Electromagnetic wave absorbing device

The absorbing device addresses noise interference in thin electronic devices by converting electromagnetic waves into heat energy, enhancing design flexibility and signal quality through an absorbing pattern and circuit configuration.

TWI934328BActive Publication Date: 2026-08-01MICRO STAR INTERNATIONAL CO LTD +1
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Patent Information

Application Number
TW113142005
Authority / Receiving Office
TW · TW
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2026-08-01
Estimated Expiration
2044-10-31

AI Technical Summary

Technical Problem

As electronic devices become thinner and lighter, the increased processing frequency of internal components leads to noise interference, reducing the signal-to-noise ratio and complicating the design layout due to diverse noise sources requiring specific electromagnetic absorbers for different frequency bands.

Method used

An absorbing device is positioned outside the antenna clearance area, comprising an absorbing pattern, circuit, and grounding portion, with an attenuator and transmission line, converting electromagnetic waves into heat energy, allowing for flexible design and improved signal-to-noise ratio.

Benefits of technology

The absorbing device enhances design flexibility and improves signal quality by attenuating electromagnetic noise outside the antenna area, providing a greater layout margin and better communication performance.

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Abstract

An absorbing device is disposed outside the antenna clearance area inside an electronic device, and the absorbing device includes an absorbing pattern section, an absorbing circuit, and a grounding section. The length of the absorbing pattern corresponds to the resonant length of the absorbed wave frequency. The absorbing circuit includes at least an attenuator. The grounding section connects the absorbing pattern section and the absorbing circuit. Here, the absorbing pattern section absorbs electromagnetic wave frequencies that may cause antenna interference, and the absorbing circuit converts them into heat energy, thereby achieving an improved signal-to-noise ratio.
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