Wireless Antenna Magnetic Core for Wearable Devices
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Solution Overview
Problem
Existing wireless communication antennas for wearable devices face challenges in providing reliable data transmission with specific radiation direction and range while being miniaturized for compact size and mass production, requiring innovative magnetic core materials and structures.
Innovation Solution
A wireless communication antenna featuring a magnetic body with shape-anisotropic bar-shaped unit ribbons arranged in columns and a solenoid coil with conductive patterns, where the unit ribbons are stacked with non-overlapping boundaries and surrounded by a magnetic wall, enhancing radiation characteristics and magnetic field directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a wireless communication antenna is miniaturized for wearable devices, then the device size is reduced, but the radiation characteristics and data transmission reliability deteriorate
Solution Approach 1:
The patent employs a composite magnetic body structure combining multiple magnetic materials with different properties. The magnetic body includes a first magnetic material and a second magnetic material with different saturation magnetization values, creating a composite structure that optimizes both miniaturization and radiation characteristics through material property differentiation.
Solution Approach 2:
The magnetic body is segmented into multiple regions with distinct magnetic properties. The patent divides the magnetic body into a first region with higher saturation magnetization and a second region with lower saturation magnetization, allowing each segment to contribute differently to the overall antenna performance, thereby maintaining reliability while reducing size.
2Productivity
If the antenna is miniaturized for mass production, then manufacturing efficiency increases, but the radiation directionality and range deteriorate
Solution Approach 1:
The patent utilizes parameter changes in magnetic saturation magnetization to control radiation characteristics. By adjusting the saturation magnetization values of different magnetic material regions, the antenna maintains directional radiation properties while being miniaturized for mass production compatibility.
Solution Approach 2:
Different regions of the magnetic body are assigned different local magnetic qualities. The first region has higher saturation magnetization for strong field generation, while the second region has lower saturation magnetization for field distribution control, creating localized quality variations that preserve radiation directionality in a compact form.
3Device complexity
If a simple magnetic core structure is used, then manufacturing complexity is reduced, but eddy current losses increase
Solution Approach 1:
The magnetic core is segmented into multiple discrete magnetic regions rather than using a solid continuous structure. This segmentation into first and second regions with different magnetic properties interrupts eddy current paths, reducing energy losses while maintaining a relatively simple overall structure suitable for manufacturing.
Solution Approach 2:
The patent uses composite magnetic materials with different electrical and magnetic properties in different regions. This composite approach reduces eddy current losses by creating material boundaries that interrupt current loops, while keeping the structural complexity manageable for production.
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 enables efficient data transmission with improved radiation characteristics and miniaturization, suitable for wearable devices, by reinforcing the magnetic field and reducing eddy current losses, thus addressing the need for compact and reliable wireless communication in wearable devices.
Implementation Method 1
the unit ribbons have shape anisotropy and a radiation direction on a side of the wireless communication antenna
Implementation Method 2
by reinforcing the magnetic field and reducing eddy current losses
Implementation Method 3
by reinforcing the magnetic field and reducing eddy current losses
Implementation Method 4
a solenoid coil including conductive patterns disposed around the magnetic body
Implementation Method 5
a magnetic body including a plurality of bar-shaped unit ribbons arranged in columns... surrounded by a magnetic wall, enhancing radiation characteristics and magnetic field directionality
Data Source
AI summary
A wireless communication antenna includes: a magnetic body including a plurality of bar-shaped unit ribbons arranged in columns, wherein the unit ribbons have shape anisotropy and a radiation direction on a side of the wireless communication antenna; and a solenoid coil including conductive patterns disposed around the magnetic body.