Flexible PCB Antenna Module Layout for NFC and MST in Smartphones
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Solution Overview
Problem
The design of smartphone antenna modules for NFC and MST is hindered by limited space due to existing wireless communication components and the metal housing, which affects antenna operation, requiring innovative layouts and structures to accommodate both low-frequency antennas effectively.
Innovation Solution
A flexible PCB antenna module with integrated magnetic sheets and coils, where the coils are arranged in series or parallel, and the magnetic sheets are strategically positioned to minimize interference and optimize space, allowing for efficient operation of NFC and MST antennas without electrical connections between coils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication components and antennas for NFC, MST, LTE, Wi-Fi, and Bluetooth are already housed in smartphones, then wireless communication functionality is comprehensive, but space for installing additional antennas is limited
Solution Approach 1:
The patent combines multiple antenna functions (NFC, MST, wireless charging) into a single integrated antenna module. The flexible PCB integrates multiple coil structures that can perform different wireless communication functions, thereby saving space while maintaining comprehensive wireless communication capabilities.
Solution Approach 2:
The antenna module is designed with multi-functionality, where the same physical structure (flexible PCB with coils) can serve multiple purposes: NFC communication, MST functionality, and wireless charging. This universal design allows one component to replace what would traditionally require multiple separate components.
2Adaptability or versatility
If additional antennas are added to smartphones for NFC and MST, then wireless communication capabilities are enhanced, but design complexity of antenna structures and component layout increases
Solution Approach 1:
Multiple antenna functions are merged into a single integrated module on the flexible PCB, reducing the number of separate components and simplifying the overall design process while maintaining enhanced wireless communication capabilities.
3Strength
If metal housing is used in smartphones, then structural strength and aesthetics are improved, but interference with antenna operation occurs
Solution Approach 1:
The flexible PCB antenna module acts as an intermediary solution that enables antenna functionality to coexist with metal housing. By integrating the antenna system in a specific configuration on the flexible PCB, the design mitigates interference issues while maintaining the advantages of metal housing.
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 operation of NFC and MST antennas within the constrained smartphone space, reducing interference from metal housing and other components, and allows for flexible use of coils for different antenna functions like wireless charging.
Implementation Method 1
a first coil, a second coil and a third coil which are formed in the sheet-like body between the first and second major surfaces
Implementation Method 2
a magnetic sheet which comprises a first sheet portion, a second sheet portion and a third sheet portion
Data Source
AI summary
A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NFC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.