Antenna Module Vertical Stacking for NFC MST Interference Reduction
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Solution Overview
Problem
Current payment methods using smartphones at POS terminals face challenges due to the lack of standardized NFC performance and the need for separate reading apparatuses, which complicates the application of 2D barcode and NFC payment methods.
Innovation Solution
An antenna module with a wiring part and magnetic parts on opposite surfaces of a substrate, where the first magnetic part faces the first antenna wiring and the second magnetic part faces the second antenna wiring, allowing for efficient communication without additional reading apparatuses, and enabling both NFC and MST functions on a single portable terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both NFC antenna and MST antenna are mounted on one portable terminal, then communication functions are enhanced, but antenna interference and space utilization become problematic
Solution Approach 1:
The patent utilizes the third dimension (vertical stacking) to arrange antennas. The NFC antenna and MST antenna are positioned at different heights above the substrate, with the NFC antenna having a larger area and the MST antenna being smaller and positioned above it. This vertical arrangement resolves the contradiction by enabling both communication functions while minimizing interference and optimizing space utilization.
2Adaptability or versatility
If MST antenna is added to support contactless payment, then payment capability is improved, but interference with existing NFC antenna performance occurs
Solution Approach 1:
The MST antenna is positioned in the vertical dimension above the NFC antenna substrate. This spatial separation in the vertical direction reduces electromagnetic interference between the two antenna types while maintaining both payment capabilities. The NFC antenna operates at a lower height with larger area, while the MST antenna operates at a higher position with smaller area.
Solution Approach 2:
The patent applies different design characteristics to different regions: the NFC antenna uses a larger area and different winding configuration optimized for NFC frequencies, while the MST antenna uses a smaller area and different winding configuration optimized for MST frequencies. This local optimization ensures each antenna maintains its performance characteristics despite coexistence.
3Reliability
If antenna area is increased to improve communication performance, then signal strength is improved, but space occupied in the portable terminal increases
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked arrangement. The NFC antenna occupies a larger area at a lower height, while the MST antenna occupies a smaller area at a higher position. This vertical stacking enables the system to achieve good communication performance for both antenna types while minimizing the total footprint area on the substrate.
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 antenna module maintains communications performance, reduces interference between antennas, and allows for seamless payment operations without additional hardware, enhancing the reliability and efficiency of NFC and MST transactions.
Implementation Method 1
a magnetic part including a first magnetic part disposed on one surface of the wiring part and a second magnetic part disposed on another surface of the wiring part
Implementation Method 2
the first magnetic part is disposed on one surface of the wiring part to face a portion of the first antenna wiring
Implementation Method 3
a first antenna wiring disposed on a substrate... the first magnetic part is disposed on one surface of the wiring part to face a portion of the first antenna wiring
Data Source
AI summary
An antenna module includes a wiring part including a first antenna wiring and a second antenna wiring disposed on a substrate; and a magnetic part including a first magnetic part disposed on one surface of the wiring part and a second magnetic part disposed on the other surface of the wiring part, wherein the first magnetic part is disposed on one surface of the wiring part so as to face a portion of the first antenna wiring and a portion or the entirety of the second antenna wiring, and the second magnetic part is disposed on the other surface of the wiring part so as to face the other portion of the first antenna wiring.