Nested Loop Antenna Module for Stable Wireless Charging Recognition
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Solution Overview
Problem
Existing antenna modules for wireless power transmission and reception face challenges in maintaining a consistent charging recognition ratio regardless of their position, especially when charging small-sized devices, due to empty spaces in the center portion which reduce overlapping regions and coupling strength.
Innovation Solution
The antenna module incorporates an internal loop pattern disposed in the inner circumferential region of an external loop coil, with a connection electrode extending towards the center and a wider line-width connection pattern to increase overlapping regions and coupling strength, ensuring a fixed charging recognition ratio across all regions without increasing the antenna's area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an empty space is left in the center portion of the antenna module, then the manufacturing process is simplified, but the charging recognition ratio decreases due to reduced overlapping regions
Solution Approach 1:
The patent applies the nesting principle by placing the internal loop pattern inside the external loop coil structure. The internal loop pattern is positioned in the inner circumferential region of the external loop coil, creating a nested configuration where one antenna structure is embedded within another. This increases the overlapping regions between transmitter and receiver antennas, thereby improving the charging recognition ratio without complicating the manufacturing process.
2Reliability
If the antenna area is increased to improve overlapping regions, then the charging recognition ratio improves, but the device size increases
Solution Approach 1:
The patent applies dimensionality change by utilizing the vertical stacking arrangement of the internal loop pattern and external loop coil. Instead of expanding the antenna area horizontally, the design creates multiple overlapping regions in the vertical dimension through the stacked configuration. This allows the internal loop pattern to overlap with the external loop coil at multiple points, increasing the effective overlapping region without increasing the overall footprint area of the antenna module.
3Productivity
If the coupling strength between internal loop pattern and external loop coil is increased, then the wireless charging efficiency improves, but the device complexity increases
Solution Approach 1:
The patent applies the merging principle by integrating the internal loop pattern and external loop coil into a unified antenna module structure. The two antenna patterns are positioned in close proximity with multiple overlapping regions, creating strong coupling between them. This merged configuration enhances the magnetic field interaction and coupling strength, thereby improving wireless charging efficiency while maintaining a relatively simple overall structure that does not require additional complex components.
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 enhances the charging recognition ratio and coupling strength between the internal and external loop patterns, improving wireless charging efficiency and recognition ratio, even when a small-sized device is positioned in the center, by increasing overlapping regions and maintaining a consistent charging performance.
Implementation Method 1
an antenna module for wireless power transmission and reception, the module capable of performing wireless power transmission and reception
Data Source
AI summary
Presented is an antenna module for wireless power transmission and reception in which an inner loop pattern is disposed in the inner peripheral area of an outer loop coil so as to provide a constant charging recognition rate regardless of location. The presented antenna module for wireless power transmission and reception comprises: a base substrate; a first antenna which is disposed on the upper surface of the base substrate and includes a first radiation pattern forming a first loop; and a second antenna which is stacked on the upper surface of the base substrate and includes a coil wound along the outer periphery of the first loop to form a second loop.


