5G dual-polarization base station antenna with high isolation characteristic and wide-angle scanning characteristic

Abstract

The invention belongs to the technical field of base station antennas, and discloses a 5G dual-polarization base station antenna with a high isolation characteristic and a wide-angle scanning characteristic. The 5G dual-polarization base station antenna is composed of a plurality of antenna units and a metal floor, and the plurality of antenna units are arranged on the metal floor in a plane according to a certain rule. According to the 5G dual-polarization base station antenna designed by the invention, the characteristic of high isolation of more than 20dB between units can be realized without introducing an additional decoupling structure, and meanwhile, the problem of directional diagram distortion does not occur in a wide-angle beam scanning process. According to the antenna unit, a micro-strip oscillator antenna of a -45 loading crown-shaped structure and a micro-strip oscillator antenna of a + 45 loading crown-shaped structure are placed on a metal floor in a 90-degree crossing mode, the crown-shaped structure, a grounding radiation patch, a parasitic structure, a feeder line and the like are printed on the two sides of a dielectric plate respectively, and machining and assembling are convenient; and the antenna has the advantages of being simple and compact, high in isolation degree between units, wide in angle scanning, easy to assemble, suitable for batch production and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of base station antennas, and in particular relates to a 5G dual-polarized base station antenna with high isolation characteristics and wide-angle scanning characteristics. Background technique [0002] At present, the 5G base station system is an important part of 5G communication technology. As the entrance and exit of information, the performance of the base station antenna will directly affect the working conditions of the entire communication system. In MIMO technology, theoretically, the more antennas there are, the higher the channel capacity and energy efficiency of the entire system will be. However, the space occupied by the base station antenna is limited. When the number of antennas increases, the distance between the antenna elements decreases, which makes the mutual coupling between the antenna elements serious, resulting in deterioration of port isolation, overall efficiency, and radiation p...

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Problems solved by technology

[0005] The above documents have solved the problem of mutual coupling between antenna elements through various methods, but there are some problems as follows: 1) The decoupling methods of the above documents must be Introducing a decoupling structure between antenna elements, such as: EBG structure, metasurface structure, ADS structure, etc., will increase the complexity of the antenna and the weight of the antenna, and for a compact array with a small element spacing, the antenna elements There is not enough room for other decoupling structures

2) Except for the last document, other documents are discussing the decoupling problem between dual antenna units, and for base station antennas composed of multiple units, whether the decoupling method is still applicable needs to be further verified

[0007] (1) Introducing a decoupling structure between antenna elements in the prior art will increase the complexity and weight of the antenna, and for smaller element spacing Compact array, there is not enough space between antenna elements for other decoupling structures

[0008] (2) For base station antennas composed of multiple units in the prior art, whether the decoupling method is still applicable needs further verification

[0009] (3) The existing technology uses the ADS structure to realize the decoupling between the antenna elements, and for the wide-angle beam scanning situation, the ADS structure generally makes the antenna pattern distorted

If the ADS structure is used to realize the decoupling between the antenna elements, and for the wide-angle beam scanning situation, the ADS structure will generally cause the antenna pattern to be distorted

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