NFC Antenna Integration in Metal Mobile Terminal Housing
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Solution Overview
Problem
Existing methods for realizing Near Field Communication (NFC) antennas in mobile terminals, which combine ferrites and flexible printed circuits (FPCs), face difficulties in effectiveness and increase the overall thickness of the terminal, making them less suitable for lightweight designs.
Innovation Solution
A metal antenna radiator is arranged between a metal housing and a surrounding frame in the mobile terminal, with one end coupled to a feed source through a matching circuit and the other end grounded, allowing for self-integration of the NFC antenna without the need to redesign the housing and reducing the use of FPCs, thereby minimizing thickness and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ferrite and flexible printed circuit (FPC) are combined to realize NFC antenna, then NFC functionality is achieved, but the overall thickness of the terminal increases and manufacturing complexity increases
Solution Approach 1:
The patent extracts and removes the FPC component from the traditional ferrite-FPC combination, using only the ferrite material to realize the NFC antenna function. This simplifies the structure and reduces the overall thickness of the terminal while maintaining NFC functionality.
Solution Approach 2:
The patent merges the ferrite material directly with the housing structure, integrating the NFC antenna function into the existing housing design. This eliminates the need for separate FPC layers and reduces the overall thickness requirement.
2Reliability
If ferrite and flexible printed circuit (FPC) are combined to realize NFC antenna, then NFC functionality is achieved, but the manufacturing difficulty increases
Solution Approach 1:
The patent removes the FPC component from the assembly, eliminating the complex integration process between ferrite and FPC. This significantly simplifies the manufacturing process and reduces production difficulty while maintaining NFC functionality.
Solution Approach 2:
The patent integrates the ferrite material directly into the housing structure, combining multiple functions into a single component. This reduces the number of assembly steps and simplifies the manufacturing process.
3Reliability
If ferrite and flexible printed circuit (FPC) are combined to realize NFC antenna, then NFC functionality is achieved, but the terminal weight increases
Solution Approach 1:
The patent removes the FPC component, which adds weight to the terminal. By using only the ferrite material integrated into the housing, the overall weight of the terminal is reduced while maintaining NFC functionality.
4Length of stationary object
If metal antenna radiator is used instead of ferrite-FPC combination, then the terminal thickness is reduced and manufacturing is simplified, but redesign of housing is required
Solution Approach 1:
The patent merges the metal antenna radiator with the existing housing structure, integrating the antenna function into the housing design. This approach reduces terminal thickness while minimizing the need for extensive housing redesign by utilizing the housing's existing structure.
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 solution enhances the magnetic flux of the NFC antenna, prolongs its service life, and facilitates a more aesthetic design while reducing the terminal's overall thickness and cost, enabling more efficient and cost-effective NFC functionality in mobile devices.
Implementation Method 1
a metal antenna radiator arranged between a metal housing and a surrounding frame... having a first end coupled with a feed source through a matching circuit and a second end grounded
Data Source
AI summary
A terminal includes: a metal housing; a frame surrounds the metal housing; and a metal antenna radiator arranged between the metal housing and the frame, surrounding the metal housing, and having a first end coupled with a feed source through a matching circuit and a second end grounded.