Miniaturized Inductive Module With 3D Coil Layout for Higher Inductance
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Solution Overview
Problem
Existing metamaterials used in wireless transmission at 13.56 MHz frequencies are typically large, and increasing coil turns or length to reduce size increases internal resistance, thereby reducing transmission efficiency.
Innovation Solution
A miniaturized inductive module with a metamaterial structure comprising an insulating substrate, two coil units electrically connected through a through hole, and magnetic units that surround the coil units, increasing inductance without increasing coil turns or length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the number of coil turns and the length of the coil are increased to improve the inductance value, then the size of the metamaterial is reduced, but the internal resistance of the coil increases and electromagnetic loss increases, adversely affecting transmission efficiency
Solution Approach 1:
The patent divides the single coil structure into multiple separate coil units (first coil unit, second coil unit, third coil unit, fourth coil unit) arranged in a specific pattern. This segmentation allows the inductance to be increased through the configuration and interaction of multiple smaller coils rather than using a single large coil, thereby reducing the overall footprint while maintaining or enhancing inductance values without proportionally increasing internal resistance.
Solution Approach 2:
The patent transitions from a planar coil arrangement to a three-dimensional configuration by positioning coil units on different layers or levels (front surface, rear surface, and intermediate positions). This spatial arrangement in multiple dimensions enables the metamaterial to achieve higher inductance within a compact volume, effectively reducing the size without requiring excessive coil turns that would increase resistance.
2Volume of moving object
If the number of coil turns and the length of the coil are increased to improve the inductance value, then the size of the metamaterial is reduced, but the transmission efficiency deteriorates
Solution Approach 1:
The patent divides the single coil structure into multiple separate coil units (first coil unit, second coil unit, third coil unit, fourth coil unit) arranged in a specific pattern. This segmentation allows the inductance to be increased through the configuration and interaction of multiple smaller coils rather than using a single large coil, thereby reducing the overall footprint while maintaining or enhancing inductance values without proportionally increasing internal resistance.
Solution Approach 2:
The patent transitions from a planar coil arrangement to a three-dimensional configuration by positioning coil units on different layers or levels (front surface, rear surface, and intermediate positions). This spatial arrangement in multiple dimensions enables the metamaterial to achieve higher inductance within a compact volume, effectively reducing the size without requiring excessive coil turns that would increase resistance.
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 design achieves a significant increase in inductance value, maintaining transmission efficiency and enabling smaller module sizes suitable for implantable medical devices, such as wireless charging devices, by optimizing the arrangement of magnetic units around closed loop coils.
Implementation Method 1
The magnetic unit corresponds in position to a portion of at least one of the coil units, surrounds the portion of the at least one of the coil units
Implementation Method 2
inductive module with a miniaturized metamaterial structure... coil wireless transmission
Data Source
AI summary
An inductive module with a miniaturized metamaterial structure includes an insulating substrate, two coil units, and a magnetic unit. The insulating substrate has opposing first and second surfaces and a through hole extending between the first and second surfaces. The coil units are respectively disposed on the first surface and the second surface of the insulating substrate, and are electrically connected to each other through the through hole. Each of the coil units includes a closed loop coil. The magnetic unit corresponds in position to a portion of the coil unit, surrounds said portion of the coil unit, and has an opening.