Textile Antenna RF Transceiver via Electromagnetic Coupling
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Solution Overview
Problem
Existing radio frequency transmit/receive devices are fragile under tensile, torsional, or shear stresses, making them unsuitable for integration into deformable objects like textiles, and they lack flexibility and robustness in electrical connections.
Innovation Solution
A flexible radio frequency transmit/receive device is designed with a textile core wire and a conductive textile element forming a second antenna, which is wound in non-contiguous turns, ensuring electromagnetic coupling without direct mechanical connections, and is encapsulated in a flexible sheath for robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna wires are soldered to chip pads, then electrical connection is established, but the connection becomes fragile under tensile, torsional, or shear stresses
Solution Approach 1:
The patent replaces the mechanical soldering connection system with an electromagnetic coupling system. The first antenna (micro-coil) on the chip and the second antenna (conductive textile element) are positioned in close proximity to enable electromagnetic coupling, eliminating the need for physical mechanical connections and their associated fragility under stress.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary between the chip and the external circuit. Instead of direct mechanical contact, the micro-coil and conductive textile element serve as intermediaries that transfer energy and signals through electromagnetic coupling, protecting the connection from mechanical stresses.
2Reliability
If rigid steel wire spring antenna is used, then radio frequency communication function is achieved, but the device becomes rigid and cannot be integrated into textile objects
Solution Approach 1:
The patent replaces the rigid steel wire spring antenna with a flexible conductive textile element that can be integrated into textile objects. The conductive textile element maintains the necessary electrical properties for RF communication while possessing the flexibility required for integration into deformable textile structures.
Solution Approach 2:
The patent uses composite materials by combining conductive materials with textile substrates to create the conductive textile element. This composite structure provides both the electrical conductivity needed for antenna function and the flexibility required for textile integration, resolving the contradiction between functional performance and adaptability.
3Ease of manufacture
If antenna wire with circular cross-section is inserted into groove, then electrical connection is made, but the connection remains vulnerable to mechanical stresses
Solution Approach 1:
The patent eliminates the mechanical insertion and soldering process by using electromagnetic coupling between the micro-coil and conductive textile element. This substitution maintains ease of manufacture through standardized positioning while dramatically improving connection durability by removing the vulnerable mechanical joint entirely.
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 device achieves flexibility and robustness, allowing integration into textile items while avoiding fragile connections, enabling high-volume production and effective operation under deformation.
Implementation Method 1
a second antenna in the form of a conductive textile element wound in non-contiguous turns around and along a textile core wire
Implementation Method 2
a first antenna in the form of a micro-coil whose impedance is matched to the impedance of the semiconductor chip
Data Source
Figure 1a~2
Figure 3~5
AI summary
The invention relates to a radiofrequency transceiver device (1) comprising an electronic circuit (2) comprising a chip and a first antenna electrically connected to the chip, a textile-core thread (4) formed of a non-conductive material, and a second antenna formed of a textile element (3) in an electrically conducting material and disposed in non-contiguous turns around and along the textile-core thread (4). The electronic circuit (2) is disposed relative to the second antenna so as to allow the electromagnetic coupling of the first and second antenna. The invention also relates to a label incorporating the radiofrequency transceiver device (1) and to its method of manufacture.