in situ, the driven gear drives the target phase modulation control piece corresponding to the axial position, and phase shifting work of the target phase modulation control piece is completed. The position state of the columnar gear is switched through the switching control mechanism, and stable phase shifting of antenna frequency band signals corresponding to the multiple phase modulation control pieces can be achieved through simple control.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, the present invention relates to a multi-frequency antenna and a frequency-selective phase-shifting device thereof. Background technique [0002] With the increasing number of mobile communication terminal users, the demand for network capacity of sites in the mobile cellular network is increasing. At the same time, it is required to minimize the interference between different sites or even between different sectors of the same site, that is, to realize the network Maximize capacity and minimize interference. To achieve this purpose, it is usually achieved by adjusting the downtilt angle of the antenna beam on the station. [0003] Among the two methods of adjusting beam downtilt, mechanical downtilt and electronic downtilt, electronic downtilt has obvious advantages and is the current mainstream and future development trend. Electric downtilt control is mainly d...

AI Technical Summary

Problems solved by technology

[0004] However, the motor used to drive the phase shifter in the traditional transmission device still corresponds to the transmission mechanism of the phase shifter one by one, the number of motors has not been reduced, and the number of drive circuits in the control module has not been reduced as much as the number of motors

If the frequency band of the antenna continues to increase, the structure of the transmission system will be more complex and bulky, which will affect the reliability of the multi-frequency antenna

[0005] The applicant has practiced relevant technical solutions for the above problems, but there is still room for improvement in terms of stable control and simple operation, especially for the situation where one control is more than one, and the improvement space for related structures is still large

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