Spatial three-dimensional phase shifter for base station antenna

Abstract

The invention relates to a spatial three-dimensional phase shifter for a base station antenna, and the phase shifter comprises a conductor housing and feed network modules, wherein the interior of the conductor housing comprises an upper conductor cavity and a lower conductor cavity, and the feed network modules are respectively disposed in the upper conductor cavity and the lower conductor cavity. A lower feed network disposed on the lower feed network module comprises a first input port and N first output ports. The upper feed network module disposed on the upper feed network module comprises N five-port networks, and each five-port network comprises four second output ports and one second input port connected with one first output port through a transmission line, wherein N is a positive integer. According to the invention, the upper and lower feed networks are connected together through the transmission line, thereby reducing the bandwidth of the feed network by 50%. The upper feed network employs the five-port networks, thereby reducing the number of transmission lines, saving the material, reducing the cost, and facilitating the transportation. The antenna length is 2.5m, and the maximum gain is 23dBi.

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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