Smart label and system made up of a smart label and a shielding element
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Solution Overview
Problem
Existing RFID-assisted smart labels for microwave dishes are prone to damage or destruction due to microwave radiation and sparking during use, compromising communication reliability.
Innovation Solution
A smart label design featuring a metal shield made of overlapping foil sections with a shared recess enclosed by the antenna, ensuring minimal gap for communication while preventing microwave penetration and sparking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the foil sections are spaced apart to allow communication, then RFID communication is enabled, but the shielding effectiveness against microwave radiation is reduced
Solution Approach 1:
The patent uses thin foil sections that are flexible and can be arranged in spaced configurations. These thin films maintain electromagnetic shielding effectiveness for microwave frequencies while the spacing between them allows RFID communication at lower frequencies to pass through, achieving both protection and communication functionality.
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 effectively shields the RFID chip and antenna from microwave damage, maintaining reliable communication and preventing sparking, even in a microwave oven environment.
Implementation Method 1
a flat metal shield, the RFID chip being combined with the antenna to form an inlay that is applied to the metal shield made of multiple foil sections
Implementation Method 2
An RFID inlay comprising an RFID chip and an antenna couples in energy for readout; the energy is provided by the reading device, here as well a smart phone, for example, in an electrical field
Data Source
AI summary
For improved durability during use in a microwave oven, and at the same time, good readability of a smart label, it is provided that a flat RFID inlay made up of an RFID chip and an antenna is applied to a metal shield that is made up of at least two mutually overlapping foil sections. A recess in the foil sections is enclosed by the antenna of the RFID inlay. When such a smart label with the metal shield is applied in advance to a microwave dish, and a shielding element that is impermeable to microwave radiation in the microwave oven is temporarily overlaid on the smart label from the opposite side, such a smart label can be used in the microwave oven without damage, but remains readable outside the microwave oven, and without the shielding element.