EP3579336A1 - Antenne ainsi qu'appareil doté d'une telle antenne - Google Patents

Antenne ainsi qu'appareil doté d'une telle antenne Download PDF

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Publication number
EP3579336A1
EP3579336A1 EP19178913.0A EP19178913A EP3579336A1 EP 3579336 A1 EP3579336 A1 EP 3579336A1 EP 19178913 A EP19178913 A EP 19178913A EP 3579336 A1 EP3579336 A1 EP 3579336A1
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EP
European Patent Office
Prior art keywords
antenna
coil
sections
coil core
winding layer
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.)
Granted
Application number
EP19178913.0A
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German (de)
English (en)
Other versions
EP3579336B1 (fr
Inventor
Peter Nikles
Sebastian Südekum
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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Publication of EP3579336A1 publication Critical patent/EP3579336A1/fr
Application granted granted Critical
Publication of EP3579336B1 publication Critical patent/EP3579336B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • 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
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H01Q3/2629—Combination of a main antenna unit with an auxiliary antenna unit
    • H01Q3/2635—Combination of a main antenna unit with an auxiliary antenna unit the auxiliary unit being composed of a plurality of antennas
    • 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
    • H01Q7/06—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 with core of ferromagnetic material
    • 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
    • H01Q7/06—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 with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • 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
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H01Q3/2629—Combination of a main antenna unit with an auxiliary antenna unit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/021—Behind the ear [BTE] hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/49—Reducing the effects of electromagnetic noise on the functioning of hearing aids, by, e.g. shielding, signal processing adaptation, selective (de)activation of electronic parts in hearing aid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids

Definitions

  • the invention relates to an antenna for inductive information and / or energy transmission with a film-like antenna base body having a central coil core portion which carries a coil.
  • the invention further relates to a device, in particular a hearing aid, with such an antenna.
  • the hearing aid is preferably a hearing aid.
  • a hearing aid as an auxiliary instrument.
  • the sound or a sound signal of the environment is detected via an electromechanical sound transducer, which converts the sound or the sound signal into an electrical signal (audio signal).
  • the electrical signal is processed by means of an amplifier circuit and converted by means of another electromechanical transducer into an amplified sound signal, which is introduced into the ear canal of the person.
  • hearing aid there are different versions of hearing aid known.
  • Another embodiment of a hearing aid is an "in-the-ear device” in which the hearing aid itself is inserted into the ear canal.
  • the auditory canal is at least partially closed, so that with the exception of the sound signal generated by the hearing aid no further sound or only strongly muffled sound can penetrate into the ear canal.
  • a hearing aid system is used with two such hearing aids, each ear is associated with one of the two hearing aids.
  • An information transmission between the two hearing aids is carried out wirelessly by means of an antenna.
  • attenuation of the transmitted information due to the person's head increases with increasing frequency. Due to this, in particular an inductive information transmission, for example, with a frequency between 1 kHz and 300 MHz is used.
  • an antenna in particular a hearing aid, disclosed for radio communication.
  • This comprises a coil core extending along a longitudinal direction, which carries a number of turns, and a first screen made of a ferrimagnetic and / or ferromagnetic material, which is angled toward the longitudinal direction of the coil core, on a front face of the coil core.
  • a second planar screen which is angled away from the longitudinal direction of the coil core, is arranged on the end face facing away from the first screen.
  • such an inductive information transmission antenna generates a magnetic field with a magnetic dipole moment. This is fixed with respect to the antenna in a (transmit) spatial direction.
  • the receiver For the strongest possible inductive coupling and thus for the best possible transmission quality between the antenna and a receiver, in particular an antenna or a coil of a second hearing aid or accessory, the receiver must have a corresponding orientation (orientation) with respect to the direction of the transmitter.
  • a (receiving) surface of the receiver for generating an induction is oriented perpendicular to the direction of the transmitting device.
  • the hearing aid can be rotated relative to the accessory, for example due to rotation of the head.
  • the receiver which is typically arranged rigidly in or on the accessory, also moved or rotated. Consequently, the magnetic field generated by the antenna and in particular its magnetic dipole moment is rotated relative to the receiver, so that an inductive coupling and accordingly the information transmission compared to the optimum position of the receiver with respect to the spatial direction of the magnetic dipole is comparatively reduced or even substantially zero ,
  • this problem also occurs in other devices, such as a sensor (sensor), a body-worn computer system (wearable computer, wearables), a component of a body-worn sensor or actuator system (body area network) or in hearing aids, such as a headset or a headset.
  • a second antenna may be used, wherein the transmission space direction of the second antenna is oriented at an angle to the transmission space direction of the first antenna.
  • the second antenna in the device is preferably arranged at a distance from the first antenna and oriented in such a way that mutual interference is prevented.
  • a second antenna requires additional space, which is why a relatively complex or even for the intended use of the device not applicable structure is necessary.
  • the invention has for its object to provide an antenna which allows a comparatively reliable inductive coupling with a receiver even with different spatial orientations. Furthermore, a device with such an antenna is to be specified, as well as a method for operating such an antenna.
  • this object is achieved by the features of claim 1.
  • this object is achieved by the features of claim 7 and in terms of the device, this object is achieved by the features of claim 8.
  • the antenna is suitable, in particular provided and / or adapted to be used in an inductive information and / or energy transmission.
  • the antenna is for example a component of a hearing device, in particular a hearing aid.
  • the antenna has a foil-like, preferably contiguous, antenna base body with a central coil core section and outer antenna sections arranged opposite one another on both sides of the middle coil core section.
  • the middle coil core section carries a first coil (main coil).
  • the outer antenna sections are flat.
  • each of the outer antenna sections has an edge-side coil core section adjoining the middle coil core section and carrying a second coil (secondary coil).
  • the first and the second coils have different numbers of turns.
  • the outer antenna sections are angled relative to the middle coil core section.
  • the first coil and the two second coils are oriented in different spatial directions, in other words, the coil axes of the first and the second two coils are angled to each other.
  • an angle between the central coil core section and the respective outer antenna section is between 80 ° and 130 °, or in particular between 85 ° and 110 °.
  • the edge-side coil core sections are oriented perpendicular to the middle coil core section to form a U-shape.
  • the outer antenna sections each form a U-leg of the U-shape and the middle coil core section the U-connection leg of the U-shape.
  • the U-connection leg extend in a longitudinal direction and the U-legs in a transverse direction.
  • the foil-like two outer antenna sections extend in two mutually parallel and spaced planes.
  • An information transmission here means, in particular, a transmission of a signal or a transmission of data, such as, for example, setting data or data which comprise information about sound detected by means of the hearing aid or a signal signal processed sound signal.
  • the energy received in the energy transmission is preferably provided for charging an energy store, in particular a battery.
  • a foil-like object is to be understood in this case as having an expansion in a spatial direction which is comparatively small in comparison to its expansion in a plane oriented perpendicular to this spatial direction.
  • the antenna main body is flat.
  • the two-dimensional pages are each referred to as broadside.
  • Those broad sides of the middle coil core section and of the two outer antenna sections which face the two outer antenna sections or the middle coil core section are also referred to below as the inner side of the respective section, the other broad sides as outer sides.
  • the area encompassed at least partially by means of the antenna base body forms an inner area.
  • the antenna base body is a film or formed by means of a film.
  • a thickness of the film that is to say its extent perpendicular to the broad side, is between 25 ⁇ m and 700 ⁇ m, in particular between 70 ⁇ m and 300 ⁇ m, preferably between 100 ⁇ m and 250 ⁇ m.
  • the antenna body is preferably bendable or foldable. Consequently, the antenna base can be angled from a planar shape by bending the two outer antenna sections.
  • the first coil and each of the second coils are advantageously independently switchable (activatable), i. supplied with electric current with a corresponding current direction.
  • the first and second coils are expediently connected to a current or voltage source.
  • the first coil, one of the second coils individually or a combination of these coils can thus be connected in each case with a predetermined current direction.
  • the first and the two second coils may be switched simultaneously, with the current direction selected such that the magnetic fields generated by the coils are constructively superimposed, i.
  • the north pole of the magnetic field generated by the first coil is adjacent to the south pole of the magnetic field generated by a second coil and the south pole of the magnetic field generated by the first coil is adjacent to the north pole of the magnetic field generated by another second coil. So the coils are traversed by the current in the same sense.
  • the antenna acts in the manner of a ferrite rod antenna with a comparatively large end face, wherein the generated magnetic dipole moment is oriented substantially perpendicular to the outer antenna sections.
  • the two second coils are switched in a second mode.
  • the generated magnetic dipole moment is then not tilted perpendicular to the outer antenna sections, but at an angle to the normal of the outer antenna sections.
  • the direction of the transmitter space or the orientation of the magnetic dipole moment generated by means of the antenna is not fixed with respect to the antenna (rigidly), but spatially differently oriented depending on the switching of the coils.
  • a radiation characteristic of the antenna is adjustable and adjusted depending on the switching of the coils.
  • the magnetic field generated by the antenna is rotated.
  • the receiver is, for example, a coil
  • the first coil and second coil are energized in such a way that the magnetic dipole moment generated by the antenna runs as parallel as possible to a coil axis or as perpendicular as possible to a receiving surface of the receiver.
  • the antenna is inductively (magnetically) inductively coupled to a receiver due to the magnetic dipole moment generated thereby, the receiver being in particular a second antenna or a coil.
  • the receiver is in particular an accessory such as a remote control or, in particular, worn on the body, relay station.
  • the strength of the magnetic inductive coupling changes.
  • the orientation of the transmission space direction by means of a change of the circuit (drive), in other words by means of a change in the current intensity and / or the current direction Change coils.
  • the transmission space direction is preferably adapted according to the changed spatial orientation of the receiver. For example, in a coil-shaped receiver, the magnetic dipole moment is aligned parallel to the coil axis of the receiver.
  • the magnetic dipole moment can not be set completely in accordance with the receiver, for example with a relatively strong rotation of the receiver with respect to the antenna, in particular 90 ° with respect to the antenna, it is possible due to the change in the spatial orientation of the magnetic dipole moment that a comparatively large proportion of the magnetic dipole moment contributes to the magnetic coupling.
  • the magnetic inductive coupling can be and is adjusted such that a sufficient information transfer is realized.
  • the apparatus having the receiver, in particular the accessory, or alternatively a device having the antenna, in particular the hearing aid has an evaluation unit (signal processing unit) which can be evaluated by means of a suitable algorithm, such as a channel estimation algorithm or the so-called BER evaluation (Bit -Error rate evaluation) determines the strength of the inductive coupling, so that, depending on the result of the determination, the switching or control of the coils is optionally changed for a sufficient transmission quality between the antenna and the receiver.
  • a suitable algorithm such as a channel estimation algorithm or the so-called BER evaluation (Bit -Error rate evaluation) determines the strength of the inductive coupling, so that, depending on the result of the determination, the switching or control of the coils is optionally changed for a sufficient transmission quality between the antenna and the receiver.
  • each of the two outer antenna sections on a particular circular segment-like flange portion adjoins the free end side, that is to say at the end side opposite the middle coil core section and / or facing away from the peripheral coil core section.
  • the outer antenna section is extended starting from the free end side of its edge-side coil core section, in particular a circular segment, with the peripheral coil core section and the flange section extending in a common plane.
  • the outer antenna section is at a circle segment Extension mushroom-shaped.
  • extension is rectangular, T-shaped, circular or ring-shaped.
  • the antenna has a, preferably one-piece, foil-like shielding. This is respectively arranged on the side of the two outer antenna sections facing the middle coil core section and on the side of the middle coil core section facing the outer antenna sections.
  • the shield is arranged on the respective inner side of the outer antenna sections and the middle coil core section.
  • the shield is greater than or equal to the antenna base body and covers it.
  • the shield has an extent in each case parallel to the outer antenna sections or to the middle coil core section, which is greater than or equal to the extent of the outer antenna section or of the middle coil core section.
  • the shield has an electrical conductivity greater than 10 6 S / m.
  • the shield has a (magnetic) permeability ⁇ r ⁇ 1000, in particular ⁇ r ⁇ 100, preferably ⁇ r ⁇ 2.
  • the shield is thus formed from a diamagnetic (0 ⁇ r ⁇ 1) or paramagnetic ( ⁇ r > 1) material, in particular copper, or contains diamagnetic or paramagnetic material.
  • the thickness of the shield is chosen such that a penetration of the shield is avoided by the magnetic field generated by the antenna.
  • the shield has a thickness between 0.25 and 1.5 times the penetration depth of the magnetic field for the shield material.
  • the permeability of the antenna base is greater than the permeability of the shield, and the electrical conductivity of the material of the shield is suitably greater than the electrical conductivity of the shield Antenna base body.
  • the magnetic field does not penetrate into the shielding, but is forced out of it, in particular due to a current induced in the surface of the shield according to Lentz's rule and a corresponding countermagnetic field.
  • the magnetic field is forced into the antenna base body and thus essentially runs there. Due to the shield so spreading the magnetic field lines is avoided in the interior. Due to this, an effective permeability of the antenna main body as well as the sensitivity of the antenna are advantageously increased.
  • the sensitivity and the quality of the antenna can be adapted to the requirements arising from the design, in particular its extent, of the antenna base body in relation to the shielding.
  • reduced outer antenna sections improve the quality of the antenna with advantageously only slightly reduced sensitivity.
  • the magnetic field lines are deflected away from the inner region or penetration of the magnetic field lines into the inner region is avoided.
  • outer antenna sections smaller than the shield it is understood that a projection of the outer antenna sections onto the shield is completely covered by the latter.
  • the spatial orientations of the magnetic dipole moment produced by means of the antenna can be realized by means of a corresponding circuit or control of the coils, depending on the configuration of the antenna, in particular the angle between the central coil core section and the respective outer antenna section, the shape of the flange sections and the shape of the shielding , If typical or comparatively frequently occurring rotations are provided or expected during operation between the antenna and the receiver, the antenna is preferably arranged in a device supporting it, for example a hearing aid, such that rotations are detected by means of a corresponding change in the magnetic dipole moment Considering the design of the antenna and thus the realizable spatial orientations - can be compensated as possible and will be, so the inductive coupling is as strong as possible or remains.
  • rotations of a person's head typically occur more frequently and / or at a greater angle than an inclination of the head.
  • the antenna is then preferably arranged in a hearing aid so that the best possible (strong) inductive coupling between the antenna of the hearing aid and the receiver of an accessory in such rotations by a corresponding adjustment of the spatial orientation of the magnetic dipole moment for these rotations is possible.
  • the first coil and / or the second coil are wound by means of a winding machine around the unfolded antenna base body formed from a foldable film and the coils, for example by means of bonding, connected to corresponding electrical connections.
  • the shield formed as a copper foil is then arranged on the antenna base body and the antenna base body and copper foil are folded.
  • the antenna base body is formed by means of a rigid and already angled ferrite core.
  • the first coil is applied by means of the winding machine.
  • the second coils are pre-wound and then attached to the marginal coil core sections. If the outer antenna sections have flange sections, they are designed such that the second coils can be plugged onto the peripheral coil core sections via them.
  • the antenna base body is integrated into the circuit board.
  • the shield is glued in the course of the production of the antenna on that side of the circuit board, which is intended to be facing the interior.
  • the shield and the antenna base body are integrated in a preferably flexible printed circuit board.
  • a first winding layer and a second winding layer are arranged on opposite broad sides of the antenna base body.
  • the antenna main body, the first winding layer, and the second winding layer are stacked one above the other.
  • the antenna base body and the winding layers form particular layers of the circuit board.
  • the layers are glued or laminated onto a substrate or to one of the layers.
  • each have a number of interconnects, by means of which the turns of the first coil and the windings of the second coil are formed.
  • the conductor tracks run essentially perpendicular to the longitudinal direction or to the transverse direction.
  • the conductor tracks of the two winding layers are electrically connected to one another by means of plated-through holes (vias), which extend in a suitable manner perpendicular to the broad side of the antenna base body, to form the corresponding coil.
  • the printed conductors are introduced into the corresponding winding layer by means of etching or by means of a lithography process.
  • the shielding is expediently formed by means of a copper layer of the printed circuit board and arranged on the side of the antenna base body facing the inner region and on the broadside of the first winding layer facing away from the antenna base body.
  • the antenna base body and / or the winding layers are applied, for example, by means of lamination or alternatively by means of coating.
  • the antenna base body and / or the winding layers are applied to one of the layers or on a carrier structure.
  • the winding layers are formed only in the region of the middle coil core section and the peripheral coil core sections.
  • the winding layers completely cover the antenna base, i. over the entire area of the antenna base body.
  • the printed circuit board has, for example, a (thickness) extension perpendicular to its broad side between 75 ⁇ m and 850 ⁇ m, in particular between 120 ⁇ m and 450 ⁇ m, preferably between 150 ⁇ m and 400 ⁇ m.
  • the antenna base body integrated into the printed circuit board has, for example, as set out above a thickness of between 25 ⁇ m and 700 ⁇ m, in particular between 70 ⁇ m and 300 ⁇ m, preferably between 100 and 250 ⁇ m.
  • an essentially field-free region is formed, in particular centrally, on the insides of the shield arranged on the outer antenna sections.
  • an electrical or electronic device component of a device having the antenna can be connected here.
  • the electronic device component is a charging electronics in the form of a charging chip, a radio system chip and / or connections for an energy store.
  • the electronic device component is preferably arranged centrally on the inner side facing printed circuit board side (surface) of a portion of the circuit board, in which the outer antenna sections are integrated.
  • the electronic device component is positioned substantially field-free and is not disturbed or only to a small extent due to the magnetic fields.
  • an electronic device component does not interfere with a signal-to-noise ratio of the antenna during operation, or only to a comparatively small degree, i. the antenna and the electronic device component have a comparatively low crosstalk.
  • the electronic device component is also easy and inexpensive to apply to the circuit board, for example by reflow soldering.
  • the antenna has a third winding layer and a fourth winding layer, which are arranged on the antenna base facing away from the broad side of the first winding layer or on the antenna base body facing away from broad side of the second winding layer.
  • the third winding layer is expediently arranged between the first winding layer and the shield.
  • the third winding layer and the fourth winding layer comprise conductor tracks.
  • the third coil is another first coil or a second coil.
  • three third coils are formed in an analogous manner, which are arranged concentrically with respect to the first coil and the two second coils.
  • the coils are preferably independently switchable or controllable. In this way, with a corresponding circuit (energization, control) of the coils, the transmission space direction of the antenna can be set and adjusted more precisely.
  • the third coil is galvanically connected to the corresponding first coil or to the corresponding second coil to form a single winding.
  • one or more further first coils are carried by the central coil core section, wherein the further first coils are arranged side by side in the longitudinal direction or in the coil longitudinal direction.
  • one or more further second coils are carried by one or both edge-side coil core sections, wherein the further second coils are arranged next to one another in the transverse direction or in the coil longitudinal direction.
  • the coils are in this case also independently switchable, so that with a corresponding circuit of the coil, the direction of the transmitter space of the antenna can be set more precisely and is also.
  • a (electrical) contacting of the coils in the course of production is comparatively simple.
  • no additional working step for contacting is necessary, but is already taken into account in the design (layout) of the printed circuit board. Due to this, the contacting of the coils also requires no solder pad, so that advantageously a space requirement is reduced.
  • the circuit board has further winding layers for forming a further coil concentrically arranged with respect to the first coil and to the third coil or to the second coil and to the third coil.
  • the integrated antenna base body in the course of assembly or production is angled (folded). Furthermore, in the integration of the shield and the antenna base body In a particularly flexible circuit board, the antenna advantageously comparatively stable and can therefore be mounted with relatively little effort in a device.
  • the shield is integrated into the printed circuit board.
  • the printed circuit board is then expediently arranged on the side of the antenna base body facing the inner region and of the coils.
  • a device has an antenna in one of the variants set out above.
  • the antenna is used for wireless inductive information and / or energy transmission, wherein the antenna has a first coil, which is wound around a middle coil core section of a sheet-like antenna base body, and second coils which are at an angle, in particular at 90 ° to the first coil, are each wound around a peripheral coil core portion of the film-like antenna base body.
  • the device is, for example, a sensor (sensor) such as a blood pressure monitor, a blood sugar or a heart rate monitor or a computer system (wearable computer, wearables) carried on the body or a component of a sensor or actuator system worn on the body (body area sensor). network).
  • the device is a hearing aid, such as a headset or a headset, preferably, the device is a hearing aid.
  • the hearing aid may be, for example, a receiver-in-the-canal hearing aid (RIC), an in-the-ear (in-the-ear) hearing aid, and an in-the-canal hearing aid (ITC).
  • a complete-incanal hearing aid or a behind-the-ear (BTE) hearing aid that is worn behind an auricle.
  • the hearing aid may be part of a (binaural) hearing aid device system, wherein each ear of a person is associated with such a hearing aid each.
  • the device in particular the hearing aid can be an accessory, such as a remote control or a person-portable relay station, assigned to the inductive information and / or energy transmission with the device is at least temporarily inductively coupled.
  • the accessory for example, also has an antenna in the variants set out above.
  • the outer antenna sections extend over further areas of the device, for example also over the entire device. Due to the film-like design of the antenna space-saving and cost is increased thereby, whereby a bandwidth and the quality and sensitivity of the antenna can be adapted to the operational requirements.
  • the antenna surrounds a device component at least in sections.
  • the device component is disposed in the interior of the antenna.
  • the outer antenna sections in particular their flange sections are adapted, for example, to a shape of the device component.
  • the flange portion is not flat, but bent.
  • the flange portion has a recess, for example for contacting the device component.
  • the device component is in particular an energy store such as a battery, in particular a lithium-ion accumulator, which serves to supply energy to the hearing aid.
  • the antenna is used for inductive energy transmission, so that in a certain operating mode of the device by means of the antenna, a wireless (wireless) charging of the energy storage device of the device is possible.
  • the device component substantially parallel and mutually spaced end faces (end faces) and a peripheral region, which by means of a circumferential, to the end faces of the device component vertical lateral surface is formed.
  • the outer antenna sections are respectively arranged on the end faces of the device component, and the middle coil core section covers the outer surface of the device component.
  • the outer antenna sections cover the end face of the respective end face at least partially, preferably at least half the end face.
  • the shield completely covers the end faces of the device component.
  • the outer antenna sections are shaped according to the surface, for example also curved. Consequently, the antenna is particularly space-saving arranged on the device component.
  • the shielding Due to the shielding, propagation of the magnetic field lines from the side of the outer antenna elements facing the device component to the device component is avoided. In this case, eddy current losses are caused by an operational magnetic alternating field at most and only slightly in the shield. As a result, eddy current losses and caused by this heating in device component are particularly advantageously avoided, thereby preventing damage to the hearing aid component and their life are increased.
  • the device component is made of a material having a comparatively high electrical conductivity, for example of copper, or is surrounded by this material, the magnetic field generated by the antenna is due to a Lentz'schen induced induced current in the surface of the device component and a concomitant magnetic field forced out of this surface, so that no shielding between the antenna base body and the device component is necessary.
  • the device component is at least partially surrounded by a sleeve-like jacket.
  • the shroud has an extension in the longitudinal direction, which is at most equal to the Extension of the peripheral area of the device component is.
  • the jacket shield is arranged in particular centrally between the outer antenna sections and not necessarily (electrically) closed.
  • the jacket is preferably a part of the shield, but not necessarily connected to this (galvanic). Due to the jacket shield penetration of the magnetic field lines is avoided in the device component, so that eddy current losses are caused at most and only slightly in the shroud.
  • Two devices 2 are shown, which are designed as identical hearing aids 2a of a (binaural) hearing aid system 4.
  • the two hearing aids 2a are provided and arranged to be worn behind one ear of a user (wearer, person). In other words, it is in each case behind-the-ear hearing aids (BTE hearing aid), which has a sound tube, not shown, which is inserted into the ear of the user.
  • BTE hearing aid behind-the-ear hearing aids
  • the respective hearing aid device 2a comprises a housing 6 made, for example, of a plastic. Within the housing 6, a microphone 8 with two electromechanical sound transducers 10 is arranged.
  • the two electromechanical sound transducers 10 are signal-coupled to a signal processing unit 12, which comprises an amplifier circuit.
  • the signal processing unit 12 has electrical and / or electronic (active and / or passive) components and circuit elements.
  • a loudspeaker 14 is signal-coupled to the signal processing unit 12, by means of which the electrical signals of the sound transducer 10 processed by the signal processing unit 12 are output again as sound signals. These sound signals are conducted by means of the sound tube not shown in the ear of a user of the hearing aid system 2.
  • each hearing aid 2a further comprises an antenna 18, by means of which an inductive information transfer 20th between the two hearing aids 2a is possible.
  • the antenna 18 thereby partially surrounds the energy store 16.
  • the inductive information transmission 20 between the two hearing aids 2a serves the exchange of data. Due to the exchange of data, for example, it enables improved directional beamforming (beamforming).
  • accessory 22 is shown, which is for example a remote control or a relay station, which is for example worn by the user.
  • This accessory 22 has a receiver 23, with which a further, indicated by the dot-dashed arrows inductive information transmission 20 with the two antennas 18 of the two hearing aids 2a is realized.
  • the inductive information transmission 20 is used to exchange data between the other device 22 and the hearing aids 2a.
  • the antenna 18 is used for inductive and wireless energy transmission, from a charger not shown to the hearing aid 2a, so that in a certain operating mode by means of the antenna 18 charging the rechargeable energy storage 16 of the hearing aid 2a is possible. In other words, energy is transmitted inductively by means of the antenna 18, which energy is used to charge the energy store 16.
  • the devices 2 are a sensor (sensor) such as a blood pressure, a blood sugar or a heart rate monitor or a worn on the computer system (Wearable computer, wearables) or a component of a worn on the body sensor or actuator system ( Body Area Network).
  • sensors 2 have an antenna 18 for inductive information and possibly for inductive energy transfer.
  • the FIGS. 2a to 2c show the antenna 18 of the device 2.
  • the antenna 18 has a film-like, formed from a soft magnetic ferrite antenna base body 24.
  • the antenna base body 24 comprises a central coil core section 26 which carries a first coil 28.
  • the middle coil core section 26, and thus a coil axis of the first coil 28 extends along a longitudinal direction L.
  • an outer antenna section 30 is arranged to form a U-shape of the antenna base body 24.
  • the two outer antenna sections 30 are oriented perpendicular to the longitudinal direction L.
  • the two outer antenna sections 30 extend in a direction perpendicular to the longitudinal direction L perpendicular transverse direction Q.
  • the two outer antenna sections 30 of the antenna base body 24 each have an edge-side coil core region 32, which adjoins the middle coil core section 26.
  • the peripheral coil core sections 32 each carry a second coil 34 whose coil axis is oriented in the transverse direction Q.
  • the two outer antenna sections 30 each have a flat flange section 36, which is located on the free end side, ie on the middle coil core section 26 opposite and facing away Front side of the peripheral coil core portion 32 adjacent.
  • the outer antenna section 30 is extended semicircularly starting from the free end side of the corresponding edge-side coil core section 32, the peripheral coil core section 32 and the flange section 36 extending in a common plane oriented perpendicular to the longitudinal direction L.
  • the two outer antenna sections 30 are of identical construction and mirror-symmetrical with each other, their plane of symmetry being perpendicular to the longitudinal direction L.
  • the two outer antenna sections 30 are not identical or symmetrical.
  • the flange sections 36 are adapted to a shape of the device component 16, or the flange sections have, for example, a recess for contacting the device component 16.
  • the first coil 28 and the two second coils 34 are each electrically contacted with an electronics, not shown, or alternatively with a power source, not shown. At most, the first coil 28 and the two second coils 34 are independently switchable, so acted upon with a predetermined current (controllable).
  • a device component 38 of the device 2 is arranged, which here is the energy accumulator 16 of the device 2 designed as a battery.
  • the energy store 16 has a shape that corresponds to two coaxially mounted cylinders arranged on top of one another whose cylinder axes extend in the longitudinal direction L.
  • the opposite and spaced flat surfaces of the cylinder form parallel end faces 40 of the energy store 16.
  • the lateral surfaces of the two cylinders form a peripheral region 42 of the energy store 16.
  • the end faces 40 extend in a plane perpendicular to the longitudinal direction L, so that they are parallel to the outer antenna sections 30 are oriented.
  • the outer antenna sections 30 are arranged on opposite end faces 40 of the energy store and the middle coil core section 26 overlaps the peripheral region 42 of the energy storage 16 designed as a device component 38th
  • a film-like shield 44 is arranged between the Antennengrundköper 24, so the middle coil core portion 26 and the outer antenna portion 30, and the device component 38.
  • the shield 44 is thus arranged on the middle coil core section 26 facing side of the two outer antenna sections 30 and on the outer antenna sections 30 facing side of the middle coil core section 26.
  • the region of the shielding 44 arranged on the middle coil core section 26 or the region which is arranged between the middle coil core section 26 and the energy storage 16 will be referred to below as the middle shielding section 46.
  • the two regions of the shield 44 which are arranged on the outer antenna sections 30 are referred to as outer shield sections 48.
  • the foil-like shield 44 has a conductivity of more than 10 6 S / m and is formed of or comprises diamagnetic material. According to the embodiment of the Fig. 2 the shield 44 is formed by means of a copper foil.
  • the shield 44 is larger than the antenna base body 24 and covers it.
  • the middle shield portion 46 has an extension in a plane parallel to the center coil core portion 26 which is larger than the extension of the coil core portion 26.
  • the outer shield portions 48 have an extension in a plane parallel to the outer antenna portions 30, which is larger than the extent of the outer antenna sections 30. The two outer shield sections 48 completely cover the end faces 40 (end faces) of the energy accumulator 16.
  • the device 2 Due to the arrangement of the antenna 18 directly on the energy storage 16 or on the device component 38 and by arranging the shield 44 between the antenna base body of the antenna element 18 and the energy storage 16, a space-saving arrangement of the antenna 18 in the device 2 is realized. As a result, the device 2 is particularly space-saving (small) running.
  • FIGS. 3a to 3c each show an alternative embodiment of the flange portions 36.
  • the first alternative shown formed as a circular segment flange portion 36 relative to the shield 44 is reduced.
  • the extent of the circle segment along its radial direction is smaller than the extent of the shield 44 in this direction. In this way, an expansion of magnetic field lines in the inner region I is further reduced.
  • the second alternative according to the Fig. 3b and the third alternative the Fig. 3c have different center angle of the shaped as a circular segment flange portion 36.
  • the flange portion 36 of Fig. 3b has a center angle of 120 °
  • the flange portion 36 of the Fig. 3c has a center angle of 60 °.
  • Fig. 4 schematically shows a flexible circuit board 50, in which the shield 44 and the antenna base 24 are integrated.
  • the antenna base body 24 formed from a ferrite is laminated into the printed circuit board 50.
  • a first winding layer 52 and a second winding layer 54 are arranged on opposite broad sides of the antenna base body 24, a first winding layer 52 and a second winding layer 54 are arranged.
  • the first winding layer 52 and the second winding layer 54 each have conductor tracks 56 (FIG. Fig. 5a ), by means of which the turns of the first coil 28 and the windings of the two second coils 34 are formed.
  • the conductor tracks 56 are introduced by means of etching into the first winding layer 52 and into the second winding layer 54 during the production of the printed circuit board 50.
  • the tracks 56 are electrically interconnected by vias 58.
  • the first winding layer 52 is disposed on a substrate 60.
  • the shield 44 is arranged, which is formed here by means of a copper layer of the printed circuit board 50.
  • the shield 44 is arranged on the broad side of the substrate 60 facing the inner region I.
  • a lacquer layer 62 is arranged in each case.
  • FIGS. 5a and 5b show the antenna 18 in the plan state.
  • the antenna 18 is folded (angled), so that the antenna 18 includes the energy storage 16 space-saving.
  • This is possible due to the use of the flexible printed circuit board 50 and due to the film-like and foldable design of the antenna base body 24.
  • the antenna base body 24 and the shield 44 according to the embodiment of Fig. 4 integrated into the circuit board 50.
  • the Fig. 5a shows the flexible printed circuit board 50 with integrated shield 44 and integrated antenna base body 24, in the Fig. 5a
  • this circuit board 50 is shown without the substrate 60 and without the two resist layers 62.
  • the Fig. 6 shows in an exploded view, the antenna 18.
  • the antenna 18 in this case has a third coil 64, which is arranged concentrically to the first coil 28 about the middle coil core section 26.
  • this third coil 64 is formed from conductor tracks 56 which are electrically connected by plated-through holes 68 and which are introduced, in particular, by means of etching into a third winding layer 66 and into a fourth winding layer 68.
  • the third winding layer 66 or the conductor tracks 56 of the third winding layer 66 on the inner region I facing side of the first winding layer 52 and the fourth winding layer 68 is disposed on the outer region A side facing the second winding layer 54.
  • adjacent plated-through holes 58 are arranged offset to one another in a direction perpendicular to the longitudinal direction L and perpendicular to the transverse direction Q.
  • adjacent vias 58 are not arranged in a common plane, which is spanned by means of the longitudinal direction L and the transverse direction Q.
  • the plated-through holes 58 have a greater space requirement in the longitudinal direction L than the printed conductors 56.
  • Manufacturing or production-related is a minimum distance between two conductor elements, in other words between two adjacent interconnects 56, between two adjacent vias 58 and between a conductor 56 and that via 58 which is connected to a trace 56 of the adjacent trace 56 is necessary.
  • the conductor elements arranged closest to one another are two adjacent plated-through holes 58.
  • a distance between two adjacent printed conductors 56 is greater than that minimum distance.
  • the smallest distance between two conductor elements is between a conductor 56 and the through-connection 58 connected to the directly adjacent conductor 56.
  • FIGS. 7a and 7b Representatively illustrate a method of operating the antenna 18, which according to the Fig. 2 is trained.
  • Fig. 7a a first mode of operation of the antenna 18 is shown, wherein the first coil 28 and the two second coils 34 are connected simultaneously, and wherein the current direction is selected such that the magnetic fields generated by means of the coils 28 and 34 overlap constructively. So the coils 28 and 34 are traversed by the current in the same sense.
  • the antenna 18 acts in the manner of a ferrite rod antenna with a comparatively large end face, wherein a generated during operation magnetic dipole moment m is oriented substantially perpendicular to the outer antenna sections 30 and parallel to the longitudinal direction L.
  • Fig. 7b shows the antenna 18 in a second mode, wherein only one of the two second coil 34 is connected.
  • the magnetic dipole moment m generated in operation is not tilted perpendicular to the outer antenna sections 30, but in a plane which is spanned by the longitudinal direction L and the transverse direction Q, at an angle ⁇ against the normal N of the outer antenna sections 30.
  • FIGS. 7a and 7b is shown in addition to the antenna 18 is designed as a coil receiver 23 of the accessory 22, the coil axis S is oriented perpendicular to the outer antenna sections 30 of the antenna 18 and is rotated at an angle ⁇ to the normal N.
  • An inductive coupling between the antenna 18 and the receiver 23 is maximum when the magnetic dipole moment m is oriented parallel to the coil axis S.
  • a sender space direction in other words the spatial orientation of the generated during operation of the antenna 18 magnetic dipole moment m, with respect to the antenna 18 is not fixed (rigid), but depending on the switching of the coils 28,34 spatially differently oriented.
  • the magnetic dipole moment m generated during operation of the antenna 18 is adjusted relative to the antenna 18 in accordance with an orientation of a receiver 23. Consequently, a reliable one inductive coupling of the antenna 18 to the receiver 23 even with a rotation of the receiver 23 relative to the antenna 18 allows and thus realizes a reliable inductive information transfer.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Otolaryngology (AREA)
  • Neurosurgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Aerials (AREA)
  • Near-Field Transmission Systems (AREA)
EP19178913.0A 2018-06-08 2019-06-07 Antenne ainsi qu'appareil doté d'une telle antenne Active EP3579336B1 (fr)

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DE102018209189.7A DE102018209189A1 (de) 2018-06-08 2018-06-08 Antenne sowie Gerät mit einer solchen Antenne

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EP (1) EP3579336B1 (fr)
JP (1) JP6918863B2 (fr)
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DK (1) DK3579336T3 (fr)

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Publication number Publication date
CN110581346A (zh) 2019-12-17
EP3579336B1 (fr) 2022-10-19
DE102018209189A1 (de) 2019-12-12
CN110581346B (zh) 2021-10-22
DK3579336T3 (da) 2023-01-16
JP2019213201A (ja) 2019-12-12
DE202018104183U1 (de) 2019-09-12
US10893368B2 (en) 2021-01-12
US20190394584A1 (en) 2019-12-26
JP6918863B2 (ja) 2021-08-11

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