NFC Antenna Layout With Functional Conductor for Metal Camera Modules
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Solution Overview
Problem
NFC antennas in electronic devices can be shielded by metal decorative members of camera modules, creating communication blind spots and affecting user experience.
Innovation Solution
A ring-shaped functional conductor with a hollowed-out region surrounds an NFC antenna radiator, generating opposite electromagnetic fields and induced currents to reduce shielding effects, enhancing NFC communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a metal decorative member is used in the camera module, then the appearance quality is improved, but the NFC antenna is shielded causing communication blind spots
Solution Approach 1:
A functional conductor is introduced as an intermediary component between the metal decorative member and the NFC antenna. This functional conductor generates an electromagnetic field that counteracts the shielding effect of the metal, serving as a mediator to eliminate the harmful interaction while preserving both the appearance quality of the metal decoration and the reliability of NFC communication
Solution Approach 2:
The functional conductor is designed to generate an electromagnetic field in advance that opposes and neutralizes the shielding effect before it can completely block the NFC signal. By positioning the functional conductor adjacent to the metal decorative member and configuring it to produce counteracting electromagnetic fields, the shielding effect is preemptively canceled, preventing communication blind spots
2Adaptability or versatility
If multiple camera modules are configured, then the photography function is enhanced, but the NFC communication blind spots increase
Solution Approach 1:
The solution divides the shielding counteraction into separate segments, with each camera module having its own functional conductor. This segmentation allows each functional conductor to independently counteract the shielding effect of its corresponding metal decorative member, enabling multiple camera modules to coexist without creating overlapping NFC communication blind spots
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 design minimizes communication blind spots and improves NFC performance by canceling out induced currents, ensuring reliable communication even with multiple-camera configurations.
Implementation Method 1
The NFC antenna radiator may be configured to be electrically connected to a radio frequency (RF) signal source and to generate a first electromagnetic field and a second electromagnetic field in the hollowed-out region under an excitation of the RF signal source, for enabling the functional conductor to generate a first induced current and a second induced current
Data Source
AI summary
An electronic device and a communication system are provided. The electronic device includes a ring-shaped functional conductor and a near field communication (NFC) antenna radiator. A hollowed-out region is surrounded by the functional conductor. The NFC antenna radiator is configured to transmit and receive a NFC signal at least toward a side where the functional conductor is located. An orthographic projection of the NFC antenna radiator on a plane where the functional conductor is located, is at least partially located within the hollowed-out region. The NFC antenna radiator is configured to be electrically connected to a radio frequency (RF) signal source and to generate a first electromagnetic field and a second electromagnetic field in opposite directions in the hollowed-out region under an excitation of the RF signal source, for enabling the functional conductor to generate a first induced current and a second induced current in opposite directions.