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 is provided with a conductor housing and a feed network module, wherein the interior of the conductor housing is provided with a multilayer conductor, and the feed network modules are disposed in the conductor cavity. The phase shifter also comprises an insulating module which is insulated with the conductor housing. The phase shifter also comprises a transmission line which is connected with the adjacent two feed network module, and is insulated with the conductor housing. The lower feed network comprises one first input port and two second output ports, and the upper feed network comprises two four-port networks. Each four-port network comprises three second output ports and one second input port connected with one first output port through a transmission line. The four-port networks are metal conductor strips with a slow wave line or a microstrip printed circuit board with a slow wave line. When the phase shifter is used for the base station antenna, the phase shifter has a larger electric downward inclination angle, and the angle is from 0 to 20 degrees. The phase shifter is provided with six radiators, and the length of the antenna is 0.7m, and the largest gain is 16.5dBi.

Description

technical field [0001] The invention relates to the technical field of communication devices, in particular to a spatial three-dimensional phase shifter applied to base station antennas. 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...

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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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