Chip Card Metal Layer Booster Antenna Eddy Current Reduction
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Solution Overview
Problem
Metal contactless chip cards face performance issues due to power loss from additional coupling required by coil-on-module technology, which affects their efficiency and compliance with security standards.
Innovation Solution
A chip card design featuring a metal layer with a booster antenna structure and a slot that enhances electromagnetic coupling, utilizing a dual boost antenna system to minimize power loss and maintain high performance while adhering to EMVCo security standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If coil-on-module technology is used for contactless data interchange, then contactless functionality is achieved, but power loss increases due to additional coupling requirements
Solution Approach 1:
The patent combines the booster antenna structure directly with the metal layer of the card body, integrating two previously separate components into a unified structure. This merging eliminates the need for additional coupling elements while maintaining both contactless functionality and energy efficiency
Solution Approach 2:
The metal layer serves multiple functions: it provides structural integrity for the card body, acts as the booster antenna for contactless communication, and functions as a shielding layer. This multi-functionality eliminates the need for separate components that would otherwise be required, reducing power loss while maintaining adaptability
2Reliability
If a booster antenna structure is added to improve contactless performance, then antenna coupling is enhanced, but device complexity increases
Solution Approach 1:
The booster antenna is merged with the metal layer, creating a dual-function component that provides both structural support and electromagnetic coupling. This integration reduces the number of separate parts while enhancing antenna performance
Solution Approach 2:
The metal layer is designed to serve as both the card body structure and the booster antenna, eliminating the need for a separate antenna component. This multi-functional design reduces device complexity while improving coupling performance
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 chip card achieves high performance and compliance with security standards by optimizing antenna tuning and leveraging the metal layer to boost antenna performance, reducing eddy currents and maintaining resonant frequency within the desired range.
Implementation Method 1
a booster antenna structure, arranged in the opening, having an antenna section for electromagnetically coupling to the metal layer
Implementation Method 2
having a coupling region for electromagnetically coupling to an antenna structure of a chip module
Implementation Method 3
reducing eddy currents and maintaining resonant frequency within the desired range
Data Source
AI summary
A chip card is provided. The chip card can have a metal layer in which an opening is formed and a slot that extends from one edge of the opening to the outer edge of the metal layer, a booster antenna structure, arranged in the opening, having an antenna section for electromagnetically coupling to the metal layer and having a coupling region for electromagnetically coupling to an antenna structure of a chip module, and the chip module, which is arranged in the coupling region, having the antenna structure arranged on the chip module.