Cooperative enhancement method for bandwidth and isolation of terminal antenna

By arranging antenna pairs on the edge of the dielectric substrate of the terminal device and attaching metal patches on the inside of the back cover, adjusting their position and size to offset the coupling path, the problems of limited antenna bandwidth and severe mutual coupling in the terminal device are solved, and the synchronous optimization of antenna performance is achieved.

CN120657443APending Publication Date: 2025-09-16XI AN JIAOTONG UNIV
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Patent Information

Application Number
CN202511003465.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-21
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

In terminal devices, high-density antenna layouts have limited bandwidth and severe mutual coupling. Existing technologies make it difficult to achieve simultaneous optimization of antenna performance without increasing frame space.

Method used

An antenna pair is arranged at the edge of the dielectric substrate, and a metal patch is attached to the inside of the back cover of the terminal device. The design is such that multiple sub-metal patches are arranged along a specific direction. By adjusting the position and size of the patches to offset the antenna coupling path, bandwidth expansion and isolation improvement are achieved.

Benefits of technology

The communication performance of the antenna has been significantly improved, with the bandwidth expanded by 1.6-1.7 times, the isolation increased by 6.8dB, and the efficiency significantly improved.

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Abstract

According to the terminal antenna bandwidth and isolation cooperative enhancement method, an antenna is arranged on the edge of a dielectric substrate, one face of a metal patch is attached to the inner side of a rear cover of terminal equipment, the other face of the metal patch is opposite to one face of the dielectric substrate (middle frame), and the metal patch is composed of a plurality of sub metal patches. On one hand, the sub-metal patches are effectively excited by the antenna to realize bandwidth expansion, and on the other hand, the sub-metal patches counteract an original coupling path to realize isolation enhancement. The metal patches are arranged on the periphery of the antenna, and the size and the position of the metal patches are optimized, so that the antenna can realize wide bandwidth and high isolation under the condition of extremely small clearance and distance. The method can be widely applied to the fields of mobile communication terminal equipment, Internet of Things terminal equipment and the like.
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