An antenna structure and a mobile terminal

By designing an antenna structure with matching connection ratio and impedance, the radiation performance of the mobile terminal in hand-held state was optimized, solving the problem of reduced radiation energy of the frame antenna in hand-held state, and achieving efficient radiation in free space.

CN120545666BActive Publication Date: 2026-05-05HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202510054673.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-04
Publication Date
2026-05-05
Estimated Expiration
2044-03-04

AI Technical Summary

Technical Problem

When a mobile device is held in the hand, the radiation energy of the frame antenna decreases significantly, affecting radiation performance and making it difficult to optimize applications while maintaining radiation efficiency in free space.

Method used

Design an antenna structure including a first stub and a second stub connected together, grounded through an inductive structure, and electrically connected to the feed point using an impedance matching circuit. The physical length of the radiator and the distance between the second stub satisfy a certain ratio. Combine the tuning circuit and the feed circuit to optimize the radiation pattern.

Benefits of technology

While ensuring radiation efficiency in free space, the radiation performance of the mobile terminal in hand-held state was optimized, and the communication performance of the antenna was improved.

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Abstract

This application provides an antenna structure and a mobile terminal. The antenna structure includes a radiator and an impedance matching circuit. The radiator includes a first stub and a second stub connected together. The end of the first stub facing away from the second stub is an open end. The first stub includes a feed point. The end of the second stub facing away from the first stub is grounded. The connection point between the first and second stubs is grounded through an inductive structure. The physical length L1 of the first stub and the physical length L2 of the second stub satisfy 4 / 5 ≤ L1 / L2 ≤ 4 / 3. The distance d between the feed point and the end of the first stub facing away from the second stub satisfies d ≤ 1 / 4 × L1. The impedance matching circuit is electrically connected to the feed point and includes an inductor. This application constructs the antenna structure as a co-directional slot antenna, so that the electric fields generated by each part of the radiator of the antenna structure are in the same direction, thereby facilitating the tuning of the radiation pattern of the antenna structure towards the display screen side and optimizing the grip performance of the antenna structure.
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