EP2192651A1 - Radiofrequency communication device with separate antenna - Google Patents

Radiofrequency communication device with separate antenna Download PDF

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Publication number
EP2192651A1
EP2192651A1 EP08305857A EP08305857A EP2192651A1 EP 2192651 A1 EP2192651 A1 EP 2192651A1 EP 08305857 A EP08305857 A EP 08305857A EP 08305857 A EP08305857 A EP 08305857A EP 2192651 A1 EP2192651 A1 EP 2192651A1
Authority
EP
European Patent Office
Prior art keywords
antenna
circuit
electronic circuit
usb
electronic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08305857A
Other languages
German (de)
French (fr)
Inventor
Jean-François Schuh
Didier Bonnet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales DIS France SA
Original Assignee
Gemalto SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gemalto SA filed Critical Gemalto SA
Priority to EP08305857A priority Critical patent/EP2192651A1/en
Priority to PCT/EP2009/065780 priority patent/WO2010060912A1/en
Priority to EP09760519.0A priority patent/EP2371031B1/en
Priority to JP2011537957A priority patent/JP5503664B2/en
Priority to US13/130,067 priority patent/US8670803B2/en
Publication of EP2192651A1 publication Critical patent/EP2192651A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • H01Q1/2275—Supports; Mounting means by structural association with other equipment or articles used with computer equipment associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
    • 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
    • H01Q7/02—Collapsible antennas; Retractable antennas

Definitions

  • the invention relates to the field of radio frequency communication devices.
  • the invention relates to a radiofrequency communication device comprising an electronic circuit on a support body and a radiofrequency antenna connected at least in part to the electronic circuit and defining an electromagnetic coupling surface.
  • the invention is directed to such devices comprising a USB and RF radio frequency function, in particular according to the ISO 14443, ISO 15693 or NFC (ISO 18092, ISO 21448, etc.) standard.
  • USB Such devices are known among in particular USB keys that embark RF radio function for access control applications. Although described in connection with USB, the invention applies to any communication device with electrical contacts including linear contacts as described in standards or standards MMC, SD, Express card, or ISO 7816 or other. Throughout the document, for simplicity, the term USB also means any other standard or communication protocol different from USB.
  • the radio frequency chip (RFID) will depend on the antenna surface, so it is desirable to have a USB device of a large area, which is in contradiction with the 'use classic USB devices that are usually small. These USB devices will have an efficiency or range reduced to a few centimeters, the antenna having a coupling surface at most equal to the surface or size of the key, generally 2 to 3 cm2.
  • the object of the invention is to solve these disadvantages.
  • it is preferably intended to improve the range and quality of radio frequency device communication while having a small footprint for use with equipment, especially through the USB interface of a computer.
  • the principle of the invention consists in a first radiofrequency mode of use, to deport or have the antenna of the RF device out of one or more electronic circuits or printed circuit boards (PCB), so as to reduce interference or disturbances with conductive parts of a circuit.
  • the antenna is positioned relative to this circuit so as to have a coupling surface that is as little as possible facing the circuit.
  • the device comprises a first radiofrequency communication functional configuration in which the coil-shaped antenna has at least one coupling surface portion (inside the widest turn) devoid of an electronic circuit directly opposite. ;
  • the device in the use mode with electrical contact (USB), the device preferably comprises a functional configuration in which the antenna is arranged so as to free the bulk of the device or at least not to interfere with its connection or other USB stick connection to other ports or terminal connectors or computer.
  • the invention consists in having an antenna that is mobile and / or removable and / or flexible relative to the electronic circuit or a main body (generally rigid) of the device.
  • the subject of the invention is a radiofrequency communication device comprising an electronic circuit on a support body, a radiofrequency antenna connected at least in part to the electronic circuit and defining an electromagnetic coupling surface;
  • the device is distinguished in that the antenna comprises a coupling functional position substantially distinct from a viewing position of the electronic support.
  • a radiofrequency communication device 1a comprises a gripping support body 2a and an antenna 3;
  • this device also comprises a contact connector 4, here a USB type connector;
  • the invention may not include an electrical contact connector in one embodiment or the radio frequency communication is improved.
  • the device comprises a certain surface "S1" or space in top view (or for example, in cross section parallel to the plane of a possible connector 4);
  • the gripping support body 2a here an outer shell, comprises an electronic circuit 5a (not visible) which extends inside; Where appropriate, the body may be directly a printed circuit board (PCB) or support plate of any electronic circuit.
  • PCB printed circuit board
  • the circuit may include conductive tracks, connections and / or electronic and / or electrical components such as a block of connectors with elastic blades or other.
  • the device may comprise components for performing a USB function, a radiofrequency function, possibly arranged in a separate card. These circuit elements are capable of disturbing the radiofrequency communication established using at least one radiofrequency antenna turn 3 which is arranged close to the electronic circuit.
  • the antenna coil 3 defines an electromagnetic coupling surface "S2" inside the coil.
  • the antenna 3 has at least a coupling surface portion S2 which is free of any electronic circuit and / or conductive tracks arranged directly facing or substantially facing.
  • the antenna is external to the main rigid body 2a; on the other hand, the antenna is configured as a loop such as a key ring ring, extending to the rear of the device.
  • the loop includes the turns of the antenna without support and forms a circular frame in itself.
  • the loop is preferably coated with a protective material and / or mechanical reinforcement of the turns. It may be an elastomeric or plastic material, especially rubber.
  • the antenna thus configured has the advantage of having a surface S2 which is remote from the disturbances of the main body 2a.
  • This loop has an elasticity provided either by the coating or sheathing or by the material of the turns, for example steel.
  • this configuration allows to hang or grasp the device.
  • the antenna When in contact mode, the antenna has several degrees of freedom: it can therefore be moved in several directions and thus not interfere with another possible connection of another device to connect to another port. 'computer.
  • the antenna is here also movable relative to the electronic circuit, particularly at a junction joint 9 to the body 2a.
  • the device 2b has the same means as above, and the elements having the same numbers in the figures being similar, the letters associated with the numbers being relative to the specific mode. This applies to all figures.
  • the device in the form of USB key comprises means for retracting the antenna inside the device; They comprise a slideway 6 in which a button 7 slides to actuate this operation.
  • the device comprises a sheath 8 along the body which is adapted to receive the antenna in the retracted position. Inside, the antenna is elastic, adopts an oval shape (or other shape) to be contained in the sheath.
  • the antenna is connected to the electronic circuit by connection means which follow the movement as a ribbon or a flexible two-wire wire.
  • the antenna is here mobile and retractable relative to the electronic circuit to be extracted from an internal position in which it is opposite the device and to adopt a free external position of field to capture the field electromagnetic.
  • the antenna is as flexible compared to the electronic circuit.
  • the device 2c takes the form of a USB key and the elements with the same numbers being identical or similar as before.
  • the antenna 3c is disposed in a cover 10c which is articulated with respect to the body of the device by means of a hinge 11.
  • the cover could also be movable differently with respect to the internal circuit in the rigid main body 2c.
  • the cover could slide relative to the body so as to deport the antenna at least partly out of a surface facing the electronic circuit contained in the body.
  • the antenna In the extended position of the lid figure 3b , the antenna has its free coupling surface to capture an electromagnetic field to the extent that it is offset from the main body. In this position, the communication range is larger or more efficient.
  • the connection position with electrical contacts the device remains thin, narrow in deployed position or not without hindering other keys.
  • the device comprises removable means for retracting the body 2f said main or at least the internal electronic circuit, the latter being housed in or on a cap.
  • the antenna is made here in a cover or cap 10d which has receiving means 15 for fixing or receiving the main body containing the electronic circuit and connect it, if necessary.
  • the antenna 3d is a passive antenna only which serves as a relay for another antenna arranged in the main body 2d which carries out the radio frequency transponder function.
  • the passive antenna if present, has a capacitance at both ends.
  • the cap includes a receiving space 15 of the main body; At the bottom of this space are connection points 13d or a connector adapted to connect one or more electronic components performing the radiofrequency communication function in the body 2d.
  • connection points may be related to contact points of the support body which are accessible from outside the support body. For example, connection lines opening at the USB connector 4 as explained in more detail in the figure 5 . However, these connection points of the antenna can also lead to any other place provided for this purpose of the support body 2d.
  • the cap 10d has a total area S1 which is much larger than that of the body 2d;
  • the antenna has portions S1a and S1b which are not directly opposite the body and are therefore well exposed to the electromagnetic field of a external reading terminal.
  • a shutter 40 closes this reception space 15.
  • the device is convenient to carry in one block in its assembled configuration and slip into a bag or other to achieve access control.
  • the coupling surface of the antenna is calculated according to the bulk of the body so as to have the required range.
  • simply extract the body 2d of the case 10d, here a USB key to find a narrower body or end and the connect to the USB port and perform USB communication without disturbing other connections.
  • caps of different sizes and ranges can be chosen according to the user's need, for example, according to the placement of the device on him, in a bag and the manner of presenting it to a reader.
  • the invention therefore makes it possible, because of the removable function of the antenna, a customization of the radiofrequency device at the level of the range.
  • the device 1e comprises a cap 16 substantially in accordance with the previous figure and comprises the antenna 3e;
  • the same reference numbers representing the same elements, even with slight variations represented by different letters associated.
  • the device comprises a connection circuit 18a, 18b to the antenna which is arranged at least partly on the support body 19 and which extends at least a part of the electronic and / or electrical circuit 23, 24 to points of connection of the antenna 20, 21. These points are accessible from outside the support body.
  • the device comprises a USB connector (4) comprising Vbus (20) and GND (21) tracks and the connection circuits 18a, 18b are respectively connected to these tracks.
  • the junction with the electronic circuit is here materialized by electrical connection pads 23, 24 of a chip card connector 25.
  • the RF circuit is contained in a smart card 25, but it could be disposed in the electronic circuit of the support body.
  • connection circuit 18a, 18b comprises two capacitors C1, C2 each disposed between the electronic / electrical circuit 23, 24 and the connection points 20, 21 and a protection circuit of the USB circuit for filtering the signal RF superimposed on Vbus.
  • the USB circuit has a protection against the radiofrequency signals picked up and conveyed by the antenna.
  • This protection is here a shock choke placed at the input of the USB circuit.
  • the antenna is housed in a removable cap 16 which is able to connect the two antenna ends to the Vbus and GND tracks respectively.
  • the cap thus comprises means of connection to the USB connector able to enter the connector and connect the Vbus and GND tracks.
  • the connector is a USB complementary connector of which only two tracks are connected by the antenna.
  • the device of the invention in its preferred version constitutes or comprises a portion 26 performing a USB smart card reader function 25;
  • the electronic circuit of the invention comprises the circuit of the USB reader and an ISO connector 22 for connecting the smart card 25, which itself comprises an electronic circuit with dual ISO / RF interface.
  • the antenna comprises a field presence indicator disposed in the cap (not shown).
  • This indicator can be for example a vibrator or a sound or light indicator.
  • a circuit comprising one or more LEDs can be placed on the antenna circuit so as to produce a light effect that can be customized to the user's choice (pattern, color, etc.)
  • the user can thus be made to use between several indicator caps the one that will produce the indicator according to the use in question.
  • the cap of the figure 5 can, if necessary, be attached to the rear of the device at connection points specifically prepared for this purpose.
  • a PCB of the key may have connecting tracks extending rearward and accessible through a slot in the hull.
  • the cap may comprise a flat portion protruding corresponding to the slot and carrying the tracks of the antenna. This protrusion once introduced into the slot causes the ohmic contact of the antenna with the connection tracks to the electronic circuit and / or RF.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)
  • Transceivers (AREA)

Abstract

The device (1e) has gripping support bodies (2d) provided with a surface. Electrical/electronical circuits (23, 24, 26) extend in the support bodies. Antennas (3e) include radiofrequency antenna turns arranged close to the electrical/electronical circuits, and define an electromagnetic coupling surface (S2) at inside of the turns. Each antenna includes coupling surface portions which are arranged free from the electrical/electronical circuits. Connection circuits (18a, 18b) are respectively connected to tracks of Universal serial bus connector (4).

Description

L'invention concerne le domaine des dispositifs de communication radiofréquence.The invention relates to the field of radio frequency communication devices.

En particulier, l'invention vise un dispositif de communication radiofréquence comprenant un circuit électronique sur un corps support et une antenne radiofréquence reliée au moins en partie au circuit électronique et définissant une surface de couplage électromagnétique.In particular, the invention relates to a radiofrequency communication device comprising an electronic circuit on a support body and a radiofrequency antenna connected at least in part to the electronic circuit and defining an electromagnetic coupling surface.

Plus particulièrement, l'invention vise de tels dispositifs comportant une fonction USB et radiofréquence RF, notamment selon la norme ISO 14443, ISO 15693, ou de type NFC (ISO18092, ISO21481, etc.)More particularly, the invention is directed to such devices comprising a USB and RF radio frequency function, in particular according to the ISO 14443, ISO 15693 or NFC (ISO 18092, ISO 21448, etc.) standard.

Elle trouve application notamment au chargement de données par internet, notamment de droits d'accès, abonnement, à des services tels que transport, téléphonie, par une interface à contact et utilisation de ces données dans un mode radiofréquence en relation avec des bornes radiofréquences ou inversement.It finds application in particular to the loading of data by internet, in particular access rights, subscription, to services such as transport, telephony, by a contact interface and use of these data in a radio frequency mode in connection with radiofrequency terminals or Conversely.

De tels dispositifs sont connus parmi notamment des clés USB qui embarquent une fonction radiofréquence RF pour des applications de contrôle d'accès. Bien que décrit en relation avec l'USB, l'invention s'applique à tout dispositif de communication à contacts électriques notamment contacts linéaires tels que décrits dans les standards ou normes MMC, SD, Express card, ou ISO 7816 ou autre. Dans tout le document, par simplification, le terme USB signifie également tout autre standard ou protocole de communication différent d'USB.Such devices are known among in particular USB keys that embark RF radio function for access control applications. Although described in connection with USB, the invention applies to any communication device with electrical contacts including linear contacts as described in standards or standards MMC, SD, Express card, or ISO 7816 or other. Throughout the document, for simplicity, the term USB also means any other standard or communication protocol different from USB.

La capacité à télé-alimenter à travers l'antenne la puce radiofréquence (RFID) va dépendre de la surface de l'antenne, il est donc souhaitable d'avoir un dispositif USB d'une grande surface, ce qui est en contradiction avec l'usage classique des dispositifs USB qui sont en général petits. Ces dispositifs USB auront donc une efficacité ou portée assez réduite de l'ordre de quelques centimètres, l'antenne ayant une surface de couplage au plus égale à la surface ou encombrement de la clé, généralement 2 à 3 cm2.The ability to tele-power through the antenna the radio frequency chip (RFID) will depend on the antenna surface, so it is desirable to have a USB device of a large area, which is in contradiction with the 'use classic USB devices that are usually small. These USB devices will have an efficiency or range reduced to a few centimeters, the antenna having a coupling surface at most equal to the surface or size of the key, generally 2 to 3 cm2.

L'invention a pour objet de résoudre ces inconvénients. En particulier, elle vise de préférence à améliorer la portée et la qualité de communication de dispositif radiofréquence tout en ayant un encombrement réduit pour une utilisation avec un équipement, notamment à travers l'interface USB d'un ordinateur.The object of the invention is to solve these disadvantages. In particular, it is preferably intended to improve the range and quality of radio frequency device communication while having a small footprint for use with equipment, especially through the USB interface of a computer.

Le principe de l'invention consiste selon un premier mode d'utilisation radiofréquence, à déporter ou avoir l'antenne du dispositif RF hors d'un ou plusieurs circuits électroniques ou plaques de circuits imprimés (PCB), de manière de réduire des interférences ou perturbations avec des parties conductrices d'un circuit. L'antenne est positionnée par rapport à ce circuit de manière à avoir une surface de couplage qui soit le moins possible en regard du circuit.The principle of the invention consists in a first radiofrequency mode of use, to deport or have the antenna of the RF device out of one or more electronic circuits or printed circuit boards (PCB), so as to reduce interference or disturbances with conductive parts of a circuit. The antenna is positioned relative to this circuit so as to have a coupling surface that is as little as possible facing the circuit.

Autrement dit, le dispositif comporte une première configuration fonctionnelle de communication radiofréquence dans laquelle l'antenne en forme de spires présente au moins une portion de surface de couplage (à l'intérieur de la spire la plus large) dépourvue de circuit électronique directement en regard;In other words, the device comprises a first radiofrequency communication functional configuration in which the coil-shaped antenna has at least one coupling surface portion (inside the widest turn) devoid of an electronic circuit directly opposite. ;

D'autre part, en mode d'utilisation à contact électrique (USB), le dispositif comprend de préférence, une configuration fonctionnelle dans laquelle l'antenne est agencée de manière à libérer de l'encombrement du dispositif ou du moins, ne pas gêner sa connexion ou une autre connexion de clés USB aux autres ports ou connecteurs de terminaux ou ordinateur.On the other hand, in the use mode with electrical contact (USB), the device preferably comprises a functional configuration in which the antenna is arranged so as to free the bulk of the device or at least not to interfere with its connection or other USB stick connection to other ports or terminal connectors or computer.

Selon un mode de réalisation plus concret, l'invention consiste à avoir une antenne qui soit mobile et/ou amovible et/ou souple par rapport au circuit électronique ou un corps principal (généralement rigide) du dispositif.According to a more concrete embodiment, the invention consists in having an antenna that is mobile and / or removable and / or flexible relative to the electronic circuit or a main body (generally rigid) of the device.

A cet effet, l'invention a pour objet un dispositif de communication radiofréquence comprenant un circuit électronique sur un corps support, une antenne radiofréquence reliée au moins en partie au circuit électronique et définissant une surface de couplage électromagnétique; Le dispositif se distingue en ce que l'antenne comporte une position fonctionnelle de couplage sensiblement distincte d'une position de regard du support électronique.For this purpose, the subject of the invention is a radiofrequency communication device comprising an electronic circuit on a support body, a radiofrequency antenna connected at least in part to the electronic circuit and defining an electromagnetic coupling surface; The device is distinguished in that the antenna comprises a coupling functional position substantially distinct from a viewing position of the electronic support.

Selon d'autres caractéristiques du dispositif :

  • le dispositif comprend un circuit de connexion à l'antenne disposé au moins en partie sur le corps support et s'étendant du circuit électronique jusqu'à des points de connexion de l'antenne, lesdits points étant accessibles de l'extérieur du corps support;
  • il comprend un connecteur USB comportant des pistes Vbus et GND, les points de connexion de l'antenne étant respectivement reliés à ces pistes et l'antenne ayant ses deux connexions reliée à ces pistes;
  • le circuit de connexion comporte deux capacités disposées chacune entre le circuit électronique et les points de connexion et un circuit de protection du circuit USB;
  • l'antenne est logée dans un capuchon amovible apte à connecter les deux extrémités d'antenne aux pistes Vbus et GND respectivement.
    Grâce à cette disposition, le dispositif USB présente à la fois un aspect compact, une configuration de protection mécanique et électrique du connecteur et une position fonctionnelle optimale de couplage électromagnétique;
  • il comprend un lecteur USB de carte à puce, le circuit électronique étant un circuit du lecteur USB comportant un connecteur ISO pour connecter la carte à puce, la carte à puce comportant un circuit électronique à interface duale ISO/RF;
According to other features of the device:
  • the device comprises an antenna connection circuit arranged at least partly on the support body and extending from the electronic circuit to the connection points of the antenna, said points being accessible from outside the support body ;
  • it comprises a USB connector comprising Vbus and GND tracks, the connection points of the antenna being respectively connected to these tracks and the antenna having its two connections connected to these tracks;
  • the connection circuit comprises two capacitors each disposed between the electronic circuit and the connection points and a protection circuit of the USB circuit;
  • the antenna is housed in a removable cap capable of connecting the two antenna ends to the Vbus and GND tracks respectively.
    With this arrangement, the USB device has both a compact appearance, a configuration of mechanical and electrical protection of the connector and an optimal functional position of electromagnetic coupling;
  • it includes a USB smart card reader, the electronic circuit being a circuit of the USB reader having an ISO connector for connecting the card chip, the chip card comprising an electronic circuit with dual ISO / RF interface;

D'autres particularités et avantages de l'invention apparaîtront à la lecture de la description, faite à titre d'exemple non limitatif et en regard des dessins annexés sur lesquels :

  • La figure 1 illustre schématiquement la structure d'un dispositif portable conforme à l'invention selon un premier mode de réalisation avec des moyens souples de l'antenne;
  • La figure 2 illustre schématiquement la structure d'un dispositif portable conforme à l'invention selon un deuxième mode de réalisation avec des moyens escamotables de l'antenne ;
  • La figure 3 illustre schématiquement la structure d'un dispositif portable conforme à l'invention selon un troisième mode de réalisation avec des moyens mobiles, amovibles ou articulés de l'antenne;
  • Les figures 3a, 3b illustrent le dispositif vue de profil avec l'antenne en position fermée et déployée respectivement des moyens amovibles de l'antenne;
  • La figure 4 illustre schématiquement la structure d'un dispositif portable conforme à l'invention selon un quatrième mode de réalisation avec des moyens amovibles permettant d'escamoter ou insérer le corps par rapport à l'antenne;
  • La figure 5 illustre schématiquement la structure d'un dispositif portable conforme à l'invention selon un cinquième mode de réalisation avec des moyens amovibles de l'antenne.
Other features and advantages of the invention will become apparent on reading the description, given by way of nonlimiting example and with reference to the appended drawings in which:
  • The figure 1 schematically illustrates the structure of a portable device according to the invention according to a first embodiment with flexible means of the antenna;
  • The figure 2 schematically illustrates the structure of a portable device according to the invention according to a second embodiment with retractable means of the antenna;
  • The figure 3 schematically illustrates the structure of a portable device according to the invention according to a third embodiment with movable, removable or articulated means of the antenna;
  • The Figures 3a, 3b illustrate the device seen in profile with the antenna in the closed position and deployed respectively detachable means of the antenna;
  • The figure 4 schematically illustrates the structure of a portable device according to the invention according to a fourth embodiment with removable means for retracting or inserting the body relative to the antenna;
  • The figure 5 schematically illustrates the structure of a portable device according to the invention according to a fifth embodiment with removable means of the antenna.

A la figure 1, un dispositif de communication radiofréquence 1a conforme à l'invention comprend un corps support de préhension 2a et une antenne 3; Dans l'exemple, ce dispositif comprend également un connecteur à contact 4, ici un connecteur de type USB; Toutefois, l'invention peut ne pas comporter de connecteur à contact électrique dans un mode de réalisation ou la communication radiofréquence est améliorée.To the figure 1 , a radiofrequency communication device 1a according to the invention comprises a gripping support body 2a and an antenna 3; In the example, this device also comprises a contact connector 4, here a USB type connector; However, the invention may not include an electrical contact connector in one embodiment or the radio frequency communication is improved.

Le dispositif comprend une certaine surface "S1" ou encombrement en vue de dessus (ou par exemple, en section transversale parallèle au plan d'un connecteur éventuel 4);
Le corps support de préhension 2a, ici une coque externe, comprend un circuit électronique 5a (non visible) qui s'étend à l'intérieur; Le cas échéant, le corps peut être directement une plaque de circuit imprimé (PCB) ou plaque support d'un circuit électronique quelconque.The device comprises a certain surface "S1" or space in top view (or for example, in cross section parallel to the plane of a possible connector 4);
The gripping support body 2a, here an outer shell, comprises an electronic circuit 5a (not visible) which extends inside; Where appropriate, the body may be directly a printed circuit board (PCB) or support plate of any electronic circuit.

Le circuit peut comprendre notamment des pistes conductrices, des connexions et/ou des composants électroniques et/ou électriques tels qu'un bloc de connecteurs à lames élastiques ou autres. Comme on le verra plus loin, le dispositif peut comprendre des composants pour réaliser une fonction USB, une fonction radiofréquence, éventuellement disposés dans une carte distincte. Ces éléments de circuits sont susceptibles de perturber la communication radiofréquence établie à l'aide d'au moins une spire d'antenne radiofréquence 3 qui est disposée à proximité du circuit électronique.The circuit may include conductive tracks, connections and / or electronic and / or electrical components such as a block of connectors with elastic blades or other. As will be seen below, the device may comprise components for performing a USB function, a radiofrequency function, possibly arranged in a separate card. These circuit elements are capable of disturbing the radiofrequency communication established using at least one radiofrequency antenna turn 3 which is arranged close to the electronic circuit.

La spire d'antenne 3 définit une surface de couplage électromagnétique "S2" à l'intérieur de la spire.The antenna coil 3 defines an electromagnetic coupling surface "S2" inside the coil.

Conformément à une caractéristique de l'invention, l'antenne 3 présente au moins une portion de surface de couplage S2 qui est libre de tout circuit électronique et/ou pistes conductrices disposés directement en regard ou sensiblement en regard.
Dans l'exemple, l'antenne est externe au corps rigide principal 2a; d'autre part, l'antenne est configurée sous forme d'une boucle tel un anneau de porte clés, s'étendant à l'arrière du dispositif. La boucle comprend les spires de l'antenne sans support et forme une armature circulaire en elle-même. La boucle est enrobée de préférence d'un matériau de protection et/ou renforcement mécanique des spires. Ce peut être un matériau élastomère ou plastique, notamment du caoutchouc.According to a characteristic of the invention, the antenna 3 has at least a coupling surface portion S2 which is free of any electronic circuit and / or conductive tracks arranged directly facing or substantially facing.
In the example, the antenna is external to the main rigid body 2a; on the other hand, the antenna is configured as a loop such as a key ring ring, extending to the rear of the device. The loop includes the turns of the antenna without support and forms a circular frame in itself. The loop is preferably coated with a protective material and / or mechanical reinforcement of the turns. It may be an elastomeric or plastic material, especially rubber.

L'antenne ainsi configurée a l'avantage de présenter une surface S2 qui est éloignée des perturbations du corps principal 2a.
Cette boucle présente une élasticité apportée soit par l'enrobage ou gainage soit par le matériau des spires, par exemple en acier.The antenna thus configured has the advantage of having a surface S2 which is remote from the disturbances of the main body 2a.
This loop has an elasticity provided either by the coating or sheathing or by the material of the turns, for example steel.

De manière avantageuse, cette configuration permet d'accrocher ou saisir le dispositif. Quand il est en mode de connexion à contact, l'antenne possède plusieurs degrés de liberté: elle peut de ce fait être déplacée dans plusieurs directions et ne pas gêner ainsi une autre éventuelle connexion d'un autre dispositif à connecter sur un autre port d'ordinateur.Advantageously, this configuration allows to hang or grasp the device. When in contact mode, the antenna has several degrees of freedom: it can therefore be moved in several directions and thus not interfere with another possible connection of another device to connect to another port. 'computer.

L'antenne est ici également mobile par rapport au circuit électronique notamment au niveau d'une articulation de jonction 9 au corps 2a.The antenna is here also movable relative to the electronic circuit, particularly at a junction joint 9 to the body 2a.

A la figure 2, le dispositif 2b comporte les mêmes moyens que ci-dessus, et les éléments comportant les mêmes numéros sur les figures étant similaires, les lettres associées aux numéros étant relatives au mode spécifique. Cela s'applique à toutes les figures.To the figure 2 , the device 2b has the same means as above, and the elements having the same numbers in the figures being similar, the letters associated with the numbers being relative to the specific mode. This applies to all figures.

Dans cet exemple, le dispositif sous forme de clé USB, comporte des moyens permettant d'escamoter l'antenne à l'intérieur du dispositif ; Ils comprennent une glissière 6 dans lequel coulisse un bouton 7 pour actionner cette opération. Le dispositif comprend un fourreau 8 le long du corps qui est apte à recevoir l'antenne en position escamotée. A l'intérieur, l'antenne étant élastique, adopte une forme ovale (ou autre forme) pour être contenue dans le fourreau.In this example, the device in the form of USB key, comprises means for retracting the antenna inside the device; They comprise a slideway 6 in which a button 7 slides to actuate this operation. The device comprises a sheath 8 along the body which is adapted to receive the antenna in the retracted position. Inside, the antenna is elastic, adopts an oval shape (or other shape) to be contained in the sheath.

A l'intérieur, l'antenne est reliée au circuit électronique par des moyens de connexion qui suivent le déplacement comme un ruban ou un fil bifilaire souple. L'antenne est ici mobile et escamotable par rapport au circuit électronique pour être extraite d'une position interne dans laquelle elle est en regard du dispositif et adopter une position externe libre de champ pour capter le champ électromagnétique. L'antenne est aussi souple par rapport au circuit électronique.Internally, the antenna is connected to the electronic circuit by connection means which follow the movement as a ribbon or a flexible two-wire wire. The antenna is here mobile and retractable relative to the electronic circuit to be extracted from an internal position in which it is opposite the device and to adopt a free external position of field to capture the field electromagnetic. The antenna is as flexible compared to the electronic circuit.

A la figure 3, le dispositif 2c prend la forme d'une clé USB et les éléments comportant les mêmes numéros étant identiques ou similaires comme précédemment.
Dans ce mode de réalisation, l'antenne 3c est disposée dans un couvercle 10c qui est articulé par rapport au corps du dispositif à l'aide d'une charnière 11.
Le couvercle pourrait également être mobile différemment par rapport au circuit 5 interne dans le corps principale rigide 2c. Par exemple, le couvercle pourrait glisser par rapport au corps de manière à déporter l'antenne au moins en partie hors d'une surface en regard du circuit électronique contenu dans le corps.
En position déployée du couvercle figure 3b, l'antenne présente sa surface de couplage libre pour capter un champ électromagnétique dans la mesure où elle est déportée par rapport au corps principal. Dans cette position, la portée de communication est plus grande ou plus efficace.
En position de connexion avec contacts électriques, le dispositif demeure fin, étroit en position déployé ou non sans gêner d'autres clés.To the figure 3 , the device 2c takes the form of a USB key and the elements with the same numbers being identical or similar as before.
In this embodiment, the antenna 3c is disposed in a cover 10c which is articulated with respect to the body of the device by means of a hinge 11.
The cover could also be movable differently with respect to the internal circuit in the rigid main body 2c. For example, the cover could slide relative to the body so as to deport the antenna at least partly out of a surface facing the electronic circuit contained in the body.
In the extended position of the lid figure 3b , the antenna has its free coupling surface to capture an electromagnetic field to the extent that it is offset from the main body. In this position, the communication range is larger or more efficient.
In the connection position with electrical contacts, the device remains thin, narrow in deployed position or not without hindering other keys.

A la figure 4, le dispositif selon un troisième mode de réalisation comporte des moyens amovibles permettant d'escamoter le corps 2f dit principal ou du moins le circuit électronique interne, celui-ci étant logé dans ou sur un capuchon.
L'antenne est réalisée ici dans un couvercle ou capuchon 10d qui présente des moyens de réception 15 permettant de fixer ou recevoir le corps principal contenant le circuit électronique et le connecter, le cas échéant.To the figure 4 , the device according to a third embodiment comprises removable means for retracting the body 2f said main or at least the internal electronic circuit, the latter being housed in or on a cap.
The antenna is made here in a cover or cap 10d which has receiving means 15 for fixing or receiving the main body containing the electronic circuit and connect it, if necessary.

Dans une variante, l'antenne 3d est une antenne passive uniquement qui sert de relais à une autre antenne disposée dans le corps principal 2d qui réalise la fonction de transpondeur radiofréquence. L'antenne passive le cas échéant comporte une capacité aux deux extrémités.In a variant, the antenna 3d is a passive antenna only which serves as a relay for another antenna arranged in the main body 2d which carries out the radio frequency transponder function. The passive antenna, if present, has a capacitance at both ends.

Le capuchon comprend un espace de réception 15 du corps principal; Au fond de cet espace se trouvent des points de connexion 13d ou un connecteur adapté à connecter un ou des composants électroniques réalisant la fonction de communication radiofréquence dans le corps 2d.The cap includes a receiving space 15 of the main body; At the bottom of this space are connection points 13d or a connector adapted to connect one or more electronic components performing the radiofrequency communication function in the body 2d.

Les points de connexion peuvent être mis en relation avec des points de contact du corps support qui sont accessibles de l'extérieur du corps support. Par exemple, des lignes de connexion débouchant au niveau du connecteur USB 4 comme expliqué plus en détail à la figure 5.
Cependant, ces points de connexion de l'antenne peuvent aussi déboucher à tout autre endroit prévu à cet effet du corps support 2d.The connection points may be related to contact points of the support body which are accessible from outside the support body. For example, connection lines opening at the USB connector 4 as explained in more detail in the figure 5 .
However, these connection points of the antenna can also lead to any other place provided for this purpose of the support body 2d.

Le capuchon 10d présente une surface totale S1 qui est largement supérieure à celle du corps 2d; Lorsque le corps est fixé au capuchon ou support d'antenne 10d ou reçu à l'intérieur, l'antenne présente des portions S1 a et S1b qui ne sont pas directement en regard du corps et sont donc bien exposées au champ électromagnétique d'une borne externe de lecture. Un obturateur 40 ferme cet espace de réception 15.The cap 10d has a total area S1 which is much larger than that of the body 2d; When the body is fixed to the cap or antenna support 10d or received inside, the antenna has portions S1a and S1b which are not directly opposite the body and are therefore well exposed to the electromagnetic field of a external reading terminal. A shutter 40 closes this reception space 15.

Grâce à ces dispositions, le dispositif est pratique à emporter en un seul bloc dans sa configuration assemblée et à glisser dans un sac ou autre pour réaliser un contrôle d'accès.With these provisions, the device is convenient to carry in one block in its assembled configuration and slip into a bag or other to achieve access control.

La surface de couplage de l'antenne est calculée en fonction de l'encombrement du corps de manière à avoir la portée requise. En outre, lorsqu'il s'agit de se connecter à internet via un port d'ordinateur, il suffit d'extraire le corps 2d de l'étui 10d, ici une clé USB, pour retrouver un corps plus étroit ou fin et le connecter au port USB et réaliser une communication USB sans gêner d'autres connexions.The coupling surface of the antenna is calculated according to the bulk of the body so as to have the required range. In addition, when it comes to connect to the internet via a computer port, simply extract the body 2d of the case 10d, here a USB key, to find a narrower body or end and the connect to the USB port and perform USB communication without disturbing other connections.

Le cas échéant, différents capuchons de tailles et portées différentes peuvent être choisis selon le besoin de l'utilisateur, par exemple, selon le placement du dispositif sur lui, dans un sac et la manière de la présenter à un lecteur. L'invention permet donc du fait de la fonction amovible de l'antenne une personnalisation du dispositif radiofréquence au niveau de la portée.If necessary, different caps of different sizes and ranges can be chosen according to the user's need, for example, according to the placement of the device on him, in a bag and the manner of presenting it to a reader. The invention therefore makes it possible, because of the removable function of the antenna, a customization of the radiofrequency device at the level of the range.

A la figure 5, selon un cinquième mode de réalisation avec des moyens amovibles de l'antenne, le dispositif 1e comporte un capuchon 16 sensiblement conforme à la figure précédente et comporte l'antenne 3e; Comme précédemment, les mêmes numéros de référence représentant les mêmes éléments, même avec de légères variations représentées par des lettres différentes associées.To the figure 5 , according to a fifth embodiment with removable means of the antenna, the device 1e comprises a cap 16 substantially in accordance with the previous figure and comprises the antenna 3e; As before, the same reference numbers representing the same elements, even with slight variations represented by different letters associated.

Selon une caractéristique, le dispositif comprend un circuit de connexion 18a, 18b à l'antenne qui est disposé au moins en partie sur le corps support 19 et qui s'étend d'au moins une partie du circuit électronique et/ou électrique 23, 24 jusqu'à des points de connexion de l'antenne 20, 21. Ces points sont accessibles de l'extérieur du corps support.According to one characteristic, the device comprises a connection circuit 18a, 18b to the antenna which is arranged at least partly on the support body 19 and which extends at least a part of the electronic and / or electrical circuit 23, 24 to points of connection of the antenna 20, 21. These points are accessible from outside the support body.

Selon une caractéristique de l'invention, le dispositif comprend un connecteur USB (4) comportant des pistes Vbus (20) et GND (21) et les circuits de connexion 18a, 18b sont respectivement reliés à ces pistes.According to one characteristic of the invention, the device comprises a USB connector (4) comprising Vbus (20) and GND (21) tracks and the connection circuits 18a, 18b are respectively connected to these tracks.

La jonction au circuit électronique est ici matérialisée par des plots de connexion électriques 23, 24 d'un connecteur pour carte à puce 25. Dans l'exemple, le circuit RF est contenu dans une carte à puce 25, mais il pourrait être disposé dans le circuit électronique du corps support.The junction with the electronic circuit is here materialized by electrical connection pads 23, 24 of a chip card connector 25. In the example, the RF circuit is contained in a smart card 25, but it could be disposed in the electronic circuit of the support body.

Selon une autre caractéristique, le circuit de connexion 18a, 18b comporte deux capacités C1, C2 disposées chacune entre le circuit électronique / électrique 23, 24 et les points de connexion 20, 21 et un circuit de protection du circuit USB destinée à filtrer le signal RF superposé à Vbus.According to another characteristic, the connection circuit 18a, 18b comprises two capacitors C1, C2 each disposed between the electronic / electrical circuit 23, 24 and the connection points 20, 21 and a protection circuit of the USB circuit for filtering the signal RF superimposed on Vbus.

Le circuit USB comporte une protection par rapport aux signaux radiofréquence captés et véhiculés par l'antenne. Cette protection est ici une self de choc placée à l'entrée du circuit USB.The USB circuit has a protection against the radiofrequency signals picked up and conveyed by the antenna. This protection is here a shock choke placed at the input of the USB circuit.

Selon une caractéristique, l'antenne est logée dans un capuchon amovible 16 qui est apte à connecter les deux extrémités d'antenne aux pistes Vbus et GND respectivement.
Le capuchon comprend donc des moyens de connexion au connecteur USB aptes à rentrer dans le connecteur et connecter les pistes Vbus et GND. Typiquement, le connecteur est un connecteur complémentaire USB dont deux pistes seulement sont reliées par l'antenne.According to one characteristic, the antenna is housed in a removable cap 16 which is able to connect the two antenna ends to the Vbus and GND tracks respectively.
The cap thus comprises means of connection to the USB connector able to enter the connector and connect the Vbus and GND tracks. Typically, the connector is a USB complementary connector of which only two tracks are connected by the antenna.

Le dispositif de l'invention dans sa version préférée constitue ou comprend une partie 26 réalisant une fonction de lecteur USB de carte à puce 25; Le circuit électronique de l'invention comprend le circuit du lecteur USB et un connecteur ISO 22 pour connecter la carte à puce 25, elle-même comportant un circuit électronique à interface duale ISO/ RF.The device of the invention in its preferred version constitutes or comprises a portion 26 performing a USB smart card reader function 25; The electronic circuit of the invention comprises the circuit of the USB reader and an ISO connector 22 for connecting the smart card 25, which itself comprises an electronic circuit with dual ISO / RF interface.

Selon une caractéristique, l'antenne comprend un indicateur de présence de champ disposé dans le capuchon (non représenté). Cet indicateur peut être par exemple un vibreur ou un indicateur sonore ou lumineux. Par exemple, un circuit comportant une ou plusieurs diode(s) "led" peut être placé sur le circuit d'antenne de manière à produire un effet lumineux qui peut être personnalisé au choix de l'utilisateur (motif, couleur etc.)According to one characteristic, the antenna comprises a field presence indicator disposed in the cap (not shown). This indicator can be for example a vibrator or a sound or light indicator. For example, a circuit comprising one or more LEDs can be placed on the antenna circuit so as to produce a light effect that can be customized to the user's choice (pattern, color, etc.)

L'utilisateur peut ainsi être amené à utiliser entre plusieurs capuchons à indicateur celui qui produira l'indicateur selon l'usage considéré.The user can thus be made to use between several indicator caps the one that will produce the indicator according to the use in question.

Selon une autre variante de réalisation, le capuchon de la figure 5, peut le cas échéant être fixé à l'arrière du dispositif sur des points de connexion spécifiquement préparés à cet effet. Par exemple, UN PCB de la clé peut avoir des pistes de connexion se prolongeant vers l'arrière et accessibles à travers une fente ménagée dans la coque.According to another variant embodiment, the cap of the figure 5 can, if necessary, be attached to the rear of the device at connection points specifically prepared for this purpose. For example, a PCB of the key may have connecting tracks extending rearward and accessible through a slot in the hull.

De son côté, le capuchon peut comprendre une portion plate en excroissance correspondant à la fente et portant les pistes de l'antenne. Cette excroissance une fois introduite dans la fente provoque le contact ohmique de l'antenne avec les pistes de connexion au circuit électronique et /ou RF.For its part, the cap may comprise a flat portion protruding corresponding to the slot and carrying the tracks of the antenna. This protrusion once introduced into the slot causes the ohmic contact of the antenna with the connection tracks to the electronic circuit and / or RF.

Claims (10)

Dispositif de communication radiofréquence comprenant : - un corps support de préhension (1 a- 1 e) présentant une surface (S1), - un circuit électronique et/ ou électrique (23, 24, 26) s'étendant dans le corps support de préhension, - au moins une antenne (3a-3e) comportant une spire d'antenne radiofréquence disposée à proximité du circuit électronique (26) et définissant une surface de couplage électromagnétique (S2) à l'intérieur de la spire, caractérisé en ce que l'antenne présente au moins une portion de surface de couplage (S2, S1a, S1b) qui est libre de tout circuit électronique et/ou électrique disposé directement en regard.Radio frequency communication device comprising: a support body (1a-1e) having a surface (S1), an electronic and / or electrical circuit (23, 24, 26) extending in the gripping support body, at least one antenna (3a-3e) comprising a radiofrequency antenna turn disposed near the electronic circuit (26) and defining an electromagnetic coupling surface (S2) inside the coil, characterized in that the antenna has at least a coupling surface portion (S2, S1a, S1b) which is free of any electronic and / or electrical circuit disposed directly opposite. Dispositif selon la revendication précédente, caractérisé en ce que l'antenne (3a-3e) est mobile par rapport au circuit électronique.Device according to the preceding claim, characterized in that the antenna (3a-3e) is movable relative to the electronic circuit. Dispositif selon l'une quelconque des revendications 1 à 2, caractérisé en ce que l'antenne (3a-3e) est amovible par rapport au circuit électronique.Device according to any one of claims 1 to 2, characterized in that the antenna (3a-3e) is removable relative to the electronic circuit. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'antenne (3a-3e) est souple par rapport au circuit électronique.Device according to any one of claims 1 to 3, characterized in that the antenna (3a-3e) is flexible relative to the electronic circuit. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un circuit de connexion (18a, 18b) à l'antenne, disposé au moins en partie dans le corps support (1a- 1e) et s'étendant du circuit électronique (23, 24, 26) jusqu'à des points de connexion (20, 21) de l'antenne, lesdits points étant accessibles de l'extérieur du corps support.Device according to claim 1, characterized in that it comprises a connection circuit (18a, 18b) to the antenna arranged at least partly in the support body (1a-1e) and extending from the electronic circuit (23). , 24, 26) to connection points (20, 21) of the antenna, said points being accessible from outside the support body. Dispositif selon la revendication précédente, caractérisé en ce qu'il comprend un connecteur USB comportant des pistes (20) et (21), ledit circuit de connexion (18a, 18b) étant relié à ces pistes.Device according to the preceding claim, characterized in that it comprises a USB connector comprising tracks (20) and (21), said connection circuit (18a, 18b) being connected to these tracks. Dispositif selon l'une quelconque des revendications 5 à 6, caractérisé en ce que le circuit de connexion comporte deux capacités (C1, C2) disposées chacune entre le circuit électronique (22, 23, 26) et les points de connexion (20, 21) et un circuit de protection du circuit USB constitué d'une self de choc destinée à filtrer le signal RF.Device according to any one of claims 5 to 6, characterized in that the connection circuit comprises two capacitors (C1, C2) each arranged between the electronic circuit (22, 23, 26) and the connection points (20, 21). ) and a protection circuit of the USB circuit consisting of a shock choke for filtering the RF signal. Dispositif selon l'une quelconque des revendications 5 à 6, caractérisé en ce que l'antenne est logée dans un capuchon amovible (10d) apte à connecter les deux extrémités d'antenne aux pistes (20, 21) respectivement.Device according to any one of claims 5 to 6, characterized in that the antenna is housed in a removable cap (10d) adapted to connect both ends of the antenna traces (20, 21) respectively. Dispositif selon l'une quelconque des revendications 5 à 6, caractérisé en ce qu'il comprend un lecteur USB de carte à puce, le circuit électronique étant un circuit du lecteur USB (26), comportant un connecteur ISO (22) pour connecter la carte à puce (25), la carte à puce comportant un circuit électronique à interface duale ISO/ RF.Device according to any one of claims 5 to 6, characterized in that it comprises a USB smart card reader, the electronic circuit being a circuit of the USB reader (26), comprising an ISO connector (22) for connecting the chip card (25), the chip card comprising an electronic circuit with dual ISO / RF interface. Dispositif selon la revendication 9, caractérisé en ce que l'antenne comprend un indicateur de présence de champ électromagnétique disposé dans le capuchon.Device according to claim 9, characterized in that the antenna comprises an electromagnetic field presence indicator disposed in the cap.
EP08305857A 2008-11-27 2008-11-27 Radiofrequency communication device with separate antenna Withdrawn EP2192651A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP08305857A EP2192651A1 (en) 2008-11-27 2008-11-27 Radiofrequency communication device with separate antenna
PCT/EP2009/065780 WO2010060912A1 (en) 2008-11-27 2009-11-24 Radiofrequency communication device with an offset antenna
EP09760519.0A EP2371031B1 (en) 2008-11-27 2009-11-24 Funkkommunikationsvorrichtung mit separater antenne
JP2011537957A JP5503664B2 (en) 2008-11-27 2009-11-24 Wireless communication device with offset antenna
US13/130,067 US8670803B2 (en) 2008-11-27 2009-11-24 Radiofrequency communication device with an offset antenna

Applications Claiming Priority (1)

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EP08305857A EP2192651A1 (en) 2008-11-27 2008-11-27 Radiofrequency communication device with separate antenna

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EP2192651A1 true EP2192651A1 (en) 2010-06-02

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EP09760519.0A Not-in-force EP2371031B1 (en) 2008-11-27 2009-11-24 Funkkommunikationsvorrichtung mit separater antenne

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Also Published As

Publication number Publication date
EP2371031B1 (en) 2017-06-21
WO2010060912A1 (en) 2010-06-03
JP5503664B2 (en) 2014-05-28
EP2371031A1 (en) 2011-10-05
JP2012510227A (en) 2012-04-26
US8670803B2 (en) 2014-03-11
US20110230147A1 (en) 2011-09-22

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