A multi-antenna MIMO system based on resonant ring decoupling structures

Abstract

The invention discloses a multi-antenna MIMO system based on resonant ring decoupling structured. The system comprises a ground board, antennas, hollow-out grooves, first decoupling structures, second decoupling structures and feeding points, wherein the antennas are arranged in the hollow-out grooves in the edges of the ground board, and are welded to the ground board through the protruded feeding points on the hollow-out grooves; and the first decoupling structures and the second decoupling structures are same in structure and are resonant rings between the antennas on the ground board respectively, and each decoupling structure comprises a concave-type resonant ring, a first L-type resonant ring and a second L-type resonant ring, wherein one end of the concave-type resonant ring is connected with the first L-type resonant ring, and the other end of the concave-type resonant ring is connected with the second L-type resonant ring. The multi-antenna MIMO system solves the problem of poor isolation of a multiple-antenna system when applied to a miniature hand-held terminal, and enables the resonant ring decoupling structures to play a biggest role; through dual-ring superposition, band width of the resonant ring is expanded, thereby improving isolation of the MIMO system; and the structure is suitable for the multi-antenna system.

Description

technical field [0001] The invention belongs to the technical field of handheld terminal antennas, is applicable to 5G communication systems, and particularly relates to a multi-antenna MIMO system based on a resonant ring decoupling structure. Background technique [0002] At present, the size of handheld terminals is developing toward miniaturization and portability. With the shrinking size of terminals, the performance of terminals still needs to be improved, which leaves many problems for hardware engineers. As the only bridge between the terminal and the outside world, the antenna bears the brunt. The quality of antenna performance often determines the quality of communication. In recent years, wireless services have grown rapidly, but wireless spectrum resources are limited. The existing spectrum resources can no longer meet the needs of the society, and it is imminent to develop and explore new spectrum resources. This design is a MIMO system designed based on the 4...

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Problems solved by technology

[0007] In view of the above problems, the present invention equivalently resonant ring into an LC filter circuit, by improving the structure of the resonant ring, so that it can play a maximum role; and double loop superposition, widen the bandwidth of the resonant ring, effectively improve the isolation of the MIMO system , suitable for multi-antenna systems, thus solving the problem of poor isolation of multi-antenna systems applied in small handheld terminals

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