Variable Position Strap Mounting for RFID Transponders
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Solution Overview
Problem
RFID transponders face challenges in achieving optimal performance due to sub-optimal coupling of electronics to antennas, which affects their size, flexibility, and adaptability to varying operating environments, particularly when mounted on objects with metallic or moisture-rich surfaces.
Innovation Solution
A method involving iterative positioning and testing of RFID chips and antennas until a test criterion is met, allowing for dynamic configuration and optimal coupling, which can include using a pressure-sensitive adhesive for capacitive coupling and varying the position of straps relative to antennas to adjust electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RFID transponders use fixed-position strap mounting, then manufacturing is simpler, but performance optimization is limited due to inability to adapt to varying operating environments
Solution Approach 1:
The patent applies the dynamics principle by providing straps with multiple attachment positions that allow the transponder configuration to be adjusted after manufacturing. This enables the system to adapt to different operating environments (metallic vs. non-metallic surfaces) by repositioning the strap to optimize coupling between the electronics and antenna, resolving the contradiction between adaptability and manufacturing simplicity.
2Reliability
If RFID transponders use optimized antenna-electronics coupling, then performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies segmentation by separating the optimization function from the manufacturing process. The strap is divided into multiple segments with distinct attachment positions, allowing optimal coupling to be achieved through selection of appropriate positions rather than through precise chip placement during manufacturing. This resolves the contradiction by enabling performance optimization without increasing manufacturing precision requirements.
3Volume of moving object
If RFID transponders use smaller form factor components, then device size is reduced, but coupling effectiveness between electronics and antennas decreases
Solution Approach 1:
The patent applies the dimensionality change principle by moving the optimization parameter from the spatial dimension (component size) to the positional dimension (strap attachment location). Smaller electronics can be used to reduce form factor, while coupling effectiveness is maintained or optimized by adjusting the strap's attachment position relative to the antenna, thereby resolving the contradiction between size reduction and coupling effectiveness.
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
This approach enables the production of RFID transponders that can be dynamically tuned for improved performance in diverse environments, ensuring reliable operation and efficient manufacturing by optimizing electrical connections and adapting to environmental conditions.
Implementation Method 1
using a pressure-sensitive adhesive for capacitive coupling
Data Source
AI summary
A method of coupling an RFID chip to an antenna includes the steps of, iteratively until a test criterion is met, positioning an RFID chip relative to an antenna and testing the RFID chip and antenna. Once the test criterion is met, the RFID chip is coupled with the antenna. A method of coupling an RFID chip to one of a plurality of various antennas is also provided. A method of coupling an RFID chip to an antenna on an object is also provided.