RFID Wristband Conductive Element Readability
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Solution Overview
Problem
Wristbands with RFID inlays face readability issues due to interference from the body of the wearer, especially when the wrist is positioned between the RFID inlay and the reader.
Innovation Solution
Incorporating one or more conductive elements into the wristband that extend circumferentially around the wristband when wrapped, these elements can improve the read range and read angle of the RFID circuit, overcoming radiofrequency interference from the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wristband is wrapped around the body, then the RFID circuit should be readable, but the body interferes with the radiofrequency signals reducing readability
Solution Approach 1:
A conductive element is introduced as an intermediary between the RFID circuit and the body. This conductive element acts as a shield or mediator that manages the interaction between the RFID signals and the body, reducing the harmful radiofrequency interference while allowing the RFID circuit to remain readable when the wristband is worn.
2Ease of operation
If the wrist is positioned between the RFID inlay and the reader, then the wristband can be worn comfortably, but the readability of the RFID circuit is significantly reduced
Solution Approach 1:
The conductive element serves as a mediator that allows the wristband to be worn comfortably with the wrist in natural positions while maintaining RFID readability. It manages the electromagnetic field interaction to prevent the wrist from blocking or interfering with the RFID signals between the inlay and the reader.
3Reliability
If conductive elements are added to improve RFID readability, then the read range and read angle increase, but the device complexity increases
Solution Approach 1:
The conductive element changes the electromagnetic parameters of the wristband system, specifically improving the read range and read angle of the RFID circuit. By modifying the electrical characteristics through the addition of the conductive element, the system achieves better RFID performance without requiring complex mechanical or structural changes.
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 conductive elements enhance the readability of the RFID circuit by increasing the power induced in the circuit, allowing for improved read ranges and angles, even when the wristband is wrapped around a body part.
Implementation Method 1
The conductive element can increase a power induced in the RFID circuit
Data Source
AI summary
A wristband has a flexible elongated body with an open state in which the wristband is capable of being positioned in a planar configuration and a closed state in which the wristband is wrapped in a loop. An RFID circuit is supported by the body and is positioned on the body such that the RFID circuit is configured to be included in the loop when the wristband is in the closed state. An elongated conductive element is supported by the body and is positioned on the body such that the elongated conductive element is configured to be included in the loop when the wristband is in the closed state. The elongated conductive element is spaced away from the RFID circuit and extends circumferentially about the loop in the closed state.