RF Transponder Antenna Wire Breakpoint Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing radiofrequency transponder antennas using wire techniques, such as embroidery or sewing, face issues with excess wire thickness and tool pollution due to non-conductive fibers, which affect the antenna's radiofrequency characteristics and aesthetics, and require complex breakpoint management.
Innovation Solution
A method that stabilizes the antenna wire by creating breakpoints at the ends, eliminates excess thickness, and forms a cavity for precise module placement, using conductive pads connected via energy transfer to avoid tool soiling and ensure clean preparation of antenna ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wire technique (embroidery/sewing) is used to produce antenna, then high-speed production is achieved, but excess wire thickness and residual thread in air are created
Solution Approach 1:
The invention extracts and removes the problematic stopping points (excess wire thickness and residual threads) from the antenna structure through a dedicated elimination step, using cutting means to remove these defects while preserving the functional antenna wire
Solution Approach 2:
The invention performs preliminary stabilization of the wire end by creating a breakpoint before the elimination step, ensuring the wire is properly positioned and secured to the support before removing excess material, preventing damage during the elimination process
2Stability of the object's composition
If non-conductive fibers are used in antenna wire construction, then wire stability is improved, but welding tool pollution occurs
Solution Approach 1:
The invention extracts and removes the non-conductive fibers from the welding zone by orienting the welding operation to approach the contact pads from the side opposite the fiber-containing wire structure, preventing fiber contamination of the welding tool
Solution Approach 2:
The invention uses an intermediary approach by positioning the welding probe to contact the conductive pad through a path that does not intersect with the non-conductive fibers, effectively using the spatial arrangement as a mediator to prevent contamination
3Stability of the object's composition
If stopping points are created in wire embroidery, then wire fixation is achieved, but extra thickness and aesthetic defects are produced
Solution Approach 1:
The invention removes the visually problematic stopping points from the antenna surface through the elimination step, cutting away the excess wire and residual threads at the stopping points while maintaining the structural integrity of the antenna
Solution Approach 2:
The invention applies local quality by differentiating between the functional wire structure that should be preserved and the stopping point artifacts that should be removed, using selective elimination to maintain uniform surface appearance in visible areas while preserving necessary wire fixations
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 approach enables high-speed wire drawing and cutting, reduces assembly thickness, and allows for precise positioning and adaptation of components, improving the connection quality and aesthetics of radiofrequency communication products like contactless smart cards and electronic passports.
Implementation Method 1
said contact pads are connected to the terminal wire portions by welding by energy transfer through said contact pads
Implementation Method 2
the use of a wire antenna arranged in a card body made of plastic material by an ultra-sound wire inlay technology
Implementation Method 3
the conductive wire is brought into contact with the contact pads of a module or connection pads of an electronic chip and a thermo-compression probe is applied to the wire, against the pad or the pad
Data Source
Figure 1~4C
Figure 5~9
AI summary
The invention relates to a method for producing a device comprising a radiofrequency transponder antenna, said method comprising a step of producing th antenna with two terminal sections (15, 17) on a support by means of a wiring technique. The method is characterised in comprising a step of producing an end point (9) on an antenna wire at the end of at least one of said terminal sections (5, 15, 17). The invention further relates to the device produced thus.