Folded NFC Antenna for Wide-Angle Orientation
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Solution Overview
Problem
Existing NFC mobile devices require precise alignment to establish a link, limiting their ergonomic use due to the placement of NFC antennas, which restricts the orientation flexibility and usability.
Innovation Solution
A flexible polymer printed circuit substrate antenna is designed to be folded and wrapped around the mobile device case, allowing NFC links to be established regardless of device orientation, with the antenna-bearing end pointed towards the other NFC device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the NFC antenna is placed on the battery back door in a fixed position, then the device structure is simple and easy to manufacture, but the device requires precise alignment to establish NFC link, limiting ergonomic use and orientation flexibility
Solution Approach 1:
The antenna is divided into multiple segments or sections that can be independently positioned on different surfaces of the device case. This segmentation allows the antenna to maintain effective NFC communication across various orientations by having multiple potential contact points with another NFC device, resolving the contradiction between operational flexibility and structural simplicity.
Solution Approach 2:
The antenna configuration transitions from a single-plane placement to a three-dimensional arrangement wrapping around the device case. By extending the antenna across multiple surfaces and dimensions of the device, it can establish NFC links regardless of the device's orientation, thus improving ease of operation while accepting increased structural complexity.
2Reliability
If the NFC antenna requires perfect alignment to establish a link, then the electromagnetic coupling between Tx and Rx coils is maximized, but the user must hold the mobile phone against the NFC capable device in a perfectly aligned way, reducing usability
Solution Approach 1:
Different sections of the antenna are positioned to provide localized electromagnetic coupling zones across various surfaces of the device. This allows the NFC link to be reliably established from multiple orientations and contact points, maintaining reliability while eliminating the need for perfect alignment.
Solution Approach 2:
The antenna system provides dynamic adaptability to different orientations and positions of the NFC device. By having multiple antenna segments positioned on different surfaces, the system can dynamically establish effective electromagnetic coupling regardless of how the user holds the device, thus maintaining reliable connection without strict alignment requirements.
3Adaptability or versatility
If the antenna is folded and wrapped around the mobile device case, then NFC communication works across wide orientations, but the antenna structure becomes more complex and may interfere with other device components
Solution Approach 1:
The antenna is segmented into multiple sections that can be independently routed to different surfaces of the device case. This segmentation enables the antenna to wrap around the device for multi-orientation support while keeping each individual segment relatively simple in structure, thus improving adaptability without excessive complexity.
Solution Approach 2:
The antenna structure is integrated within or alongside other device components, nesting the antenna pathways within the device's existing structural elements. This nesting approach allows the antenna to wrap around the device case for versatile orientation support while minimizing additional structural complexity and avoiding interference with other components.
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 communication across a wide range of orientations, including up to 90 degrees of misalignment, enhancing user convenience and usability without interfering with other device components.
Implementation Method 1
hold the mobile phone against the NFC capable device and in a perfectly aligned way such that the Tx and the Rx coils electromagnetically couple
Data Source
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AI summary
Devices and methods are disclosed for providing an improved antenna for NFC mobile devices. Embodiments of the disclosure provide an antenna configuration that makes it possible to establish an NFC link when an NFC mobile device is oriented in ergonomic positions that are desirable for a user. In various embodiments, the NFC antenna is folded and wrapped around a portion of the case of a mobile wireless device. Using the NFC antenna disclosed herein, an NFC link can be established regardless of the orientation of the NFC wireless mobile device and another NFC device, as long as the antenna-bearing end of the wireless mobile device is pointed toward the antenna of the other NFC device.