Multilayer RFID Tag Component for Orientation-Independent Radiation Gain
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Solution Overview
Problem
The challenge of polarization mismatch between RFID reader antennas and tags, particularly when attached to symmetrical structures or cylindrical items, leads to inconsistent radiation gain patterns and reduced identification performance, especially in dynamic environments where objects are randomly placed and oriented.
Innovation Solution
An RFID tag component design featuring a substrate with a ground plane, through holes, and multiple layers to maintain uniform radiation gain across different orientations and materials, including a chip placement that allows for fine-tuning of center frequency and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the RFID tag is attached to symmetrical structures or cylindrical items, then the tag can be used on various objects, but the arrangement position and direction cannot be directly confirmed from the outside
Solution Approach 1:
The patent applies visual indication through color-coded markers or contrasting patterns on the RFID tag component to enable easy identification of the correct insertion direction and position. This allows users to quickly determine the proper orientation when attaching the tag to symmetrical or cylindrical objects without requiring complex alignment procedures.
2Adaptability or versatility
If the RFID tag is used in dynamic environments with randomly placed objects, then the coverage is expanded, but the polarization mismatch between reader antenna and tag increases
Solution Approach 1:
The patent introduces asymmetric polarization characteristics into the RFID tag design, such as asymmetric antenna structures or polarization-variant materials, that allow the tag to maintain consistent polarization properties regardless of its orientation relative to the reader antenna. This asymmetric design compensates for the random positioning of objects in dynamic environments and reduces polarization mismatch.
Solution Approach 2:
The patent employs materials or structures with variable electromagnetic parameters that can adapt their polarization characteristics based on the operating conditions. This allows the RFID tag to maintain optimal polarization alignment with the reader antenna even when the tag's physical orientation varies due to random object placement.
3Area of stationary object
If the distance between the tag and reader is not approximately the same for all objects, then the identification range is increased, but the sensing distance of the tag is limited
Solution Approach 1:
The patent designs the RFID tag with dynamic electromagnetic characteristics, such as tunable resonance frequencies or adjustable polarization properties, that can adapt to different distances from the reader. This allows the tag to optimize its sensing performance across varying distances, extending both the minimum and maximum sensing ranges to accommodate diverse spatial configurations.
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 design ensures consistent radiation gain and improved identification performance regardless of the orientation or material of the attached object, enhancing readability and usability in diverse environments.
Implementation Method 1
the RFID tag component itself to have a ground plane to minimize the deviation/offset between the forward radiation gain and the backward radiation gain
Data Source
AI summary
An RFID tag component and a tool attached with the RFID tag component are disclosed, including: a substrate; a bottom layer and a middle layer which located between a top and the bottom of the substrate, one end of the middle layer electrically connected to the one end of the bottom layer through the first through hole, other end of the middle layer extending toward the other end of the RFID tag component; a top layer which located on the top of the substrate, other end of the top layer electrically connected to the other end of the bottom layer through the second through hole, one end of the top layer spaced apart from the first through hole, the top layer including a gap; a chip bonded to the top layer across the gap of the top layer.