Folded Flexible PCB Antenna for Payment Terminals
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Solution Overview
Problem
The integration of contactless communication antennas in portable devices like smartphones and payment terminals is hindered by space constraints, high manufacturing costs, and interference issues, particularly due to the need for compact and efficient antenna placement around screens and within metal-shielded touchscreens.
Innovation Solution
A flexible printed circuit board with conductive tracks that can be folded to form antenna loops, allowing for efficient use of space and reduced material costs, with connections to form multi-turn antennas without the need for soldering, facilitating easy mounting and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contactless antenna is positioned around the screen of the payment terminal, then the antenna radiation efficiency is improved, but the manufacturing cost increases due to the need for a large flexible printed circuit board
Solution Approach 1:
The patent applies nesting by placing the flexible printed circuit board containing the antenna inside the housing of the payment terminal rather than around the screen. The antenna is nested within the terminal structure, specifically utilizing the housing space, which eliminates the need for a large external flexible circuit board while maintaining adequate radiation efficiency through proper positioning and design of the antenna loops within the terminal.
2Ease of operation
If a flexible printed circuit board is used to create the contactless antenna around the screen, then the mounting simplicity is improved, but the surface area requirement increases leading to higher costs
Solution Approach 1:
The patent transitions from a two-dimensional layout where the antenna must surround the screen perimetrically to a three-dimensional solution where the flexible printed circuit board is folded into loops and positioned within the terminal housing. This dimensional change allows the antenna to achieve the required loop structure in a compact volume rather than requiring extensive surface area around the screen.
3Volume of moving object
If the contactless antenna is integrated into the terminal housing, then the space utilization is improved, but the mounting complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-forming the flexible printed circuit board with the antenna trace pattern and folding structure before installation. The flexible circuit is manufactured with predetermined fold lines and loop configurations that simplify the mounting process - the antenna structure is prepared in advance and then simply inserted and fixed into the terminal housing, reducing on-site mounting complexity.
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 solution enables a cost-effective, compact, and interference-reduced contactless communications antenna that can be easily integrated into portable devices, improving reading efficiency and reducing manufacturing waste while maintaining antenna performance.
Implementation Method 1
The antenna is a device used to radiate electromagnetic waves (as a transmitter) or pick them up (as a receiver)
Data Source
AI summary
The disclosure relates to a flexible printed circuit board of longitudinal shape comprising at least one conductive track extending over the length of the flexible printed circuit, the flexible printed circuit board comprising at least one folding area shaped so as to allow said flexible printed circuit board to pass from an unfolded state to a folded state in which the conductive track forms at least one antenna loop.