Wireless IC Device Using Article as Radiator
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Solution Overview
Problem
Current RFID systems face challenges in reducing production costs, enabling attachment to small articles, and minimizing the thickness of the tag formation portion, as they require separate antenna formation processes and larger antenna sizes for sufficient radiation characteristics.
Innovation Solution
A wireless IC device incorporating an electromagnetic coupling module with a wireless IC chip and a power supply circuit substrate, where the radiation electrode is integrated into the article itself, allowing for impedance matching and reduced protrusion, enabling efficient radiation characteristics even on small articles without additional antenna patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antenna formation processes are used, then radiation characteristics are achieved, but production costs increase and manufacturing complexity increases
Solution Approach 1:
The patent combines the antenna function with the existing article structure by utilizing the article's conductive portions (such as metal lids, foils, or containers) as radiation electrodes. This eliminates the need for separate antenna formation processes while maintaining sufficient radiation characteristics for RFID communication.
Solution Approach 2:
The article's existing conductive components serve dual purposes: their original function (e.g., container, lid, or structural element) and as radiation electrodes for RFID communication. This multi-functionality reduces the need for additional components and simplifies manufacturing.
2Reliability
If antenna patterns are formed separately, then radiation characteristics are achieved, but device complexity and additional members increase
Solution Approach 1:
The antenna function is merged with the article's existing conductive structure. The radiation electrode is formed by utilizing portions of the article itself (such as metal lids, foils, or containers) rather than adding separate antenna patterns, thereby reducing device complexity and eliminating additional formation processes.
3Reliability
If larger antenna patterns are used for sufficient radiation characteristics, then radiation performance is improved, but the tag cannot be attached to small articles
Solution Approach 1:
The patent utilizes localized conductive portions of the article (such as metal lids, foils, or specific container sections) as radiation electrodes. This approach allows sufficient radiation characteristics to be achieved using only the available conductive area on small articles, without requiring the entire article surface or larger dimensions.
4Strength
If tag is disposed on base material with additional films covering it, then protection and structure are provided, but thickness of tag formation portion increases
Solution Approach 1:
The radiation electrode is merged with the article's existing structure (such as metal lids, foils, or containers). This integration eliminates the need for additional thick films or layers to provide structural support, thereby reducing the overall thickness of the tag formation portion while maintaining structural integrity.
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
This configuration reduces production costs, allows for attachment to small articles, and maintains sufficient radiation characteristics while minimizing the device's thickness and protrusion, offering flexibility in article shape and material usage.
Implementation Method 1
a power supply circuit substrate that is electrically connected or electromagnetically coupled to the wireless IC
Implementation Method 2
a radiation electrode which is defined by a portion of an article and operates as a radiator
Implementation Method 3
by using the electromagnetic coupling module, impedance matching between the wireless IC chip and the radiation electrode may be designed within the power supply circuit substrate
Data Source
AI summary
A wireless IC device includes a cutout portion having no aluminum-deposited film that is provided at an end of an article package made of an aluminum-deposited laminated film, and an electromagnetic coupling module is provided at the cutout portion. The electromagnetic coupling module and the aluminum-deposited film of the package define a wireless IC device. A loop electrode, which is a magnetic field transmission auxiliary radiator of the electromagnetic coupling module, is coupled to the aluminum-deposited film of the package. Thus, the article package functions as a radiator of an antenna.