Patent application number | Description | Published |
20080198078 | Adjusting Resonance Frequency by Adjusting Distributed Inter-Turn Capacity - 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. | 08-21-2008 |
20100273469 | WARNING SYSTEM FOR SIGNALING THE PRESENCE OF A RADIO FREQUENCY COMMUNICATION AND MANUFACTURING METHOD - 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. | 10-28-2010 |
20140131453 | RADIOFREQUENCY TRANSPONDER DEVICE WITH OPTIMIZED PASSIVE RESONANT CIRCUIT - 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. | 05-15-2014 |
20140152511 | PORTABLE DEVICE WITH APERTURED ELECTRICAL CONTACTS - 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. | 06-05-2014 |
20140285395 | MECHANICALLY RESISTANT LOOP ANTENNA FOR A PASSPORT - The invention relates to an antenna for a radio frequency transponder comprising a flat base with a longitudinal edge, an antenna for receiving via electromagnetic coupling on the base, said edge being intended to be parallel to a binding of the booklet, said antenna comprising parallel and perpendicular coils that extend respectively parallel and perpendicular to the longitudinal edge; the transponder is characterized in that said parallel coils have close-together inter-coil spacing at least in an area of binding of the booklet with respect to the inter-coil spacing of the perpendicular coils. The invention also relates to a portable electronic object including said transponder. | 09-25-2014 |