Abstract: The invention relates to a radio frequency device including an antenna connected to a capacitor. Said capacitor includes first and second conductive plates that are opposite each other and separated by an insulator. At least one of said first and second plates is formed of a plurality of wire capacitor portions. Said radio frequency device is different in that the antenna and at least one capacitor plate are formed with wire portions placed on a substrate in a guided manner.

Abstract: The invention relates to a portable electronic device comprising a supporting member receiving on one side conductive contact lands or tracks extending substantially as far as the edge of the side and connecting an electronic microcircuit, the conductive contact lands or tracks comprising a plurality of perforations. The device is noteworthy in that the interior of the perforations is free, or intended to be kept free, of metal.

Abstract: The invention relates to a radiofrequency device comprising a passive antenna tuned or intended to be tuned in frequency with at least one transponder, said transponder comprising an integrated circuit chip linked to an antenna interface defining an electromagnetic coupling surface periphery, said passive antenna comprising a main loop formed of turns comprising at least one portion of surface (B) inside the loop, at least one recess of the main loop, oriented from the interior to the exterior of the main loop, said portion of surface (B) being located in said recess so as to effect an electromagnetic coupling with a transponder circuit; the device is distinguished in that it comprises two recesses receiving or intended to receive a transponder each.

Abstract: A device having an integrated-circuit chip includes an insulating body containing at least one conductive pad, at least one electrical contact opposite the electrically conductive pad, and at least one recess in the body, including a bottom and one aperture. The recess is connected, at the bottom thereof, to the conductive pad and, at the aperture thereof, to the electrical contact. At least one coil spring is arranged in the recess and connecting the conductive pad to the electrical contact. The installation of the spring in the recess is facilitated by means of the friction of the central portion of the spring relative to the walls of the recess. The invention also relates to a method for producing an electrical connection between at least one conductive pad arranged in an insulating body and at least one electrical contact arranged opposite the electrically conductive pad.

Abstract: The invention relates to a warning device for signaling the presence of a radio frequency communication. The system includes an indicator perceptible to a user and an activation circuit to sense or detect energy originating from the communication and to activate the indicator. The device is distinguished in that the indicator is a vibrator. The invention also relates to a radio frequency communication device, such as a chip card, a passport, an insert, a mobile telephone, having the warning system, and a method of fabrication.

Abstract: The invention concerns a method for adjusting frequency tuning of a resonant circuit with turns having a regular spacing generating stray inter-turn capacity. The adjusting of the frequency tuning of the resonant circuit is performed, at the level of the stray inter-turn capacity, by varying the regular spacing of adjacent turns on at least one zone of the antenna. The invention uses this adjusting method for producing an adjusted antenna for a resonant circuit, the resonant circuit and a non-contact product. The invention concerns a device programmed for antenna production and/or definition.

Abstract: The invention relates to an electronic radiofrequency-transaction device that comprises a first switch capable of providing a radiofrequency operation of the device upon actuation of the switch and an operation stop when the actuation is released. The device is characterised in that it comprises a timer circuit capable of maintaining, after the actuation of the first switch, a continuous radiofrequency operation for a duration at least equal to the duration of a transaction to be carried out. The invention also relates to a smart card containing the device and to a module for an electronic radiofrequency-transaction device.

Abstract: Method of producing a device comprising at least two distinct components that are interconnected by interconnecting wires, and device thereby obtained. The invention relates to a method of producing a device having at least two distinct components which are interconnected on a substrate by at least one interconnecting wire. The method includes the following steps: creating the interconnecting wire by depositing individual wires on the substrate in a predefined interconnecting pattern, the wire comprising at least one terminal connection portion which is exposed on the substrate, bringing at least one contact of a component to face the terminal portion and connecting the contact to this terminal portion. The invention also relates to the device thereby obtained and to a multi-component product comprising same.

Abstract: The invention relates to a warning device for signaling the presence of a radio frequency communication. The system includes an indicator perceptible to a user and an activation circuit to sense or detect energy originating from the communication and to activate the indicator. The device is distinguished in that the indicator is a vibrator. The invention also relates to a radio frequency communication device, such as a chip card, a passport, an insert, a mobile telephone, having the warning system, and a method of fabrication.

Abstract: A method for producing radiofrequency communication devices with or without an operation switch and devices obtained. The invention relates to a method for producing a radiofrequency communication device comprising an electronic component, an antennae circuit associated with the electronic component and a switch on the circuit capable of switching off the antennae circuit; the method being differentiated in that comprises the following steps: —the antennae (22) is made with a portion in the form of a closed circuit (15, 17) in a reception zone of the switch, —an interrupting zone (I) of the antennae circuit is created on the said portion at least by removing matter from the antenna. The invention also relates to the resulting devices.

Abstract: A contactless transponder includes an antenna and an electronic module placed on a substrate and connected to the antenna by a conducting wire passing through the contact pads in the form of at least one stitch. The module is produced as a single block, having at least one integrated circuit and contact pads. The module is transferred to the substrate before connection to the antenna.

Abstract: The invention concerns a method for adjusting frequency tuning of a resonant circuit with turns having a regular spacing generating stray inter-turn capacity. The adjusting of the frequency tuning of the resonant circuit is performed, at the level of the stray inter-turn capacity, by varying the regular spacing of adjacent turns on at least one zone of the antenna. The invention uses this adjusting method for producing an adjusted antenna for a resonant circuit, the resonant circuit and a non-contact product. The invention concerns a device programmed for antenna production and/or definition.