Nested Coil Antenna Module for Wireless Charging and NFC
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Solution Overview
Problem
Mobile terminals require improved battery management due to increasing functionality, leading to higher battery usage and a need for efficient wireless recharge capabilities without auxiliary cables.
Innovation Solution
A coil antenna module with multiple coils and a controller for facilitating wireless communication and recharge, utilizing frequency matching circuits to support NFC, wireless charging, and mobile payment functions, with a magnetic sheet for interference reduction and a switch module for selective connection of modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple coils are arranged in the coil antenna module to support various wireless communication functions, then the adaptability and versatility are improved, but the device complexity increases
Solution Approach 1:
The patent implements multi-functionality by integrating multiple coils (first coil for NFC at 13.56 MHz, second coil for wireless charging at 6.78 MHz, third coil for mobile payment at 134.2 kHz) within a single coil antenna module. Each coil is configured to operate at different frequency bands, allowing the mobile terminal to perform near field communication, wireless charging, and mobile payment functions using one unified antenna module rather than separate antennas for each function.
Solution Approach 2:
The patent applies nesting by arranging the coils in a concentric configuration where the second coil is arranged in the first coil, and the third coil is arranged in the second coil. This nested arrangement allows multiple functional coils to be compactly integrated within the same space, reducing the overall device complexity while maintaining the ability to support multiple wireless communication functions simultaneously.
2Adaptability or versatility
If frequency matching circuits are added to match different frequency bands for each coil, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by configuring each coil with its dedicated frequency matching circuit tailored to specific frequency requirements. The first coil is matched with circuits for 13.56 MHz NFC operations, the second coil with circuits for 6.78 MHz wireless charging, and the third coil with circuits for 134.2 kHz mobile payment. This localized optimization allows each coil to operate at peak efficiency for its intended function while maintaining overall system adaptability.
Solution Approach 2:
The patent implements dynamics through a switch module that can selectively connect different coils to different frequency matching circuits based on operational requirements. The controller dynamically switches between coils and their corresponding frequency matching circuits depending on which wireless communication function is currently needed, allowing the system to adapt its circuit configuration in real-time rather than requiring all circuits to be permanently connected.
3Reliability
If a magnetic sheet is added to reduce interference between coils, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a magnetic sheet as an intermediary element positioned between the coils in the coil antenna module. This magnetic sheet acts as a mediator to manage and reduce electromagnetic interference between the closely spaced coils operating at different frequencies. The magnetic sheet provides magnetic shielding and flux management, ensuring that signals from one coil do not interfere with the operation of other coils, thereby improving overall system reliability.
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
Enables efficient wireless communication, recharge, and secure mobile payment transactions by optimizing coil configurations and frequency bands, minimizing interference and enhancing security and functionality.
Implementation Method 1
the coil antenna module includes an insulating sheet; a first coil arranged in a surface of the insulating sheet; a second coil arranged in the first coil; a third coil arranged in the second coil
Implementation Method 2
a magnetic sheet disposed on the surface of the insulating sheet
Data Source
AI summary
There is disclosed a mobile terminal including a first case comprising a battery loading portion, a battery loaded in the battery loading portion, a second case coupled to the first case and configured to cover the battery, a coil antenna module arranged between the second case and the battery, and a controller electrically connected to the coil antenna module and configured to transmit and receive a signal or receive an electric power, wherein the coil antenna module includes an insulating sheet, a first coil arranged in a surface of the insulating sheet, a second coil arranged in the first coil, a third coil arranged in the second coil, and a magnetic sheet disposed on the surface of the insulating sheet, and ends of the first, second and third coils are arranged in the surface of the insulating sheet or dividedly arranged in both surfaces of the insulating sheet. The mobile terminal may realize the coil antenna module including a plurality of coils configured to perform diverse manners of wireless communication in a limited area.