A Base Station Array Antenna Applied to Active Antenna System

Abstract

The invention provides a base station array antenna applied to an active antenna system. The base station array antenna comprises a medium substrate, a feed network arranged in front of the medium substrate, a grooving floor arranged on the reverse side of the medium substrate, and an intersecting structure in a feed network. A plurality of cross-shaped ring grooves are etched in the grooving floor. A metal baffle board is arranged below the medium substrate. The grooving floor and the metal baffle board are connected through a copper column. By the utilization of the cross-shaped grooves, two kinds of mutual orthogonal polarization and the dual-polarization characteristic of an array are achieved, and the copper column is used for fixing the medium substrate and the baffle board so that the structure can be stable, and has the function of unit isolation. Sixty four units and one hundred and twenty eight ports are adopted for independent feed, and therefore scanning of beams in the x dimension and the y dimension can be achieved. The base station array antenna can cover two common frequency bands of LTE, the isolation degree between the two kinds of polarization within the work frequency bands is high, and the coupling degree among the units is low. Meanwhile, the array antenna is simple in structure, a main body part is achieved only through one circuit board, manufacturing and processing are convenient, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a base station array antenna applied to an active antenna system. Background technique [0002] With the promotion and deployment of LTE networks around the world, a new generation of mobile communication standards is already brewing and being drafted, and there will be newer and higher requirements for antenna technology. As one of the core technologies in LTE, MIMO technology has been gradually perfected in the continuous evolution, but the existing MIMO technology can only make the antenna beam of the base station be adjusted in the horizontal direction, and has a fixed downlink for each user in the vertical direction. Tilt, various beamforming and baseband adjustments can only be based on channel information in the horizontal dimension, and the degrees of freedom in the vertical dimension cannot be fully utilized, so they cannot fully match the actual three-dimensional chann...

AI Technical Summary

Problems solved by technology

As one of the core technologies in LTE, MIMO technology has been gradually perfected in the continuous evolution, but the existing MIMO technology can only make the antenna beam of the base station be adjusted in the horizontal direction, and has a fixed downlink for each user in the vertical direction. Tilt angle, various beamforming and baseband adjustments can only be based on channel information in the horizontal dimension, and the degrees of freedom in the vertical dimension cannot be fully utilized, so they cannot fully match the actual three-dimensional channel

In addition, cell splitting or sector splitting is an important means to expand system capacity, but the current technology cannot achieve sectorization in the vertical direction through the division of downtilt angles.

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