Non-contact IC Label with Magnetic Shielding for Metal Mounting
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Solution Overview
Problem
RFID tags experience reduced communication performance when attached to metal surfaces due to interference, and existing solutions struggle to maintain communication efficiency and thinness while adhering to metal substrates.
Innovation Solution
A non-contact IC label comprising a magnetic sheet with an IC chip and dual antenna sections connected via an impedance matching circuit, integrated with a gap retention member made of dielectric material, which enhances communication range and allows attachment to metal surfaces without compromising thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an RFID tag is attached on a metal surface, then the tag can be mounted on metal substrates, but communication performance is lowered due to interference
Solution Approach 1:
The patent introduces a magnetic sheet as an intermediary layer between the RFID tag antenna and the metal surface. This magnetic sheet serves as a mediator that shields the antenna from direct interference with the metal substrate, enabling both mounting on metal surfaces and maintaining communication performance. The magnetic sheet is positioned between the antenna and the metal substrate to prevent harmful interactions while allowing the tag to be attached to metal objects.
2Reliability
If a gap retention member is added to improve communication range, then communication performance improves, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into the gap retention member: it serves as both a physical spacer to maintain the optimal distance between the antenna and magnetic sheet (improving communication range), and as part of the overall tag structure that integrates with the magnetic sheet and antenna assembly. This merging approach adds the necessary communication improvement while minimizing structural complexity by using a single integrated component rather than multiple separate elements.
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 significantly improves communication range and enables reliable non-contact communication with data reading devices even when attached to metal surfaces, while maintaining a thin configuration and heat-resistant properties.
Implementation Method 1
a magnetic sheet (11), a gap retention member (13) formed from a dielectric body, a communication section (12) arranged on one face of the magnetic sheet (11)
Implementation Method 2
a gap retention member (13) formed from a dielectric body
Data Source
AI summary
A non-contact IC label includes a magnetic sheet, a gap retention member including a dielectric material, and a communication section provided between the magnetic sheet and the gap retention member. The communication section includes an IC chip and a first antenna section and a second antenna section which are connected to the IC chip. The magnetic sheet has a first magnetic face facing the gap retention member, and the IC chip, the first antenna section and the second antenna section are provided on the first magnetic face of the magnetic sheet.