A broadband two-element microstrip mimo antenna based on multivariate parasitic surface structure

Abstract

The invention relates to a broadband two-unit microstrip MIMO antenna based on a multielement parasitic surface structure. The antenna comprises two dielectric substrates, namely a first dielectric substrate and a second dielectric substrate which are sequentially overlaid from top to bottom; the dielectric substrates are the same in size and are made from the same material, and a metal structureis formed on the surface of each dielectric substrate; metal parasitic units in different shapes are arranged on the upper surface of the first dielectric substrate, two excitation metal patches are arranged between the first dielectric substrate and the second dielectric substrate, and the two excitation metal patches are orthogonally arranged. The antenna provided by the invention realizes miniaturization of an antenna structure, the highest miniaturization ratio of a two-unit MIMO antenna can reach 25%, and the miniaturization ratio of a multi-unit MIMO antenna is higher; meanwhile, a unitmicrostrip antenna based on a multi-dielectric-substrate structure and a multi-parasitic-unit radiation structure is expanded in bandwidth while radiation gain is increased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a broadband two-element microstrip MIMO antenna based on multiple parasitic surface structures. Background technique [0002] Mobile communication technology is one of the fastest-growing technical fields today. After the development of the previous 4 generations of mobile communication, the 5G wireless communication technology that has landed can bring a revolutionary impact on people's production and life, and will trigger a new generation. The industrial revolution led by information technology. As long as wireless communication is involved, there must be a device in the system, that is, the antenna device, and the performance of the antenna device also has an important impact on the performance of the entire wireless mobile communication system. Especially in 5G mobile smart devices, there are more antennas. Of course, the most important thing is t...

AI Technical Summary

Problems solved by technology

[0004] First, the antenna units are basically independent, and there is almost no application of aperture sharing technology. Without aperture sharing, the miniaturization of MIMO antennas based on polarization diversity technology will be limited; multiple unit antennas in each MIMO antenna structure It is independently distributed on the dielectric substrate, resulting in a relatively large volume of the entire MIMO antenna system. The more elements in the MIMO antenna, the larger the geometric size of the antenna, which limits the miniaturization of the MIMO antenna to a large extent. degree

[0005] Second, the operating frequency band of the unit antenna in the microstrip MIMO antenna structure is relatively narrow, and it cannot achieve wide-screen operation

The microstrip MIMO antennas in the above literatures all have the problems that the miniaturization of the antenna is difficult and the bandwidth of the microstrip antenna is relatively narrow.

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