Space stereo phase shifter and phase shifter assembly for base station antenna

Abstract

The invention relates to a spatial three-dimensional phase shifter for a base station antenna. The lower layer feeding network includes a first input port and m+n first output ports; the upper layer feeding network set in the upper layer feeding network component includes m four-port networks and n three-port networks, each four-port The network includes three second output ports and a second input port connected with a first output port through a transmission line; each three-port network includes two second output ports and a first output port connected with a first output port through a transmission line. Two input ports, the m and n are both positive integers. The upper layer feeding network of the present invention adopts a combination of a three-port network and a four-port network, which can meet the requirements of phase shifters with different numbers of oscillators, is easy to install, low in cost, high in antenna gain and good in directivity.

Description

technical field [0001] The present invention relates to the technical field of communication devices, in particular to a spatial stereo phase shifter of a base station antenna. Background technique [0002] At present, the base station ESC antenna realizes the beam downtilt adjustment of the base station antenna through the phase shifter in the beamforming network. Therefore, the phase shifter is a necessary component of the base station antenna, which 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 designs of the existing base station antennas all use cables to connect each sub-phase shifter unit, or use cables as part of the power divider, so that the entire feeder network contains cables of various lengths, which must be guaranteed during processing. The length of each cable is precise, and workers must carefu...

AI Technical Summary

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

Images