Side-Wrapping NFC Antenna Layout for Dual-Side Card Detection
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Solution Overview
Problem
Current NFC antennas in handheld devices are typically configured on the backside or under the screen, leading to interference from screen components or batteries, limiting NFC card recognition to only one side of the device, making it inconvenient for certain usage scenarios.
Innovation Solution
An NFC antenna design for handheld devices featuring a coupling coil arranged along an edge, with a first antenna base on the backside and two extended second antenna bases on the sides, allowing NFC card swiping on both front and back sides without occupying front space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the NFC antenna is configured on the backside or under the screen, then the device structure is simple, but the NFC card can only be recognized on one side and interference from screen components or batteries occurs
Solution Approach 1:
The patent extends the NFC antenna from the traditional planar configuration on the backside to a three-dimensional structure that wraps around the side edges of the device. The antenna base extends along the side edges from the backside toward the frontside, enabling NFC card recognition on both the front and back sides without adding separate antenna modules, thus improving accessibility while maintaining structural simplicity.
Solution Approach 2:
The antenna base is divided into multiple segments: a first antenna base on the backside and at least a second antenna base extending along the side edges. This segmentation allows different portions of the antenna to serve different functions - the first antenna base for backside recognition and the second antenna base for frontside recognition, resolving the contradiction between operational accessibility and structural complexity.
2Area of stationary object
If the screen area is expanded without increasing overall device size, then the device is easier to hold, but no space is available to arrange NFC antennas on the front side
Solution Approach 1:
Instead of placing the NFC antenna on the front surface (two-dimensional plane), the patent utilizes the side edges and thickness dimension of the device. The antenna base extends along the side edges from the backside toward the frontside, effectively using the third dimension (depth/thickness) to achieve frontside NFC functionality without compromising screen area or overall device size.
Solution Approach 2:
The antenna structure is designed to be adaptable to different device sizes and screen configurations. By extending the antenna base along the side edges rather than fixing it to a specific front surface location, the design provides flexibility to accommodate various screen areas and device dimensions without requiring additional antenna modules.
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 NFC card swiping on both sides of the device without additional space usage, enhancing signal strength and reducing interference, while maintaining the original device layout and reducing manufacturing costs.
Implementation Method 1
a coupling coil; wherein, the coupling coil is arranged along an edge of the antenna base
Data Source
AI summary
The application discloses an NFC antenna for handheld devices and a handheld device. The NFC antenna includes an antenna base and a coupling coil arranged along the edge of the antenna base. The antenna base integrally includes a first antenna base and two second antenna bases. The first antenna base is arranged on a backside of the handheld device, with two sides bending and extending towards the frontside of the handheld device to form the second antenna bases. The second antenna bases are respectively located on sides of the handheld device and outside the screen assembly of the handheld device. The NFC antenna covers the sides of the handheld device, so that NFC antenna signals at the sides can be sensed at the frontside, thereby NFC cards can be swiped at both the frontside and backside of the handheld device, without occupying space at the frontside.