Spatial three-dimensional phase shifter

Abstract

The invention relates to the technical field of communication devices, and specifically relates to a spatial three-dimensional phase shifter. The phase shifter comprises a conductor housing and feed network modules, wherein the interior of the conductor housing is provided with an upper conductor cavity and a lower conductor cavity, and the feed network modules are disposed in the conductor cavities. A lower feed network of the lower feed network module comprises a first input port and N first output ports. The upper feed network of the upper feed network module comprises N four-port networks, and each four-port network comprises three second output ports and one second input port which is connected with one first output port through a transmission line, wherein N is a positive integer. According to the invention, the feed network modules are placed in the conductor cavities, and the upper and lower feed networks are connected through the transmission line. The phase shifter is simple in structure, is easy to install and maintain, and can remarkably improve the production efficiency. The length of an antenna is about 1.9m, and the highest gain reaches 21.5dBi.

Description

technical field [0001] The invention relates to the technical field of communication devices, in particular to a spatial three-dimensional phase shifter. 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 divider, so that the entir...

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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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