Three-mode self-decoupling eight-port MIMO antenna array for 5G mobile terminal

By employing I-shaped main radiating patches, rectangular parasitic patches, and T-shaped slots to excite self-decoupling resonant modes in a three-mode self-decoupling eight-port MIMO antenna array of a 5G mobile terminal, the problems of high isolation between multiple antennas and multi-band coverage are solved, achieving efficient 5G communication performance.

CN122370682APending Publication Date: 2026-07-10ANHUI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202610501786.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-16
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Within the limited space of a smartphone, how to achieve high isolation between multiple antennas to improve the performance of 5G MIMO system while meeting the requirements of multi-band coverage and high integration? Existing self-decoupling designs are difficult to cover 5G wideband or multiple discrete bands.

Method used

Design a three-mode self-decoupling eight-port MIMO antenna array for 5G mobile terminals. It adopts three self-decoupling resonant modes: an I-shaped main radiating patch, a rectangular parasitic patch, and a T-shaped slot. Combined with an L-shaped impedance matching network, it achieves dual-band self-decoupling operation, eliminating the need for external decoupling structures between antenna elements.

Benefits of technology

It achieves coverage of the 3.4-3.6GHz and 3.8-5.6GHz frequency bands within a compact space, with high isolation between antenna elements, improving communication capacity and efficiency, adapting to the thin and light design of mobile terminals, and meeting the high-speed communication requirements of 5G.

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Abstract

The invention discloses a three-mode self-decoupling eight-port MIMO antenna array for a 5G mobile terminal, and belongs to the technical field of mobile communication antennas. The antenna array comprises a dielectric substrate, a metal grounding layer and a vertical side plate simulating a mobile phone frame, wherein four antenna pairs are symmetrically arranged on the inner surface and the outer surface of the side plate to form an eight-port MIMO structure; each antenna pair comprises an inner side I-shaped main radiation patch, an outer side rectangular parasitic patch and a grounding layer center T-shaped gap which excite three self-decoupling resonance modes respectively and are matched with an L-shaped impedance matching network to achieve impedance matching. An external decoupling structure is not needed, double frequency bands of 3.4-3.6 GHz and 3.8-5.6 GHz can be covered, the isolation degree of the antenna unit is high, the envelope correlation coefficient is lower than 0.08, the radiation efficiency is excellent, the overall structure is compact, the integration degree is high, and the antenna meets the use requirements of the 5G mobile terminal for lightening, thinning and high-speed communication.
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