EP3391461B1 - Wireless communication module, plate suitable for use in manufacturing said module and method for manufacturing said module - Google Patents

Wireless communication module, plate suitable for use in manufacturing said module and method for manufacturing said module Download PDF

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Publication number
EP3391461B1
EP3391461B1 EP16825851.5A EP16825851A EP3391461B1 EP 3391461 B1 EP3391461 B1 EP 3391461B1 EP 16825851 A EP16825851 A EP 16825851A EP 3391461 B1 EP3391461 B1 EP 3391461B1
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EP
European Patent Office
Prior art keywords
antenna
winding
windings
fold line
substrate
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EP16825851.5A
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German (de)
French (fr)
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EP3391461A1 (en
Inventor
Ahmed Ali
Tiphaine GROULT
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Idemia France SAS
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Idemia France SAS
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Publication of EP3391461A1 publication Critical patent/EP3391461A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal

Definitions

  • the present invention relates to wireless communication modules, for example of the RFID (“Radio Frequency ID entity”) type.
  • the present invention further relates to plates suitable for use in the manufacture of such wireless communication modules and to a method of manufacturing such wireless communication modules.
  • RFID technology is widely used today in payment, identification and secure access applications.
  • the figure 1 shows a wireless communication module 100 comprising a substrate 102 on which are mounted an electronic chip 104 (or integrated circuit) and an antenna 106.
  • the antenna 106 takes the form of a winding 108 comprising at least one turn 110 of the form generally square or rectangular.
  • the outer coil 110 that is to say the coil 110 closest to the edge of the substrate 102, is of dimensions a and b.
  • the electronic chip 104 is capable, using the antenna 106 to which it is connected, of communicating with a transceiver (more generally called a “reader”), that is to say capable of receiving requests. transmitted from this transceiver and respond to these requests.
  • a transceiver more generally called a “reader”
  • the figure 2 represents an electrical diagram corresponding to the wireless communication module 100 of the figure 1 .
  • This electrical diagram comprises an RLC circuit 200 corresponding to the antenna 106.
  • This RLC circuit 200 comprises a resistor 202 connected in series with a coil 204 and a capacitor 206.
  • the electrical diagram also comprises an RC circuit 210 corresponding to the integrated circuit 104
  • This RC circuit 210 connected in parallel to the RLC circuit 200, comprises a resistor 212 connected in parallel to a capacitor 214.
  • Wireless communication modules are often incorporated into small portable devices, such as bracelets, watches and key chains. These portable devices can include other electronic circuits and sensors. The space available in these portable devices for the wireless communication modules is therefore reduced, and varies depending on the device. There is thus a strong demand for wireless communication modules of small size, which can be integrated into any type of portable device.
  • the wireless communication modules are a real challenge, because the communication between the modules and the readers is governed by standards, such as the ISO 14443 standard for high frequency RFID type modules.
  • the antennas must therefore be designed so that the wireless communication modules can communicate at communication frequencies defined by these standards and can maintain the communication performance defined by these standards.
  • the physical parameters of the antenna such as its external and internal dimensions, its number of turns or the distance between two adjacent turns, influence the resistance, inductance and capacitance values of the antenna (cf. RLC 200 circuit shown in figure 2 ), which define the value of the communication frequency of the wireless communication module.
  • the engraving technology forming a printed circuit, is a high precision technology (tolerance of 100 micrometers) making it possible to exploit a large proportion of the surface on which the metal is engraved.
  • the document US 2011/0169702 describes an antenna module for producing a transponder.
  • the document US 2006/0237544 describes an antenna circuit for an integrated circuit card or tag.
  • the invention makes it possible to manufacture a wireless communication module having a limited size and an antenna having good performance.
  • the communication module can thus have a very high number of configurations.
  • the number of windings, the order of folding, the thickness of the substrate, the relative alignment after folding of the turns of one winding relative to the turns of another winding can be chosen to modify the parameters of the antenna. , while accepting the constraints of the dimensions of the substrate. It is for example possible to provide a large number of windings, for example greater than two.
  • the invention offers a wide range of adjustment of the resistance, inductance and capacitance values of the antenna, which makes it possible to improve the performance of the antenna.
  • the arrangement of windings on different portions allows, when the plate is folded along the fold line assembly to form a wireless communication module, to create additional capacity.
  • This additional capacity makes it possible to compensate for the low inductance generated by the small dimensions of the antenna without increasing the resistance, and thus makes it possible to adjust the value of the communication frequency of the wireless communication module without adding an additional turn.
  • the invention makes it possible to overcome the problems of manufacturing tolerance.
  • the number of windings is no longer limited, it is possible not to use the entire useful surface of the substrate for forming the turns of the windings.
  • the dimensions of the peripheral coil can also be reduced.
  • the arrangement of the antenna and in particular of the ends of the antenna simplifies the manufacture of the plate, and therefore of the communication module for which the plate is used.
  • This arrangement makes it possible, for example, to dispense with a second substrate used to connect the electronic chip to the ends of the antenna, or even operations for drilling holes in a substrate in order to position the antenna on both sides of the substrate.
  • the arrangement of the two ends of the antenna makes it possible to easily electrically connect the two ends to the electronic chip.
  • the electrical insulation of at least part of the antenna surface facilitates the positioning of the antenna.
  • the connections between two windings or between a winding and one end can pass through winding turns without creating short circuits, because there is no electrical contact at the point of intersection of the turn and the connection. .
  • Great liberties are thus offered as regards the design of the antenna, which makes it possible to easily position the two ends on the same portion of the plate, for example within the same winding.
  • the plate is suitable for use in the manufacture of a module as described below.
  • the substrate has dimensions less than or equal to a quarter of the ID-1 format.
  • the invention is in fact particularly advantageous for small-sized communication modules.
  • the antenna has the same construction over its entire length.
  • the windings are formed on the same face of the substrate.
  • the formation of the plurality of windings on the same face of the substrate facilitates and increases the speed of the manufacture of the plate, and therefore of the wireless communication module.
  • the antenna is incorporated in the substrate.
  • the two ends are positioned inside the same winding of the plurality of windings.
  • two turns of the plurality of windings are arranged substantially symmetrically with respect to said fold line.
  • each fold line of the fold line assembly separating two portions each comprising a winding
  • the direction of flow of the current in the turns of said windings is symmetrical with respect to said fold line.
  • the symmetry of the direction of current flow allows, when the plate is folded according to the fold line assembly in order to manufacture a wireless communication module, that when a current flows through the antenna, the current flows in the same sense in each turn.
  • the flow of current in the same direction in each turn of the antenna makes it possible to add the magnetic field fluxes passing through the various windings and therefore to increase the current induced in the antenna.
  • At least one portion comprises a winding having a turn following the contour of said portion.
  • the minimum distance between two turns of the same winding is 100 micrometers.
  • the dimensions of the module made from the plate are reduced, and the module can be incorporated into portable devices of small dimensions.
  • the plate comprises at least three portions each comprising a winding.
  • the module is made from the plate as described above.
  • the substrate and the antenna of the module correspond respectively to the substrate and to the antenna of said plate, the substrate having been folded.
  • the windings are arranged so that when a current flows in the antenna, the current flows in the same direction in each turn.
  • an insulating layer is positioned between at least two of the layers formed by the folding of said substrate.
  • the module operates at a communication frequency of 13.56 MHz.
  • two turns of the plurality of windings are superimposed.
  • the method is a method for manufacturing the module described above.
  • the method further comprises the lamination of the plurality of superimposed layers.
  • the supply step comprises a step of forming an antenna comprising a continuous deposition of the wire on the substrate.
  • the present invention relates to wireless communication modules, for example of the RFID (“Radio Frequency ID entity”) type.
  • the present invention further relates to plates suitable for use in the manufacture of such wireless communication modules and to a method of manufacturing such wireless communication modules.
  • a plate 300 comprising a substrate 302 delimited by edges 302a, 302b, 302c, 302d, and an antenna 304 having a surface at least partially electrically isolated.
  • the antenna 304 comprises two ends 306, 308 adapted to be connected to an electronic chip 310, and a plurality of windings 312, 314, 516, 718, each comprising at least one turn 320, for example a plurality of turns 320.
  • the windings 312, 314, 516, 718 can have the same number of turns or a different number of turns.
  • the general shape of the turns 320 is for example square or rectangular.
  • the plate 300 comprises a plurality of portions 330, 332, 534, 636 delimited by a fold line assembly comprising at least one fold line 340, 510 and by the edges 302a, 302b, 302c, 302d of the substrate 302, so that at least two of the portions 330, 332, 534, 636 each comprise at least one winding 312, 314, 516, 718, and that the two ends 306, 308 are arranged at the same portion 330.
  • windings 312, 314, 516, 718 on different portions 330, 332, 534, 636 allows, when the plate 300 is folded along the fold line assembly in order to manufacture a wireless communication module, to create additional capacity.
  • Each turn 320 of a winding 312, 314, 516, 718 facing a turn 320 of another winding 312, 314, 516, 718 when the plate 300 is folded creating an individual capacity the capacity additional is equal to the sum of the individual capacities. This additional capacity makes it possible to compensate for the low inductance generated by the small dimensions of the antenna.
  • a capacitor is formed between two wires extending in parallel and traversed by a current.
  • the stack of layers formed by the portions 330, 332, 534, 636, comprising windings 312, 314, 516, 718 formed from conductive wire, makes it possible to achieve an additional capacity through the thickness of the substrate 302. The distance, wire diameter and the material separating the wires influence the value of the additional capacitance.
  • the additional capacity created during the folding of the plate may be twenty picofarads.
  • the figure 16 represents an electrical diagram corresponding to a module made from the folding of a plate 300.
  • This electrical diagram comprises an RLC 1600 circuit corresponding to the antenna 304.
  • This RLC 1600 circuit comprises a resistor 1602 connected in series with a coil 1604 and a capacitor 1606.
  • An additional capacitor 1607, representing the additional capacitance, is connected in parallel across the terminals of the capacitor 1606.
  • the electric diagram further includes an RC 1610 circuit corresponding to the electronic chip 310.
  • This RC 1610 circuit connected in parallel to the terminals of the additional capacitor 1607, has a resistor 1612 connected in parallel to a capacitor 1614.
  • the arrangement of the antenna 304 and in particular of the ends 306, 308 of the antenna 304 simplifies the manufacture of the plate 300, and therefore of the communication module for which the plate 300 is used.
  • This arrangement makes it possible, for example, to dispense with a second substrate used to connect the electronic chip to the ends of the antenna, or even operations for drilling holes in a substrate in order to position the antenna on both sides of the substrate. .
  • the substrate 302 is in the form of a plate, comprising for example two opposite faces and four edges 302a, 302b, 302c, 302d connecting said opposite faces.
  • the opposite faces are square or rectangular in shape.
  • the portions 330, 332, 534, 636, depending on the positioning of the fold line or lines 340, 542, can thus have a square or rectangular surface, and have the same dimensions.
  • the substrate 302 can be plastic, for example PVC (polyvinyl chloride), or else PET (polyethylene terephthalate).
  • the dimensions of the substrate 302 are less than or equal to a quarter of the ID-1 format (85.6 millimeters by 53.98 millimeters) defined by the ISO 7810 standard.
  • Each fold line 340, 542 can be formed by thinning the material of the substrate 302, or by folding and unfolding the substrate 302.
  • each winding 312, 314, 516, 718 is connected to a end 306, 308 and another winding 312, 314, 516, 718 or is connected to two other windings 312, 314, 516, 718.
  • the connection between a winding 312, 314, 516, 718 and another winding 312, 314, 516, 718 or an end 306, 308 is provided by a link 350, 352, 354, 556, 758.
  • the link 350, 352, 354, 556, 758 is for example a conductive element extending between two windings 312, 314, 516, 718 or between a winding 312, 314, 516, 718 and one end 306, 308.
  • the link 350, 352, 354, 556, 758 is for example a section common to two windings 312, 314, 516, 718.
  • the link 350, 352, 354, 556, 758 connecting two windings 312, 314, 516, 718 crosses a fold line 340, 510.
  • the antenna 304 has the same constitution over its entire length, that is to say the same composition of matter.
  • the antenna 304 is formed by a conductive element, for example a metal wire.
  • the material of this conductive element is for example copper.
  • the windings 312, 314, 516, 718 and the links 350, 352, 354, 556, 758 are then formed from the same metal wire, and the ends 306, 308 of the antenna 304 are the two ends of the metal wire.
  • the antenna 304 is formed by a plurality of conductive elements, for example a plurality of metal wires such as the metal wire described above.
  • Each winding 312, 314, 516, 718 can then be formed by a different metal wire, and be connected in series with another winding 312, 314, 516, 718 and one end 306, 308, or connected in series with two other windings 312, 314, 516, 718 in particular by means of links 350, 352, 354, 556, 758.
  • the antenna 304 is then formed of a continuous wire of material or of a set of conductive elements physically connected to each other and which follow one another so that the entire antenna 304 is mounted on the substrate 302, for example on the same face of substrate 302.
  • the external surface of the antenna 304 is for example at least partially electrically isolated, for example electrically isolated.
  • the metal wire may for this purpose comprise a sheath of insulating material over part or all of its length, or be an enamelled metal wire, for example by a plastic layer (eg polyurethane).
  • the electrical insulation of the surface of the antenna 304 facilitates the positioning of the antenna 304.
  • the links 350, 352, 354, 556, 758 can pass through the winding turns 320 312, 314, 516, 718. without creating short circuits, because there is no electrical contact at the point of intersection of the coil 320 and the link 350, 352, 354, 556, 758.
  • Great liberties are thus offered as regards the design of the antenna 304, which makes it possible to easily position the two ends 306, 308 on the same portion 330, 332, 534, 636 of plate 300 , for example inside the same winding 312, 314, 516, 718.
  • the antenna 304 is positioned on the substrate 302. More precisely, the two ends 306, 308 can be arranged at the same face of the same portion 330.
  • the windings 312, 314, 516, 718 or any the antenna 304 can be positioned on the same face of the substrate 302.
  • the production of the plate 300 and therefore of the communication module for which the plate 300 is used is facilitated.
  • the windings 312, 314, 516, 718 are not all positioned on the same face of the substrate 302.
  • the wire is fixed to one face of the substrate 302, for example by gluing points.
  • the attachment of the antenna 304 is then improved during a lamination which will be described later.
  • the antenna 304 is partially incorporated into the substrate 302. More precisely, the antenna 304 is partially incorporated into the substrate 302, at the same face of the substrate 302.
  • the metal wire can be embedded in the substrate 302 by means of a technique using ultrasound. The wire is for example encrusted up to about half of its diameter.
  • At least one of the portions 330, 332, 534, 636 of the plate 300 may include a winding 312, 314, 516, 718 having a turn 320 following the contour of said portion 330, 332, 534, 636, that is to say along the edges 302a, 302b, 302c, 302d and the at least one fold line 340, 542 defining the portion 330, 332, 534, 636.
  • the winding 312, 314, 516, 718 thus comprises an outer (or peripheral) turn 320 positioned near the contour of said portion 330, 332, 534, 636 so as to delimit, in top view of the plate 300, a surface having dimensions which are as large as possible.
  • external turn or peripheral turn, is meant the turn 320 of the winding 312, 314, 516, 718 closest to the edges 302a, 302b, 302c, 302d of the substrate 302 and to the fold line 340, 542 defining the portion 330, 332, 534, 636 including turn 320.
  • manufacturing tolerances imply that outer turn 320 is positioned approximately more than 500 microns from the contour of portion 330, 332, 534, 636.
  • the dimensions of the outer coil 320 are equal to a quarter of the maximum dimensions of a “Class 1” antenna, the maximum dimensions being defined by the ISO 14443 standard as being 81 millimeters by 49 millimeters.
  • the minimum distance between two turns 320 of the same winding 312, 314 is 100 micrometers.
  • two sections of two turns 320 or two turns 320 of the plurality of windings 312, 314, 516, 718 can be arranged symmetrically with respect to each other. to this fold line 340, 542.
  • Said two turns 320 are for example two outer turns 320 of two windings 312, 314, 516, 718 positioned on two portions 330, 332, 534, 636 separated by a fold line 340, 542 Alternatively or in addition, for at least one fold line 340, 542 of the fold line assembly, the windings 312, 314, 516, 718 can be arranged symmetrically with respect to this fold line 340, 542 .
  • the figures 8A, 8B and 8C are diagrams showing how the windings 312, 314, 516, 718 can be arranged and connected by the links 350, 556, 758 on the substrate 302 so that for each fold line 340, 542 of the fold line assembly separating two portions each comprising a winding 312, 314, 516, 718, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of said windings 312, 314, 516, 718 is symmetrical with respect to said fold line 340, 542.
  • These figures 8A, 8B and 8C show windings 312, 314, 516, 718 comprising a turn and forming part of the antenna. These figures do not show the entire antenna, in particular not the ends of the antennas. However, it will be understood that windings comprising a plurality of turns and the ends of the antennas have not been shown solely for reasons of readability.
  • the symmetry of the direction of current flow allows, when the plate 300 is folded along the fold line assembly to fabricate a wireless communication module, that when a current flows through the antenna 304, the current flows through it. the same direction in each turn 320.
  • the flow of current in the same direction in each turn 320 of the antenna 304 makes it possible to add the magnetic field fluxes passing through the different windings 312, 314, 516, 718 and therefore increase the current induced in the antenna 304.
  • the figures 9A and 9B show windings 900, 902, 904, 906 positioned and connected by links 910, 912 so as not to allow, when a current flows in the antenna, that the direction of current flow in the turns of said windings is symmetrical with respect to fold lines 340, 542.
  • the electronic chip 310 can be positioned on the same portion 330 as the two ends 306, 308 of the antenna 304 (cf. figures 3 to 7 ).
  • the two ends 306, 308 of the antenna 304 can thus be easily electrically connected to the electronic chip 310.
  • the plate 300 can thus include the electronic chip 310, or not include it.
  • the electronic chip 310 is preferably positioned inside a winding 312.
  • the two ends 306, 308 of the antenna 304 are also positioned inside this same winding 312.
  • the configuration of the plate 300 makes it possible to choose a number of windings 312, 314, 516, 718 and of turns 320 per winding 312, 314, 516, 718 allowing to manufacture a wireless communication module operating at a predetermined frequency, that is, that is to say, making it possible to generate a sufficient current in order to activate the electronic chip 310 at said frequency, with a minimum activation field (for a form factor of the antenna defined by the dimensions of the external coil) .
  • the configuration of the plate 300 in a plurality of portions 330, 332, 534, 636 which can be folded over one another makes it possible to reduce the number of turns 320 per portion 330, 332, 534, 636.
  • This reduction in the number of turns 320 leads to a reduction in the resistance of the module created from the plate 300, and thus makes it possible to limit the loss of energy during the flow of current in the turns 320.
  • the threshold field, c ' that is to say the field from which the electronic chip 310 is activated (measured in A / m) is then improved, as well as the range of the threshold field.
  • the reduction in the number of turns 320 per winding 312, 314, 516, 718 makes it possible to increase the effective area of the antenna 304, defined by the turn 320 of the windings 312, 314 having the smallest dimensions. Therefore, the magnetic flux passing through the antenna 304 is increased, as it depends on the area it passes through.
  • Table 1 below shows antenna designs for obtaining an OFF state frequency (ie a frequency from which the microchip is no longer activated) of approximately 14.2 Megahertz and a field threshold of about 3 A / m.
  • the “antenna 1” corresponds to a conventional antenna comprising a winding having an outer turn of 25 millimeters by 15 millimeters.
  • the “antenna 2” corresponds to an antenna of a module according to an exemplary embodiment of the invention comprising two windings each having an external turn of 25 millimeters by 15 millimeters.
  • the “antenna 3” corresponds to an antenna of a module according to an exemplary embodiment of the invention comprising three windings each having an external turn of 25 millimeters by 15 millimeters.
  • This table 1 shows that the reading distance increases and that the threshold field decreases when using antennas comprising several windings and having external turns of the same size as the external turn of the antenna comprising a single winding.
  • the figure 3 describes the plate 300 according to an exemplary embodiment of the invention.
  • the antenna 304 has a first winding 312 and a second winding 314.
  • Each winding 312, 314 has two turns 320.
  • each winding 312, 314 may have a number of turns greater than or equal to one and different from two, for example three or four, this number possibly being different depending on the winding 312, 314.
  • the plate 300 comprises two portions 330, 332 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising a fold line 340. More specifically, the plate 300 comprises a first portion 312, delimited by the right edge 302a of the substrate 302, the fold line 340, which for example extends substantially parallel to the right edge 302a, a first part of the top edge 302d connecting the right edge 302a and the fold line 340, and a first part of the bottom edge 302b connecting the right edge 302a and the fold line 340.
  • the plate 300 further comprises a second portion 314, delimited by the left edge 302c of the substrate 302, the fold line 340, a second part of the edge top 302d connecting the left edge 302c and the fold line 340, and a second part of the bottom edge 302b connecting the left edge 302c and the fold line 340.
  • the portions 330 and 332 can have substantially the same dimensions.
  • top, bottom, right, left is meant four different orientations with respect to the plate seen from above.
  • top and bottom is meant two opposite directions of the same so-called vertical direction.
  • above is meant higher in the vertical direction.
  • below is meant lower in the vertical direction.
  • right and left is meant two opposite directions of the same so-called horizontal direction, the vertical and horizontal directions being substantially orthogonal in the plane of the face of the plate considered.
  • the first portion 330 comprises the first winding 312 and the second portion 332 comprises the second winding 314, the two ends 306, 308 being arranged at the same portion, for example at the level of the first portion 330 comprising the first winding 312.
  • Each winding 312, 314 is connected to a respective end 306, 308, for example the winding 312 is connected to the end 308 and the winding 314 is connected to the end 306.
  • the winding 314 is for example connected to the end 306 by a link 352 which crosses the fold line 340, for example substantially in its middle and one or more turns 320, for example by extending in a direction substantially parallel to the top edge 302d or to the bottom edge 302b.
  • the winding 312 is for example connected to the end 308 by a link 354, which may not pass through a turn 320.
  • the two windings 312, 314 are connected to each other by a link 350.
  • the link 350 crosses the fold line 340.
  • the link 350 comprises for example a part extending substantially between the bottom edge 302b and the top edge 302d, this part for example crossing the fold line 340 substantially in its middle.
  • the electronic chip 310 can be positioned on the portion 312 comprising the ends 306, 308.
  • a plurality of sections of the two windings 312, 314 are arranged symmetrically with respect to the fold line 340.
  • two turns, each of one of the two windings 312, 314 are arranged symmetrically with respect to the line. of folding 340.
  • only the outer turns 320 can be symmetrical, because, for example, these two windings 312, 314 do not have the same number of turns 320.
  • the two windings 312, 314 may comprise the same number of turns 320, each turn 320 of one of the windings 312, 314 having substantially the same dimensions and the same positioning on the portion 330, 332 comprising said winding 312, 314 as a turn 320 of the other winding 312, 314 on the other portion 330, 332.
  • the two windings 312, 314 are not arranged symmetrically with respect to the fold line 340.
  • the antenna 304 is positioned on the substrate 302 so that, for the fold line 340 separating the two portions 330, 332, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 314 is symmetrical with respect to the fold line 340. In other words, in top view, when current flows counterclockwise in winding 312, it flows clockwise in winding 314. This is in particular permitted by the arrangement of link 350.
  • the configuration of the plate 300 in two portions 330, 332 each comprising a winding 312, 314 and which can be folded over one another makes it possible to position half the number of turns 320 on each portion 330, 332 than on a conventional plate. comprising a single portion having the same dimensions as a portion 330, 332 of the plate 300.
  • the dimensions a and b of the outer coil 110 of the module 100 of the figure 1 are the same as the dimensions a and b of the outer turns of the windings 312, 314 of the plate 300 of the figure 3 , and the module 100 has four turns. It is thus possible to position two turns 320 on each portion 312, 314 of the plate 300, the two turns 320 having the dimensions of the two largest turns of the module 100.
  • the effective area of the antenna 304, defined by the turn 320 windings 312, 314 having the smallest dimensions, is then greater than the effective area of the antenna of the module 100, which makes it possible to reduce the threshold field and to improve the performance of the antenna.
  • the configuration of the plate in two portions 330, 332 each comprising a winding 312, 314 and being able to be folded one on the other also makes it possible to reduce the dimensions of the antenna 304 while maintaining the same performances of the antenna 304.
  • the figure 4 shows for example a plate 300 different from the plate 300 of the figure 3 in that each winding 312, 314 has four turns and in that the length a 'of the section of the outer turn following the straight edge 302a is equal to the length a of the section of the outer turn of the figure 3 along the right edge 302a divided by two.
  • the figure 5 describes the plate 300 according to another exemplary embodiment of the invention.
  • the antenna 304 has a first winding 312, a second winding 314, and a third winding 516.
  • the plate 300 comprises three portions 330, 332, 534 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two fold lines 340, 542.
  • the first portion 312 is delimited by the right edge 302a of the substrate 302, the first fold line 340, which extends for example substantially parallel to the right edge 302a, a first part of the top edge 302d connecting the right edge 302a and the fold line 340, and a first portion of the bottom edge 302b connecting the straight edge 302a and the fold line 340.
  • the second portion 314 is delimited by the first fold line 340, the second fold line 542, a second part of the top edge 302d connecting the first fold line 340 to the second fold line 542, and a second part of the bottom edge 302b connecting the first fold line 340 to the second fold line 542.
  • the third portion 516 is delimited by the second fold line 542 the left edge 302c of the substrate 302, a third part of the top edge 302d connecting the second fold line 542 to the left edge 302c, and a third part of the bottom edge 302b connecting the second fold line 542 at left edge 302c.
  • the first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, and the third portion 534 comprises the third winding 516.
  • the two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312.
  • the first winding 312 is connected to the end 308, for example by a link 354.
  • the link 354 does not pass through a turn 320.
  • the first winding is further connected to the second winding 314, for example by a link 350.
  • the link 350 crosses the fold line 340.
  • the link 350 comprises for example a part extending substantially between the bottom edge 302b and the top edge 302d, this part for example crossing the fold line 340 substantially in its middle.
  • the second winding is further connected to the third winding 516, for example by a link 556.
  • the link 556 crosses the fold line 542.
  • the link 556 extends for example substantially between the bottom edge 302b and the top edge 302d, this part crossing for example the fold line 542 substantially in its middle.
  • the third winding 516 is connected to the end 306, for example by a link 352 which crosses the fold lines 340, 542 and several turns 320.
  • the link 352 in one example crosses the fold lines 340, 542 substantially in their centers, and may extend in a direction substantially parallel to the top edge 302d or to the bottom edge 302b.
  • the electronic chip 310 can be positioned on the portion 312 comprising the ends 306, 308.
  • a plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the fold line 340.
  • two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically by with respect to the fold line 340.
  • a plurality of sections of the second and third windings 314, 516 are disposed symmetrically with respect to the fold line 542.
  • two turns 320, each of one of the two windings 314, 516 can be arranged symmetrically with respect to the fold line 542.
  • the three windings 312, 314, 516 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516 having substantially the same dimensions and the same positioning on the portion 330, 332, 534 comprising said winding 312, 314, 516 than a turn 320 of the other windings 312, 314 on the other portions 330, 332, 534.
  • the two windings 312, 314 are not arranged symmetrically with respect to the fold line 340, because, for example, these two windings 312, 314 do not have the same number of turns 320.
  • the two windings 314, 516 are not arranged symmetrically with respect to the fold line 542, because, for example, these two windings 314, 516 do not have the same number of turns 320. In one example, only the outer turns 320 can be symmetrical.
  • the antenna 304 is positioned on the substrate 302 so that, for the fold line 340 separating the two portions 330, 332, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 314 is symmetrical with respect to the fold line 340. In other words, in top view, when current flows counterclockwise in winding 312, it flows clockwise in winding 314. This is in particular permitted by the arrangement of link 350.
  • the antenna 304 is further positioned on the substrate 302 so that, for the fold line 542 separating the two portions 332, 534, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 314, 516 is symmetrical with respect to the fold line 542. In other words, when viewed from above, when the current flows clockwise in the winding 314, it flows counterclockwise in the winding 516. This is in particular permitted by the arrangement of link 556.
  • the figure 6 describes the plate 300 according to another exemplary embodiment of the invention.
  • the antenna 304 has a first winding 312, a second winding 314, and a third winding 516.
  • the plate 300 comprises four portions 330, 332, 534, 636 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two fold lines 340, 542.
  • the first fold line 340 extends from the top edge 302d to the bottom edge 302b and the second fold line 542 extends from the left edge 302c to the right edge 302a crossing the first fold line 340, so as to form the four portions 330, 332, 534 , 636.
  • the first portion 330 is positioned to the right of the first fold line 340 and above the second fold line 542.
  • the second portion 332 is positioned to the left of the first fold line 340 and above the second line fold 542.
  • the third portion 534 is positioned to the right of the first fold line 340 and below the second fold line 542.
  • the fourth portion 636 is positioned to the left of the first fold line 340 and below of the second fold line 542.
  • the top edge 302d is substantially parallel to the bottom edge 302b and the second fold line 542, and is substantially perpendicular to the left edge 302c, which is substantially parallel to the right edge 302a and the first fold line 340.
  • the first fold line 340 may extend substantially from the middle of the top edge 302d to the middle of the bottom edge 302b and the second fold line may extend substantially from the middle of the right edge 302a to the middle of the left edge 302c, so that the four portions 330, 332, 534, 636 have substantially the same dimensions.
  • the first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, and the third portion 534 comprises the third winding 516.
  • the two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312.
  • the fourth portion 636 has no winding.
  • the first winding 312 is connected to the end 308, for example by a link 354. In one example, the link 354 does not pass through a turn 320.
  • the first winding 312 is further connected to the second winding 314, for example by a link 350.
  • the link 350 passes through the first fold line 340.
  • the link 350 comprises for example a part extending substantially between the second fold line 542 and the top edge 302d, this part passing for example through the part of the first line fold 340 between the top edge 302d and the second fold line 542 substantially in its middle.
  • the second winding 314 is further connected to the third winding 516, for example by a link 556.
  • the link 556 crosses the first fold line 340 and the second fold line 542, and can also pass through one or more turns 320.
  • the link 556 extends for example from the end of a turn 320 inside the second winding 314 and near the fold lines 340, 542 (at least at about 500 micrometers), at the start of the outer turn 320 of the third winding 516 near the fold lines 340, 542.
  • the third winding 516 is connected to the end 306, for example by a link 352 which crosses the second fold line 542 and can pass through one or more turns 320.
  • the link 352 in one example crosses the second fold line 542 close to the first fold line 340, and may extend in a direction substantially parallel to the first fold line 340.
  • the electronic chip 310 can be positioned on the first portion 312 comprising the ends 306, 308.
  • a plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the first fold line 340.
  • two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically. relative to the first fold line 340.
  • a plurality of sections of the first and third windings 312, 516 are arranged symmetrically with respect to the second fold line 542.
  • two turns 320, each of one of the two windings 312, 516 can be arranged symmetrically with respect to the second fold line 542.
  • the three windings 312, 314, 516 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516 having substantially the same dimensions and the same positioning on the portion 330, 332, 534 comprising said winding 312, 314, 516 than a turn 320 of the other windings 312, 314, 516 on the other portions 330, 332, 534.
  • the three windings 312, 314, 516 are not arranged symmetrically with respect to the fold lines 340, 542 because, for example, these three windings 312, 314, 516 do not have the same number of turns 320. In one example, only the outer turns 320 are symmetrical.
  • the antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the first portion 330 and the second portion 332, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340.
  • the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340.
  • the current flows counterclockwise in the winding 312, it flows in the opposite direction. clockwise in winding 314. This is in particular permitted by the arrangement of link 350.
  • the antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the first portion 332 and the third portion 534, when a current is flowing through the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 516 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the clockwise in the winding 516. This is in particular permitted by the arrangement of the link 556.
  • the portion 636 not comprising a winding can be cut in order to limit the thickness of the module after folding, or kept insofar as it has a small thickness and participates in the adjustment of the parameters, in particular the capacitance, of the antenna. .
  • the figure 7 describes the plate 300 according to another exemplary embodiment of the invention.
  • the antenna 304 has a first winding 312, a second winding 314, a third winding 516, and a fourth winding 718.
  • the plate 300 comprises four portions 330, 332, 534, 636 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two lines of fold 340, 542.
  • the first fold line 340 extends from the top edge 302d to the bottom edge 302b and the second fold line 542 extends from the left edge 302c to the right edge 302a crossing the first fold line 340, from so as to form the four portions 330, 332, 534, 636.
  • the first portion 330 is positioned to the right of the first fold line 340 and above the second fold line 542.
  • the second portion 332 is positioned to the left of the first fold line 340 and above the second line fold 542.
  • the third portion 534 is positioned to the right of the first fold line 340 and below the second fold line 542.
  • the fourth portion 636 is positioned to the left of the first fold line 340 and below of the second fold line 542.
  • the top edge 302d is substantially parallel to the bottom edge 302b and the second fold line 542, and is substantially perpendicular to the left edge 302c, which is substantially parallel to the right edge 302a and the first fold line 340.
  • the first fold line 340 can extend substantially from the middle of the top edge 302d to the middle of the bottom edge 302b and the second fold line can extend substantially from the middle of the right edge 302a to the middle of the left edge 302c, so that the four portions 330, 332, 534, 636 have substantially the same dimensions.
  • the first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, the third portion 534 comprises the third winding 516 and the fourth portion 636 comprises the fourth winding 718.
  • the two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312.
  • the first winding 312 is connected to the end 308, for example by a link 354. In one example, the link 354 does not pass through a turn 320.
  • the first winding 312 is further connected to the second winding 314, for example by a link 350.
  • the link 350 passes through the first fold line 340.
  • the link 350 comprises for example a part extending substantially between the second fold line 542 and the top edge 302d, this part passing for example through the part of the first line fold 340 between the top edge 302d and the second fold line 542 substantially in its middle.
  • the second winding is further connected to the third winding 516, for example by a link 556.
  • the link 556 crosses the first fold line 340 and the second fold line 542, and can also cross one or more turns 320.
  • the link 556 extends for example from the end of a turn 320 inside the second winding 314 and close to the fold lines 340, 542 (at a minimum of about 500 micrometers), at the start of the outer turn 320 of the third winding 516 near the fold lines 340, 542.
  • the third winding 516 is connected to the fourth winding 718, for example by a link 758.
  • the link 758 crosses the first fold line 340, and can also pass through one or more turns 320.
  • the link 556 extends for example. from the end of a turn 320 inside the third winding 516 and near the fold lines 340, 542, to the start of the outer turn 320 of the fourth winding 718 near the fold lines 340, 542.
  • the fourth winding is further connected to the end 306, for example by a link 352 which crosses the first fold line 340 and the second fold line 542 and can pass through one or more turns 320.
  • the electronic chip 310 can be positioned on the first portion 312 comprising the ends 306, 308.
  • a plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the first fold line 340.
  • two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically. relative to the first fold line 340.
  • a plurality of sections of the third and fourth windings 516, 718 are disposed symmetrically with respect to the first fold line 340.
  • two turns 320, each of one of the two windings 516, 718 may be disposed. symmetrically with respect to the first fold line 340.
  • first and third windings 312, 516 are arranged symmetrically with respect to the second fold line 542.
  • two turns 320, each of one of the two windings 312, 516 can be arranged in parallel. symmetrically with respect to the second fold line 542.
  • each of one of the two windings 314, 718 can be arranged in symmetrically with respect to the second fold line 542.
  • the four windings 312, 314, 516, 718 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516, 718 having substantially the same dimensions and the same positioning on the portion 330, 332, 534, 636 comprising said winding 312, 314, 516, 718 as a turn 320 of the other windings 312, 314, 516, 718 on the other portions 330, 332, 534, 636.
  • the four windings 312, 314, 516, 718 are not arranged symmetrically with respect to the fold lines 340, 542 because, for example, these four windings 312, 314, 516, 718 do not have the same number of turns 320. In one example, only the outer turns 320 are symmetrical.
  • the antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the first portion 330 and the second portion 332, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340.
  • the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340.
  • the current flows counterclockwise in the winding 312, it flows in the opposite direction. clockwise in winding 314. This is in particular permitted by the arrangement of link 350.
  • the antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the third portion 534 and the fourth portion 718, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 516, 718 is symmetrical with respect to the first fold line 340.
  • the direction of current flow in the turns 320 of the windings 516, 718 is symmetrical with respect to the first fold line 340.
  • the current flows clockwise in the winding 516, it flows in the direction counterclockwise in winding 718. This is in particular permitted by the arrangement of link 758.
  • the antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the first portion 330 and the third portion 534, when a current is flowing through the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 516 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the clockwise in winding 516.
  • the antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the second portion 332 and the fourth portion 636, when a current flows through the antenna 304, the direction of flow of the current in the turns 320 of the windings 314, 718 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows clockwise in the winding 314, it flows in the counterclockwise in winding 718.
  • a method for manufacturing a wireless communication module comprising a plurality of superimposed layers is described, for example a method for manufacturing a module as described below.
  • Step 1000 a plate 300 is provided as described above.
  • Step 1000 can comprise steps 1001, 1003 and optionally 1002 and 1004 described below, so as to form a process for manufacturing the plate 300.
  • a substrate is provided, said substrate being delimited by edges.
  • the substrate is for example a substrate 302 according to one of the examples described. previously with reference to figures 3 to 7 .
  • a plate of substrates 1100 comprising several substrates 302 integral with one another is provided (see figure 11 ).
  • a fold line assembly including at least one fold line is formed in the substrate.
  • each fold line is formed by thinning the material of the substrate, or is formed by folding and unfolding the substrate.
  • the substrate is then divided into a plurality of portions delimited by the fold line assembly and the edges of the substrate.
  • an antenna is formed on the substrate, for example on the same face of the substrate.
  • the surface of the antenna is at least partially electrically insulated, and the antenna has two ends adapted to be connected to an electronic chip, and a plurality of windings, each comprising at least one turn.
  • the antenna is formed on the substrate so as to form a plate comprising a plurality of portions bounded by the fold line assembly and the edges of the substrate, at least two of the portions each comprising at least one winding, and the two ends being arranged at the same portion.
  • the antenna and the plate are for example respectively an antenna 304 a plate 300 according to one of the examples described above with reference to figures 3 to 7 .
  • the antenna is deposited on the substrate, for example by continuously depositing a wire on the substrate.
  • the antenna is then fixed to the substrate.
  • the fixing can be carried out by gluing, typically when the antenna is an enamelled metal wire.
  • the antenna is fixed by being incorporated into the substrate, for example by being embedded in the substrate by means of a technique using ultrasound.
  • the electronic chip can then be positioned on the portion comprising the two ends (step 1004).
  • the electronic chip is positioned on a portion of the substrate before step 1003 of forming the antenna, and the two ends are positioned on the portion comprising the electronic chip.
  • the electronic chip is for example an electronic chip 310 according to one of the examples described above with reference to figures 3 to 7 .
  • the formation of the antenna and the positioning of the electronic chip are carried out for each substrate 302 of the plate 1100 (see figure 11 ).
  • a portion not comprising a winding is cut.
  • the portion not comprising a winding is not cut.
  • an adhesive layer is positioned on one side of a portion to be folded over another portion after the folding step 1008 described below.
  • an adhesive layer is positioned on each side to be folded over a portion.
  • the adhesive layer 1102, 1104 can be deposited on a portion of each substrate in a single operation (cf. figure 11 ).
  • the substrate or the plate is folded along the at least one fold line so as to form at least two layers of the plurality of superimposed layers.
  • the plate is folded along a first fold line so as to form two layers, each layer corresponding to at least a portion of the substrate.
  • This first folding of the plate can cause at least a second folding line, present on the two layers, to be folded back on itself.
  • the plate has a second fold line, it is then folded along this second fold line, and so on, until all the portions are stacked on top of each other so as to form a plurality of overlapping layers. .
  • step 1010 the plurality of superimposed layers are laminated, for example directly, without an intermediate layer in order to obtain a fine modulus.
  • the plate is then irreversibly folded.
  • this step 1010 is not carried out. It is thus possible to bend the plate in a reversible manner, and thus to be able to modify the additional capacity obtained by bending the plate differently.
  • the additional capacity obtained is different if the second winding is found after folding between the first and third windings or if the third winding is found after folding between the first and second windings.
  • a wireless communication module 1200 for example made from a plate 300 as described with reference to figures 3 to 7 .
  • the module 1200 is for example obtained from the manufacturing process as described above.
  • the module 1200 comprises a substrate 302, for example a substrate 302 as described previously folded, an electronic chip 310, for example an electronic chip 310 as described previously, and an antenna 304, for example an antenna 304 as described previously.
  • the antenna 304 comprises two ends connected to the electronic chip 310, and a plurality of windings 312, 314, 516, 718, each comprising at least one turn 320, for example a plurality of turns 320.
  • Module 1200 includes a plurality of superimposed layers, with substrate 302 (or plate 300) being folded to form at least two layers 1202, 1204, 1406, 1408 of the plurality of layers. At least two of the layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302 each comprise at least one winding 312, 314, 516, 718 and the two ends are positioned at the same layer 1202, 1204, 1406 , 1408.
  • the layers 1202, 1204, 1406, 1408 formed by the substrate 302 thus correspond to the portions 330, 332, 534, 636 of the plate 300 once the substrate 302 is folded along the fold line assembly.
  • the two ends are positioned on the same face of the same layer 1202, 1204, 1406, 1408 of at least two layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302.
  • windings 312, 314, 516, 718 are arranged so that when a current flows through the antenna 304, the current flows in the same direction in each turn 320, for example clockwise or counterclockwise in top view of a face of a layer 1202, 1204, 1406, 1408 of the module 1200.
  • An insulating layer can be positioned between at least two of the layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302.
  • This layer is made of plastic, for example PVC. This layer makes it possible to adjust the additional capacity.
  • the module 1200 operates at a communication frequency of 13.56 MHz. This frequency is used in communication protocols defined in standards ISO 14443, ISO 15693, ISO 18000-3.
  • At least two sections of two turns 320 of the plurality of windings 312, 314, 516, 718 i.e. one turn of one of the windings 312, 314, 516, 718 and a turn 320 of another winding 312, 314, 516, 718 can be superimposed.
  • superimposed is meant that the sections are substantially aligned along a plane perpendicular to the substrate 302.
  • At least two turns 320 of the plurality of windings 312, 314, 516, 718 are superimposed.
  • the centers of the two turns 320 of the plurality of windings 312, 314, 516, 718 are superimposed.
  • the maximum offset between the projection of the first turn and the second turn is 300 micrometers.
  • At least two windings 312, 314, 516, 718 are superimposed.
  • the centers of the superimposed windings 312, 314, 516, 718 are superimposed.
  • the figure 12 shows a section of a 1200 module made by bending the plate 300 of the figure 3 .
  • the plate 300 of the figure 3 is folded (step 1008) along the fold line 340, so that the windings 312, 314 are separated by the two layers 1202, 1204.
  • the layer 1202 corresponds to the portion 330 and the layer 1204 corresponds to the portion 332.
  • plate 300 of the figure 3 is folded along the fold line 340, so that the windings 312, 314 are sandwiched between the two layers 1202, 1204 (see figure 13 ).
  • the figure 14 shows a section of a 1200 module made by bending the plate 300 of the figure 6 .
  • the plate 300 of the figure 6 is first folded along the first fold line 340, so that the windings 312, 314 are separated by the layers 1202, 1204.
  • the second fold line 542 is then folded back on itself.
  • the plate 300 is folded along the second fold line 542 so that the windings 312, 516 are sandwiched between the layers 1406, 1408 on the one hand and the layers 1202, 1204 on the other hand.
  • Layer 1202 corresponds to portion 330
  • layer 1204 corresponds to portion 332
  • layer 1406 corresponds to layer 636
  • layer 1408 corresponds to layer 534.
  • the plate is folded along the second fold line 542. so that the winding 516 is separated from the winding 314 by the layers 1406, 1408.
  • the plate 300 is folded along the fold line 340, so that the windings 312, 314 are sandwiched between the two layers 1202, 1204. Then, the plate 300 is folded along the second fold line 542 of so that the winding 516 is separated from the winding 314 by the layers 1204, 1406. Alternatively, the plate is folded along the second fold line 542 so that the winding 516 is separated from the winding 312 by the layers. layers 1202, 1408.
  • the figure 15 shows a section of a 1200 module made by bending the plate 300 of the figure 7 .
  • the plate of the figure 7 can be folded in the same way as the plate of the figure 6 when the latter is folded in order to manufacture the module of the figure 14 .

Description

Arrière-plan de l'inventionBackground of the invention

La présente invention porte sur des modules de communication sans fil, par exemple de type RFID (« Radio Frequency ID entity » en terminologie anglo-saxonne). La présente invention porte en outre sur des plaques adaptées pour être utilisées pour la fabrication de tels modules de communication sans fil et sur un procédé de fabrication de tels modules de communication sans fil.The present invention relates to wireless communication modules, for example of the RFID (“Radio Frequency ID entity”) type. The present invention further relates to plates suitable for use in the manufacture of such wireless communication modules and to a method of manufacturing such wireless communication modules.

La technologie RFID est aujourd'hui massivement utilisée dans les applications de paiement, d'identification et d'accès sécurisé.RFID technology is widely used today in payment, identification and secure access applications.

La figure 1 montre un module 100 de communication sans fil comportant un substrat 102 sur lequel sont montés une puce électronique 104 (ou circuit intégré) et une antenne 106. L'antenne 106 prend la forme d'un enroulement 108 comportant au moins une spire 110 de forme générale carrée ou rectangulaire. La spire 110 externe, c'est-à-dire la spire 110 la plus proche du bord du substrat 102, est de dimensions a et b. La puce électronique 104 est capable, à l'aide de l'antenne 106 à laquelle elle est connectée, de communiquer avec un émetteur-récepteur (appelé plus généralement « lecteur »), c'est-à-dire capable de recevoir des requêtes émises depuis cet émetteur-récepteur et de répondre à ces requêtes.The figure 1 shows a wireless communication module 100 comprising a substrate 102 on which are mounted an electronic chip 104 (or integrated circuit) and an antenna 106. The antenna 106 takes the form of a winding 108 comprising at least one turn 110 of the form generally square or rectangular. The outer coil 110, that is to say the coil 110 closest to the edge of the substrate 102, is of dimensions a and b. The electronic chip 104 is capable, using the antenna 106 to which it is connected, of communicating with a transceiver (more generally called a “reader”), that is to say capable of receiving requests. transmitted from this transceiver and respond to these requests.

La figure 2 représente un schéma électrique correspondant au module 100 de communication sans fil de la figure 1. Ce schéma électrique comporte un circuit RLC 200 correspondant à l'antenne 106. Ce circuit RLC 200 comporte une résistance 202 connectée en série avec une bobine 204 et un condensateur 206. Le schéma électrique comporte en outre un circuit RC 210 correspondant au circuit intégré 104. Ce circuit RC 210, connecté en parallèle au circuit RLC 200, comporte une résistance 212 connectée en parallèle à un condensateur 214.The figure 2 represents an electrical diagram corresponding to the wireless communication module 100 of the figure 1 . This electrical diagram comprises an RLC circuit 200 corresponding to the antenna 106. This RLC circuit 200 comprises a resistor 202 connected in series with a coil 204 and a capacitor 206. The electrical diagram also comprises an RC circuit 210 corresponding to the integrated circuit 104 This RC circuit 210, connected in parallel to the RLC circuit 200, comprises a resistor 212 connected in parallel to a capacitor 214.

Les modules de communication sans fil sont souvent incorporés dans des dispositifs portables de petites dimensions, tels que des bracelets, des montres et des porte-clefs. Ces dispositifs portables peuvent comprendre d'autres circuits électroniques et capteurs. L'espace disponible dans ces dispositifs portables pour les modules de communication sans fil est donc réduit, et varie en fonction du dispositif. Il existe ainsi une forte demande pour des modules de communication sans fil de petite taille, pouvant être intégrés dans tout type de dispositif portable.Wireless communication modules are often incorporated into small portable devices, such as bracelets, watches and key chains. These portable devices can include other electronic circuits and sensors. The space available in these portable devices for the wireless communication modules is therefore reduced, and varies depending on the device. There is thus a strong demand for wireless communication modules of small size, which can be integrated into any type of portable device.

Or, la réduction de la taille des modules de communication sans fil constitue un vrai défi, car la communication entre les modules et les lecteurs est régie par des normes, telle que la norme ISO 14443 pour les modules de type RFID haute fréquence. Les antennes doivent ainsi être conçues de sorte que les modules de communication sans fil puissent communiquer à des fréquences de communication définies par ces normes et puissent maintenir les performances de communication définies par ces normes. Or les paramètres physiques de l'antenne, tels que ses dimensions extérieures, intérieures, son nombre de spires ou encore la distance entre deux spires adjacentes, influent sur les valeurs de résistance, d'inductance et de capacité de l'antenne (cf. circuit RLC 200 représenté en figure 2), qui définissent la valeur de la fréquence de communication du module de communication sans fil.However, reducing the size of the wireless communication modules is a real challenge, because the communication between the modules and the readers is governed by standards, such as the ISO 14443 standard for high frequency RFID type modules. The antennas must therefore be designed so that the wireless communication modules can communicate at communication frequencies defined by these standards and can maintain the communication performance defined by these standards. However, the physical parameters of the antenna, such as its external and internal dimensions, its number of turns or the distance between two adjacent turns, influence the resistance, inductance and capacitance values of the antenna (cf. RLC 200 circuit shown in figure 2 ), which define the value of the communication frequency of the wireless communication module.

Il existe des modules de communication sans fil de dimensions réduites, réalisés à partir d'une antenne gravée sur les deux faces d'un substrat. La technologie de gravure, formant un circuit imprimé, est une technologie de grande précision (tolérance de 100 micromètres) permettant d'exploiter une grande proportion de la surface sur laquelle est gravé le métal. De plus, il est possible d'y ajouter une capacité selon le même procédé pour compenser la taille des enroulements.There are wireless communication modules of reduced dimensions, made from an antenna etched on both sides of a substrate. The engraving technology, forming a printed circuit, is a high precision technology (tolerance of 100 micrometers) making it possible to exploit a large proportion of the surface on which the metal is engraved. In addition, it is possible to add a capacity to it according to the same method to compensate for the size of the windings.

Toutefois, le réglage des paramètres de l'antenne est contraint par les seules deux faces du substrat du module et leurs dimensions.However, the adjustment of the antenna parameters is constrained by only the two faces of the module substrate and their dimensions.

Aussi, il existe un besoin pour une solution technologique permettant de pallier notamment les problèmes évoqués ci-dessous, en particulier les problèmes de taille limitée de l'antenne et de maintien des performances de l'antenne.Also, there is a need for a technological solution making it possible in particular to overcome the problems mentioned below, in particular the problems of limited size of the antenna and of maintaining the performance of the antenna.

Le document US 2011/0169702 décrit un module d'antenne pour produire un transpondeur. Le document US 2006/0237544 décrit un circuit d'antenne pour carte ou tag à circuit intégré.The document US 2011/0169702 describes an antenna module for producing a transponder. The document US 2006/0237544 describes an antenna circuit for an integrated circuit card or tag.

Objet et résumé de l'inventionPurpose and summary of the invention

A cet effet, la présente invention prévoit une plaque adaptée pour être utilisée pour la fabrication d'un module de communication sans fil, ladite plaque comprenant :

  • un substrat délimité par des bords,
  • une antenne ayant une surface au moins partiellement isolée électriquement, ladite antenne comprenant :
    • deux extrémités adaptées pour être connectées à une puce électronique, et
    • une pluralité d'enroulements, chacun comportant au moins une spire,
la plaque comprenant une pluralité de portions délimitées par un ensemble de ligne de pliage comprenant au moins une ligne de pliage et les bords du substrat, de sorte que :
  • au moins deux des portions comprennent chacune au moins un enroulement, et
  • les deux extrémités sont disposées au niveau de la même portion, et l'antenne est formée d'un fil continu de matière.
To this end, the present invention provides a plate suitable for use in manufacturing a wireless communication module, said plate comprising:
  • a substrate delimited by edges,
  • an antenna having an at least partially electrically insulated surface, said antenna comprising:
    • two ends adapted to be connected to an electronic chip, and
    • a plurality of windings, each comprising at least one turn,
the plate comprising a plurality of portions delimited by a fold line assembly comprising at least one fold line and the edges of the substrate, so that:
  • at least two of the portions each comprise at least one winding, and
  • the two ends are disposed at the same portion, and the antenna is formed of a continuous wire of material.

L'invention permet de fabriquer un module de communication sans fil ayant une taille limitée et une antenne ayant de bonnes performances.The invention makes it possible to manufacture a wireless communication module having a limited size and an antenna having good performance.

En effet, l'invention offre une grande flexibilité de conception du module de communication. Le module de communication peut ainsi présenter un nombre de configurations très élevé. Le nombre d'enroulements, l'ordre de pliage, l'épaisseur du substrat, l'alignement relatif après pliage des spires d'un enroulement par rapport aux spires d'un autre enroulement peuvent être choisis pour modifier les paramètres de l'antenne, tout en acceptant les contraintes de dimensions du substrat. Il est par exemple possible de prévoir un nombre d'enroulements important, par exemple supérieur à deux.Indeed, the invention offers great flexibility in the design of the communication module. The communication module can thus have a very high number of configurations. The number of windings, the order of folding, the thickness of the substrate, the relative alignment after folding of the turns of one winding relative to the turns of another winding can be chosen to modify the parameters of the antenna. , while accepting the constraints of the dimensions of the substrate. It is for example possible to provide a large number of windings, for example greater than two.

Ainsi, l'invention offre une grande plage de réglage des valeurs de résistance, d'inductance et de capacité de l'antenne ce qui permet d'améliorer les performances de l'antenne.Thus, the invention offers a wide range of adjustment of the resistance, inductance and capacitance values of the antenna, which makes it possible to improve the performance of the antenna.

Par exemple, la disposition d'enroulements sur des portions différentes permet, lorsque la plaque est pliée selon l'ensemble de ligne de pliage afin de former un module de communication sans fil, de créer une capacité additionnelle. Cette capacité additionnelle permet de compenser la faible inductance engendrée par les petites dimensions de l'antenne sans augmenter la résistance, et permet ainsi de régler la valeur de la fréquence de communication du module de communication sans fil sans ajouter de spire supplémentaire.For example, the arrangement of windings on different portions allows, when the plate is folded along the fold line assembly to form a wireless communication module, to create additional capacity. This additional capacity makes it possible to compensate for the low inductance generated by the small dimensions of the antenna without increasing the resistance, and thus makes it possible to adjust the value of the communication frequency of the wireless communication module without adding an additional turn.

En outre, l'invention permet de s'affranchir des problèmes de tolérance de fabrication. En effet, le nombre d'enroulement n'étant plus limité, il est possible de ne pas utiliser toute la surface utile du substrat pour la formation des spires des enroulements. Les dimensions de la spire périphérique peuvent aussi être réduites.In addition, the invention makes it possible to overcome the problems of manufacturing tolerance. As the number of windings is no longer limited, it is possible not to use the entire useful surface of the substrate for forming the turns of the windings. The dimensions of the peripheral coil can also be reduced.

En outre, la disposition de l'antenne et notamment des extrémités de l'antenne simplifie la fabrication de la plaque, et donc du module de communication pour lequel la plaque est utilisée. Cette disposition permet par exemple de se passer d'un deuxième substrat utilisé pour connecter la puce électronique aux extrémités de l'antenne, ou encore d'opérations de perçage d'orifices dans un substrat afin de positionner l'antenne des deux côtés du substrat. La disposition des deux extrémités de l'antenne permet de facilement connecter électriquement les deux extrémités à la puce électronique.In addition, the arrangement of the antenna and in particular of the ends of the antenna simplifies the manufacture of the plate, and therefore of the communication module for which the plate is used. This arrangement makes it possible, for example, to dispense with a second substrate used to connect the electronic chip to the ends of the antenna, or even operations for drilling holes in a substrate in order to position the antenna on both sides of the substrate. . The arrangement of the two ends of the antenna makes it possible to easily electrically connect the two ends to the electronic chip.

L'isolation électrique d'au moins une partie de la surface de l'antenne facilite le positionnement de l'antenne. En particulier, les liaisons entre deux enroulements ou entre un enroulement et une extrémité peuvent traverser des spires d'enroulement sans créer de courts-circuits, car il n'y a pas de contact électrique au point de croisement de la spire et de la liaison. De grandes libertés sont ainsi offertes en ce qui concerne le design de l'antenne, ce qui permet de positionner aisément les deux extrémités sur une même portion de plaque, par exemple à l'intérieur d'un même enroulement.The electrical insulation of at least part of the antenna surface facilitates the positioning of the antenna. In particular, the connections between two windings or between a winding and one end can pass through winding turns without creating short circuits, because there is no electrical contact at the point of intersection of the turn and the connection. . Great liberties are thus offered as regards the design of the antenna, which makes it possible to easily position the two ends on the same portion of the plate, for example within the same winding.

Selon un mode de réalisation particulier, la plaque est adapté pour être utilisée pour la fabrication d'un module tel que décrit ci-après.According to a particular embodiment, the plate is suitable for use in the manufacture of a module as described below.

Selon un mode de réalisation particulier, le substrat présente des dimensions inférieures ou égales au quart du format ID-1.According to a particular embodiment, the substrate has dimensions less than or equal to a quarter of the ID-1 format.

L'invention est en effet particulièrement intéressante pour les modules de communication de petite taille.The invention is in fact particularly advantageous for small-sized communication modules.

Selon un mode de réalisation particulier, l'antenne présente sur toute sa longueur la même constitution.According to a particular embodiment, the antenna has the same construction over its entire length.

Selon un mode de réalisation particulier, les enroulements sont formés sur une même face du substrat.According to a particular embodiment, the windings are formed on the same face of the substrate.

La formation de la pluralité d'enroulements sur une même face du substrat facilite et augmente la rapidité de la fabrication de la plaque, et donc du module de communication sans fil.The formation of the plurality of windings on the same face of the substrate facilitates and increases the speed of the manufacture of the plate, and therefore of the wireless communication module.

Selon un mode de réalisation particulier, l'antenne est incorporée dans le substrat.According to a particular embodiment, the antenna is incorporated in the substrate.

Selon un mode de réalisation particulier, les deux extrémités sont positionnées à l'intérieur d'un même enroulement de la pluralité d'enroulement.According to a particular embodiment, the two ends are positioned inside the same winding of the plurality of windings.

Selon un mode de réalisation particulier, pour au moins une ligne de pliage de l'ensemble de ligne de pliage, deux spires de la pluralité d'enroulements sont disposées de manière sensiblement symétrique par rapport à ladite ligne de pliage.According to a particular embodiment, for at least one fold line of the fold line assembly, two turns of the plurality of windings are arranged substantially symmetrically with respect to said fold line.

Selon un mode de réalisation particulier, pour chaque ligne de pliage de l'ensemble de ligne de pliage séparant deux portions comportant chacune un enroulement, lorsqu'un courant circule dans l'antenne, le sens de circulation du courant dans les spires desdits enroulements est symétrique par rapport à ladite ligne de pliage.According to a particular embodiment, for each fold line of the fold line assembly separating two portions each comprising a winding, when a current flows in the antenna, the direction of flow of the current in the turns of said windings is symmetrical with respect to said fold line.

La symétrie du sens de circulation du courant permet, lorsque la plaque est pliée selon l'ensemble de ligne de pliage afin de fabriquer un module de communication sans fil, que lorsqu'un courant circule dans l'antenne, le courant circule dans le même sens dans chaque spire. La circulation du courant dans le même sens dans chaque spire de l'antenne permet d'additionner les flux de champ magnétique passant par les différents enroulements et donc d'augmenter le courant induit dans l'antenne.The symmetry of the direction of current flow allows, when the plate is folded according to the fold line assembly in order to manufacture a wireless communication module, that when a current flows through the antenna, the current flows in the same sense in each turn. The flow of current in the same direction in each turn of the antenna makes it possible to add the magnetic field fluxes passing through the various windings and therefore to increase the current induced in the antenna.

Selon un mode de réalisation particulier, au moins une portion comprend un enroulement ayant une spire suivant le contour de ladite portion.According to a particular embodiment, at least one portion comprises a winding having a turn following the contour of said portion.

Selon un mode de réalisation particulier, la distance minimale entre deux spires d'un même enroulement est de 100 micromètres.According to a particular embodiment, the minimum distance between two turns of the same winding is 100 micrometers.

Ainsi, les dimensions du module fabriqué à partir de la plaque sont réduites, et le module peut être incorporé dans des dispositifs portables de petites dimensions.Thus, the dimensions of the module made from the plate are reduced, and the module can be incorporated into portable devices of small dimensions.

Selon un mode de réalisation particulier, la plaque comporte au moins trois portions comprenant chacune un enroulement.According to a particular embodiment, the plate comprises at least three portions each comprising a winding.

L'invention vise également un module de communication sans fil comprenant :

  • un substrat,
  • une puce électronique,
  • une antenne ayant une surface au moins partiellement isolée électriquement, ladite antenne comprenant :
    • deux extrémités connectées à la puce électronique, et
    • une pluralité d'enroulements, chacun comportant au moins une spire,
      dans lequel :
      • le module comprend une pluralité de couches superposées, le substrat étant plié de sorte à former au moins deux couches de la pluralité de couches,
      • au moins deux des couches formées par le pliage dudit substrat comprennent chacune au moins un enroulement, et
      • les deux extrémités sont positionnées au niveau d'une même couche.
The invention also relates to a wireless communication module comprising:
  • a substrate,
  • an electronic chip,
  • an antenna having an at least partially electrically insulated surface, said antenna comprising:
    • two ends connected to the electronic chip, and
    • a plurality of windings, each comprising at least one turn,
      in which :
      • the module comprises a plurality of superimposed layers, the substrate being folded so as to form at least two layers of the plurality of layers,
      • at least two of the layers formed by the folding of said substrate each comprise at least one winding, and
      • the two ends are positioned at the same layer.

Selon un mode de réalisation particulier, le module est fabriqué à partir de la plaque telle que décrite précédemment. Le substrat et l'antenne du module correspondent respectivement au substrat et à l'antenne de ladite plaque, le substrat ayant été plié.According to a particular embodiment, the module is made from the plate as described above. The substrate and the antenna of the module correspond respectively to the substrate and to the antenna of said plate, the substrate having been folded.

Selon un mode de réalisation particulier, les enroulements sont agencés de sorte que lorsqu'un courant circule dans l'antenne, le courant circule dans le même sens dans chaque spire.According to a particular embodiment, the windings are arranged so that when a current flows in the antenna, the current flows in the same direction in each turn.

Selon un mode de réalisation particulier, une couche isolante est positionnée entre au moins deux des couches formées par le pliage dudit substrat.According to a particular embodiment, an insulating layer is positioned between at least two of the layers formed by the folding of said substrate.

Selon un mode de réalisation particulier, le module fonctionne à une fréquence de communication de 13,56 MHz.According to a particular embodiment, the module operates at a communication frequency of 13.56 MHz.

Selon un mode de réalisation particulier, deux spires de la pluralité d'enroulements sont superposées.According to a particular embodiment, two turns of the plurality of windings are superimposed.

L'invention prévoit également un procédé de fabrication d'un module de communication sans fil comprenant une pluralité de couches superposées, ledit procédé comprenant :

  • la fourniture d'une plaque telle que décrite ci-dessus,
  • le positionnement de la puce électronique sur la portion comportant les deux extrémités, et
  • le pliage de la plaque selon l'au moins une ligne de pliage de sorte à former au moins deux couches de la pluralité de couches superposées.
The invention also provides a method of manufacturing a wireless communication module comprising a plurality of superimposed layers, said method comprising:
  • the supply of a plate as described above,
  • the positioning of the electronic chip on the portion comprising the two ends, and
  • folding the plate along the at least one fold line so as to form at least two layers of the plurality of superimposed layers.

Selon un mode de réalisation particulier, le procédé est un procédé de fabrication du module décrit précédemment.According to a particular embodiment, the method is a method for manufacturing the module described above.

Selon un mode de réalisation particulier, le procédé comprend en outre la lamination de la pluralité de couches superposées.According to a particular embodiment, the method further comprises the lamination of the plurality of superimposed layers.

Selon un mode de réalisation particulier, l'étape de fourniture comprend une étape de formation d'une antenne comprenant un dépôt en continu du fil sur le substrat.According to a particular embodiment, the supply step comprises a step of forming an antenna comprising a continuous deposition of the wire on the substrate.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-dessous, en référence aux dessins annexés qui en illustrent des exemples de réalisation dépourvus de tout caractère limitatif. Sur les figures:

  • la figure 1 déjà décrite est une vue de dessus représentant schématiquement un exemple de module de communication sans fil conventionnel ;
  • la figure 2 est un schéma électrique correspondant au module de communication sans fil illustré en figure 1 ;
  • les figures 3 à 7 sont des vues de dessus représentant schématiquement des plaques adaptées pour être utilisées pour la fabrication de modules de communication sans fil conformes à des exemples de modes de réalisation de l'invention ;
  • les figures 8A, 8B et 8C représentent schématiquement la disposition d'enroulements et de liaisons de plaques conformes à des exemples de modes de réalisation de l'invention ;
  • les figures 9A et 9B représentent schématiquement la disposition d'enroulements et de liaisons de plaques non conformes à l'invention ;
  • la figure 10 représente, sous la forme d'un organigramme, les principales étapes d'un procédé de fabrication d'un module de communication sans fil conforme à un exemple de mode de réalisation de l'invention ;
  • la figure 11 est une vue de dessus représentant schématiquement une plaque de substrats adaptée pour être utilisée pour la fabrication de modules de communication sans fil conformes à un exemple de mode de réalisation de l'invention ;
  • les figures 12 à 15 sont des vues en coupe représentant schématiquement des modules de communication sans fil conformes à des exemples de modes de réalisation de l'invention ;
  • la figure 16 est un schéma électrique correspondant aux modules de communication sans fil illustrés aux figures 12 à 15.
Other characteristics and advantages of the present invention will emerge from the description given below, with reference to the appended drawings which illustrate exemplary embodiments thereof without any limiting nature. In the figures:
  • the figure 1 already described is a top view schematically showing an example of a conventional wireless communication module;
  • the figure 2 is an electrical diagram corresponding to the wireless communication module illustrated in figure 1 ;
  • the figures 3 to 7 are top views schematically showing plates suitable for use in manufacturing wireless communication modules according to exemplary embodiments of the invention;
  • the figures 8A, 8B and 8C schematically show the arrangement of windings and plate connections in accordance with exemplary embodiments of the invention;
  • the figures 9A and 9B schematically show the arrangement of windings and plate connections not in accordance with the invention;
  • the figure 10 represents, in the form of a flowchart, the main steps of a method of manufacturing a wireless communication module according to an exemplary embodiment of the invention;
  • the figure 11 is a top view schematically showing a plate of substrates suitable for use in the manufacture of wireless communication modules according to an exemplary embodiment of the invention;
  • the figures 12 to 15 are sectional views schematically showing wireless communication modules according to exemplary embodiments of the invention;
  • the figure 16 is an electrical diagram corresponding to the wireless communication modules shown in figures 12 to 15 .

Description détaillée de plusieurs modes de réalisationDetailed description of several embodiments

La présente invention porte sur des modules de communication sans fil, par exemple de type RFID (« Radio Frequency ID entity » en terminologie anglo-saxonne). La présente invention porte en outre sur des plaques adaptées pour être utilisées pour la fabrication de tels modules de communication sans fil et sur un procédé de fabrication de tels modules de communication sans fil.The present invention relates to wireless communication modules, for example of the RFID (“Radio Frequency ID entity”) type. The present invention further relates to plates suitable for use in the manufacture of such wireless communication modules and to a method of manufacturing such wireless communication modules.

En référence aux figures 3 , 4 , 5 , 6 et 7 , il est décrit une plaque 300 comprenant un substrat 302 délimité par des bords 302a, 302b, 302c, 302d, et une antenne 304 ayant une surface au moins partiellement isolée électriquement.With reference to figures 3 , 4 , 5 , 6 and 7 , there is described a plate 300 comprising a substrate 302 delimited by edges 302a, 302b, 302c, 302d, and an antenna 304 having a surface at least partially electrically isolated.

L'antenne 304 comprend deux extrémités 306, 308 adaptées pour être connectées à une puce électronique 310, et une pluralité d'enroulements 312, 314, 516, 718, chacun comportant au moins une spire 320, par exemple une pluralité de spires 320. Les enroulements 312, 314, 516, 718, peuvent avoir le même nombre de spire ou un nombre de spire différent. La forme générale des spires 320 est par exemple carrée ou rectangulaire.The antenna 304 comprises two ends 306, 308 adapted to be connected to an electronic chip 310, and a plurality of windings 312, 314, 516, 718, each comprising at least one turn 320, for example a plurality of turns 320. The windings 312, 314, 516, 718, can have the same number of turns or a different number of turns. The general shape of the turns 320 is for example square or rectangular.

La plaque 300 comprend une pluralité de portions 330, 332, 534, 636 délimitées par un ensemble de ligne de pliage comprenant au moins une ligne de pliage 340, 510 et par les bords 302a, 302b, 302c, 302d du substrat 302, de sorte qu'au moins deux des portions 330, 332, 534, 636 comprennent chacune au moins un enroulement 312, 314, 516, 718, et que les deux extrémités 306, 308 sont disposées au niveau de la même portion 330.The plate 300 comprises a plurality of portions 330, 332, 534, 636 delimited by a fold line assembly comprising at least one fold line 340, 510 and by the edges 302a, 302b, 302c, 302d of the substrate 302, so that at least two of the portions 330, 332, 534, 636 each comprise at least one winding 312, 314, 516, 718, and that the two ends 306, 308 are arranged at the same portion 330.

La disposition d'enroulements 312, 314, 516, 718 sur des portions 330, 332, 534, 636 différentes permet, lorsque la plaque 300 est pliée selon l'ensemble de ligne de pliage afin de fabriquer un module de communication sans fil, de créer une capacité additionnelle. Chaque spire 320 d'un enroulement 312, 314, 516, 718 en vis-à-vis d'une spire 320 d'un autre enroulement 312, 314, 516, 718 lorsque la plaque 300 est pliée créant une capacité individuelle, la capacité additionnelle est égale à la somme des capacités individuelles. Cette capacité additionnelle permet de compenser la faible inductance engendrée par les petites dimensions de l'antenne.The arrangement of windings 312, 314, 516, 718 on different portions 330, 332, 534, 636 allows, when the plate 300 is folded along the fold line assembly in order to manufacture a wireless communication module, to create additional capacity. Each turn 320 of a winding 312, 314, 516, 718 facing a turn 320 of another winding 312, 314, 516, 718 when the plate 300 is folded creating an individual capacity, the capacity additional is equal to the sum of the individual capacities. This additional capacity makes it possible to compensate for the low inductance generated by the small dimensions of the antenna.

En effet, une capacité est formée entre deux fils s'étendant parallèlement et traversés par un courant. L'empilement des couches formées par les portions 330, 332, 534, 636, comportant des enroulements 312, 314, 516, 718 formés à partir de fil conducteur, permet de réaliser une capacité additionnelle au travers de l'épaisseur du substrat 302. La distance, le diamètre du fil et le matériau séparant les fils influencent la valeur de la capacité additionnelle.In fact, a capacitor is formed between two wires extending in parallel and traversed by a current. The stack of layers formed by the portions 330, 332, 534, 636, comprising windings 312, 314, 516, 718 formed from conductive wire, makes it possible to achieve an additional capacity through the thickness of the substrate 302. The distance, wire diameter and the material separating the wires influence the value of the additional capacitance.

Pour une plaque ayant deux portions chacune comprenant un enroulement ayant chacun trois spires, la plus grande spire ayant des dimensions de 27 millimètres par 27 millimètres, la capacité additionnelle créée lors du pliage de la plaque peut être de vingt picofarads.For a plate having two portions each comprising a winding each having three turns, the larger turn having dimensions of 27 millimeters by 27 millimeters, the additional capacity created during the folding of the plate may be twenty picofarads.

La figure 16 représente un schéma électrique correspondant à un module fabriqué à partir du pliage d'une plaque 300. Ce schéma électrique comporte un circuit RLC 1600 correspondant à l'antenne 304. Ce circuit RLC 1600 comporte une résistance 1602 connectée en série avec une bobine 1604 et un condensateur 1606. Un condensateur additionnel 1607, représentant la capacité additionnelle, est connecté en parallèle aux bornes du condensateur 1606. Le schéma électrique comporte en outre un circuit RC 1610 correspondant à la puce électronique 310. Ce circuit RC 1610, connecté en parallèle aux bornes du condensateur additionnel 1607, comporte une résistance 1612 connectée en parallèle à un condensateur 1614.The figure 16 represents an electrical diagram corresponding to a module made from the folding of a plate 300. This electrical diagram comprises an RLC 1600 circuit corresponding to the antenna 304. This RLC 1600 circuit comprises a resistor 1602 connected in series with a coil 1604 and a capacitor 1606. An additional capacitor 1607, representing the additional capacitance, is connected in parallel across the terminals of the capacitor 1606. The electric diagram further includes an RC 1610 circuit corresponding to the electronic chip 310. This RC 1610 circuit, connected in parallel to the terminals of the additional capacitor 1607, has a resistor 1612 connected in parallel to a capacitor 1614.

En outre, la disposition de l'antenne 304 et notamment des extrémités 306, 308 de l'antenne 304 simplifie la fabrication de la plaque 300, et donc du module de communication pour lequel la plaque 300 est utilisée. Cette disposition permet par exemple de se passer d'un deuxième substrat utilisé pour connecter la puce électronique aux extrémités de l'antenne, ou encore d'opérations de perçage d'orifices dans un substrat afin de positionner l'antenne des deux côtés du substrat.In addition, the arrangement of the antenna 304 and in particular of the ends 306, 308 of the antenna 304 simplifies the manufacture of the plate 300, and therefore of the communication module for which the plate 300 is used. This arrangement makes it possible, for example, to dispense with a second substrate used to connect the electronic chip to the ends of the antenna, or even operations for drilling holes in a substrate in order to position the antenna on both sides of the substrate. .

Le substrat 302 est en forme de plaque, comportant par exemple deux faces opposées et quatre bords 302a, 302b, 302c, 302d reliant lesdites faces opposées. Dans un exemple, les faces opposées sont de forme carrée ou rectangulaire. Les portions 330, 332, 534, 636, suivant le positionnement de la ou les lignes de pliage 340, 542, peuvent ainsi avoir une surface carrée ou rectangulaire, et avoir les mêmes dimensions. En outre, le substrat 302 peut être en plastique, par exemple en PVC (Polychlorure de vinyle), ou encore en PET (Polytéréphtalate d'éthylène).The substrate 302 is in the form of a plate, comprising for example two opposite faces and four edges 302a, 302b, 302c, 302d connecting said opposite faces. In one example, the opposite faces are square or rectangular in shape. The portions 330, 332, 534, 636, depending on the positioning of the fold line or lines 340, 542, can thus have a square or rectangular surface, and have the same dimensions. In addition, the substrate 302 can be plastic, for example PVC (polyvinyl chloride), or else PET (polyethylene terephthalate).

Dans un exemple, les dimensions du substrat 302 sont inférieures ou égales au quart du format ID-1 (85,6 millimètres par 53,98 millimètres) défini par la norme ISO 7810.In one example, the dimensions of the substrate 302 are less than or equal to a quarter of the ID-1 format (85.6 millimeters by 53.98 millimeters) defined by the ISO 7810 standard.

Chaque ligne de pliage 340, 542 peut être formée par amincissement de la matière du substrat 302, ou par pliage et dépliage du substrat 302.Each fold line 340, 542 can be formed by thinning the material of the substrate 302, or by folding and unfolding the substrate 302.

Afin d'assurer le fonctionnement de l'antenne 304, les enroulements 312, 314, 516, 718 et les extrémités 306, 308 de l'antenne 304 sont connectés électriquement en série entre eux. Plus précisément, chaque enroulement 312, 314, 516, 718 est connecté à une extrémité 306, 308 et un autre enroulement 312, 314, 516, 718 ou est connecté à deux autres enroulements 312, 314, 516, 718.In order to ensure the operation of the antenna 304, the windings 312, 314, 516, 718 and the ends 306, 308 of the antenna 304 are electrically connected in series with each other. Specifically, each winding 312, 314, 516, 718 is connected to a end 306, 308 and another winding 312, 314, 516, 718 or is connected to two other windings 312, 314, 516, 718.

La connexion entre un enroulement 312, 314, 516, 718 et un autre enroulement 312, 314, 516, 718 ou une extrémité 306, 308 est assurée par une liaison 350, 352, 354, 556, 758. La liaison 350, 352, 354, 556, 758 est par exemple un élément conducteur s'étendant entre deux enroulements 312, 314, 516, 718 ou entre un enroulement 312, 314, 516, 718 et une extrémité 306, 308. Alternativement, la liaison 350, 352, 354, 556, 758 est par exemple une section commune à deux enroulements 312, 314, 516, 718. La liaison 350, 352, 354, 556, 758 connectant deux enroulements 312, 314, 516, 718 traverse une ligne de pliage 340, 510.The connection between a winding 312, 314, 516, 718 and another winding 312, 314, 516, 718 or an end 306, 308 is provided by a link 350, 352, 354, 556, 758. The link 350, 352, 354, 556, 758 is for example a conductive element extending between two windings 312, 314, 516, 718 or between a winding 312, 314, 516, 718 and one end 306, 308. Alternatively, the link 350, 352, 354, 556, 758 is for example a section common to two windings 312, 314, 516, 718. The link 350, 352, 354, 556, 758 connecting two windings 312, 314, 516, 718 crosses a fold line 340, 510.

Dans un exemple, l'antenne 304 présente sur toute sa longueur la même constitution, c'est-à-dire la même composition de matières.In one example, the antenna 304 has the same constitution over its entire length, that is to say the same composition of matter.

L'antenne 304 est formée par un élément conducteur, par exemple un fil métallique. Le matériau de cet élément conducteur est par exemple du cuivre. Les enroulements 312, 314, 516, 718 et les liaisons 350, 352, 354, 556, 758 sont alors formés à partir du même fil métallique, et les extrémités 306, 308 de l'antenne 304 sont les deux extrémités du fil métallique.The antenna 304 is formed by a conductive element, for example a metal wire. The material of this conductive element is for example copper. The windings 312, 314, 516, 718 and the links 350, 352, 354, 556, 758 are then formed from the same metal wire, and the ends 306, 308 of the antenna 304 are the two ends of the metal wire.

En variante, l'antenne 304 est formée par une pluralité d'éléments conducteurs, par exemple une pluralité de fils métalliques tels que le fil métallique décrit ci-dessus. Chaque enroulement 312, 314, 516, 718 peut alors être formé par un fil métallique différent, et être connecté en série avec un autre enroulement 312, 314, 516, 718 et une extrémité 306, 308, ou connecté en série avec deux autres enroulements 312, 314, 516, 718 notamment au moyen des liaisons 350, 352, 354, 556, 758.As a variant, the antenna 304 is formed by a plurality of conductive elements, for example a plurality of metal wires such as the metal wire described above. Each winding 312, 314, 516, 718 can then be formed by a different metal wire, and be connected in series with another winding 312, 314, 516, 718 and one end 306, 308, or connected in series with two other windings 312, 314, 516, 718 in particular by means of links 350, 352, 354, 556, 758.

L'antenne 304 est alors formée d'un fil continu de matière ou d'un ensemble d'éléments conducteurs connectés physiquement entre eux et qui se succèdent les uns aux autres de sorte que l'intégralité de l'antenne 304 soit montée sur le substrat 302, par exemple sur la même face du substrat 302.The antenna 304 is then formed of a continuous wire of material or of a set of conductive elements physically connected to each other and which follow one another so that the entire antenna 304 is mounted on the substrate 302, for example on the same face of substrate 302.

La surface externe de l'antenne 304 est par exemple au moins partiellement isolée électriquement, par exemple isolée électriquement. Dans l'exemple où l'antenne 304 est formée par un fil métallique, le fil métallique peut à cet effet comporter une gaine en matériau isolant sur une partie ou la totalité de sa longueur, ou être un fil métallique émaillé, par exemple par une couche de plastique (e.g. du polyuréthane).The external surface of the antenna 304 is for example at least partially electrically isolated, for example electrically isolated. In the example where the antenna 304 is formed by a metal wire, the metal wire may for this purpose comprise a sheath of insulating material over part or all of its length, or be an enamelled metal wire, for example by a plastic layer (eg polyurethane).

L'isolation électrique de la surface de l'antenne 304 facilite le positionnement de l'antenne 304. En particulier, les liaisons 350, 352, 354, 556, 758 peuvent traverser des spires 320 d'enroulement 312, 314, 516, 718 sans créer de courts-circuits, car il n'y a pas de contact électrique au point de croisement de la spire 320 et de la liaison 350, 352, 354, 556, 758. De grandes libertés sont ainsi offertes en ce qui concerne le design de l'antenne 304, ce qui permet de positionner aisément les deux extrémités 306, 308 sur une même portion 330, 332, 534, 636 de plaque 300, par exemple à l'intérieur d'un même enroulement 312, 314, 516, 718.The electrical insulation of the surface of the antenna 304 facilitates the positioning of the antenna 304. In particular, the links 350, 352, 354, 556, 758 can pass through the winding turns 320 312, 314, 516, 718. without creating short circuits, because there is no electrical contact at the point of intersection of the coil 320 and the link 350, 352, 354, 556, 758. Great liberties are thus offered as regards the design of the antenna 304, which makes it possible to easily position the two ends 306, 308 on the same portion 330, 332, 534, 636 of plate 300 , for example inside the same winding 312, 314, 516, 718.

Dans un exemple, l'antenne 304 est positionnée sur le substrat 302. Plus précisément, les deux extrémités 306, 308 peuvent être disposées au niveau de la même face de la même portion 330. Les enroulements 312, 314, 516, 718 ou toute l'antenne 304 peuvent être positionnés sur une même face du substrat 302. Ainsi, la production de la plaque 300 et donc du module de communication pour lequel la plaque 300 est utilisée est facilitée. En variante, les enroulements 312, 314, 516, 718 ne sont pas tous positionnés sur une même face du substrat 302.In one example, the antenna 304 is positioned on the substrate 302. More precisely, the two ends 306, 308 can be arranged at the same face of the same portion 330. The windings 312, 314, 516, 718 or any the antenna 304 can be positioned on the same face of the substrate 302. Thus, the production of the plate 300 and therefore of the communication module for which the plate 300 is used is facilitated. As a variant, the windings 312, 314, 516, 718 are not all positioned on the same face of the substrate 302.

Dans l'exemple où l'antenne 304 est un fil métallique émaillé, le fil est fixé sur une face du substrat 302, par exemple par des points de collage. La fixation de l'antenne 304 est ensuite améliorée lors d'une lamination qui sera décrite ultérieurement.In the example where the antenna 304 is an enameled metal wire, the wire is fixed to one face of the substrate 302, for example by gluing points. The attachment of the antenna 304 is then improved during a lamination which will be described later.

Dans un autre exemple, l'antenne 304 est partiellement incorporée dans le substrat 302. Plus précisément, l'antenne 304 est partiellement incorporée dans le substrat 302, au niveau de la même face du substrat 302. Dans l'exemple où l'antenne 304 est un fil métallique gainé, le fil métallique peut être incrusté dans le substrat 302 au moyen d'une technique utilisant des ultrasons. Le fil est par exemple incrusté jusqu'à environ la moitiée de son diamètre.In another example, the antenna 304 is partially incorporated into the substrate 302. More precisely, the antenna 304 is partially incorporated into the substrate 302, at the same face of the substrate 302. In the example where the antenna 304 is a sheathed metal wire, the metal wire can be embedded in the substrate 302 by means of a technique using ultrasound. The wire is for example encrusted up to about half of its diameter.

En outre, au moins l'une des portions 330, 332, 534, 636 de la plaque 300 peut comprendre un enroulement 312, 314, 516, 718 ayant une spire 320 suivant le contour de ladite portion 330, 332, 534, 636, c'est-à-dire suivant les bords 302a, 302b, 302c, 302d et l'au moins une ligne de pliage 340, 542 définissant la portion 330, 332, 534, 636. L'enroulement 312, 314, 516, 718 comprend ainsi une spire 320 externe (ou périphérique) positionnée près du contour de ladite portion 330, 332, 534, 636 de sorte à délimiter, en vue de dessus de la plaque 300, une surface ayant des dimensions qui soient les plus grandes possible. Par spire externe, ou spire périphérique, on entend la spire 320 de l'enroulement 312, 314, 516, 718 la plus proche des bords 302a, 302b, 302c, 302d du substrat 302 et de la ligne de pliage 340, 542 définissant la portion 330, 332, 534, 636 comprenant la spire 320. Dans un exemple, les tolérances de fabrication impliquent que la spire 320 externe est positionnée à environ plus de 500 micromètres du contour de la portion 330, 332, 534, 636.In addition, at least one of the portions 330, 332, 534, 636 of the plate 300 may include a winding 312, 314, 516, 718 having a turn 320 following the contour of said portion 330, 332, 534, 636, that is to say along the edges 302a, 302b, 302c, 302d and the at least one fold line 340, 542 defining the portion 330, 332, 534, 636. The winding 312, 314, 516, 718 thus comprises an outer (or peripheral) turn 320 positioned near the contour of said portion 330, 332, 534, 636 so as to delimit, in top view of the plate 300, a surface having dimensions which are as large as possible. By external turn, or peripheral turn, is meant the turn 320 of the winding 312, 314, 516, 718 closest to the edges 302a, 302b, 302c, 302d of the substrate 302 and to the fold line 340, 542 defining the portion 330, 332, 534, 636 including turn 320. In one example, manufacturing tolerances imply that outer turn 320 is positioned approximately more than 500 microns from the contour of portion 330, 332, 534, 636.

Dans un exemple, les dimensions de la spire 320 externe sont égales à un quart des dimensions maximum d'une antenne « Class 1 », les dimensions maximum étant définies par la norme ISO 14443 comme étant 81 millimètres par 49 millimètres.In one example, the dimensions of the outer coil 320 are equal to a quarter of the maximum dimensions of a “Class 1” antenna, the maximum dimensions being defined by the ISO 14443 standard as being 81 millimeters by 49 millimeters.

Dans un exemple, la distance minimale entre deux spires 320 d'un même enroulement 312, 314 est de 100 micromètres. Ainsi, les dimensions du module fabriqué à partir de la plaque 300 sont réduites, et le module peut être incorporé dans des dispositifs portables de petites dimensions.In one example, the minimum distance between two turns 320 of the same winding 312, 314 is 100 micrometers. Thus, the dimensions of the module made from the plate 300 are reduced, and the module can be incorporated into portable devices of small dimensions.

Pour au moins une ligne de pliage 340, 542 de l'ensemble de ligne de pliage, deux sections de deux spires 320 ou deux spires 320 de la pluralité d'enroulements 312, 314, 516, 718 peuvent être disposées de manière symétrique par rapport à cette ligne de pliage 340, 542. Lesdites deux spires 320 sont par exemple deux spires 320 externes de deux enroulements 312, 314, 516, 718 positionnés sur deux portions 330, 332, 534, 636 séparées par une ligne de pliage 340, 542. Alternativement ou en complément, pour au moins une ligne de pliage 340, 542 de l'ensemble de ligne de pliage, les enroulements 312, 314, 516, 718 peuvent être disposés de manière symétrique par rapport à cette ligne de pliage 340, 542.For at least one fold line 340, 542 of the fold line assembly, two sections of two turns 320 or two turns 320 of the plurality of windings 312, 314, 516, 718 can be arranged symmetrically with respect to each other. to this fold line 340, 542. Said two turns 320 are for example two outer turns 320 of two windings 312, 314, 516, 718 positioned on two portions 330, 332, 534, 636 separated by a fold line 340, 542 Alternatively or in addition, for at least one fold line 340, 542 of the fold line assembly, the windings 312, 314, 516, 718 can be arranged symmetrically with respect to this fold line 340, 542 .

Pour chaque ligne de pliage 340, 542 de l'ensemble de ligne de pliage séparant deux portions 330, 332, 534, 636 qui seront superposées directement l'une sur l'autre après le pliage de la plaque 300 et comportant chacune un enroulement 312, 314, 516, 718, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 desdits enroulements 312, 314, 516, 718 est symétrique par rapport à ladite ligne de pliage 340, 542.For each fold line 340, 542 of the fold line assembly separating two portions 330, 332, 534, 636 which will be superimposed directly on one another after the folding of the plate 300 and each having a winding 312 , 314, 516, 718, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of said windings 312, 314, 516, 718 is symmetrical with respect to said fold line 340, 542.

Les figures 8A, 8B et 8C sont des schémas montrant comment les enroulements 312, 314, 516, 718 peuvent être disposés et reliés par les liaisons 350, 556, 758 sur le substrat 302 afin que, pour chaque ligne de pliage 340, 542 de l'ensemble de ligne de pliage séparant deux portions comportant chacune un enroulement 312, 314, 516, 718, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 desdits enroulements 312, 314, 516, 718 est symétrique par rapport à ladite ligne de pliage 340, 542. Ces figures 8A, 8B et 8C montrent des enroulements 312, 314, 516, 718 comportant une spire et formant une partie de l'antenne. Ces figures ne montrent pas l'intégralité de l'antenne, en particulier pas les extrémités des antennes. On comprendra cependant que des enroulements comportant une pluralité de spires et les extrémités des antennes n'ont pas été représentés uniquement pour des raisons de lisibilité.The figures 8A, 8B and 8C are diagrams showing how the windings 312, 314, 516, 718 can be arranged and connected by the links 350, 556, 758 on the substrate 302 so that for each fold line 340, 542 of the fold line assembly separating two portions each comprising a winding 312, 314, 516, 718, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of said windings 312, 314, 516, 718 is symmetrical with respect to said fold line 340, 542. These figures 8A, 8B and 8C show windings 312, 314, 516, 718 comprising a turn and forming part of the antenna. These figures do not show the entire antenna, in particular not the ends of the antennas. However, it will be understood that windings comprising a plurality of turns and the ends of the antennas have not been shown solely for reasons of readability.

La symétrie du sens de circulation du courant permet, lorsque la plaque 300 est pliée selon l'ensemble de ligne de pliage afin de fabriquer un module de communication sans fil, que lorsqu'un courant circule dans l'antenne 304, le courant circule dans le même sens dans chaque spire 320. La circulation du courant dans le même sens dans chaque spire 320 de l'antenne 304 permet d'additionner les flux de champ magnétique passant par les différents enroulements 312, 314, 516, 718 et donc d'augmenter le courant induit dans l'antenne 304.The symmetry of the direction of current flow allows, when the plate 300 is folded along the fold line assembly to fabricate a wireless communication module, that when a current flows through the antenna 304, the current flows through it. the same direction in each turn 320. The flow of current in the same direction in each turn 320 of the antenna 304 makes it possible to add the magnetic field fluxes passing through the different windings 312, 314, 516, 718 and therefore increase the current induced in the antenna 304.

Les figures 9A et 9B montrent des enroulements 900, 902, 904, 906 positionnés et reliés par des liaisons 910, 912 de sorte à ne pas permettre, lorsqu'un courant circule dans l'antenne, que le sens de circulation du courant dans les spires desdits enroulements soit symétrique par rapport aux lignes de pliage 340, 542.The figures 9A and 9B show windings 900, 902, 904, 906 positioned and connected by links 910, 912 so as not to allow, when a current flows in the antenna, that the direction of current flow in the turns of said windings is symmetrical with respect to fold lines 340, 542.

La puce électronique 310 peut être positionnée sur la même portion 330 que les deux extrémités 306, 308 de l'antenne 304 (cf. figures 3 à 7). Les deux extrémités 306, 308 de l'antenne 304 peuvent ainsi être facilement connectées électriquement à la puce électronique 310. La plaque 300 peut ainsi comprendre la puce électronique 310, ou ne pas la comprendre.The electronic chip 310 can be positioned on the same portion 330 as the two ends 306, 308 of the antenna 304 (cf. figures 3 to 7 ). The two ends 306, 308 of the antenna 304 can thus be easily electrically connected to the electronic chip 310. The plate 300 can thus include the electronic chip 310, or not include it.

La puce électronique 310, est de préférence positionnée à l'intérieur d'un enroulement 312. Les deux extrémités 306, 308 de l'antenne 304 sont aussi positionnées à l'intérieur de ce même enroulement 312. Par « positionnées à l'intérieur d'un même enroulement », on entend que, en vue de dessus, l'enroulement 312 entoure la puce électronique 310 et les extrémités 306, 308.The electronic chip 310 is preferably positioned inside a winding 312. The two ends 306, 308 of the antenna 304 are also positioned inside this same winding 312. By “positioned inside of the same winding ”, it is understood that, in top view, the winding 312 surrounds the electronic chip 310 and the ends 306, 308.

La configuration de la plaque 300 permet de choisir un nombre d'enroulement 312, 314, 516, 718 et de spire 320 par enroulement 312, 314, 516, 718 permettant fabriquer un module de communication sans fil fonctionnant à une fréquence prédéterminée, c'est-à-dire permettant d'engendrer un courant suffisant afin d'activer la puce électronique 310 à ladite fréquence, avec un champ d'activation minimum (pour un facteur de forme de l'antenne défini par les dimensions de la spire externe).The configuration of the plate 300 makes it possible to choose a number of windings 312, 314, 516, 718 and of turns 320 per winding 312, 314, 516, 718 allowing to manufacture a wireless communication module operating at a predetermined frequency, that is, that is to say, making it possible to generate a sufficient current in order to activate the electronic chip 310 at said frequency, with a minimum activation field (for a form factor of the antenna defined by the dimensions of the external coil) .

En outre, la configuration de la plaque 300 en une pluralité de portions 330, 332, 534, 636 pouvant être pliées les unes sur les autres permet de diminuer le nombre de spire 320 par portion 330, 332, 534, 636. On a donc un nombre de spire 320 diminué pour un nombre d'enroulement 312, 314, 516, 718 augmenté. Cette diminution du nombre de spire 320 entraîne une diminution de la résistance du module créé à partir de la plaque 300, et permet ainsi de limiter la perte d'énergie lors de la circulation du courant dans les spires 320. Le champ de seuil, c'est-à-dire le champ à partir duquel la puce électronique 310 est activée (mesuré en A/m) est alors amélioré, ainsi que la portée du champ de seuil.In addition, the configuration of the plate 300 in a plurality of portions 330, 332, 534, 636 which can be folded over one another makes it possible to reduce the number of turns 320 per portion 330, 332, 534, 636. We therefore have a reduced number of turns 320 for an increased number of windings 312, 314, 516, 718. This reduction in the number of turns 320 leads to a reduction in the resistance of the module created from the plate 300, and thus makes it possible to limit the loss of energy during the flow of current in the turns 320. The threshold field, c 'that is to say the field from which the electronic chip 310 is activated (measured in A / m) is then improved, as well as the range of the threshold field.

De plus, la diminution du nombre de spire 320 par enroulement 312, 314, 516, 718 permet d'augmenter la zone effective de l'antenne 304, définie par la spire 320 des enroulements 312, 314 ayant les plus petites dimensions. Par conséquent, le flux magnétique traversant l'antenne 304 est augmenté, car il dépend de la surface qu'il traverse.In addition, the reduction in the number of turns 320 per winding 312, 314, 516, 718 makes it possible to increase the effective area of the antenna 304, defined by the turn 320 of the windings 312, 314 having the smallest dimensions. Therefore, the magnetic flux passing through the antenna 304 is increased, as it depends on the area it passes through.

Le tableau 1 ci-dessous montre des conceptions d'antenne permettant d'obtenir une fréquence de à l'état OFF (i.e. une fréquence à partir de laquelle puce électronique n'est plus activée) d'environ 14,2 Mégahertz et un champ de seuil d'environ 3 A/m. L'« antenne 1 » correspond à une antenne classique comportant un enroulement ayant une spire externe de 25 millimètres par 15 millimètres. L'« antenne 2 » correspond à une antenne d'un module selon un exemple de monde de réalisation de l'invention comportant deux enroulements ayant chacun une spire externe de 25 millimètres par 15 millimètres. L'« antenne 3 » correspond à une antenne d'un module selon un exemple de monde de réalisation de l'invention comportant trois enroulements ayant chacun une spire externe de 25 millimètres par 15 millimètres. Tableau 1 Antenne 1 Antenne 2 Antenne 3 Nombre d'enroulement(s) 1 2 3 Dimensions enroulement(s) 25 x 15 mm 25 x 15 mm 25 x 15 mm Nombre de spires 10 7,5 (3,5 + 4) 7 (2 + 2,5 +2,5) Distance entre deux spires consécutives dans le plan 400 µm 400 µm 400 µm Fréquence à l'état OFF 14,28 MHz 14,31 MHz 14,54 MHz Fréquence d'activation 13,55 MHz 13,81 MHz 14 MHz Champ de seuil 3,875 A/m 3 A/m 2,67 A/m Distance de lecture pour un « Duali reader » 22 mm 25 mm 26 mm Distance de lecture pour un « Identive Cloud reader » 10 mm 16 mm 17 mm Table 1 below shows antenna designs for obtaining an OFF state frequency (ie a frequency from which the microchip is no longer activated) of approximately 14.2 Megahertz and a field threshold of about 3 A / m. The “antenna 1” corresponds to a conventional antenna comprising a winding having an outer turn of 25 millimeters by 15 millimeters. The “antenna 2” corresponds to an antenna of a module according to an exemplary embodiment of the invention comprising two windings each having an external turn of 25 millimeters by 15 millimeters. The “antenna 3” corresponds to an antenna of a module according to an exemplary embodiment of the invention comprising three windings each having an external turn of 25 millimeters by 15 millimeters. <u> Table 1 </u> Antenna 1 Antenna 2 Antenna 3 Number of winding (s) 1 2 3 Winding dimensions 25 x 15 mm 25 x 15 mm 25 x 15 mm Number of turns 10 7.5 (3.5 + 4) 7 (2 + 2.5 +2.5) Distance between two consecutive turns in the plane 400 µm 400 µm 400 µm Frequency in OFF state 14.28 MHz 14.31 MHz 14.54 MHz Activation frequency 13.55 MHz 13.81 MHz 14 MHz Threshold field 3.875 A / m 3 A / m 2.67 A / m Reading distance for a "Duali reader" 22 mm 25 mm 26 mm Reading distance for an "Identive Cloud reader" 10 mm 16 mm 17 mm

Ce tableau 1 montre que la distance de lecture augmente et que le champ de seuil diminue lorsqu'on utilise des antennes comportant plusieurs enroulements et ayant des spires externes de la même taille que la spire externe de l'antenne comportant un seul enroulement.This table 1 shows that the reading distance increases and that the threshold field decreases when using antennas comprising several windings and having external turns of the same size as the external turn of the antenna comprising a single winding.

La figure 3 décrit la plaque 300 selon un exemple de mode de réalisation de l'invention. Dans cet exemple de mode de réalisation, l'antenne 304 comporte un premier enroulement 312 et un deuxième enroulement 314. Chaque enroulement 312, 314 comporte deux spires 320. En variante, chaque enroulement 312, 314 peut comporter un nombre de spire supérieur ou égal à un et différent de deux, par exemple trois ou quatre, ce nombre pouvant être différent selon l'enroulement 312, 314.The figure 3 describes the plate 300 according to an exemplary embodiment of the invention. In this exemplary embodiment, the antenna 304 has a first winding 312 and a second winding 314. Each winding 312, 314 has two turns 320. Alternatively, each winding 312, 314 may have a number of turns greater than or equal to one and different from two, for example three or four, this number possibly being different depending on the winding 312, 314.

Les faces opposées du substrat 302 sont carrées ou rectangulaires. La plaque 300 comporte deux portions 330, 332 délimitées par les quatre bords 302a, 302b, 302c, 302d du substrat 302 et un ensemble de lignes de pliage comportant une ligne de pliage 340. Plus précisément, la plaque 300 comporte une première portion 312, délimitée par le bord droit 302a du substrat 302, la ligne de pliage 340, qui s'étend par exemple sensiblement parallèlement au bord droit 302a, une première partie du bord haut 302d reliant le bord droit 302a et la ligne de pliage 340, et une première partie du bord bas 302b reliant le bord droit 302a et la ligne de pliage 340. La plaque 300 comporte en outre une deuxième portion 314, délimitée par le bord gauche 302c du substrat 302, la ligne de pliage 340, une deuxième partie du bord haut 302d reliant le bord gauche 302c et la ligne de pliage 340, et une deuxième partie du bord bas 302b reliant le bord gauche 302c et la ligne de pliage 340. Les portions 330 et 332 peuvent avoir sensiblement les mêmes dimensions.Opposite faces of substrate 302 are square or rectangular. The plate 300 comprises two portions 330, 332 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising a fold line 340. More specifically, the plate 300 comprises a first portion 312, delimited by the right edge 302a of the substrate 302, the fold line 340, which for example extends substantially parallel to the right edge 302a, a first part of the top edge 302d connecting the right edge 302a and the fold line 340, and a first part of the bottom edge 302b connecting the right edge 302a and the fold line 340. The plate 300 further comprises a second portion 314, delimited by the left edge 302c of the substrate 302, the fold line 340, a second part of the edge top 302d connecting the left edge 302c and the fold line 340, and a second part of the bottom edge 302b connecting the left edge 302c and the fold line 340. The portions 330 and 332 can have substantially the same dimensions.

Dans ce document, par haut, bas, droit, gauche, on entend quatre orientations différentes par rapport à la plaque vue de dessus. En particulier, par haut et bas on entend deux sens opposés d'une même direction dite verticale. Par au-dessus, on entend plus haut selon la direction verticale. Par au-dessous, on entend plus bas selon la direction verticale. De même, par droit et gauche on entend deux sens opposés d'une même direction dite horizontale, les directions verticale et horizontale étant sensiblement orthogonale dans le plan de la face de la plaque considérée.In this document, by top, bottom, right, left, is meant four different orientations with respect to the plate seen from above. In particular, by top and bottom is meant two opposite directions of the same so-called vertical direction. By above is meant higher in the vertical direction. By below is meant lower in the vertical direction. Likewise, by right and left is meant two opposite directions of the same so-called horizontal direction, the vertical and horizontal directions being substantially orthogonal in the plane of the face of the plate considered.

La première portion 330 comporte le premier enroulement 312 et la deuxième portion 332 comporte le deuxième enroulement 314, les deux extrémités 306, 308 étant disposées au niveau de la même portion, par exemple au niveau de la première portion 330 comportant le premier enroulement 312.The first portion 330 comprises the first winding 312 and the second portion 332 comprises the second winding 314, the two ends 306, 308 being arranged at the same portion, for example at the level of the first portion 330 comprising the first winding 312.

Chaque enroulement 312, 314 est connecté à une extrémité 306, 308 respective, par exemple l'enroulement 312 est connecté à l'extrémité 308 et l'enroulement 314 est connecté à l'extrémité 306. L'enroulement 314 est par exemple connecté à l'extrémité 306 par une liaison 352 qui traverse la ligne de pliage 340, par exemple sensiblement en son milieu et une ou plusieurs spires 320, par exemple en s'étendant selon une direction sensiblement parallèle au bord haut 302d ou au bord bas 302b. L'enroulement 312 est par exemple connecté à l'extrémité 308 par une liaison 354, qui peut ne pas traverser de spire 320.Each winding 312, 314 is connected to a respective end 306, 308, for example the winding 312 is connected to the end 308 and the winding 314 is connected to the end 306. The winding 314 is for example connected to the end 306 by a link 352 which crosses the fold line 340, for example substantially in its middle and one or more turns 320, for example by extending in a direction substantially parallel to the top edge 302d or to the bottom edge 302b. The winding 312 is for example connected to the end 308 by a link 354, which may not pass through a turn 320.

En outre, les deux enroulements 312, 314 sont connectés entre eux par une liaison 350. La liaison 350 traverse la ligne de pliage 340. La liaison 350 comprend par exemple une partie s'étendant sensiblement entre le bord bas 302b et le bord haut 302d, cette partie traversant par exemple la ligne de pliage 340 sensiblement en son milieu.In addition, the two windings 312, 314 are connected to each other by a link 350. The link 350 crosses the fold line 340. The link 350 comprises for example a part extending substantially between the bottom edge 302b and the top edge 302d, this part for example crossing the fold line 340 substantially in its middle.

La puce électronique 310 peut être positionnée sur la portion 312 comportant les extrémités 306, 308.The electronic chip 310 can be positioned on the portion 312 comprising the ends 306, 308.

Une pluralité de sections des deux enroulements 312, 314 sont disposées de manière symétrique par rapport à la ligne de pliage 340. En particulier, deux spires, chacune d'un des deux enroulements 312, 314 sont disposées de manière symétrique par rapport à la ligne de pliage 340. Dans un exemple, seules les spires 320 externes peuvent être symétriques, car, par exemple, ces deux enroulements 312, 314 ne comportent pas le même nombre de spire 320.A plurality of sections of the two windings 312, 314 are arranged symmetrically with respect to the fold line 340. In particular, two turns, each of one of the two windings 312, 314 are arranged symmetrically with respect to the line. of folding 340. In one example, only the outer turns 320 can be symmetrical, because, for example, these two windings 312, 314 do not have the same number of turns 320.

Les deux enroulements 312, 314 peuvent comporter le même nombre de spires 320, chaque spire 320 d'un des enroulements 312, 314 ayant sensiblement les mêmes dimensions et le même positionnement sur la portion 330, 332 comprenant ledit enroulement 312, 314 qu'une spire 320 de l'autre enroulement 312, 314 sur l'autre portion 330, 332. En variante, les deux enroulements 312, 314 ne sont pas disposés de manière symétrique par rapport à la ligne de pliage 340.The two windings 312, 314 may comprise the same number of turns 320, each turn 320 of one of the windings 312, 314 having substantially the same dimensions and the same positioning on the portion 330, 332 comprising said winding 312, 314 as a turn 320 of the other winding 312, 314 on the other portion 330, 332. As a variant, the two windings 312, 314 are not arranged symmetrically with respect to the fold line 340.

L'antenne 304 est positionnée sur le substrat 302 de sorte que, pour la ligne de pliage 340 séparant les deux portions 330, 332, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 314 est symétrique par rapport à la ligne de pliage 340. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 314. Ceci est en particulier permis par la disposition de la liaison 350.The antenna 304 is positioned on the substrate 302 so that, for the fold line 340 separating the two portions 330, 332, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 314 is symmetrical with respect to the fold line 340. In other words, in top view, when current flows counterclockwise in winding 312, it flows clockwise in winding 314. This is in particular permitted by the arrangement of link 350.

La configuration de la plaque 300 en deux portions 330, 332 comportant chacune un enroulement 312, 314 et pouvant être pliées l'une sur l'autre permet de positionner deux fois moins de spires 320 sur chaque portion 330, 332 que sur une plaque classique comportant une seule portion ayant les mêmes dimensions qu'une portion 330, 332 de la plaque 300. Par exemple, les dimensions a et b de la spire 110 externe du module 100 de la figure 1 sont les mêmes que les dimensions a et b des spires externes des enroulements 312, 314 de la plaque 300 de la figure 3, et le module 100 comporte quatre spires. Il est ainsi possible de positionner deux spires 320 sur chaque portion 312, 314 de la plaque 300, les deux spires 320 ayant les dimensions des deux plus grandes spires du module 100. La zone effective de l'antenne 304, définie par la spire 320 des enroulements 312, 314 ayant les plus petites dimensions, est alors plus grande que la zone effective de l'antenne du module 100, ce qui permet de diminuer le champ de seuil et d'améliorer les performances de l'antenne.The configuration of the plate 300 in two portions 330, 332 each comprising a winding 312, 314 and which can be folded over one another makes it possible to position half the number of turns 320 on each portion 330, 332 than on a conventional plate. comprising a single portion having the same dimensions as a portion 330, 332 of the plate 300. For example, the dimensions a and b of the outer coil 110 of the module 100 of the figure 1 are the same as the dimensions a and b of the outer turns of the windings 312, 314 of the plate 300 of the figure 3 , and the module 100 has four turns. It is thus possible to position two turns 320 on each portion 312, 314 of the plate 300, the two turns 320 having the dimensions of the two largest turns of the module 100. The effective area of the antenna 304, defined by the turn 320 windings 312, 314 having the smallest dimensions, is then greater than the effective area of the antenna of the module 100, which makes it possible to reduce the threshold field and to improve the performance of the antenna.

La configuration de la plaque en deux portions 330, 332 comportant chacune un enroulement 312, 314 et pouvant être pliées l'une sur l'autre permet aussi de réduire les dimensions de l'antenne 304 en conservant les mêmes performances de l'antenne 304. La figure 4 montre par exemple une plaque 300 différant de la plaque 300 de la figure 3 en ce que chaque enroulement 312, 314 comporte quatre spires et en ce que la longueur a' de la section de la spire externe suivant le bord droit 302a est égale à la longueur a de la section de la spire externe de la figure 3 suivant le bord droit 302a divisée par deux.The configuration of the plate in two portions 330, 332 each comprising a winding 312, 314 and being able to be folded one on the other also makes it possible to reduce the dimensions of the antenna 304 while maintaining the same performances of the antenna 304. . The figure 4 shows for example a plate 300 different from the plate 300 of the figure 3 in that each winding 312, 314 has four turns and in that the length a 'of the section of the outer turn following the straight edge 302a is equal to the length a of the section of the outer turn of the figure 3 along the right edge 302a divided by two.

Lorsque l'antenne du module 100 de la figure 1, comportant quatre spires et dont les dimensions sont identiques à celles de l'antenne de la figure 3, et l'antenne de la plaque de la figure 4 sont comparées, on retrouve des performances d'antenne semblables.When the antenna of the module 100 of the figure 1 , comprising four turns and whose dimensions are identical to those of the antenna of the figure 3 , and the plate antenna of the figure 4 are compared, we find similar antenna performances.

La figure 5 décrit la plaque 300 selon un autre exemple de mode de réalisation de l'invention. Dans cet exemple de mode de réalisation, l'antenne 304 comporte un premier enroulement 312, un deuxième enroulement 314, et un troisième enroulement 516.The figure 5 describes the plate 300 according to another exemplary embodiment of the invention. In this exemplary embodiment, the antenna 304 has a first winding 312, a second winding 314, and a third winding 516.

Les faces opposées du substrat 302 sont carrées ou rectangulaires. La plaque 300 comporte trois portions 330, 332, 534 délimitées par les quatre bords 302a, 302b, 302c, 302d du substrat 302 et un ensemble de lignes de pliage comportant deux lignes de pliage 340, 542.Opposite faces of substrate 302 are square or rectangular. The plate 300 comprises three portions 330, 332, 534 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two fold lines 340, 542.

Plus précisément, la première portion 312 est délimitée par le bord droit 302a du substrat 302, la première ligne de pliage 340, qui s'étend par exemple sensiblement parallèlement au bord droit 302a, une première partie du bord haut 302d reliant le bord droit 302a et la ligne de pliage 340, et une première partie du bord bas 302b reliant le bord droit 302a et la ligne de pliage 340.More precisely, the first portion 312 is delimited by the right edge 302a of the substrate 302, the first fold line 340, which extends for example substantially parallel to the right edge 302a, a first part of the top edge 302d connecting the right edge 302a and the fold line 340, and a first portion of the bottom edge 302b connecting the straight edge 302a and the fold line 340.

La deuxième portion 314 est délimitée par la première ligne de pliage 340, la deuxième ligne de pliage 542, une deuxième partie du bord haut 302d reliant la première ligne de pliage 340 à la deuxième ligne de pliage 542, et une deuxième partie du bord bas 302b reliant la première ligne de pliage 340 à la deuxième ligne de pliage 542.The second portion 314 is delimited by the first fold line 340, the second fold line 542, a second part of the top edge 302d connecting the first fold line 340 to the second fold line 542, and a second part of the bottom edge 302b connecting the first fold line 340 to the second fold line 542.

La troisième portion 516 est délimitée par la deuxième ligne de pliage 542 le bord gauche 302c du substrat 302, une troisième partie du bord haut 302d reliant la deuxième ligne de pliage 542 au bord gauche 302c, et une troisième partie du bord bas 302b reliant la deuxième ligne de pliage 542 au bord gauche 302c.The third portion 516 is delimited by the second fold line 542 the left edge 302c of the substrate 302, a third part of the top edge 302d connecting the second fold line 542 to the left edge 302c, and a third part of the bottom edge 302b connecting the second fold line 542 at left edge 302c.

La première portion 330 comporte le premier enroulement 312, la deuxième portion 332 comporte le deuxième enroulement 314, et la troisième portion 534 comporte le troisième enroulement 516. Les deux extrémités 306, 308 sont disposées au niveau de la première portion 330 comportant le premier enroulement 312.The first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, and the third portion 534 comprises the third winding 516. The two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312.

Le premier enroulement 312 est connecté à l'extrémité 308, par exemple par une liaison 354. Dans un exemple, la liaison 354 ne traverse pas de spire 320. Le premier enroulement est de plus connecté au deuxième enroulement 314, par exemple par une liaison 350. La liaison 350 traverse la ligne de pliage 340. La liaison 350 comprend par exemple une partie s'étendant sensiblement entre le bord bas 302b et le bord haut 302d, cette partie traversant par exemple la ligne de pliage 340 sensiblement en son milieu.The first winding 312 is connected to the end 308, for example by a link 354. In one example, the link 354 does not pass through a turn 320. The first winding is further connected to the second winding 314, for example by a link 350. The link 350 crosses the fold line 340. The link 350 comprises for example a part extending substantially between the bottom edge 302b and the top edge 302d, this part for example crossing the fold line 340 substantially in its middle.

Le deuxième enroulement est en outre connecté au troisième enroulement 516, par exemple par une liaison 556. La liaison 556 traverse la ligne de pliage 542. La liaison 556 s'étend par exemple sensiblement entre le bord bas 302b et le bord haut 302d, cette partie traversant par exemple la ligne de pliage 542 sensiblement en son milieu.The second winding is further connected to the third winding 516, for example by a link 556. The link 556 crosses the fold line 542. The link 556 extends for example substantially between the bottom edge 302b and the top edge 302d, this part crossing for example the fold line 542 substantially in its middle.

De plus, le troisième enroulement 516 est connecté à l'extrémité 306, par exemple par une liaison 352 qui traverse les lignes de pliage 340, 542 et plusieurs spires 320. La liaison 352 traverse dans un exemple les lignes de pliage 340, 542 sensiblement en leurs milieux, et peut s'étendre selon une direction sensiblement parallèle au bord haut 302d ou au bord bas 302b.In addition, the third winding 516 is connected to the end 306, for example by a link 352 which crosses the fold lines 340, 542 and several turns 320. The link 352 in one example crosses the fold lines 340, 542 substantially in their centers, and may extend in a direction substantially parallel to the top edge 302d or to the bottom edge 302b.

La puce électronique 310 peut être positionnée sur la portion 312 comportant les extrémités 306, 308.The electronic chip 310 can be positioned on the portion 312 comprising the ends 306, 308.

Une pluralité de sections des premier et deuxième enroulements 312, 314 sont disposées de manière symétrique par rapport à la ligne de pliage 340. En particulier, deux spires 320, chacune d'un des deux enroulements 312, 314 peuvent être disposées de manière symétrique par rapport à la ligne de pliage 340. De même une pluralité de sections des deuxième et troisième enroulements 314, 516 sont disposées de manière symétrique par rapport à la ligne de pliage 542. En particulier, deux spires 320, chacune d'un des deux enroulements 314, 516 peuvent être disposées de manière symétrique par rapport à la ligne de pliage 542.A plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the fold line 340. In particular, two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically by with respect to the fold line 340. Likewise a plurality of sections of the second and third windings 314, 516 are disposed symmetrically with respect to the fold line 542. In particular, two turns 320, each of one of the two windings 314, 516 can be arranged symmetrically with respect to the fold line 542.

Les trois enroulements 312, 314, 516 peuvent comporter le même nombre de spires 320, chaque spire 320 d'un des enroulements 312, 314, 516 ayant sensiblement les mêmes dimensions et le même positionnement sur la portion 330, 332, 534 comprenant ledit enroulement 312, 314, 516 qu'une spire 320 des autres enroulements 312, 314 sur les autres portions 330, 332, 534.The three windings 312, 314, 516 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516 having substantially the same dimensions and the same positioning on the portion 330, 332, 534 comprising said winding 312, 314, 516 than a turn 320 of the other windings 312, 314 on the other portions 330, 332, 534.

En variante, les deux enroulements 312, 314 ne sont pas disposés de manière symétrique par rapport à la ligne de pliage 340, car, par exemple, ces deux enroulements 312, 314 ne comportent pas le même nombre de spire 320. De même les deux enroulements 314, 516 ne sont pas disposés de manière symétrique par rapport à la ligne de pliage 542, car, par exemple, ces deux enroulements 314, 516 ne comportent pas le même nombre de spire 320. Dans un exemple, seules les spires 320 externes peuvent être symétriques.As a variant, the two windings 312, 314 are not arranged symmetrically with respect to the fold line 340, because, for example, these two windings 312, 314 do not have the same number of turns 320. Likewise the two windings 314, 516 are not arranged symmetrically with respect to the fold line 542, because, for example, these two windings 314, 516 do not have the same number of turns 320. In one example, only the outer turns 320 can be symmetrical.

L'antenne 304 est positionnée sur le substrat 302 de sorte que, pour la ligne de pliage 340 séparant les deux portions 330, 332, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 314 est symétrique par rapport à la ligne de pliage 340. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 314. Ceci est en particulier permis par la disposition de la liaison 350.The antenna 304 is positioned on the substrate 302 so that, for the fold line 340 separating the two portions 330, 332, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 314 is symmetrical with respect to the fold line 340. In other words, in top view, when current flows counterclockwise in winding 312, it flows clockwise in winding 314. This is in particular permitted by the arrangement of link 350.

L'antenne 304 est en outre positionnée sur le substrat 302 de sorte que, pour la ligne de pliage 542 séparant les deux portions 332, 534, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 314, 516 est symétrique par rapport à la ligne de pliage 542. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens horaire dans l'enroulement 314, il circule dans le sens antihoraire dans l'enroulement 516. Ceci est en particulier permis par la disposition de la liaison 556.The antenna 304 is further positioned on the substrate 302 so that, for the fold line 542 separating the two portions 332, 534, when a current flows in the antenna 304, the direction of flow of the current in the turns 320 of the windings 314, 516 is symmetrical with respect to the fold line 542. In other words, when viewed from above, when the current flows clockwise in the winding 314, it flows counterclockwise in the winding 516. This is in particular permitted by the arrangement of link 556.

La figure 6 décrit la plaque 300 selon un autre exemple de mode de réalisation de l'invention. Dans cet exemple de mode de réalisation, l'antenne 304 comporte un premier enroulement 312, un deuxième enroulement 314, et un troisième enroulement 516.The figure 6 describes the plate 300 according to another exemplary embodiment of the invention. In this exemplary embodiment, the antenna 304 has a first winding 312, a second winding 314, and a third winding 516.

Les faces opposées du substrat 302 sont carrées ou rectangulaires. La plaque 300 comporte quatre portions 330, 332, 534, 636 délimitées par les quatre bords 302a, 302b, 302c, 302d du substrat 302 et un ensemble de lignes de pliage comportant deux lignes de pliage 340, 542. La première ligne de pliage 340 s'étend du bord haut 302d au bord bas 302b et la deuxième ligne de pliage 542 s'étend du bord gauche 302c au bord droit 302a en traversant la première ligne de pliage 340, de sorte à former les quatre portions 330, 332, 534, 636.Opposite faces of substrate 302 are square or rectangular. The plate 300 comprises four portions 330, 332, 534, 636 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two fold lines 340, 542. The first fold line 340 extends from the top edge 302d to the bottom edge 302b and the second fold line 542 extends from the left edge 302c to the right edge 302a crossing the first fold line 340, so as to form the four portions 330, 332, 534 , 636.

La première portion 330 est positionnée à droite de la première ligne de pliage 340 et au-dessus de la deuxième ligne de pliage 542. La deuxième portion 332 est positionnée à gauche de la première ligne de pliage 340 et au-dessus de la deuxième ligne de pliage 542. La troisième portion 534 est positionnée à droite de la première ligne de pliage 340 et au-dessous de la deuxième ligne de pliage 542. La quatrième portion 636 est positionnée à gauche de la première ligne de pliage 340 et au-dessous de la deuxième ligne de pliage 542.The first portion 330 is positioned to the right of the first fold line 340 and above the second fold line 542. The second portion 332 is positioned to the left of the first fold line 340 and above the second line fold 542. The third portion 534 is positioned to the right of the first fold line 340 and below the second fold line 542. The fourth portion 636 is positioned to the left of the first fold line 340 and below of the second fold line 542.

Dans un exemple, le bord haut 302d est sensiblement parallèle au bord bas 302b et à la deuxième ligne de pliage 542, et est sensiblement perpendiculaire au bord gauche 302c, qui est sensiblement parallèle au bord droit 302a et à la première ligne de pliage 340. En outre, la première ligne de pliage 340 peut s'étendre sensiblement du milieu du bord haut 302d au milieu du bord bas 302b et la deuxième ligne de pliage peut s'étendre sensiblement du milieu du bord droit 302a au milieu du bord gauche 302c, de sorte que les quatre portions 330, 332, 534, 636 ont sensiblement les mêmes dimensions.In one example, the top edge 302d is substantially parallel to the bottom edge 302b and the second fold line 542, and is substantially perpendicular to the left edge 302c, which is substantially parallel to the right edge 302a and the first fold line 340. Further, the first fold line 340 may extend substantially from the middle of the top edge 302d to the middle of the bottom edge 302b and the second fold line may extend substantially from the middle of the right edge 302a to the middle of the left edge 302c, so that the four portions 330, 332, 534, 636 have substantially the same dimensions.

La première portion 330 comporte le premier enroulement 312, la deuxième portion 332 comporte le deuxième enroulement 314, et la troisième portion 534 comporte le troisième enroulement 516. Les deux extrémités 306, 308 sont disposées au niveau de la première portion 330 comportant le premier enroulement 312. La quatrième portion 636 ne comporte pas d'enroulement.The first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, and the third portion 534 comprises the third winding 516. The two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312. The fourth portion 636 has no winding.

Le premier enroulement 312 est connecté à l'extrémité 308, par exemple par une liaison 354. Dans un exemple, la liaison 354 ne traverse pas de spire 320. Le premier enroulement 312 est de plus connecté au deuxième enroulement 314, par exemple par une liaison 350. La liaison 350 traverse la première ligne de pliage 340. La liaison 350 comprend par exemple une partie s'étendant sensiblement entre la deuxième ligne de pliage 542 et le bord haut 302d, cette partie traversant par exemple la partie de la première ligne de pliage 340 entre le bord haut 302d et la deuxième ligne de pliage 542 sensiblement en son milieu.The first winding 312 is connected to the end 308, for example by a link 354. In one example, the link 354 does not pass through a turn 320. The first winding 312 is further connected to the second winding 314, for example by a link 350. The link 350 passes through the first fold line 340. The link 350 comprises for example a part extending substantially between the second fold line 542 and the top edge 302d, this part passing for example through the part of the first line fold 340 between the top edge 302d and the second fold line 542 substantially in its middle.

Le deuxième enroulement 314 est en outre connecté au troisième enroulement 516, par exemple par une liaison 556. La liaison 556 traverse la première ligne de pliage 340 et la deuxième ligne de pliage 542, et peut aussi traverser une ou plusieurs spires 320. La liaison 556 s'étend par exemple à partir de la fin d'une spire 320 à l'intérieur du deuxième enroulement 314 et à proximité des lignes de pliage 340, 542 (au minimum à environ 500 micromètres), au début de la spire externe 320 du troisième enroulement 516 à proximité des lignes de pliage 340, 542.The second winding 314 is further connected to the third winding 516, for example by a link 556. The link 556 crosses the first fold line 340 and the second fold line 542, and can also pass through one or more turns 320. The link 556 extends for example from the end of a turn 320 inside the second winding 314 and near the fold lines 340, 542 (at least at about 500 micrometers), at the start of the outer turn 320 of the third winding 516 near the fold lines 340, 542.

De plus, le troisième enroulement 516 est connecté à l'extrémité 306, par exemple par une liaison 352 qui traverse la deuxième ligne de pliage 542 et peut traverser une ou plusieurs spires 320. La liaison 352 traverse dans un exemple la deuxième ligne de pliage 542 à proximité de la première ligne de pliage 340, et peut s'étendre selon une direction sensiblement parallèle à la première ligne de pliage 340.In addition, the third winding 516 is connected to the end 306, for example by a link 352 which crosses the second fold line 542 and can pass through one or more turns 320. The link 352 in one example crosses the second fold line 542 close to the first fold line 340, and may extend in a direction substantially parallel to the first fold line 340.

La puce électronique 310 peut être positionnée sur la première portion 312 comportant les extrémités 306, 308.The electronic chip 310 can be positioned on the first portion 312 comprising the ends 306, 308.

Une pluralité de sections des premier et deuxième enroulements 312, 314 sont disposées de manière symétrique par rapport à la première ligne de pliage 340. En particulier, deux spires 320, chacune d'un des deux enroulements 312, 314 peuvent être disposées de manière symétrique par rapport à la première ligne de pliage 340. De même une pluralité de sections des premier et troisième enroulements 312, 516 sont disposées de manière symétrique par rapport à la deuxième ligne de pliage 542. En particulier, deux spires 320, chacune d'un des deux enroulements 312, 516 peuvent être disposées de manière symétrique par rapport à la deuxième ligne de pliage 542.A plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the first fold line 340. In particular, two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically. relative to the first fold line 340. Likewise a plurality of sections of the first and third windings 312, 516 are arranged symmetrically with respect to the second fold line 542. In particular, two turns 320, each of one of the two windings 312, 516 can be arranged symmetrically with respect to the second fold line 542.

Les trois enroulements 312, 314, 516 peuvent comporter le même nombre de spires 320, chaque spire 320 d'un des enroulements 312, 314, 516 ayant sensiblement les mêmes dimensions et le même positionnement sur la portion 330, 332, 534 comprenant ledit enroulement 312, 314, 516 qu'une spire 320 des autres enroulements 312, 314, 516 sur les autres portions 330, 332, 534.The three windings 312, 314, 516 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516 having substantially the same dimensions and the same positioning on the portion 330, 332, 534 comprising said winding 312, 314, 516 than a turn 320 of the other windings 312, 314, 516 on the other portions 330, 332, 534.

En variante, les trois enroulements 312, 314, 516 ne sont pas disposés de manière symétrique par rapport aux lignes de pliage 340, 542 car, par exemple, ces trois enroulements 312, 314, 516 ne comportent pas le même nombre de spire 320. Dans un exemple, seules les spires 320 externes sont symétriques.As a variant, the three windings 312, 314, 516 are not arranged symmetrically with respect to the fold lines 340, 542 because, for example, these three windings 312, 314, 516 do not have the same number of turns 320. In one example, only the outer turns 320 are symmetrical.

L'antenne 304 est positionnée sur le substrat 302 de sorte que, pour la première ligne de pliage 340 séparant la première portion 330 et la deuxième portion 332, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 314 est symétrique par rapport à la première ligne de pliage 340. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 314. Ceci est en particulier permis par la disposition de la liaison 350.The antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the first portion 330 and the second portion 332, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the opposite direction. clockwise in winding 314. This is in particular permitted by the arrangement of link 350.

L'antenne 304 est en outre positionnée sur le substrat 302 de sorte que, pour la deuxième ligne de pliage 542 séparant la première portion 332 et la troisième portion 534, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 516 est symétrique par rapport à la ligne de pliage 542. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 516. Ceci est en particulier permis par la disposition de la liaison 556.The antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the first portion 332 and the third portion 534, when a current is flowing through the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 516 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the clockwise in the winding 516. This is in particular permitted by the arrangement of the link 556.

La portion 636 ne comportant pas d'enroulement peut être découpée afin de limiter l'épaisseur du module après pliage, ou conservée dans la mesure où elle présente une faible épaisseur et participe au réglage des paramètres, notamment de la capacité, de l'antenne.The portion 636 not comprising a winding can be cut in order to limit the thickness of the module after folding, or kept insofar as it has a small thickness and participates in the adjustment of the parameters, in particular the capacitance, of the antenna. .

La figure 7 décrit la plaque 300 selon un autre exemple de mode de réalisation de l'invention. Dans cet exemple de mode de réalisation, l'antenne 304 comporte un premier enroulement 312, un deuxième enroulement 314, un troisième enroulement 516 et un quatrième enroulement 718.The figure 7 describes the plate 300 according to another exemplary embodiment of the invention. In this exemplary embodiment, the antenna 304 has a first winding 312, a second winding 314, a third winding 516, and a fourth winding 718.

Les faces opposées du substrat 302 sont carrées ou rectangulaires. La plaque 300 comporte quatre portions 330, 332, 534, 636 délimitées par les quatre bords 302a, 302b, 302c, 302d du substrat 302 et un ensemble de lignes de pliage comportant deux lignes de pliage 340, 542. La première ligne de pliage 340 s'étend du bord haut 302d au bord bas 302b et la deuxième ligne de pliage 542 s'étend du bord gauche 302c au bord droit 302a en traversant la première ligne de pliage 340, de sorte à former les quatre portions 330, 332, 534, 636.Opposite faces of substrate 302 are square or rectangular. The plate 300 comprises four portions 330, 332, 534, 636 delimited by the four edges 302a, 302b, 302c, 302d of the substrate 302 and a set of fold lines comprising two lines of fold 340, 542. The first fold line 340 extends from the top edge 302d to the bottom edge 302b and the second fold line 542 extends from the left edge 302c to the right edge 302a crossing the first fold line 340, from so as to form the four portions 330, 332, 534, 636.

La première portion 330 est positionnée à droite de la première ligne de pliage 340 et au-dessus de la deuxième ligne de pliage 542. La deuxième portion 332 est positionnée à gauche de la première ligne de pliage 340 et au-dessus de la deuxième ligne de pliage 542. La troisième portion 534 est positionnée à droite de la première ligne de pliage 340 et au-dessous de la deuxième ligne de pliage 542. La quatrième portion 636 est positionnée à gauche de la première ligne de pliage 340 et au-dessous de la deuxième ligne de pliage 542.The first portion 330 is positioned to the right of the first fold line 340 and above the second fold line 542. The second portion 332 is positioned to the left of the first fold line 340 and above the second line fold 542. The third portion 534 is positioned to the right of the first fold line 340 and below the second fold line 542. The fourth portion 636 is positioned to the left of the first fold line 340 and below of the second fold line 542.

Dans un exemple, le bord haut 302d est sensiblement parallèle au bord bas 302b et à la deuxième ligne de pliage 542, et est sensiblement perpendiculaire au bord gauche 302c, qui est sensiblement parallèle au bord droit 302a et à la première ligne de pliage 340. En outre, la première ligne de pliage 340 peut s'étendre sensiblement du milieu du bord haut 302d au milieu du bord bas 302b et la deuxième ligne de pliage peut s'étendre sensiblement du milieu du bord droit 302a au milieu du bord gauche 302c, de sorte que les quatre portions 330, 332, 534, 636 ont sensiblement les mêmes dimensions.In one example, the top edge 302d is substantially parallel to the bottom edge 302b and the second fold line 542, and is substantially perpendicular to the left edge 302c, which is substantially parallel to the right edge 302a and the first fold line 340. Further, the first fold line 340 can extend substantially from the middle of the top edge 302d to the middle of the bottom edge 302b and the second fold line can extend substantially from the middle of the right edge 302a to the middle of the left edge 302c, so that the four portions 330, 332, 534, 636 have substantially the same dimensions.

La première portion 330 comporte le premier enroulement 312, la deuxième portion 332 comporte le deuxième enroulement 314, la troisième portion 534 comporte le troisième enroulement 516 et la quatrième portion 636 comporte le quatrième enroulement 718. Les deux extrémités 306, 308 sont disposées au niveau de la première portion 330 comportant le premier enroulement 312.The first portion 330 comprises the first winding 312, the second portion 332 comprises the second winding 314, the third portion 534 comprises the third winding 516 and the fourth portion 636 comprises the fourth winding 718. The two ends 306, 308 are disposed at the level of the first portion 330 comprising the first winding 312.

Le premier enroulement 312 est connecté à l'extrémité 308, par exemple par une liaison 354. Dans un exemple, la liaison 354 ne traverse pas de spire 320. Le premier enroulement 312 est de plus connecté au deuxième enroulement 314, par exemple par une liaison 350. La liaison 350 traverse la première ligne de pliage 340. La liaison 350 comprend par exemple une partie s'étendant sensiblement entre la deuxième ligne de pliage 542 et le bord haut 302d, cette partie traversant par exemple la partie de la première ligne de pliage 340 entre le bord haut 302d et la deuxième ligne de pliage 542 sensiblement en son milieu.The first winding 312 is connected to the end 308, for example by a link 354. In one example, the link 354 does not pass through a turn 320. The first winding 312 is further connected to the second winding 314, for example by a link 350. The link 350 passes through the first fold line 340. The link 350 comprises for example a part extending substantially between the second fold line 542 and the top edge 302d, this part passing for example through the part of the first line fold 340 between the top edge 302d and the second fold line 542 substantially in its middle.

Le deuxième enroulement est en outre connecté au troisième enroulement 516, par exemple par une liaison 556. La liaison 556 traverse la première ligne de pliage 340 et la deuxième ligne de pliage 542, et peut aussi traverser une ou plusieurs spires 320. La liaison 556 s'étend par exemple à partir de la fin d'une spire 320 à l'intérieur du deuxième enroulement 314 et à proximité des lignes de pliage 340, 542 (au minimum à environ 500 micromètres), au début de la spire externe 320 du troisième enroulement 516 à proximité des lignes de pliage 340, 542.The second winding is further connected to the third winding 516, for example by a link 556. The link 556 crosses the first fold line 340 and the second fold line 542, and can also cross one or more turns 320. The link 556 extends for example from the end of a turn 320 inside the second winding 314 and close to the fold lines 340, 542 (at a minimum of about 500 micrometers), at the start of the outer turn 320 of the third winding 516 near the fold lines 340, 542.

De plus, le troisième enroulement 516 est connecté au quatrième enroulement 718, par exemple par une liaison 758. La liaison 758 traverse la première ligne de pliage 340, et peut aussi traverser une ou plusieurs spires 320. La liaison 556 s'étend par exemple à partir de la fin d'une spire 320 à l'intérieur du troisième enroulement 516 et à proximité des lignes de pliage 340, 542, au début de la spire externe 320 du quatrième enroulement 718 à proximité des lignes de pliage 340, 542.In addition, the third winding 516 is connected to the fourth winding 718, for example by a link 758. The link 758 crosses the first fold line 340, and can also pass through one or more turns 320. The link 556 extends for example. from the end of a turn 320 inside the third winding 516 and near the fold lines 340, 542, to the start of the outer turn 320 of the fourth winding 718 near the fold lines 340, 542.

Le quatrième enroulement est en outre connecté à l'extrémité 306, par exemple par une liaison 352 qui traverse la première ligne de pliage 340 et la deuxième ligne de pliage 542 et peut traverser une ou plusieurs spires 320.The fourth winding is further connected to the end 306, for example by a link 352 which crosses the first fold line 340 and the second fold line 542 and can pass through one or more turns 320.

La puce électronique 310 peut être positionnée sur la première portion 312 comportant les extrémités 306, 308.The electronic chip 310 can be positioned on the first portion 312 comprising the ends 306, 308.

Une pluralité de sections des premier et deuxième enroulements 312, 314 sont disposées de manière symétrique par rapport à la première ligne de pliage 340. En particulier, deux spires 320, chacune d'un des deux enroulements 312, 314 peuvent être disposées de manière symétrique par rapport à la première ligne de pliage 340.A plurality of sections of the first and second windings 312, 314 are arranged symmetrically with respect to the first fold line 340. In particular, two turns 320, each of one of the two windings 312, 314 can be arranged symmetrically. relative to the first fold line 340.

De même, une pluralité de sections des troisième et quatrième enroulements 516, 718 sont disposées de manière symétrique par rapport à la première ligne de pliage 340. En particulier, deux spires 320, chacune d'un des deux enroulements 516, 718 peuvent être disposées de manière symétrique par rapport à la première ligne de pliage 340.Likewise, a plurality of sections of the third and fourth windings 516, 718 are disposed symmetrically with respect to the first fold line 340. In particular, two turns 320, each of one of the two windings 516, 718 may be disposed. symmetrically with respect to the first fold line 340.

De même une pluralité de sections des premier et troisième enroulements 312, 516 sont disposées de manière symétrique par rapport à la deuxième ligne de pliage 542. En particulier, deux spires 320, chacune d'un des deux enroulements 312, 516 peuvent être disposées de manière symétrique par rapport à la deuxième ligne de pliage 542.Likewise, a plurality of sections of the first and third windings 312, 516 are arranged symmetrically with respect to the second fold line 542. In particular, two turns 320, each of one of the two windings 312, 516 can be arranged in parallel. symmetrically with respect to the second fold line 542.

De même une pluralité de sections des deuxième et quatrième enroulements 314, 718 sont disposées de manière symétrique par rapport à la deuxième ligne de pliage 542. En particulier, deux spires 320, chacune d'un des deux enroulements 314, 718 peuvent être disposées de manière symétrique par rapport à la deuxième ligne de pliage 542.Likewise a plurality of sections of the second and fourth windings 314, 718 are arranged symmetrically with respect to the second fold line 542. In particular, two turns 320, each of one of the two windings 314, 718 can be arranged in symmetrically with respect to the second fold line 542.

Les quatre enroulements 312, 314, 516, 718 peuvent comporter le même nombre de spires 320, chaque spire 320 d'un des enroulements 312, 314, 516, 718 ayant sensiblement les mêmes dimensions et le même positionnement sur la portion 330, 332, 534, 636 comprenant ledit enroulement 312, 314, 516, 718 qu'une spire 320 des autres enroulements 312, 314, 516, 718 sur les autres portions 330, 332, 534, 636.The four windings 312, 314, 516, 718 can comprise the same number of turns 320, each turn 320 of one of the windings 312, 314, 516, 718 having substantially the same dimensions and the same positioning on the portion 330, 332, 534, 636 comprising said winding 312, 314, 516, 718 as a turn 320 of the other windings 312, 314, 516, 718 on the other portions 330, 332, 534, 636.

En variante, les quatre enroulements 312, 314, 516, 718 ne sont pas disposés de manière symétrique par rapport aux lignes de pliage 340, 542 car, par exemple, ces quatre enroulements 312, 314, 516, 718 ne comportent pas le même nombre de spire 320. Dans un exemple, seules les spires 320 externes sont symétriques.Alternatively, the four windings 312, 314, 516, 718 are not arranged symmetrically with respect to the fold lines 340, 542 because, for example, these four windings 312, 314, 516, 718 do not have the same number of turns 320. In one example, only the outer turns 320 are symmetrical.

L'antenne 304 est positionnée sur le substrat 302 de sorte que, pour la première ligne de pliage 340 séparant la première portion 330 et la deuxième portion 332, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 314 est symétrique par rapport à la première ligne de pliage 340. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 314. Ceci est en particulier permis par la disposition de la liaison 350.The antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the first portion 330 and the second portion 332, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 312, 314 is symmetrical with respect to the first fold line 340. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the opposite direction. clockwise in winding 314. This is in particular permitted by the arrangement of link 350.

L'antenne 304 est positionnée sur le substrat 302 de sorte que, pour la première ligne de pliage 340 séparant la troisième portion 534 et la quatrième portion 718, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 516, 718 est symétrique par rapport à la première ligne de pliage 340. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens horaire dans l'enroulement 516, il circule dans le sens antihoraire dans l'enroulement 718. Ceci est en particulier permis par la disposition de la liaison 758.The antenna 304 is positioned on the substrate 302 so that, for the first fold line 340 separating the third portion 534 and the fourth portion 718, when a current is flowing through the antenna 304, the direction of current flow in the turns 320 of the windings 516, 718 is symmetrical with respect to the first fold line 340. In other words, in top view, when the current flows clockwise in the winding 516, it flows in the direction counterclockwise in winding 718. This is in particular permitted by the arrangement of link 758.

L'antenne 304 est en outre positionnée sur le substrat 302 de sorte que, pour la deuxième ligne de pliage 542 séparant la première portion 330 et la troisième portion 534, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 312, 516 est symétrique par rapport à la ligne de pliage 542. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens antihoraire dans l'enroulement 312, il circule dans le sens horaire dans l'enroulement 516.The antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the first portion 330 and the third portion 534, when a current is flowing through the antenna 304, the direction of flow of the current in the turns 320 of the windings 312, 516 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows counterclockwise in the winding 312, it flows in the clockwise in winding 516.

L'antenne 304 est en outre positionnée sur le substrat 302 de sorte que, pour la deuxième ligne de pliage 542 séparant la deuxième portion 332 et la quatrième portion 636, lorsqu'un courant circule dans l'antenne 304, le sens de circulation du courant dans les spires 320 des enroulements 314, 718 est symétrique par rapport à la ligne de pliage 542. En d'autres termes, en vue de dessus, lorsque le courant circule dans le sens horaire dans l'enroulement 314, il circule dans le sens antihoraire dans l'enroulement 718.The antenna 304 is further positioned on the substrate 302 so that, for the second fold line 542 separating the second portion 332 and the fourth portion 636, when a current flows through the antenna 304, the direction of flow of the current in the turns 320 of the windings 314, 718 is symmetrical with respect to the fold line 542. In other words, in top view, when the current flows clockwise in the winding 314, it flows in the counterclockwise in winding 718.

En référence à la figure 10 il est décrit un procédé de fabrication d'un module de communication sans fil comprenant une pluralité de couches superposées, par exemple un procédé de fabrication d'un module tel que décrit ci-après.With reference to the figure 10 a method for manufacturing a wireless communication module comprising a plurality of superimposed layers is described, for example a method for manufacturing a module as described below.

Dans une étape 1000, on fournit une plaque 300 telle que décrite précédemment. L'étape 1000 peut comprendre les étapes 1001, 1003 et éventuellement 1002 et 1004 décrites ci-dessous, de sorte à former un procédé de fabrication de la plaque 300.In a step 1000, a plate 300 is provided as described above. Step 1000 can comprise steps 1001, 1003 and optionally 1002 and 1004 described below, so as to form a process for manufacturing the plate 300.

Dans l'étape 1001, un substrat est fourni, ledit substrat étant délimité par des bords. Le substrat est par exemple un substrat 302 selon l'un des exemples décrits précédemment en référence aux figures 3 à 7. Dans un exemple, une plaque de substrats 1100 comportant plusieurs substrats 302 solidaires est fournie (voir figure 11 ).In step 1001, a substrate is provided, said substrate being delimited by edges. The substrate is for example a substrate 302 according to one of the examples described. previously with reference to figures 3 to 7 . In one example, a plate of substrates 1100 comprising several substrates 302 integral with one another is provided (see figure 11 ).

Dans l'étape 1002, qui est facultative, un ensemble de ligne de pliage comprenant au moins une ligne de pliage est formé dans le substrat. Dans un exemple, chaque ligne de pliage est formée par amincissement de la matière du substrat, ou est formée par pliage et dépliage du substrat. Le substrat est alors divisé en une pluralité de portions délimitées par l'ensemble de ligne de pliage et les bords du substrat.In step 1002, which is optional, a fold line assembly including at least one fold line is formed in the substrate. In one example, each fold line is formed by thinning the material of the substrate, or is formed by folding and unfolding the substrate. The substrate is then divided into a plurality of portions delimited by the fold line assembly and the edges of the substrate.

Dans l'étape 1003, une antenne est formée sur le substrat, par exemple sur une même face du substrat. La surface de l'antenne est au moins partiellement isolée électriquement, et l'antenne comporte deux extrémités adaptées pour être connectées à une puce électronique, et une pluralité d'enroulements, chacun comportant au moins une spire. L'antenne est formée sur le substrat de sorte à former une plaque comprenant une pluralité de portions délimitées par l'ensemble de ligne de pliage et les bords du substrat, au moins deux des portions comprenant chacune au moins un enroulement, et les deux extrémités étant disposées au niveau de la même portion.In step 1003, an antenna is formed on the substrate, for example on the same face of the substrate. The surface of the antenna is at least partially electrically insulated, and the antenna has two ends adapted to be connected to an electronic chip, and a plurality of windings, each comprising at least one turn. The antenna is formed on the substrate so as to form a plate comprising a plurality of portions bounded by the fold line assembly and the edges of the substrate, at least two of the portions each comprising at least one winding, and the two ends being arranged at the same portion.

L'antenne et la plaque sont par exemple respectivement une antenne 304 une plaque 300 selon l'un des exemples décrits précédemment en référence aux figures 3 à 7.The antenna and the plate are for example respectively an antenna 304 a plate 300 according to one of the examples described above with reference to figures 3 to 7 .

L'antenne est déposée sur le substrat, par exemple par une dépose en continu d'un fil sur le substrat.The antenna is deposited on the substrate, for example by continuously depositing a wire on the substrate.

L'antenne est ensuite fixée sur le substrat. La fixation peut être effectuée par collage, typiquement lorsque l'antenne est un fil métallique émaillé. Dans un autre exemple (typiquement lorsque l'antenne est un fil métallique gainé), l'antenne est fixée en étant incorporée dans le substrat, par exemple en étant incrustée dans le substrat au moyen d'une technique utilisant des ultrasons.The antenna is then fixed to the substrate. The fixing can be carried out by gluing, typically when the antenna is an enamelled metal wire. In another example (typically when the antenna is a sheathed metal wire), the antenna is fixed by being incorporated into the substrate, for example by being embedded in the substrate by means of a technique using ultrasound.

La puce électronique peut ensuite être positionnée sur la portion comportant les deux extrémités (étape 1004). En variante, la puce électronique est positionnée sur une portion du substrat avant l'étape 1003 de formation de l'antenne, et les deux extrémités sont positionnées sur la portion comportant la puce électronique. La puce électronique est par exemple une puce électronique 310 selon l'un des exemples décrits précédemment en référence aux figures 3 à 7.The electronic chip can then be positioned on the portion comprising the two ends (step 1004). As a variant, the electronic chip is positioned on a portion of the substrate before step 1003 of forming the antenna, and the two ends are positioned on the portion comprising the electronic chip. The electronic chip is for example an electronic chip 310 according to one of the examples described above with reference to figures 3 to 7 .

Dans l'exemple où une plaque de substrats 1100 est fournie, la formation de l'antenne et le positionnement de la puce électronique sont effectués pour chaque substrat 302 de la plaque 1100 (voir figure 11).In the example where a plate of substrates 1100 is provided, the formation of the antenna and the positioning of the electronic chip are carried out for each substrate 302 of the plate 1100 (see figure 11 ).

Dans une étape 1005 facultative, une portion ne comportant pas d'enroulement est découpée. En variante, la portion ne comportant pas d'enroulement n'est pas découpée.In an optional step 1005, a portion not comprising a winding is cut. As a variant, the portion not comprising a winding is not cut.

Dans une étape 1006 facultative, une couche adhésive est positionnée sur une face d'une portion devant être repliée sur une autre portion après l'étape 1008 de pliage décrite ci-dessous. En variante, une couche adhésive est positionnée sur chaque face devant être repliée sur une portion. Dans l'exemple où une plaque de substrats 1100 est fournie, la couche adhésive 1102, 1104 peut être déposée sur une portion de chaque substrat en une seule opération (cf. figure 11).In an optional step 1006, an adhesive layer is positioned on one side of a portion to be folded over another portion after the folding step 1008 described below. Alternatively, an adhesive layer is positioned on each side to be folded over a portion. In the example where a plate of substrates 1100 is provided, the adhesive layer 1102, 1104 can be deposited on a portion of each substrate in a single operation (cf. figure 11 ).

Dans une étape 1008, le substrat ou la plaque est plié selon l'au moins une ligne de pliage de sorte à former au moins deux couches de la pluralité de couches superposées.In a step 1008, the substrate or the plate is folded along the at least one fold line so as to form at least two layers of the plurality of superimposed layers.

Plus précisément, la plaque est pliée selon une première ligne de pliage de sorte à former deux couches, chaque couche correspondant à au moins une portion du substrat. Ce premier pliage de la plaque peut amener au moins une deuxième ligne de pliage, présente sur les deux couches, à être repliée sur elle-même.More precisely, the plate is folded along a first fold line so as to form two layers, each layer corresponding to at least a portion of the substrate. This first folding of the plate can cause at least a second folding line, present on the two layers, to be folded back on itself.

Si la plaque comporte une deuxième ligne de pliage, elle est ensuite pliée selon cette deuxième ligne de pliage, et ainsi de suite, jusqu'à ce que toutes les portions soient empilées les unes sur les autres de sorte à former une pluralité de couches superposées.If the plate has a second fold line, it is then folded along this second fold line, and so on, until all the portions are stacked on top of each other so as to form a plurality of overlapping layers. .

Dans une étape 1010 facultative, la pluralité de couches superposées est laminée, par exemple directement, sans couche intermédiaire afin d'obtenir un module fin. La plaque est alors pliée de manière irréversible. En variante cette étape 1010 n'est pas effectuée. Il est ainsi possible de plier la plaque de manière réversible, et ainsi de pouvoir modifier la capacité additionnelle obtenue en pliant la plaque différemment. Par exemple, pour une plaque comportant trois enroulements, au moins un des enroulements ayant un nombre de spire différent des autres (par exemple le premier enroulement comportant deux spires, tandis que les deuxième et troisième enroulements comportent 3 spires), la capacité additionnelle obtenue est différente si le deuxième enroulement se retrouve après pliage entre les premier et troisième enroulements ou si le troisième enroulement se retrouve après pliage entre les premier et deuxième enroulements.In an optional step 1010, the plurality of superimposed layers are laminated, for example directly, without an intermediate layer in order to obtain a fine modulus. The plate is then irreversibly folded. As a variant, this step 1010 is not carried out. It is thus possible to bend the plate in a reversible manner, and thus to be able to modify the additional capacity obtained by bending the plate differently. For example, for a plate comprising three windings, at least one of the windings having a number of turns different from the others (for example the first winding comprising two turns, while the second and third windings have 3 turns), the additional capacity obtained is different if the second winding is found after folding between the first and third windings or if the third winding is found after folding between the first and second windings.

En référence aux figures 12, 13, 14 et 15 , il est décrit un module 1200 de communication sans fil, par exemple fabriqué à partir d'une plaque 300 telle que décrite en référence aux figures 3 à 7. Le module 1200 est par exemple obtenu à partir du procédé de fabrication tel que décrit précédemment. Le module 1200 comprend un substrat 302, par exemple un substrat 302 tel que décrit précédemment plié, une puce électronique 310, par exemple une puce électronique 310 telle que décrite précédemment, et une antenne 304, par exemple une antenne 304 telle que décrite précédemment.With reference to figures 12, 13, 14 and 15 , there is described a wireless communication module 1200, for example made from a plate 300 as described with reference to figures 3 to 7 . The module 1200 is for example obtained from the manufacturing process as described above. The module 1200 comprises a substrate 302, for example a substrate 302 as described previously folded, an electronic chip 310, for example an electronic chip 310 as described previously, and an antenna 304, for example an antenna 304 as described previously.

L'antenne 304 comprend deux extrémités connectées à la puce électronique 310, et une pluralité d'enroulements 312, 314, 516, 718, chacun comportant au moins une spire 320, par exemple une pluralité de spires 320.The antenna 304 comprises two ends connected to the electronic chip 310, and a plurality of windings 312, 314, 516, 718, each comprising at least one turn 320, for example a plurality of turns 320.

Le module 1200 comprend une pluralité de couches superposées, le substrat 302 (ou la plaque 300) étant plié de sorte à former au moins deux couches 1202, 1204, 1406, 1408 de la pluralité de couches. Au moins deux des couches 1202, 1204, 1406, 1408 formées par le pliage du substrat 302 comprennent chacune au moins un enroulement 312, 314, 516, 718 et les deux extrémités sont positionnées au niveau d'une même couche 1202, 1204, 1406, 1408.Module 1200 includes a plurality of superimposed layers, with substrate 302 (or plate 300) being folded to form at least two layers 1202, 1204, 1406, 1408 of the plurality of layers. At least two of the layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302 each comprise at least one winding 312, 314, 516, 718 and the two ends are positioned at the same layer 1202, 1204, 1406 , 1408.

Les couches 1202, 1204, 1406, 1408 formées par le substrat 302 correspondent ainsi aux portions 330, 332, 534, 636 de la plaque 300 une fois le substrat 302 plié selon l'ensemble de ligne de pliage.The layers 1202, 1204, 1406, 1408 formed by the substrate 302 thus correspond to the portions 330, 332, 534, 636 of the plate 300 once the substrate 302 is folded along the fold line assembly.

Les deux extrémités sont positionnées sur une même face d'une même couche 1202, 1204, 1406, 1408 des au moins deux couches 1202, 1204, 1406, 1408 formées par le pliage du substrat 302.The two ends are positioned on the same face of the same layer 1202, 1204, 1406, 1408 of at least two layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302.

En outre, les enroulements 312, 314, 516, 718 sont agencés de sorte que lorsqu'un courant circule dans l'antenne 304, le courant circule dans le même sens dans chaque spire 320, par exemple le sens horaire ou le sens antihoraire en vue de dessus d'une face d'une couche 1202, 1204, 1406, 1408 du module 1200.Further, the windings 312, 314, 516, 718 are arranged so that when a current flows through the antenna 304, the current flows in the same direction in each turn 320, for example clockwise or counterclockwise in top view of a face of a layer 1202, 1204, 1406, 1408 of the module 1200.

Une couche isolante peut être positionnée entre au moins deux des couches 1202, 1204, 1406, 1408 formées par le pliage du substrat 302. Cette couche est en plastique, par exemple en PVC. Cette couche permet d'ajuster la capacité additionnelle.An insulating layer can be positioned between at least two of the layers 1202, 1204, 1406, 1408 formed by the folding of the substrate 302. This layer is made of plastic, for example PVC. This layer makes it possible to adjust the additional capacity.

Dans un exemple, le module 1200 fonctionne à une fréquence de communication de 13,56 MHz. Cette fréquence est utilisée dans des protocoles de communication définis dans les normes ISO 14443, ISO 15693, ISO 18000-3.In one example, the module 1200 operates at a communication frequency of 13.56 MHz. This frequency is used in communication protocols defined in standards ISO 14443, ISO 15693, ISO 18000-3.

De plus, au moins deux sections de deux spires 320 de la pluralité d'enroulement 312, 314, 516, 718 c'est-à-dire d'une spire d'un des enroulements 312, 314, 516, 718 et d'une spire 320 d'un autre enroulement 312, 314, 516, 718 peuvent être superposées. Par « superposées », on entend que les sections sont sensiblement alignées le long d'un plan perpendiculaire au substrat 302.In addition, at least two sections of two turns 320 of the plurality of windings 312, 314, 516, 718, i.e. one turn of one of the windings 312, 314, 516, 718 and a turn 320 of another winding 312, 314, 516, 718 can be superimposed. By “superimposed” is meant that the sections are substantially aligned along a plane perpendicular to the substrate 302.

Dans un exemple, au moins deux spires 320 de la pluralité d'enroulement 312, 314, 516, 718 sont superposées. Par exemple, les centres des deux spires 320 de la pluralité d'enroulement 312, 314, 516, 718 sont superposés. Par exemple, si l'on projette la première spire superposée dans le plan de la deuxième spire superposée, le décalage maximum entre la projection de la première spire et la deuxième spire est de 300 micromètres.In one example, at least two turns 320 of the plurality of windings 312, 314, 516, 718 are superimposed. For example, the centers of the two turns 320 of the plurality of windings 312, 314, 516, 718 are superimposed. For example, if we project the first superimposed turn in the plane of the second superimposed turn, the maximum offset between the projection of the first turn and the second turn is 300 micrometers.

Dans un exemple, au moins deux enroulements 312, 314, 516, 718, par exemple tous les enroulements 312, 314, 516, 718, sont superposés. Par exemple, les centres des enroulements 312, 314, 516, 718 superposés sont superposés.In one example, at least two windings 312, 314, 516, 718, for example all windings 312, 314, 516, 718, are superimposed. For example, the centers of the superimposed windings 312, 314, 516, 718 are superimposed.

Plus précisément, la figure 12 montre une coupe d'un module 1200 fabriqué par pliage de la plaque 300 de la figure 3. Afin de fabriquer ce module 1200, la plaque 300 de la figure 3 est pliée (étape 1008) selon la ligne de pliage 340, de sorte que les enroulements 312, 314 soient séparés par les deux couches 1202, 1204. La couche 1202 correspond à la portion 330 et la couche 1204 correspond à la portion 332. En variante, la plaque 300 de la figure 3 est pliée selon la ligne de pliage 340, de sorte que les enroulements 312, 314 soient pris en sandwich entre les deux couches 1202, 1204 (voir figure 13 ). More precisely, the figure 12 shows a section of a 1200 module made by bending the plate 300 of the figure 3 . In order to manufacture this module 1200, the plate 300 of the figure 3 is folded (step 1008) along the fold line 340, so that the windings 312, 314 are separated by the two layers 1202, 1204. The layer 1202 corresponds to the portion 330 and the layer 1204 corresponds to the portion 332. In this way variant, plate 300 of the figure 3 is folded along the fold line 340, so that the windings 312, 314 are sandwiched between the two layers 1202, 1204 (see figure 13 ).

La figure 14 montre une coupe d'un module 1200 fabriqué par pliage de la plaque 300 de la figure 6. Afin de fabriquer ce module 1200, la plaque 300 de la figure 6 est d'abord pliée selon la première ligne de pliage 340, de sorte que les enroulements 312, 314 soient séparés par les couches 1202, 1204. La deuxième ligne de pliage 542 est alors repliée sur elle-même.The figure 14 shows a section of a 1200 module made by bending the plate 300 of the figure 6 . In order to manufacture this module 1200, the plate 300 of the figure 6 is first folded along the first fold line 340, so that the windings 312, 314 are separated by the layers 1202, 1204. The second fold line 542 is then folded back on itself.

Ensuite, la plaque 300 est pliée selon la deuxième ligne de pliage 542 de sorte que les enroulements 312, 516 soient pris en sandwich entre les couches 1406, 1408 d'une part et les couches 1202, 1204 d'autre part. La couche 1202 correspond à la portion 330, la couche 1204 correspond à la portion 332, la couche 1406 correspond à la couche 636 et la couche 1408 correspond à la couche 534. En variante, la plaque est pliée selon la deuxième ligne de pliage 542 de sorte que l'enroulement 516 soit séparé de l'enroulement 314 par les couches 1406, 1408.Then, the plate 300 is folded along the second fold line 542 so that the windings 312, 516 are sandwiched between the layers 1406, 1408 on the one hand and the layers 1202, 1204 on the other hand. Layer 1202 corresponds to portion 330, layer 1204 corresponds to portion 332, layer 1406 corresponds to layer 636 and layer 1408 corresponds to layer 534. Alternatively, the plate is folded along the second fold line 542. so that the winding 516 is separated from the winding 314 by the layers 1406, 1408.

En variante, la plaque 300 est pliée selon la ligne de pliage 340, de sorte que les enroulements 312, 314 soient pris en sandwich entre les deux couches 1202, 1204. Ensuite, la plaque 300 est pliée selon la deuxième ligne de pliage 542 de sorte que l'enroulement 516 soit séparé de l'enroulement 314 par les couches 1204, 1406. En variante, la plaque est pliée selon la deuxième ligne de pliage 542 de sorte que l'enroulement 516 soit séparé de l'enroulement 312 par les couches 1202, 1408.Alternatively, the plate 300 is folded along the fold line 340, so that the windings 312, 314 are sandwiched between the two layers 1202, 1204. Then, the plate 300 is folded along the second fold line 542 of so that the winding 516 is separated from the winding 314 by the layers 1204, 1406. Alternatively, the plate is folded along the second fold line 542 so that the winding 516 is separated from the winding 312 by the layers. layers 1202, 1408.

La figure 15 montre une coupe d'un module 1200 fabriqué par pliage de la plaque 300 de la figure 7. Afin de fabriquer le module 1200 de la figure 15, la plaque de la figure 7 peut être pliée de la même manière que la plaque de la figure 6 lorsque cette dernière est pliée afin de fabriquer le module de la figure 14.The figure 15 shows a section of a 1200 module made by bending the plate 300 of the figure 7 . In order to manufacture the 1200 module of the figure 15 , the plate of the figure 7 can be folded in the same way as the plate of the figure 6 when the latter is folded in order to manufacture the module of the figure 14 .

Claims (15)

  1. A plate (300) suitable for use in manufacturing a wireless communication module (1200), said plate comprising:
    - a substrate (302) delimited by edges (302a, 302b, 302c, 302d),
    - an antenna (304) having a surface that is at least partially electrically insulated, said antenna comprising:
    - two ends (306, 308) suitable for being connected to an electronic chip (310), and
    - a plurality of windings (312, 314, 516, 718), each including at least one turn (320),
    the plate comprising a plurality of portions (330, 332, 534, 636) delimited by a folding line assembly comprising at least one folding line (340, 542) and the edges (302a, 302b, 302c, 302d) of the substrate (302), such that:
    - at least two of the portions (330, 332, 534, 636) each comprise at least one winding (312, 314, 516, 718), and
    - the two ends (306, 308) are positioned at the same portion (330, 332, 534, 636),
    characterized in that the antenna (304) is formed by a continuous wire of material.
  2. The plate according to claim 1, wherein the substrate (302) has dimensions smaller than or equal to one quarter of the ID-1 format.
  3. The plate according to claim 1 or 2, wherein the windings (312, 314, 516, 718) are formed on a same face of the substrate (302).
  4. The plate according to any one of claims 1 to 3, wherein the antenna (304) is incorporated into the substrate (302).
  5. The plate according to any one of claims 1 to 4, wherein the two ends (306, 308) are positioned inside a same winding (312, 314, 516, 718) of the plurality of windings.
  6. The plate according to any one of claims 1 to 5, wherein, for at least one folding line (340, 542) of the folding line assembly, two turns (320) of the plurality of windings are positioned substantially symmetrically relative to said folding line (340, 542).
  7. The plate according to any one of claims 1 to 6, wherein at least one portion (330, 332, 534, 636) comprises a winding (312, 314, 516, 718) having a turn (320) following the contour of said portion (330, 332, 534, 636).
  8. The plate according to any one of claims 1 to 7, wherein the minimum distance between two turns (320) of a same winding (312, 314, 516, 718) is 100 micrometers.
  9. The plate according to any one of claims 1 to 8, including at least three portions (330, 332, 534) each comprising a winding (312, 314, 516).
  10. A wireless communication module (1200) comprising:
    - a substrate (302),
    - an electronic chip (310),
    - an antenna (304) having a surface that is at least partially electrically insulated, said antenna comprising:
    - two ends (306, 308) connected to the electronic chip (310), and
    - a plurality of windings (312, 314, 516, 718), each including at least one turn (320),
    wherein:
    - the module comprises a plurality of superimposed layers (1202, 1204, 1406, 1408), the substrate (302) being folded so as to form at least two layers (1202, 1204, 1406, 1408) of the plurality of layers,
    - at least two of the layers (1202, 1204, 1406, 1408) formed by the folding of said substrate (302) each comprising at least one winding (312, 314, 516, 718), and
    - the two ends (306, 308) are positioned at a same layer (1202, 1204, 1406, 1408),
    characterized in that the antenna (304) is formed by a continuous wire of material.
  11. The module according to claim 10, wherein the windings (312, 314, 516, 718) are arranged such that when a current circulates in the antenna (304), the current circulates in the same direction in each turn (320).
  12. The module according to claim 10 or 11, wherein an insulating layer is positioned between at least two of the layers (1202, 1204, 1406, 1408) formed by the folding of said substrate (302).
  13. The module according to any one of claims 10 to 12, operating at a communication frequency of 13.56 MHz.
  14. The module according to any one of claims 10 to 13, wherein two turns (320) of the plurality of windings are superimposed.
  15. A method for manufacturing a wireless communication module (1200) comprising a plurality of superimposed layers (1202, 1204, 1406, 1408), said method comprising:
    - providing (1000) a plate (300) according to one of claims 1 to 9,
    - positioning (1004) an electronic chip (304) on the portion (330, 332, 534, 636) including the two ends (306, 308), and
    - folding (1008) the plate (300) along at least one folding line (340, 542) so as to form at least two layers (1202, 1204, 1406, 1408) of the plurality of superimposed layers.
EP16825851.5A 2015-12-17 2016-12-15 Wireless communication module, plate suitable for use in manufacturing said module and method for manufacturing said module Active EP3391461B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1562609A FR3045955B1 (en) 2015-12-17 2015-12-17 WIRELESS COMMUNICATION MODULE, PLATE ADAPTED TO BE USED IN THE MANUFACTURE OF SUCH MODULE AND METHOD OF MANUFACTURING SUCH MODULE
PCT/FR2016/053452 WO2017103493A1 (en) 2015-12-17 2016-12-15 Wireless communication module, plate suitable for use in manufacturing said module and method for manufacturing said module

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EP3391461A1 EP3391461A1 (en) 2018-10-24
EP3391461B1 true EP3391461B1 (en) 2020-11-18

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WO (1) WO2017103493A1 (en)

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Publication number Priority date Publication date Assignee Title
CN108832283A (en) * 2018-06-15 2018-11-16 南京邮电大学 Novel flexible double frequency annular capsule antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060237544A1 (en) * 2005-04-25 2006-10-26 Lintec Corporation Antenna circuit, IC inlet, IC tag, and IC card, as well as manufacturing method of IC tag and manufacturing method of IC card
US20110169702A1 (en) * 2008-09-11 2011-07-14 Jan Wendisch Antenna Module for Producing a Transponder, and a Transponder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060237544A1 (en) * 2005-04-25 2006-10-26 Lintec Corporation Antenna circuit, IC inlet, IC tag, and IC card, as well as manufacturing method of IC tag and manufacturing method of IC card
US20110169702A1 (en) * 2008-09-11 2011-07-14 Jan Wendisch Antenna Module for Producing a Transponder, and a Transponder

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WO2017103493A1 (en) 2017-06-22
FR3045955B1 (en) 2018-11-16
FR3045955A1 (en) 2017-06-23
EP3391461A1 (en) 2018-10-24

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