RFID Container Antenna Layout for Metal Surface Communication
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Solution Overview
Problem
Existing containers with integrated RFID modules face challenges in designability and manufacturing efficiency, particularly when metal surfaces are present, as they interfere with RFID communication.
Innovation Solution
A container design that incorporates an insulating base with an antenna pattern formed by a first and second antenna film, electrically connected to an RFID module's electrodes, allowing for efficient data communication while maintaining design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an RFID tag is attached to the outer surface of a container with metal coating, then wireless communication capability is achieved, but the metal surface interferes with RFID communication
Solution Approach 1:
The patent introduces an insulating base material as an intermediary layer between the metal-coated container surface and the RFID antenna pattern. This insulating layer prevents direct electrical contact between the metal surface and antenna, eliminating interference while maintaining communication capability. The insulating base acts as a mediator that allows the RFID system to function on metal surfaces without direct contact.
2Reliability
If an RFID tag with integrated RFIC chip and antenna pattern is attached to the container, then wireless communication is enabled, but design flexibility is reduced due to attachment space requirements
Solution Approach 1:
The patent divides the RFID system into separate functional components: the insulating base material and the RFID antenna pattern are formed as distinct elements that can be independently designed and positioned. This segmentation allows the antenna pattern to be integrated into the container design without requiring separate attachment spaces, as the insulating base can be incorporated into the container structure itself.
Solution Approach 2:
The patent merges the insulating base material with the container structure, eliminating the need for separate RFID tag attachment. The antenna pattern is directly formed on the insulating base that is already part of the container, combining the container and RFID functions into a unified structure that maintains design flexibility.
3Illumination intensity
If a metal layer is printed on the package main body to assign metallic luster, then aesthetic appearance is improved, but RFID tag attachment space must be reserved without metal layer
Solution Approach 1:
The insulating base material serves multiple functions: it provides the necessary electrical insulation for RFID operation, maintains the metallic luster appearance through its surface properties, and allows continuous pattern printing across the entire surface including RFID areas. This multi-functional design eliminates the need to reserve separate spaces without metal layer.
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 enhances designability and manufacturing efficiency by allowing the RFID module to be integrated without reducing the container's design flexibility, and ensures reliable communication even in the presence of metal surfaces.
Implementation Method 1
a filter circuit that transmits a current due to an electromagnetic wave at a natural resonance frequency being a communication frequency to the RFIC element
Implementation Method 2
an antenna pattern including a first antenna film and a second antenna film on a first main surface of the base material
Data Source
AI summary
A container including an RFID module is provided that includes a base, and an antenna pattern. The antenna pattern includes a first antenna film and a second antenna film on a first main surface of the base. The RFID module includes an RFIC element, a filter circuit, and first and second electrodes. The filter circuit is configured to transmit a current due to an electromagnetic wave at a natural resonance frequency to the RFIC element. The first and second electrodes are connected to the filter circuit. The first electrode of the RFID module and the first antenna film are electrically connected to each other. The second electrode of the RFID module and the second antenna film are electrically connected to each other. Moreover, a sheet resistance of each of the first antenna film and the second antenna film is 0.5Ω/sq or more.