RFID Label Antenna Layout Across a Tear-Off Line
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Solution Overview
Problem
RFID labels and tags with tear-off lines intersecting with antenna patterns risk cutting off the antenna, leading to reduced communication range and performance due to the need to avoid intersecting the tear-off line with the antenna pattern, which restricts antenna size and arrangement.
Innovation Solution
Designing an RFID label and tag with a dipole antenna that allows the tear-off line to cut through the substrate and antenna, extending along the antenna length direction, ensuring the antenna is not completely cut off, and maintaining its performance even when the tear-off line intersects with the antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tear off line is arranged to avoid intersecting with the antenna pattern, then the antenna performance is maintained, but the antenna size and arrangement are restricted
Solution Approach 1:
The invention converts the harmful effect of the tear-off line cutting through the antenna into a beneficial design feature by intentionally positioning the tear-off line to pass through a wide portion of the dipole antenna. This allows the antenna to be divided into two functional parts that remain electrically connected through the IC chip, transforming what would normally be a disruptive element into an acceptable design configuration that enables both tear-off functionality and maintained antenna performance
Solution Approach 2:
The invention applies different design considerations to different parts of the antenna structure. The dipole antenna is designed with a wide portion specifically positioned to accommodate the tear-off line, while the narrow portions maintain electrical connection through the IC chip. This localized differentiation allows the tear-off function to be implemented without compromising overall antenna performance, as only specific portions are affected while critical functional areas remain intact
2Length of moving object
If the antenna pattern is made larger to extend communication range, then the communication range is improved, but the antenna becomes more likely to be cut off by the tear off line
Solution Approach 1:
The invention segments the dipole antenna into multiple portions, with the tear-off line passing through a designated wide portion while the narrow portions on either side remain intact and electrically connected through the IC chip. This segmentation allows the antenna to achieve a larger overall size for extended communication range while ensuring critical connection points are protected from being cut off during the tear-off process
Solution Approach 2:
The antenna structure incorporates a wide portion specifically designed to accommodate the tear-off line, differentiating it from the narrow portions that maintain electrical continuity. This local quality variation allows the antenna to be larger overall while protecting critical functional areas from being cut off, as the wide portion is intentionally designed to be interrupted by the tear-off line without compromising overall antenna functionality
3Adaptability or versatility
If the tear off line cuts through the antenna pattern, then the antenna is likely to be completely cut off causing electrical disconnection, but avoiding the intersection restricts antenna design options
Solution Approach 1:
The invention applies different structural characteristics to different portions of the antenna, with a wide portion designed to accommodate the tear-off line and narrow portions designed to maintain electrical connection. This local differentiation allows the tear-off line to cut through the antenna structure without causing complete electrical disconnection, as the narrow portions and IC chip ensure continuity while the wide portion is intentionally designed to be interrupted
Solution Approach 2:
The IC chip serves as an intermediary that maintains electrical connection between the two sides of the dipole antenna after the tear-off line cuts through the wide portion. This intermediary component ensures that even though the antenna pattern is physically interrupted, the electrical circuit remains complete, allowing the antenna to function properly despite the tear-off line passing through it
Data Source
AI summary
An RFID label includes: a substrate; a dipole antenna formed of a metal foil so as to have a predetermined antenna length and a predetermined antenna width, the dipole antenna being arranged on a surface of the substrate; an IC chip connected to the dipole antenna; and a separator temporarily adhered to an adhesive agent overlaid on the surface of the substrate on which the dipole antenna is arranged, wherein a tear off line cuts through the substrate and the dipole antenna, in at least a part of the dipole antenna, so as to extend along an antenna length direction and so as to be superimposed with the part of the dipole antenna.