NFC Antenna Assembly Snap-Fit Connector Design
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Solution Overview
Problem
Traditional NFC antennas face limitations due to unstable contact resistance, loose connections, restricted layout, and bulkiness, which hinder miniaturization and effective signal transmission, especially when exposed to metal materials and user handling.
Innovation Solution
A NFC antenna assembly featuring a snap-fit connector system with a shell, male, and female connectors, and an antenna circuit formed on the shell and connectors, ensuring stable electrical connections and flexible mounting options, utilizing electroless copper plating for precise signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a FPC with exposed gold feeding point is used to connect NFC antenna to PCB, then electrical connection is established, but contact resistance becomes unstable and connection becomes loose after frequent disassembly
Solution Approach 1:
The patent integrates the connector directly with the PCB board, merging two previously separate components (connector and board) into one unified structure. This eliminates the need for separate connection interfaces that could loosen over time, ensuring stable electrical connection between the NFC antenna and main board throughout the product lifecycle.
2Manufacturing precision
If traditional FPC-based NFC antenna is used, then antenna function is achieved, but thickness is large making miniaturization difficult
Solution Approach 1:
The patent extracts and eliminates the FPC component from the traditional NFC antenna structure, retaining only the essential antenna elements and integrating them directly onto the PCB. This removal of the bulky FPC layer significantly reduces the overall thickness of the NFC antenna assembly while maintaining its functional performance.
3Adaptability or versatility
If NFC antenna is placed on back shell with exposed feeding point, then antenna signal can be transmitted, but mounting position is restricted by metal interference and component layout
Solution Approach 1:
The patent designs the connector as an integrated PCB component that can accommodate NFC antennas at multiple different positions on the main board. This universal design allows the same connector structure to support various mounting locations without requiring additional metal shielding or complex layout adjustments, greatly enhancing design flexibility.
Data Source
AI summary
A NFC antenna assembly and a mobile communication device are provided. The NFC antenna assembly including: a shell, a connecting device and an antenna circuit, the connecting device includes a female connector and a male connector configured to connect with the female connector via a snap-fit connection, and the antenna circuit formed on the shell and the male connector and defining first and second ends which are adapted to electrically connect with the female connector via the male connector.