Antenna Coil Interference Reduction via Segmented Shielding
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Solution Overview
Problem
Conventional electronic devices with non-contact near field communication antennas and wireless charging coils experience interference when they overlap, leading to degraded performance and inability to perform device recognition within the required distance, and conventional shielding solutions increase production costs.
Innovation Solution
The electronic device design positions the wireless charging coil outside or inside the non-contact near field communication antenna, with a shielding portion formed along the shape of the wireless charging coil to prevent overlap and interference, allowing for improved recognition and performance while reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the non-contact near field communication antenna and wireless charging coil are positioned to overlap for space efficiency, then device compactness is improved, but interference between components occurs causing degraded performance
Solution Approach 1:
The device is divided into distinct spatial zones: the antenna is positioned in a first region while the wireless charging coil is positioned in a second region, with at least one coil located outside the area occupied by the antenna. This segmentation prevents electromagnetic interference while maintaining compact overall device volume.
Solution Approach 2:
The patent positions coils in multiple spatial dimensions relative to the antenna - both inside and outside the antenna's projected area, utilizing three-dimensional space arrangement rather than simple planar overlap. This dimensional arrangement allows compact integration without interference.
2Reliability
If conventional shielding sheets are constructed to fit the entire antenna size to prevent interference, then interference prevention is improved, but production costs increase
Solution Approach 1:
Instead of applying shielding material uniformly across the entire antenna area, the patent positions specific shielding portions only in the regions where coils are located - both inside and outside the antenna area. This localized approach provides necessary interference prevention while reducing material usage and production costs.
Solution Approach 2:
The shielding function is extracted from a universal full-coverage approach and applied selectively only where needed - specifically in coil regions. This extraction of the essential shielding function to critical areas reduces overall material requirements while maintaining effectiveness.
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
This configuration prevents interference between the antenna and the wireless charging coil, enhancing the recognition and performance of both components, and reduces production costs by forming the shielding only along the wireless charging coil portion.
Implementation Method 1
the secondary coils produce electromagnetically induced current from the electro-magnetic field occurring in the primary coils
Implementation Method 2
the secondary coils include a shielding sheet for preventing interference with the antenna
Data Source
AI summary
Disclosed is an electronic device including a battery, a case covering the battery, a wireless charging coil positioned between the battery and the case; and a communication antenna positioned between the battery and the wireless charging coil, wherein one of the communication antenna and the wireless charging coil is positioned to surround the other one of the communication antenna and the wireless charging coil, and wherein the communication antenna is spaced from the wireless charging coil by a predetermined distance and prevents interference between the communication antenna and the wireless charging coil.