Selectable NFC Chip Switching on a Single Antenna PCB
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Solution Overview
Problem
NFC technology faces risks such as eavesdropping, relay attacks, cloning, and requires external power sources, and existing NFC chips use a single antenna without flexibility and are prone to failure.
Innovation Solution
A securely linked NFC device with a deformable selector that passively activates NFC chips using a single antenna, allowing multiple NFC chips to be selectively coupled and decoupled based on user input, eliminating the need for internal power sources and reducing failure risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple NFC chips are used to support various NFC frequencies, then the versatility and functionality of the device is improved, but the device complexity and failure risk increase
Solution Approach 1:
The patent implements a single NFC antenna that can be selectively coupled to multiple NFC chips through deformable selectors. This allows one antenna to serve multiple functions by connecting to different NFC chips based on user selection, thereby achieving versatility without proportionally increasing complexity. The antenna becomes a universal interface that can work with any inserted NFC chip.
Solution Approach 2:
The patent introduces deformable selectors that can change their electrical connection state dynamically. When a deformable selector is engaged, it establishes an electrical connection between the antenna and a specific NFC chip; when disengaged, it breaks the connection. This dynamic switching capability allows the system to adapt its configuration based on which NFC chip should be active, resolving the contradiction between supporting multiple frequencies and maintaining simple architecture.
2Ease of operation
If NFC chips are kept in an 'always ready' or 'active' state, then the ease of operation is improved, but the energy consumption increases
Solution Approach 1:
Instead of maintaining continuous active state, the patent implements periodic activation through deformable selectors. The NFC chip remains inactive until the user physically engages the deformable selector, which then activates the connection between the antenna and the selected NFC chip. This on-demand activation dramatically reduces power consumption while maintaining ease of operation, as the activation action is simple and intuitive.
Solution Approach 2:
The deformable selector mechanism allows the user to directly control the activation state of the NFC chip. When the user needs NFC functionality, they engage the deformable selector, which automatically establishes the electrical connection and activates the NFC chip. This self-service approach eliminates the need for complex power management circuits while achieving both ease of operation and energy efficiency.
3Device complexity
If a single antenna is used for NFC operations, then the device complexity is reduced, but the ability to support multiple NFC frequencies simultaneously is limited
Solution Approach 1:
The patent uses deformable selectors to dynamically reconfigure the antenna connection. A single antenna can be electrically connected to different NFC chips based on which deformable selector is engaged. This dynamic switching allows the single antenna to support multiple NFC frequencies sequentially, resolving the contradiction between simplicity and versatility.
Solution Approach 2:
The patent segments the connection between the antenna and multiple NFC chips through separate deformable selectors. Each deformable selector controls the connection to a specific NFC chip, allowing independent selection and activation. This segmentation enables a single antenna to work with multiple chips without requiring simultaneous connections, achieving multi-frequency support while maintaining simple antenna architecture.
4Ease of operation
If NFC chips have interlocking or moving parts, then the ease of operation is improved, but the reliability decreases
Solution Approach 1:
The patent uses deformable selectors that create temporary electrical connections without requiring permanent mechanical interlocking parts in the NFC chips themselves. The selection mechanism is external to the chips, allowing the chips to remain simple, static components. This approach maintains reliability by eliminating moving parts from the chips while preserving ease of operation through the deformable selector interface.
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 solution provides secure, power-efficient operation of multiple NFC frequencies, enhancing security and reliability by ensuring only active NFC chips are engaged, thus reducing interference and failure risks.
Implementation Method 1
The deformable selector may be conductive and may close a circuit. The engaged configuration may aid in establishing electrical continuity between the single NFC antenna and the respective single NFC chip therein.
Implementation Method 2
The NFC chip may be powered passively. Each of the respective single deformable selectors may be mechanically deformable between an engaged configuration and a disengaged configuration. The engaged configuration may aid in establishing electrical continuity between the single NFC antenna and the respective single NFC chip therein.
Data Source
AI summary
Descripted herein may be a securely linked NFC device which may include a printed circuit board which may have a single NFC antenna and a plurality of individually selectable NFC chips designed for end user needs. Each NFC chip may be selected by use of a mechanical switch which may use non-metallic contacts that temporarily activates a single NFC chip at a time while leaving all other NFC chips deactivated. Said activation may occur by selectively closing a circuit on Printed Computer Board and using a variable circuit trace geometry to select electrically conductive paths which maintain impedance balance. This securely linked NFC device may enhance security of NFC uses because all NFC chips remain in a deactivated state until selected via mechanical selector from the end user.