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...

Examples

Embodiment Construction

[0028] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0029] Such as figure 1 As shown, the distance between the array elements is 95mm along the x and y directions. The material of the dielectric plate 1 is FR4_epoxy, the dielectric constant is 4.4, the loss tangent angle is 0.02, and the thickness is 1 mm. The dimensions of the dielectric plate 1 and the floor 3 are both 815mm×815mm, and the size of the metal reflector 5 is 965mm×965mm. The height of the copper column 6 connecting the floor 3 and the metal reflector 5 is 30 mm.

[0030] figure 2 Shown is the hierarchical structure diagram of the element antenna, the feed network 2 (element) has two input ports, where port 1 excites 45° directional polarization, and port 2 excites -45° polarization. The groove on the grooved floor 3 consists of an annular groove and four narrow grooves with a difference of 90°. There are 16 copper pillars 6 ...

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...

Examples

Embodiment Construction

[0028] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0029] Such as figure 1 As shown, the distance between the array elements is 95mm along the x and y directions. The material of the dielectric plate 1 is FR4_epoxy, the dielectric constant is 4.4, the loss tangent angle is 0.02, and the thickness is 1 mm. The dimensions of the dielectric plate 1 and the floor 3 are both 815mm×815mm, and the size of the metal reflector 5 is 965mm×965mm. The height of the copper column 6 connecting the floor 3 and the metal reflector 5 is 30 mm.

[0030] figure 2 Shown is the hierarchical structure diagram of the element antenna, the feed network 2 (element) has two input ports, where port 1 excites 45° directional polarization, and port 2 excites -45° polarization. The groove on the grooved floor 3 consists of an annular groove and four narrow grooves with a difference of 90°. There are 16 copper pillars 6 ...

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