Space three-dimensional phase shifter of base station antenna

Abstract

The invention relates to a space three-dimensional phase shifter of a base station antenna. The space three-dimensional phase shifter comprises a conductor shell provided with an upper layer conductor cavity and a lower layer conductor cavity, and feed network assemblies arranged in the conductor cavities in each layer; a lower layer feed network arranged in the lower layer feed network assembly comprises a first input port and m+n first output ports; an upper layer feed network arranged in the upper layer feed network assembly comprises m four-port networks and n three-port networks; each four-port network comprises three second output ports and a second input port which is connected with one first output port through a transmission line; and each three-port network comprises two second output ports and a second input port which is connected with one first output port through a transmission line, wherein m and n are both positive integers. The upper layer feed network of the space three-dimensional phase shifter adopts a combination of the three-port networks and the four-port networks, so that phase shifter requirements of different number of vibrators can be satisfied; and meanwhile, the space three-dimensional phase shifter is convenient to install, low in cost, high in antenna gain, and high in directivity.

Description

technical field [0001] The invention relates to the technical field of communication devices, in particular to a spatial three-dimensional phase shifter for a base station antenna. Background technique [0002] At present, the base station electronically adjustable antenna realizes the beam downtilt adjustment of the base station antenna through the phase shifter in the beamforming network, which has the advantages of large adjustable range of downtilt angle, high precision, good pattern control, strong anti-interference ability, and easy control. Therefore, the phase shifter is a necessary component of the base station antenna. This device can adjust the downtilt angle of the antenna beam by changing the relative phase between the antenna elements, thereby facilitating the optimization of the communication network. [0003] The beamforming network design of existing base station antennas uses cables to connect the sub-phase shifter units, or uses cables as part of the power...

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Problems solved by technology

[0003] The beamforming network design of existing base station antennas uses cables to connect the sub-phase shifter units, or uses cables as part of the power divider, so that the entire feed network contains cables of various lengths, and must be guaranteed during processing. The length of each cable is accurate, and the workers must weld carefully according to the requirements when welding, otherwise, the consistency of the antenna pattern will not be guaranteed; secondly, the length processing, classification, management of different cables, and the installation of these cables during production are also difficult. It is extremely complicated, and there are too many solder joints. Each solder joint is an unstable factor for the whole machine. Too many solder joints will greatly increase the influencing factors of the third-order intermodulation of the antenna, increase the repair cost, and increase the production cost; in addition , the cables used in the existing antennas are all 141 cables. These cables have a large loss, especially in the high frequency band, and the gain of the antenna will be greatly reduced. This requires designing a longer and larger antenna to increase the gain, which increases the Not only that, when a cable has a problem, it will cause all the results to be wrong, the chance of damage is high, and the repair cost is high

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