EP-4736064-A1 - RADIO FREQUENCY TRANSCEIVER DEVICE COMPRISING A CONDUCTIVE WIRE FORMING AN ANTENNA WOUND IN TURNS

Abstract

The invention relates to a radio frequency transceiver device (1) comprising at least one conductive wire (3) that forms an antenna and is electrically connected to at least one electronic chip (2), the conductive wire (3) extending longitudinally in non-contiguous turns around a ribbon (4).

Inventors

• CARTEAUX, Nicolas
• PEFAURE, Jade

Assignees

• PRIMO1D

Dates

Publication Date

20260506

Application Date

20240405

Claims (13)

1. Radiofrequency transmitting-receiving device (1) comprising at least one conductive wire (3) forming an antenna and electrically connected to at least one electronic chip (2), the conductive wire (3) extending longitudinally in non-contiguous turns around a ribbon (4).
2. Radiofrequency transmission-reception device (1) according to the preceding claim, in which the ribbon (4) is arranged folded or wound on itself in the non-contiguous turns of the conductive wire (3).
3. Radiofrequency transmission-reception device (1) according to claim 1 in which the ribbon (4) is arranged flat in the non-adjoining turns of the conductive wire (3).
4. Radiofrequency transceiver device (1) according to one of the preceding claims, in which the ribbon (4) has a width of between 2 mm and 10 mm.
5. Radiofrequency transmitting-receiving device (1) according to one of the preceding claims having a length of between 5 and 10 cm.
6. Radiofrequency transmitting-receiving device (1) according to one of the preceding claims, in which the ribbon (4) is formed from natural or synthetic fibers and/or from a plastic material and/or from natural or synthetic rubber.
7. Radiofrequency transmission-reception device (1) according to one of the preceding claims, in which the ribbon (4) has an elastic elongation power of between 1% and 25%.
8. Radiofrequency transmission-reception device (1) according to one of the preceding claims, in which the conductive wire (3) is formed from at least one metal strand.
9. Radiofrequency transmission-reception device (1) according to one of claims 1 to 7, in which the conductive wire (3) is formed from a textile wire and at least one electrically conductive strip, the electrically conductive strip being wound in turns around the textile wire to cover it at least in part.
10. Radiofrequency transceiver device (1) according to one of the preceding claims, in which the conductive wire (3) and the electronic chip (2) are incorporated in a protective covered wire or at least partly coated with a protective material.
11. Radiofrequency transmitting-receiving device (1) according to one of the preceding claims, further comprising at least one electrically non-conductive cover wire (5) extending longitudinally in turns around the ribbon (4).
12. Radiofrequency transmitting-receiving device (1) according to one of the preceding claims having cauterized ends (6).
13. Radiofrequency transmission-reception device (1) according to one of the preceding claims in which the non-contiguous turns have a density of between 300 turns/m and 500 turns/m.

Description

Radiofrequency transmitting-receiving device comprising a conductive wire forming an antenna wound in turns FIELD OF THE INVENTION TECHNOLOGICAL BACKGROUND OF THE INVENTION SUBJECT OF THE INVENTION BRIEF DESCRIPTION OF THE INVENTION The present invention relates to a radiofrequency transmission and reception device, such as an RFID tag. More particularly, the present invention relates to a flexible and robust radiofrequency transmission and reception device. Such a device finds an application in the field of labeling objects, and more particularly objects likely to deform as is the case, for example, in the textile field or for objects formed from a deformable material such as rubber-based objects. Document WO2019/175509 proposes a radiofrequency transceiver device comprising an electronic circuit (for example a transponder) formed of a transceiver chip, in particular an identification chip, and an antenna electrically connected to the chip. According to this document, the metal wire forming the antenna is wound in turns, covered, around a core film. This forms a transceiver device having a wire form factor that is easily integrated into a wide variety of objects, for their identification, their tracking, their administration or the monitoring of their environments. The radiofrequency transceiver device proposed by this document has a wire form factor, a deformable character (i.e. it conforms to tensile, bending and/or torsional constraints) which forms very advantageous characteristics for its integration into certain products, such as textile or rubber-based products in particular. Due to the helical winding of the antenna on the core wire, the device can undergo significant longitudinal tensile forces, without putting tension on the metal wire forming the antenna and therefore without risking breaking this wire, or disconnecting its connection to the chip. This is particularly the case when the core wire is chosen to be extensible, having an elongation power much greater than the elongation power of the metal wire forming the antenna. An aim of the invention is to propose a radiofrequency transmission-reception device which is distinguished from the state of the art. This transmission-reception device may be more compact than a device of the state of the art. It may also have a flexible character. With a view to achieving one of these aims, the subject of the invention proposes a radiofrequency transmission-reception device comprising at least one conductive wire forming an antenna and electrically connected to at least one electronic chip, the conductive wire extending longitudinally in non-contiguous turns around a ribbon. According to other advantageous and non-limiting characteristics of the invention, taken alone or in any technically feasible combination: the ribbon is arranged folded or wound on itself in the non-joining turns of the conductive wire; the tape is laid flat in the non-contiguous turns of the conductive wire; the ribbon has a width between 2 mm and 10 mm; the radio frequency transmitting-receiving device has a length of between 5 and 10 cm; the ribbon is formed from natural or synthetic fibres and/or a plastic material and/or natural or synthetic rubber; The tape has an elastic elongation power of between 1% and 25%. the conductive wire is formed of at least one metal strand; the conductive wire is formed from a textile wire and at least one electrically conductive ribbon, the electrically conductive ribbon being wound in turns around the textile wire; the conductive wire and the electronic chip are incorporated in a protective covered wire or at least partly coated with a protective material; the radiofrequency transmitting-receiving device further comprises at least one electrically non-conductive cover wire extending longitudinally in turns around the ribbon; the radiofrequency transmitting-receiving device has cauterized ends; the non-joining coils have a density between 300 turns/m and 500 turns/m. Other characteristics and advantages of the invention will emerge from the detailed description of the invention which follows with reference to the appended figures in which: There represents a radiofrequency transmission-reception device according to the invention; Figures 2a, 2b, 2c illustrate, in section, three embodiments of a radiofrequency transmission-reception device according to the invention; There represents a chain of electronic chips; There illustrates an example of interconnecting a chip to a conductive wire in a chain of electronic chips. DETAILED DESCRIPTION OF THE INVENTION There represents an embodiment of the radiofrequency transmitting-receiving device 1 which is the subject of the present description. This device 1 comprises, in a very general manner, a conductive wire 3 forming an antenna and electrically connected to an electronic chip 2. The conductive wire 3 extends longitudinally in non-contiguous turns around a ribbon 4. The ribbon 4 forms a support for the