Notebook Hinge Antenna Layout for Low-Frequency Wi‑Fi Isolation
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Solution Overview
Problem
Antenna performance is compromised in metal environments due to shielding and reduced effectiveness from rotating metal parts in notebook computers, leading to poor low-frequency performance and increased directivity.
Innovation Solution
The electronic device incorporates two antenna modules with coupling ground parts between radiating parts, forming loop paths with metal hinges and housings to enhance isolation and reduce directivity, while being integrated into a metal cavity for resonance and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna modules are arranged in a metal environment (between metal housings and metal hinges), then the antenna modules can be integrated into the notebook computer structure, but the metal parts shield the antenna signal causing poor low-frequency performance
Solution Approach 1:
A non-metal housing is introduced as an intermediary component between the metal hinges and the antenna modules. This non-metal housing acts as a mediator that prevents direct contact between the antenna modules and metal parts, thereby reducing electromagnetic shielding effects while maintaining structural integration. The non-metal material allows antenna signals to pass through without significant attenuation.
2Ease of operation
If the rotation axis rotates (metal hinges pivot), then the notebook computer can open and close, but the antenna effectiveness reduces due to changes in the surrounding metal environment
Solution Approach 1:
The non-metal housing serves as a stable intermediary that remains positioned between the rotating metal hinges and the antenna modules during notebook opening and closing operations. This mediator maintains consistent electromagnetic conditions for the antenna modules regardless of the rotation state, preventing signal degradation caused by changing metal environments.
Solution Approach 2:
The housing structure is designed with different material qualities in different regions: metal housings for structural strength and non-metal sections specifically positioned around the antenna modules for electromagnetic compatibility. This local differentiation of material properties allows the structure to simultaneously achieve mechanical functionality and antenna performance.
3Reliability
If coupling ground parts are configured between radiating parts of two antenna modules, then isolation between antenna modules is enhanced, but device complexity increases
Solution Approach 1:
The coupling ground parts are merged with the existing housing structure rather than being separate components. The ground parts utilize the housing itself as part of the grounding path, combining the structural function of the housing with the electromagnetic function of the ground system. This integration reduces overall device complexity while maintaining isolation performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves low directivity and improved antenna performance at low frequencies, with enhanced isolation and efficiency across various Wi-Fi bands, including Wi-Fi 2.4G, 5G, and 6E, outperforming conventional modules in efficiency and directivity.
Implementation Method 1
The coupling ground part, the first metal housing, the metal hinge, the second metal housing, and the third metal housing together form a loop path
Implementation Method 2
these metal parts form a metal environment around the antenna of the notebook computer, so that an antenna signal is shielded by the metal parts
Data Source
AI summary
An electronic device includes first and second bodies and two antenna modules. The first body includes a first metal housing. The second body is pivotally connected to the first body through two metal hinges and includes a second metal housing, a third metal housing, and a non-metal housing. The non-metal housing is connected to the second metal housing and close to the first body. The two antenna modules are disposed between the second metal housing, the third metal housing, and the non-metal housing, and close to the two metal hinges respectively. Each antenna module includes a radiating part located between the coupling ground part and the corresponding metal hinge and a coupling ground part close to the first metal housing. The coupling ground part, the first metal housing, the metal hinge, the second metal housing, and the third metal housing together form a loop path.