Low Mutual Coupling MISC Antennas

Abstract

The invention discloses a multi-system antenna with low mutual coupling, which comprises a reflector, the reflector comprises two oppositely arranged first ends and second ends; a smart antenna array, the smart antenna array comprises multiple columns of smart antenna sub-arrays The smart antenna sub-arrays each include a plurality of smart antenna array elements; and the base station antenna array, the base station antenna array includes at least two first base station antenna sub-arrays and at least two second base station antenna sub-arrays; the first base station antenna sub-array includes At least one first base station antenna array element, the radiation structure of the first base station antenna array element is in the shape of a "cross", each first base station antenna array element is embedded in the gap between two adjacent smart antenna sub-arrays, And the radiation structure of the first base station antenna element is surrounded by at least four smart antenna elements; the second base station antenna subarray includes at least two second base station antenna elements. The multi-system integrated antenna can reduce the mutual coupling between the base station antenna system and the smart antenna system.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a low mutual coupling MISI antenna. Background technique [0002] With the increase of mobile communication network standards and the coexistence of multiple communication systems, in order to optimize resource allocation, save site and antenna resources, reduce the difficulty of property coordination, and reduce investment costs, co-site and co-location system antennas have gradually become an operational The first choice for commercial construction network. [0003] At present, the multi-system antennas selected by operators usually use the smart antenna eight-channel FA\D system (1880~1920MHz, 2010~2025MHz, 2575~2635MHz) and the base station antenna system ( At the same time, it supports effective integration of four-channel 900MHz system and four-channel 1800MHz system. The traditional antenna integration method, such as the design scheme given in "CN106207490A...

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Problems solved by technology

[0004] However, in the process of realizing the above solution, the inventors found that at least the following problems exist in the prior art: the structure of the second base station antenna element not only has strong mutual coupling with the nested smart antenna element, but also has a strong connection with the surrounding The surrounding smart antenna array elements are strongly coupled to each other; in this way, the mutual coupling between the base station antenna and the smart antenna system is serious, which will seriously affect the radiation performance indicators such as the wave width, front-to-back ratio, and sidelobe of the smart antenna, as well as the circuit performance of standing waves and isolation index

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