Wireless Antenna Magnetic Body Segmentation for Noise Reduction
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Solution Overview
Problem
Wireless communication antennas used in mobile devices for electronic payments experience noise generation due to changes in the volume of magnetic bodies when an electric field is applied, affecting the reliability of data transmission.
Innovation Solution
A solenoid coil wireless communication antenna with a magnetic body composed of divided magnetic pieces arranged perpendicular or parallel to the magnetic flux direction, and stacked magnetic layers with offset interfaces, reducing noise by minimizing volume changes and maintaining high magnetic permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a solenoid coil structure with a magnetic body is used for wireless communication antenna, then the antenna can be applied to mobile devices for electronic payments, but noise occurs due to volume change of the magnetic body when electric field is applied
Solution Approach 1:
The magnetic body is divided into multiple magnetic pieces arranged side by side in the direction perpendicular to the magnetic flux direction. This segmentation reduces the volume change of each individual magnetic piece when electric field is applied, thereby reducing noise generation while maintaining the overall functionality of the antenna in mobile devices
2Object-generated harmful factors
If magnetic pieces are arranged side by side to reduce volume change, then noise generation is reduced, but the magnetic permeability may be affected
Solution Approach 1:
The magnetic pieces are specifically arranged in the direction perpendicular to the magnetic flux direction, creating different local properties in different directions. This arrangement reduces volume change in the perpendicular direction (reducing noise) while maintaining magnetic permeability in the flux direction through the coordinated arrangement of pieces
3Object-generated harmful factors
If magnetic layers are stacked with offset interfaces, then volume change is minimized and noise is reduced, but the device structure becomes more complex
Solution Approach 1:
The magnetic body is segmented into multiple layers with offset interfaces, where each layer is divided into magnetic pieces. This segmentation approach minimizes volume change by distributing the magnetic material across multiple offset layers, reducing noise while the modular structure allows for systematic manufacturing
Solution Approach 2:
The magnetic layers are stacked in the direction perpendicular to the magnetic flux direction, adding a dimensional aspect to the arrangement. This vertical stacking with offset interfaces creates a three-dimensional structure that reduces volume change effects while maintaining magnetic 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 solution significantly reduces noise generation and improves the performance of mobile devices by minimizing changes in the magnetic body's volume, enhancing data transmission reliability.
Implementation Method 1
Due to an induced magnetic field generated when an electric field is applied, a change in a volume of a magnetic body may occur
Implementation Method 2
a solenoid coil portion including a core; and a magnetic body disposed in the core and including magnetic pieces arranged side by side in a direction perpendicular to or a direction parallel to a direction of a magnetic flux of the coil portion
Data Source
AI summary
A wireless communication antenna includes a solenoid coil portion including a core; and a magnetic body disposed in the core and comprising magnetic pieces arranged side by side in a direction perpendicular to or a direction parallel to a direction of a magnetic flux of the coil portion.