EP3016201B1 - Dispositif d'antenne - Google Patents

Dispositif d'antenne Download PDF

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Publication number
EP3016201B1
EP3016201B1 EP14190924.2A EP14190924A EP3016201B1 EP 3016201 B1 EP3016201 B1 EP 3016201B1 EP 14190924 A EP14190924 A EP 14190924A EP 3016201 B1 EP3016201 B1 EP 3016201B1
Authority
EP
European Patent Office
Prior art keywords
slot
antenna
slot antenna
antenna device
circuit board
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.)
Not-in-force
Application number
EP14190924.2A
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German (de)
English (en)
Other versions
EP3016201A1 (fr
Inventor
Matthias Lungwitz
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.)
Gigaset Communications GmbH
Original Assignee
Gigaset Communications GmbH
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 Gigaset Communications GmbH filed Critical Gigaset Communications GmbH
Priority to EP14190924.2A priority Critical patent/EP3016201B1/fr
Publication of EP3016201A1 publication Critical patent/EP3016201A1/fr
Application granted granted Critical
Publication of EP3016201B1 publication Critical patent/EP3016201B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support

Definitions

  • the present invention relates to the field of antenna technology. It relates to an antenna device with at least two slot antennas for transmitting and / or receiving electromagnetic waves of a wavelength ⁇ , each slot antenna having a metallically conductive surface in which a slot, in particular with a length of ⁇ / 2, is formed.
  • the invention also relates to a radio device with such an antenna device and a key fob that has such a radio device.
  • the electromagnetic field of the antenna device is at least partially shielded by the metallic housing of the radio application. This usually results in a change in the radiation characteristics. In certain applications, this can advantageously be used to achieve a desired directional effect of the antenna device. In other applications, in particular in mobile radio applications, a more spherical emission characteristic is desirable because the radio application can be aligned in any way with respect to a radio partner.
  • the object of the invention is to specify an antenna device which enables a radio application to be designed with a metallic housing and an approximately spherical radiation characteristic.
  • the US 2004 0239575 A1 describes a mobile phone with a groove antenna.
  • the slot antenna is defined as having a small dimension and implemented by opening one edge end of a slot antenna.
  • the object of the invention is to improve the performance of the antenna together with the provision of a sufficient broadband characteristic.
  • an antenna device is provided with at least two slot antennas for transmitting and / or receiving electromagnetic waves of a wavelength ⁇ , each slot antenna having a metallically conductive surface in which a slot, in particular with a length of ⁇ / 2, is formed, the Areas with a distance d smaller than ⁇ / 10 are arranged parallel to each other, so that a flat space is formed between two surfaces, the flat space is at least partially closed by at least one metallic conductive side surface, so that energy in the form of the electromagnetic field is exclusively can be emitted through the slots, the metallically conductive surfaces are electrically conductively connected to one another via at least the one metallically conductive lateral surface, the slots in the metallically conductive surfaces are formed uniformly, the uniform slots are arranged congruently to one another and with at least one slot antenna as the first Slot antenna is formed which has a signal terminal via which it is electrically fed, and at least one slot antenna is formed as a second slot antenna which has no signal terminal, the second slot antenna being set electromagnetically in resonance
  • Such an antenna device has the advantage that the at least two slot antennas interact and together have an approximately symmetrical, approximately spherical radiation characteristic.
  • the second slot antenna is operated in resonance with the first slot antenna.
  • the electromagnetic field emitted by the first slot antenna can be viewed as being emitted on both sides of the surface in relation to its surface.
  • the side of the surface that is arranged in the direction of the second slot antenna is referred to as being on the inside, and that side of the surface that is arranged facing away from the second slot antenna is referred to as being on the outside.
  • the field radiated from the inside of the first slot antenna excites the second slot antenna from its inside.
  • the second slot antenna excited in this way emits its electromagnetic field to the inside as well as to the outside in such a way that essentially equally strong fields are formed on both sides of the slot antenna.
  • the space enclosed by the surfaces of the slot antennas and the side surface is completely electromagnetically sealed so that energy in the form of the electromagnetic field can only be emitted through the slots, the energy released inwards by the first slot antenna is predominantly through the second slot antenna released to the outside world.
  • the outer sides of the surfaces virtually jointly emit an electromagnetic field which corresponds to that of a dipole and is therefore approximately spherical.
  • the first slot antenna, the second slot antenna and the at least one metallically conductive side surface form a housing that is set up to house an electrical circuit, in particular a radio circuit.
  • a metallic housing which is suitable for accommodating radio applications, for example a radio key, a signal transmitter or the like, which has an integrated antenna and whose antenna has an almost spherical radiation characteristic.
  • Both cuboid and round, for example cylindrical, housings can be designed.
  • the lateral surface and the surface of a slot antenna can adjoin one another or merge into one another in such a way that they are designed as a single, for example concave, surface.
  • the housing advantageously has a lens shape, for example.
  • the housing is furthermore advantageously completely closed off by the first and the at least one second slot antenna, see above that energy can be emitted in electromagnetic form from the interior of the housing exclusively via the slots of the slot antennas that form the housing.
  • an outer housing can advantageously be formed by means of the housing that is designed.
  • An outer metallic housing offers special options with regard to a desired design, in particular a look and feel.
  • the first slot antenna advantageously has a circuit board, the metallic surface of which forms the metallically conductive surface and the slot being designed as a recess in the metallic surface of the circuit board.
  • a circuit board the metallic surface of which forms the metallically conductive surface and the slot being designed as a recess in the metallic surface of the circuit board.
  • the electrical circuit is advantageously arranged at least partially on the printed circuit board and is electrically connected to the signal connection of the first slot antenna.
  • the signal connection can take place, for example, via a symmetrical or asymmetrical line with, for example, one or more feed points.
  • the first and the second slot antenna advantageously have the same shortening factor.
  • the first and the second slot antenna advantageously have the same structural dimensions and the slots have the same dielectrics.
  • the slot in the first slot antenna can be through a recess in the conductive layer or layers of a printed circuit board be trained. It is advantageous for the flat space in the area of the slot antenna to be filled with a compound which has the dielectric constant of the circuit board in order to achieve a uniform shortening factor. By designing the flat space with materials of the same dielectric constant, a constant wavelength can be achieved within the antenna device, so that the same shortening factor applies to the first and the second slot antenna.
  • the flat intermediate space can be designed with materials of the same wavelength by using one or more plastic elements that are inserted between the printed circuit board and the housing.
  • the space can be injected with a dielectric compound.
  • the slot can also be mechanically closed to the outside at the same time.
  • components of the electrical circuit in the plane of the printed circuit board to the slot in the printed circuit board are at least a fifth of the distance d between the surfaces of the slot antennas, in particular at least one millimeter apart. Interactions between the field of the slot antenna and the electrical component can be reduced by a minimum distance between the components and the slot in the circuit board. For the same reason, the flat space between the slots of the slot antennas is advantageously free of a potential overhang of a component.
  • the slot is also advantageously arranged in the edge region of the surface. Positioning the slot in the edge region of the surface of the slot antenna enables good utilization of the flat space, in particular for arranging larger components such as a flat battery cell.
  • the antenna device has two second slot antennas and a first slot antenna, the second slot antennas together with the at least one lateral surface forming a cavity and the first slot antenna being arranged in the cavity.
  • a second slot antenna is excited by the first slot antenna on both sides according to the principle already described. If, apart from the slots, the cavity is electromagnetically closed, radiation takes place exclusively via the two second slot antennas.
  • a spherical emission characteristic is advantageously supported by the symmetrical arrangement.
  • such an embodiment offers the advantage that it is robust and at the same time very easy to manufacture.
  • the cavity can advantageously be formed by a metallically conductive extruded profile, in particular on the basis of a rectangular profile.
  • the longitudinal and transverse surfaces of the extruded profile are connected to one another in an electrically conductive manner.
  • the surfaces of the second slot antennas can be formed through the longitudinal surfaces of the extruded profile and two lateral surfaces can be formed through the transverse surfaces of the extruded profile.
  • the ends of the extruded profile can be locked by caps, lids or inserts, in particular made of metal.
  • the first slot antenna can advantageously be inserted / removed from the cavity.
  • the first slot antenna is for example in grooves that are arranged in the lateral surfaces can be inserted.
  • Such an embodiment in particular when the slot antenna is formed from a printed circuit board, offers the advantage of being easy to manufacture.
  • such a drawer or box principle offers the possibility of removing the slot antenna in order, for example, to change a battery arranged on the same circuit board.
  • the housing is advantageously completely metallically conductive and completely closed off, so that energy in electromagnetic form can be emitted from the interior of the housing exclusively via the slots of the slot antennas.
  • At least the surface of a second slot antenna in combination with a lateral surface forms an overall round, concave surface.
  • this is suitable for covering a first, possibly flat, slot antenna.
  • the first slot antenna can be covered on its second side by a second, likewise concave, second slot antenna, so that overall a lens-shaped arrangement can be formed.
  • the edges of the concave surfaces can be pressed together for electromagnetic sealing and for establishing an electrical connection.
  • a lighting means in particular a luminescent diode, from which light can be emitted to the outside through at least one of the slots of the antenna device, is furthermore advantageously arranged in the flat intermediate space.
  • Such an embodiment offers the advantage of twofold Use of the slot.
  • the slot By emitting an electromagnetic radio signal, the slot is suitable for sending and / or receiving a radio signal for communication with a radio partner.
  • the slot by emitting an optical signal, the slot is suitable for transmitting information to, for example, a human user.
  • the flat space furthermore advantageously has a light-sensitive component, in particular a photoresistor or a photodiode, from which light incident into the antenna device through at least one of the slots can be detected.
  • the shape of the slots in the surfaces of the slot antennas is advantageously adapted to the outer contour of the surface.
  • the metallic surfaces have an at least partially round shape, the slots having an arc shape or a C shape.
  • the metallic surfaces have a rectangular shape, the slots having an L-shape or an I-shape.
  • a radio device is also provided with an antenna device according to one of the embodiments described above, in which the radio device has an electrical circuit designed as a radio circuit and an energy source, which are arranged in the flat space, and wherein the electrical circuit is electrically connected to the signal connection of the antenna device connected is.
  • a radio application has a metallic housing with an integrated antenna device and an approximately spherical radiation characteristic.
  • the radio device is advantageously designed in such a way that the first slot antenna is formed from a circuit board and the energy source is arranged on the circuit board.
  • the radio device also advantageously has a wake-up mechanism by means of which it can be put into operation without making electrical contact.
  • the radio device is advantageously designed, for example, in such a way that the at least one metallically conductive side surface or several metallically conductive side surfaces completely enclose the flat space and the radio circuit has a reed contact via which it can be magnetically controlled.
  • Such an embodiment offers the advantage that the radio circuit can be put into operation by applying a magnetic field despite a closed, metallically conductive housing.
  • a key fob is also provided, the key fob having a radio device according to one of the embodiments described above and the antenna device forming the housing of the key fob.
  • the key fob advantageously has a passage, in particular for the attachment of a key ring, the diameter 2r of the passage with 2r ⁇ ⁇ being well below the wavelength ⁇ .
  • the metallic surfaces of the slot antennas each advantageously have the slot in a first edge region and the passage in a second edge region, the first edge region being arranged opposite the second edge region on the surface.
  • the key fob is used in conjunction with metallic keys, there is a risk that one slot or both slots of the antenna device will be covered by one or more keys and thus the antenna properties of the key fob will be impaired. This risk is increased if the key fob and key are placed next to each other on the same key ring.
  • Common keys have a key head with a hole or passage and a key bit. If the key and key fob are arranged together on a key ring, their alignment is often synchronized due to the alignment of their passages through the key ring and the alignment of the key bit due to gravity. This leads to the fact that the heads of several keys or also a key head and the key fob often come to lie directly next to one another or on top of one another.
  • the key fob has the embodiment described above and if the diameter of a round key fob, for example, is larger than that of an average key, the risk of a slot being covered can be significantly reduced by arranging the slot in the opposite edge region.
  • the key fob has a lighting means, in particular a luminescent diode, from which light can be emitted to the outside through at least one of the slots of the antenna device. In this way, it is possible to visually signal to a user, for example, that the key fob has received a specific signal. If the key fob has a slot-covering plastic film or a dielectric compound, this is advantageously made transparent.
  • the key fob has at least one light guide. The at least one light guide is arranged in such a way that light can be transmitted from the luminescent diode to at least one slot through the at least one light guide.
  • the aforementioned method offers the advantage that a layer by layer Construction of the antenna device takes place, which brings a number of manufacturing advantages with it.
  • the invention is explained in more detail below with reference to the attached drawings on the basis of preferred embodiments.
  • Figure 1 shows a perspective illustration of a first exemplary embodiment of a radio device 100 according to the invention based on a first exemplary embodiment of an antenna device 1 according to the invention.
  • the antenna device 1 off Fig. 1 comprises two slot antennas 2, 3 for transmitting and / or receiving electromagnetic waves of a wavelength ⁇ , each slot antenna 2, 3 having a metallically conductive surface 4 in which a slot 5, in particular with a length of ⁇ / 2, is formed.
  • the surfaces 4 are arranged parallel to one another at a distance d smaller than ⁇ / 10, so that a flat space is formed between two surfaces 4.
  • the flat interspace is closed all around by a plurality of metallically conductive lateral surfaces 6.
  • the metallically conductive surfaces 4 are connected to one another in an electrically conductive manner via the metallically conductive lateral surfaces 6.
  • a slot antenna 2, 3 is designed as a first slot antenna 2 in that it has a signal connection 7 via which it is electrically excitable.
  • Another slot antenna 2, 3 is designed as a second slot antenna 3 in that it does not have a signal connection 7.
  • the second slot antenna 3 is arranged parallel to the first slot antenna 2 in such a way that it can be electromagnetically excited by the latter.
  • the first slot antenna 2, the second slot antenna 3 and the metallic conductive side surfaces 6 form an outer housing of a radio circuit 100 which houses an electrical circuit 8, an energy source 9 and an LED 10.
  • the housing is closed off by the first slot antenna 2, the second slot antenna 3 and the metallic conductive side surfaces 6, so that energy can be emitted in electromagnetic form from the interior of the housing via the slots 5 of the slot antennas 2, 3.
  • the first slot antenna 2 is formed from a circuit board, the metallic surface of which forms the metallically conductive surface 4 and the slot 5 being formed by a recess in the metallic surface of the circuit board.
  • the signal connection 7 of the slot antenna 2 is also formed from one, possibly the same, metallic surface of the printed circuit board. It connects the first slot antenna 2 to the electrical circuit 8, which is arranged on the same circuit board.
  • the energy source 9 in the form of a button cell and the LED 10 are also arranged on the same circuit board.
  • the components of the electrical circuit 8, the energy source 9 and the LED 10 are at a distance of more than than in the plane of the printed circuit board from the slot 5 in the printed circuit board one fifth of the distance d between the surfaces 4 of the slot antennas 2, 3 to one another.
  • the space between the first slot antenna 2 and the second slot antenna 3 is, not visible in the drawing, filled with a compound which has the same dielectric constant as the circuit board. An electromagnetic wave is therefore not refracted at the transition between the printed circuit board and the space, and the wavelength is not changed.
  • the first slot antenna 2 and the second slot antenna 3 have the same structural dimensions.
  • the mass closes the slot 5 of the first slot antenna 2. The mass is transparent so that light from the LED 10 can be emitted through the slots 5 from the antenna device 1 or the radio device 100 to the outside.
  • the radio arrangement 100 is optionally painted.
  • the slot 5 in the second slot antenna 3 is thus not visible.
  • a lacquer layer or a plastic layer is advantageously designed in such a way that it is at least partially translucent.
  • the slot 5 is arranged in the edge area of the metallically conductive surface 4, so that larger components such as the energy source 9 in the form of a flat battery cell could be arranged in the flat space without violating the minimum distance to the slots 5.
  • the shape of the slots 5 in the surfaces 4 of the slot antennas 2, 3 is adapted to the outer contour of the surface 4.
  • a passage 11 for the attachment of the radio arrangement 100 to a key ring has a Diameter 2r, which with 2r ⁇ ⁇ is well below the wavelength ⁇ .
  • the slots 5 of the slot antennas 2, 3 are each arranged in a first edge region of the surfaces 4, which is opposite a second edge region in which the passage 11 is arranged on the surfaces 4.
  • Figure 2 shows a perspective illustration of a second exemplary embodiment of an antenna device 1 according to the invention.
  • the second embodiment of an antenna device 1 corresponds to that of the first embodiment, with the difference that the antenna device 1 has two second slot antennas 3 and a first slot antenna 2, the second slot antennas 3 together with metallic lateral surfaces 6 forming a cavity, and in the cavity the first slot antenna 2 is arranged.
  • the first slot antenna 2 can be implemented in the direction 12 from the cavity, or can be introduced into the cavity 12 counter to the direction 12.
  • the first slot antenna 2 is formed from a printed circuit board.
  • a drawer or box principle thus offers the possibility of removing the first slot antenna 2 in order, for example, to change an energy source 9 arranged on the same circuit board, i.e. for example a battery.
  • radiation is carried out via the second slot antennas 3, which are likewise from the first slot antenna 2 located centrally between them can be excited.
  • the symmetry of the arrangement supports the almost spherical radiation pattern.
  • Figure 3 shows a perspective view of a first exemplary embodiment of a key fob 200 according to the invention based on a third exemplary embodiment of an antenna device 1 according to the invention.
  • the structure of the antenna device corresponds to that of the first exemplary embodiment.
  • the passage 11 of the key fob 200 is arranged in an edge area of the slot antennas 2, 3, which is opposite a different edge area, in which the slot 5 is arranged, on the surface 4 of the slot antenna 2, 3.
  • the metallic surfaces 4 have an at least partially round shape, the slots 5 having an arc shape or a C shape.
  • the length of the slots 5 is half the wavelength ⁇ / 2.
  • the Figures 5 and 6 show by way of example the radiation characteristics of an exemplary embodiment according to Fig. 3 in the horizontal as well as the vertical plane.
  • Figure 4 shows a vertical section of an embodiment of a key fob 200 not according to the invention based on an embodiment of an antenna device 1 not according to the invention.
  • the surfaces 4 of the second slot antennas 3 in combination with the side surfaces 6 form an overall round, concave surface.
  • the combination of the metallic conductive surface 4 and the metallic conductive surface in this case, which is ring-shaped lateral surface 6 each forms the shape of a hood. This hood can also be made in one piece.
  • a first, flat slot antenna 2 is covered on both sides by the hood, so that overall a lens-shaped arrangement results.
  • the key fob 200 corresponds to that in Fig. 2 embodiment of a radio arrangement 100 shown. From the point of view of the axial axis 13, the external appearance corresponds to that in FIG Fig. 3 embodiment shown.
  • Figure 5 shows the radiation characteristics of a pattern of a key fob according to FIG Fig. 3 in the vertical plane.
  • a radiation that is approximately symmetrical to the axes of a Cartesian coordinate system and, overall, a roughly uniform radiation in the radial direction can be seen.
  • Figure 6 shows the radiation characteristics of a pattern of a key fob according to FIG Fig. 3 in the horizontal plane.
  • the expected radiation characteristics of a dipole can be seen slightly rotated by 30 °.

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  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)

Claims (14)

  1. Dispositif d'antenne (1) avec au moins deux antennes à fentes (2), (3) permettant l'envoi et/ou la réception d'ondes électromagnétiques de longueur d'onde λ, où chaque antenne à fente (2), (3) présente une surface (4) métallique conductrice dans laquelle une fente (5), notamment avec une longueur de λ/2, est formée,
    caractérisé en ce que
    les surfaces (4) sont disposées avec un espace d inférieur à λ/10 parallèles les unes par rapport aux autres, de sorte qu'un espace intermédiaire plan est formé entre deux surfaces (4),
    l'espace intermédiaire plan est fermé au moins partiellement par au moins une surface (6) métallique conductrice latérale de sorte que de l'énergie sous la forme du champ électromagnétique peut être émise exclusivement à travers les fentes,
    les surfaces (4) métalliques conductrices sont reliées ensemble de manière électriquement conductrice par le biais de l'au moins une surface (6) métallique conductrice latérale,
    les fentes (5) dans les surfaces (4) métalliques conductrices latérales sont conçues de forme identique,
    les fentes (5) de forme identique sont disposées en se superposant les unes aux autres, et
    dans lequel au moins une antenne à fente (2), (3) est conçue comme étant la première antenne à fente (2), qui présente une connexion de signal (7), par laquelle elle est alimentée électriquement, et
    au moins une antenne à fente (2), (3) est conçue comme étant la deuxième antenne à fente (3), qui ne présente aucune connexion de signal (7),
    dans lequel la deuxième antenne à fente (3) est décalée de la première antenne à fente (2) de manière électromagnétique en résonance par rapport à la première antenne (2).
  2. Dispositif d'antenne (1) selon la revendication 1, caractérisé en ce qu'un boitier est formé par la première antenne à fente (2), par la deuxième antenne à fente (3) et l'au moins une surface (6) métallique conductrice latérale, de sorte que, pour une incorporation d'un circuit électrique (8), on a notamment installé un circuit radio.
  3. Dispositif d'antenne (1) selon l'une des revendications précédentes, caractérisé en ce que la première antenne à fente (2) présente un circuit imprimé dont la surface métallique forme la surface (4) métallique conductrice et la fente (5) est conçue sous forme d'évidement dans la surface métallique du circuit imprimé.
  4. Dispositif d'antenne (1) selon la revendication 3, caractérisé en ce que le circuit électrique (8) est disposé au moins partiellement sur le circuit imprimé et est relié électriquement avec la connexion de signal (7) de la première antenne à fente (2).
  5. Dispositif d'antenne (1) selon la revendication 3 ou la revendication 4, caractérisé en ce que l'espace intermédiaire plan dans la zone de l'antenne à fente (2), (3) est rempli avec une masse, qui présente la constante diélectrique du circuit imprimé, pour atteindre un facteur de raccourcissement uniforme.
  6. Dispositif d'antenne (1) selon l'une des revendications 3 à 5, caractérisé en ce que des composants du circuit (8) électrique dans le plan de la surface du circuit imprimé présentent, en plus de la fente (5) dans le circuit imprimé, au moins un espace d'un cinquième de la distance d des surfaces des antennes à fentes (2), (3) l'un par rapport à l'autre.
  7. Dispositif d'antenne (1) selon l'une des revendications précédentes, caractérisé en ce que la fente (5) est disposée dans la zone de bordure de la surface (4).
  8. Dispositif d'antenne (1) selon l'une des revendications précédentes, caractérisé en ce que, dans l'espace intermédiaire plan, il est disposé un système d'éclairage (10), notamment une diode de luminescence, à partir de laquelle de la lumière est émise vers l'extérieur par au moins une des fentes (5) du dispositif d'antenne (1).
  9. Dispositif radio (100) doté d'un dispositif d'antenne (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif radio (100) présente un circuit (8) électrique conçu sous forme de circuit radio et une source d'énergie (9), qui sont disposés dans l'espace intermédiaire plan, où le circuit (8) électrique est relié électriquement avec la connexion de signal (7) du dispositif d'antenne (1).
  10. Dispositif radio (100) selon la revendication 9, caractérisé en ce que le dispositif d'antenne (1) est conçu selon la revendication 3 et la source d'énergie (9) est disposée sur le circuit imprimé.
  11. Dispositif radio (100) selon la revendication 9 ou la revendication 10, caractérisé en ce que l'au moins une surface métallique conductrice latérale ou que plusieurs surfaces (6) métalliques conductrices latérales entourent totalement l'espace intermédiaire plan et le circuit radio présente un contact reed par l'intermédiaire duquel il peut être démarré.
  12. Dispositif d'antenne (1) avec au moins deux deuxièmes antennes à fente (3) et une première antenne à fente (2) pour l'envoi et/ou la réception d'ondes électromagnétiques de longueur d'onde λ, où chaque antenne à fente (2), (3) présente une surface (4) métallique conductrice dans laquelle une fente (5), notamment avec une longueur de λ/2 est formée,
    caractérisé en ce que
    les surfaces (4) sont disposées avec un espace d inférieur à λ/10 parallèles les unes par rapport aux autres, de sorte qu'une cavité est formée entre deux surfaces (4),
    où les deuxièmes antennes à fentes (3) forment, ensemble avec au moins une surface latérale (6), la cavité, et la première antenne à fente (2) est disposée dans la cavité,
    où la cavité est fermée au moins partiellement par l'au moins une surface (6) métallique conductrice latérale,
    les surfaces (4) métalliques conductrices sont reliées ensemble de manière électriquement conductrice par le biais de l'au moins une surface (6) métallique conductrice latérale,
    les fentes (5) sont conçues de forme identique dans les surfaces (4) métalliques conductrices latérales,
    les fentes (5) de forme identique sont disposées en se superposant les unes aux autres et
    dans lequel la première antenne à fente (2) présente une connexion de signal (7) par laquelle elle est alimentée électriquement, et
    les deuxièmes antennes à fente (3) ne présentent aucune connexion de signal (7),
    dans lequel les deuxièmes antennes à fente (3) sont décalées de la première antenne à fente (2) de manière électromagnétique en résonance par rapport à la première antenne à fente (2).
  13. Dispositif d'antennes (1) selon la revendication 12, caractérisé en ce que la première antenne à fente (2) peut être insérée ou sortie de la cavité.
  14. Porte-clés (200) caractérisé en ce que le porte-clés (200) présente un dispositif radio (100) selon l'une des revendications 9 à 11 et le dispositif d'antenne (1) forme le boitier du porte-clés (200) .
EP14190924.2A 2014-10-29 2014-10-29 Dispositif d'antenne Not-in-force EP3016201B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14190924.2A EP3016201B1 (fr) 2014-10-29 2014-10-29 Dispositif d'antenne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14190924.2A EP3016201B1 (fr) 2014-10-29 2014-10-29 Dispositif d'antenne

Publications (2)

Publication Number Publication Date
EP3016201A1 EP3016201A1 (fr) 2016-05-04
EP3016201B1 true EP3016201B1 (fr) 2021-09-08

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DE102018122423A1 (de) * 2018-09-13 2020-03-19 Endress+Hauser SE+Co. KG Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen Gehäuse
DE102019108359A1 (de) 2019-03-30 2020-10-01 Endress+Hauser SE+Co. KG Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen für den Einsatz in einem explosionsgefährdeten Bereich ausgebildeten Gehäuse

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US5917454A (en) * 1997-08-22 1999-06-29 Trimble Navigation Limited Slotted ring shaped antenna
JP3844717B2 (ja) * 2002-07-19 2006-11-15 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 アンテナ装置および携帯無線通信端末
US8779998B1 (en) * 2010-09-21 2014-07-15 The United States Of America, As Represented By The Secretary Of The Navy Wideband horizontally polarized omnidirectional antenna

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