Antenna Module Shielding Layout to Prevent Magnetic Saturation
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Solution Overview
Problem
Wireless charging efficiency and antenna characteristics are degraded due to magnetic saturation of shielding sheets by magnets in antenna modules, especially during fast charging, leading to heat generation issues.
Innovation Solution
An antenna module design featuring an antenna sheet with a magnet array and a shielding sheet with anti-overlap holes to prevent magnetic saturation, where the magnet arrays are accommodated within these holes to maintain optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding sheet is laminated on the antenna sheet to improve shielding performance, then electromagnetic interference protection is enhanced, but the shielding sheet becomes magnetically saturated by the magnet array, degrading shielding performance and charge efficiency
Solution Approach 1:
The patent extracts the harmful magnetic flux path by creating anti-overlap holes in the shielding sheet, removing the portion that would cause magnetic saturation. This allows the shielding sheet to maintain its shielding performance while preventing magnetic saturation that would degrade charge efficiency.
Solution Approach 2:
The shielding sheet is designed with non-uniform structure by introducing anti-overlap holes in specific locations where the magnet array is positioned. This local modification allows different regions of the shielding sheet to have different functions: intact areas provide shielding while hole areas prevent magnetic saturation.
2Extent of automation
If magnets are mounted on the antenna sheet to enable wireless charging, then wireless power transmission is achieved, but the magnets cause magnetic saturation of the shielding sheet, leading to heat generation and performance degradation
Solution Approach 1:
The patent removes the portion of the shielding sheet that would be exposed to strong magnetic fields from the magnet array by creating anti-overlap holes. This prevents magnetic saturation and the associated heat generation while preserving the wireless charging functionality provided by the magnet array.
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
Prevents magnetic saturation of the shielding sheet, thereby maintaining the shielding performance and charge efficiency of the antenna module, reducing heat generation and ensuring reliable wireless charging.
Implementation Method 1
an antenna sheet having a radiation pattern formed thereon and having a magnet array, formed along an outer periphery of the radiation pattern, inserted therein
Implementation Method 2
prevent a shielding sheet from being magnetically saturated (magnetized) by a magnet mounted on an antenna sheet
Implementation Method 3
a shielding sheet laminated on the antenna sheet
Data Source
AI summary
Proposed is an antenna module in which a partial area, which overlaps with a magnet mounted on an antenna sheet, of the entire area of a shielding sheet is punched out to prevent the shielding sheet from being magnetically saturated (magnetized) by the magnet. The proposed antenna module comprises: the antenna sheet having a radiation pattern formed thereon and having a magnet array formed along the outer circumference of the radiation pattern inserted thereto; and the shielding sheet laminated on the antenna sheet, and having an anti-overlapping hole formed in the area overlapping with the magnet array.