Abstract: The invention concerns a method for partial amplitude modulation of a carrier wave between 8% and 14%, the carrier wave being emitted by a contactless transceiver device (10) designed to remotely exchange data with a contactless portable object, the method comprising: a) delivering two digital radiofrequency signals Tx1 (20) and Tx2 (22), b) phase shifting the second signal Tx2 by 180 degrees in relation to the first signal Tx1 when there is no information to be transmitted (idle state), c) phase shifting the two Tx2 signals in relation to Tx1 or Tx1 in relation to Tx2 by an additional angle ? when there is information to be transmitted (modulated state), d) having the digital signals pass through a filtering and adapting stage (13), e) adding, at the antenna, the first and second filtered and phase-modulated signals (Tx1f and Tx2f) and obtaining an amplitude modulated resultant radiated signal.

Abstract: A multilayer contactless smartcard 10 including an electronic chip embedded in the card, the chip being connected to an antenna 22 printed on a carrier layer 20, and two card bodies, one on each side of the carrier, each including at least one plastic layer 40 and 60. The antenna carrier is opaque and includes a first cut-out forming a void 23 filled with a transparent plastic; and the plastic layers of the two card bodies each include a second cut-out forming two identical voids 43 and 63 the outlines of which superimpose, in order to make a transparent zone appear in the thickness of the card, forming a transparent logo in the shape of the cut-out. A process for manufacturing such a card is also disclosed.

Abstract: A contactless portable device including a support layer and a protective layer, the support layer having, on its first side, an antenna made up of a flat winding of turns and a protective layer glued to the first side of the support layer, the antenna having two cuts, two wires and four ends including two connection ends for connecting a chip, and two ends each connected to a contact separated from one another by a narrow space so as to render the antenna open, such that the antenna is closed by flow of a current between the two contacts through the protective layer when a user places a finger on the protective layer where the contacts are located, and enabling communication between the chip and a reader associated with the contactless portable device.

Abstract: A multilayer contactless smartcard 10 including an electronic chip embedded in the card, the chip being connected to an antenna 22 printed on a carrier layer 20, and two card bodies, one on each side of the carrier, each including at least one plastic layer 40 and 60. The antenna carrier is opaque and includes a first cut-out forming a void 23 filled with a transparent plastic; and the plastic layers of the two card bodies each include a second cut-out forming two identical voids 43 and 63 the outlines of which superimpose, in order to make a transparent zone appear in the thickness of the card, forming a transparent logo in the shape of the cut-out. A process for manufacturing such a card is also disclosed.

Abstract: The invention concerns a method for manufacturing a radio frequency identification device (RFID), featuring a flat and flexible substrate made of polycarbonate equipped with an antenna (14) composed of conductive ink fully encased in the polycarbonate and a chip or integrated circuit module (29) connected to the antenna, the antenna formed by the winding of several turns features a turn overlap zone, an insulating strip of dielectric material separating the turns of the antenna in the overlap zone, the edges of the device being completely uniform so that no lines of demarcation between the various layers are visible, thereby preventing all attempt of delamination of the device over its thickness.

Abstract: The invention concerns a contactless portable object (10, 30, 60) featuring a main radiofrequency device made up of a main chip (18, 38, 68) and a main antenna (16, 36, 66) connected together so that, when the portable object enters the magnetic field of a suitable reader, the main radiofrequency device provides power to the chip and ensures communication between the chip and the reader. According to the main characteristic of the invention, the portable object includes a secondary contactless device featuring a secondary antenna (12, 32, 62) and an electric circuit set up in such a way that, when the two antennas enter the magnetic field of a suitable reader at the same time, the amount of energy required to power the electric circuit and have it operational being less than the amount of energy required to power the main chip (18, 38, 68) and have it operational, the electric circuit is powered and makes the reading of data of the main chip impossible.

Abstract: The invention concerns a contactless portable object (11) featuring an electronic circuit (14) and an antenna (12) connected together enabling coupling between the electronic circuit and a reader associated with the portable contactless object. According to the main characteristic of the invention, the contactless portable object includes a set of field indicators (18) that provide the user with a measurement of the value of a physical quantity proportional to the quantity of the electromagnetic field which passes through the antenna (12).

Abstract: A contactless portable device including a support layer and a protective layer, the support layer having, on its first side, an antenna made up of a flat winding of turns and a protective layer glued to the first side of the support layer, the antenna having two cuts, two wires and four ends including two connection ends for connecting a chip, and two ends each connected to a contact separated from one another by a narrow space so as to render the antenna open, such that the antenna is closed by flow of a current between the two contacts through the protective layer when a user places a finger on the protective layer where the contacts are located, and enabling communication between the chip and a reader associated with the contactless portable device.

Abstract: The invention concerns a method for manufacturing a radio frequency identification device (RFID), the device featuring an antenna and a chip (12) connected to the antenna, the method including the following steps: printing an antenna (12) having contacts (17 and 19) on a support (20) made of paper or synthetic paper, placing adhesive dielectric material between the contacts of the antenna, positioning an integrated circuit module (10) on the support, the module featuring groups of contacts (17, 18) and the chip (12) connected to groups of contacts inside an encapsulation (14) of the module, so that the groups of contacts of the module are opposite the contacts of the antenna, placing a thermoplastic layer (22) and a paper or synthetic paper layer (24) on the support, the two layers (22 and 24) being provided with a recess (21, 23) at the location of encapsulation (14) of the module (10), laminating together the three layers, the antenna support layer (20), the thermoplastic layer (22) and the paper or synt

Abstract: A method for manufacturing an identity booklet cover provided with a radio frequency identification device having an antenna and a chip (12) connected to the antenna, the method including the following steps: producing an antenna (12) having contacts (13 and 14) on a support (10), creating a recess (20) between the contacts (13 and 14), placing adhesive dielectric material (25, 26) near the contacts of the antenna, positioning an integrated circuit module (19) on the support so that the groups of contacts of the module are opposite the contacts of the antenna and the encapsulation of the module is in the recess (20), placing on the face of the support featuring the antenna at least one layer of thermo-adhesive film (40, 50, 60), placing a cover layer (70) on the layer (or) layer(s) (40 or 50 and 60) of thermo-adhesive film, laminating all the layers.

Abstract: A method for connecting an electronic chip (10) to contacts (47and 48) of an electric circuit, the chip having two conductive plates (31and 32) located on the last layer of the chip and at least one electromagnetic shielding layer, at least one of the plates (31or 32) being entirely covered with an electrical insulating layer (34). The method includes placing an adhesive dielectric material (40) on the circuit between the contacts (47, 48), to fix the electronic chip (10) relative to the circuit, positioning electronic chip (10) on the circuit so that conductive plates (31et 32) are opposite the contacts (47and 48), so as to create between the chip and the electric circuit at least one capacitive link made up of the conductive plate (31or 32), the electrically insulating layer and the contact (47or 48).

Abstract: Set of tickets in the form of a continuous strip (35, 85) of multilayer detachable tickets featuring, between two adjacent tickets (30 and 31, 80 and 81), cross precuts (32, 82) alternating with ticket linking bridges (33, 83), the transversal precuts being used to guide the separation of adjacent tickets when a pulling force is applied on one of the tickets. The cross precuts (32, 82) feature at their end longitudinal precuts (34, 84) that are perpendicular or oblique to cross precuts so that the linking bridges (33, 83) between two adjacent tickets play the role of hinges when the adjacent tickets are folded or are not in the same plane, thus preventing the outer layer from being subjected to more stresses than the inner layer.

Abstract: A radio frequency identification device support (2) featuring an antenna (12) screen-printed on a support (20) and a chip (10) connected to the connection terminals (17 and 19) of the antenna. According to a main characteristic of the invention, a thermoplastic layer (22) and a top layer of synthetic paper (24) are laminated on the antenna support (20) so that the antenna and the chip are trapped in the thermoplastic and the three layers (20, 22, and 24) cannot be separated and so that the device is resistant to water and humid environments.

Abstract: A radio frequency identification device support (2) featuring an antenna (12) screen-printed on a support (20) and a chip (10) connected to the connection terminals (17 and 19) of the antenna. According to a main characteristic of the invention, a thermoplastic layer (22) and a top layer of synthetic paper (24) are laminated on the antenna support (20) so that the antenna and the chip are trapped in the thermoplastic and the three layers (20, 22, and 24) cannot be separated and so that the device is resistant to water and humid environments.

Abstract: The invention concerns a radio frequency identification device (RFID) featuring an antenna (12) screen-printed on a fibrous support and a chip (10) connected to the connection terminals (17 and 19) of the antenna. According to the main characteristic of the invention, a thermoplastic layer (22) and a layer of paper (24) are laminated on the antenna support (20) so that the antenna and the chip are trapped in the thermoplastic and so that the device is resistant to water and humid environments.

Abstract: A radiofrequency identification device (RFID) featuring an antenna (10) connected to a chip designed to be affixed to an object to be identified by a remote reader transmitting to the identification device electromagnetic signals received by the antenna and containing the data allowing the identification as well as the supply voltage (VDC) of the device, the antenna transmitting in return to said reader signals provided by the chip by retromodulation by means of a switch (22) in the chip whose open or closed position defines the digital identification data transmitted by the device. The chip features a variable impedance (30) connected in series with the switch to the terminals of the antenna and a means for detecting (32) the supply voltage to adjust the impedance value so that this supply voltage is always greater than a predetermined value (Vthreshold) below which the device can no longer transmit digital identification data.

Abstract: A method for making a hybrid contact/non-contact or non-contact smart card which includes a support (10,11) on which is produced an antenna, two card bodies (32, 42, 34, 44) on either side of the support, each of the card bodies including at least one thermoplastic layer, and one chip (30) or module connected to the antenna. The method includes the following steps: depositing a layer of a material having a major amount of resin on a predetermined zone (12,13) of the antenna support; making the antenna which includes screen-printing turns (14.15) and two connection pads (16,18,17,19) of conductive polymer ink on the zone previously produced on the support, and subjecting the support to a heat treatment to cure the ink.

Abstract: Contactless label designed to ensure the traceability of an object featuring a microcircuit (16) and a Y-shaped dipole antenna connected to the microcircuit, which contains information necessary for tracing the object, which can be read with a reader through the exchange of ultra high frequency (UHF) electromagnetic waves. The antenna includes three main wires, a first main wire (10), a second main wire (12) forming a first dipole with the first main wire and a third main wire (14) forming a second dipole with the first main wire. The angle between the first and second main wires is equal to the angle between the first and the third main wires and the angle between the second main wire and the third main wire is between 60° and 180°. Each of the main wires features a secondary wire (24, 26, or 28) at its end perpendicular to the main wire.

Abstract: A multi-step method for producing contactless tickets or cards, the tickets or cards including a chip (24) which is connected to an antenna (10) on a paper carrier. The method includes: printing the antennae in series on the paper carrier strip using a silkscreen ink; fixing a chip to each ticket by connecting bond pads of the chip to the antennas' bond pads (14, 16); and covering the paper strip, including the silkscreen-printed antenna and the corresponding chip, with an adhesive paper strip. After each step, the paper carrier strip is wound up before the next step is begun. Each of the silkscreen-printed antennae is coated with a protective layer (12) to prevent silkscreen ink from being transferred to the back of the paper carrier strip during the successive winding-up following each step.

Abstract: A contactless reading system, wherein a chip card is fixed on a planar support of an object such as a book (11) for identification by means of the data contained in the chip card, and a mobile reader (16) provided with an antenna in order to read the data of the card. The antenna of the reader (16) consists of a small-sized convolution disposed in a series with a large-sized convolution, which are concentric and which have the same winding direction. A maximum value is obtained for the component (H) of the electromagnetic field produced by the antenna parallel to the antenna at a given distance from the antenna. Maximum reception by the chip card of electromagnetic signals emitted by the antenna is obtained when the antenna is disposed in a perpendicular position in relation to the support of the card and at the given distance from the card.