Antenna Module Coil Layout for Flexible Booster Coil Redesign
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Solution Overview
Problem
Conventional antenna modules with booster coils formed on the back surface of a substrate are difficult to redesign once manufactured, limiting flexibility in coil design.
Innovation Solution
An antenna module comprising a substrate with a first coil, a flexible base material with a second coil and a magnetic sheet overlapping the second coil, and an adhesive layer that allows for independent design changes of the second coil, enabling the booster coil to be redesigned after manufacturing the antenna coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the booster coil is formed on the back surface of the substrate together with the antenna coil, then the structural integration is improved, but the design flexibility of the booster coil deteriorates
Solution Approach 1:
The patent divides the coil structure into two independent parts: the antenna coil formed on the substrate and the booster coil formed on a separate magnetic sheet. This segmentation allows each coil to be designed and manufactured independently, enabling design flexibility for the booster coil while maintaining structural integration when the magnetic sheet is attached to the substrate.
Solution Approach 2:
The magnetic sheet containing the booster coil is positioned to overlap with the antenna coil on the substrate, creating a nested configuration where the booster coil is effectively embedded within the magnetic field region of the antenna coil. This nesting achieves structural integration while preserving independent design capability.
2Ease of manufacture
If the booster coil is formed on the substrate, then the manufacturing process is simplified, but the ability to change coil design afterward deteriorates
Solution Approach 1:
By separating the booster coil from the substrate and placing it on an independent magnetic sheet, the patent enables the magnetic sheet to be manufactured separately with different coil designs. The magnetic sheet is then attached to the substrate, maintaining manufacturing simplicity while allowing design changes in subsequent production batches.
Solution Approach 2:
The patent introduces flexibility into the system by making the magnetic sheet a replaceable component. This allows the booster coil design to be dynamically updated in later production stages without reworking the substrate or antenna coil, enabling adaptive design changes while maintaining a streamlined manufacturing process.
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 allows for flexible redesign of the booster coil, enhances communication distance by optimizing the distance and coverage between coils and the magnetic sheet, and reduces the impact of surface unevenness and stray capacitance.
Implementation Method 1
an adhesive layer bonding the substrate and base material such that the first coil and the magnetic sheet overlap each other
Implementation Method 2
a second coil and a magnetic sheet overlapping the second coil are provided
Data Source
AI summary
Disclosed herein is an antenna module that includes a substrate on which a first coil is provided, a base material on which a second coil and a magnetic sheet overlapping the second coil are provided, and an adhesive layer bonding the substrate and the base material such that the first coil and the magnetic sheet overlap each other.