Flexible NFC Antenna Module for Two-Way Wireless Transmission
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Solution Overview
Problem
Near field communication (NFC) antennas integrated into electronic devices are often affected by metal casings, leading to reduced recognition rates and potential failure, limiting antenna placement and restricting wireless transmission to one direction.
Innovation Solution
A near field communication module using a flexible circuit board with two sensing antennas placed on opposite surfaces of an electronic device's housing, allowing magnetic fields to emit in opposite directions for two-way wireless transmission and data exchange, and optionally including a third antenna for three-way communication, with a ferrite or electromagnetic shielding sheet to prevent interference from metal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the near field communication antenna is integrated into the electronic device, then the wireless transmission function is achieved, but the high frequency harmonics are affected by metal casing or other metal components, reducing the recognition rate or causing antenna failure
Solution Approach 1:
The patent introduces a flexible circuit board as an intermediary carrier to hold and position the NFC antenna. This flexible circuit board acts as a mediator between the antenna and the metal housing, providing electrical connection while maintaining spatial separation from interfering metal components. The flexible nature allows precise positioning to avoid metal interference zones.
Solution Approach 2:
The patent transitions from planar antenna placement to three-dimensional spatial arrangement by bending the flexible circuit board. This allows the antenna to be positioned on the side surface of the electronic device rather than being constrained to flat surfaces, creating additional spatial dimensions for optimal positioning away from interfering metal components.
2Adaptability or versatility
If the near field communication antenna is disposed at one surface of the electronic product, then the antenna structure is simple, but only one way wireless transmission and data exchange can be provided
Solution Approach 1:
The patent uses a flexible circuit board that can be bent to create a three-dimensional antenna structure. By bending the circuit board, the antenna is positioned on the side surface of the device with its plane perpendicular to the front and back surfaces, enabling magnetic field lines to extend in multiple directions (front, back, and lateral) rather than being constrained to a single surface plane.
Solution Approach 2:
The flexible circuit board provides a dynamic, adaptable structure that can be configured in different bending states to optimize antenna positioning. This dynamic flexibility allows the same antenna structure to achieve multi-directional transmission capability without requiring multiple separate antenna elements, thus improving versatility while controlling complexity.
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 reliable two-way or three-way wireless transmission and data exchange, improving convenience and reducing electromagnetic interference, thereby enhancing the functionality of NFC-enabled electronic devices.
Implementation Method 1
magnetic lines generated by the first sensing antenna and the second sensing antenna emit towards two opposite directions, respectively. In other words, under the configuration, the two-way wireless transmission and data exchange can be achieved according to the magnetic field induction principle
Data Source
AI summary
A near field communication module applied to an electronic device is provided. The near field communication module includes a flexible circuit board, a first sensing antenna and a second sensing antenna. The flexible circuit board includes a first part and a second part connected with each other. The first sensing antenna is disposed at the first part. The second sensing antenna is disposed at the second part. The first sensing antenna is connected to the second sensing antenna. After the flexible circuit board is bended, it is disposed at a side of the electronic device.