WO2014148312A1 - Appareil d'antenne et dispositif électronique - Google Patents

Appareil d'antenne et dispositif électronique Download PDF

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Publication number
WO2014148312A1
WO2014148312A1 PCT/JP2014/056313 JP2014056313W WO2014148312A1 WO 2014148312 A1 WO2014148312 A1 WO 2014148312A1 JP 2014056313 W JP2014056313 W JP 2014056313W WO 2014148312 A1 WO2014148312 A1 WO 2014148312A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
antenna
resin layer
magnetic resin
antenna device
Prior art date
Application number
PCT/JP2014/056313
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English (en)
Japanese (ja)
Inventor
久村　達雄
佑介 久保
弘幸 良尊
Original Assignee
デクセリアルズ株式会社
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Filing date
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Publication of WO2014148312A1 publication Critical patent/WO2014148312A1/fr

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    • 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
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/143—Inductive couplings for signals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles

Definitions

  • the present invention relates to an antenna device having a plurality of antennas, and more particularly to an antenna device in which another antenna is arranged on the inner diameter of a loop antenna, and an electronic apparatus using the antenna device.
  • Recent wireless communication devices are equipped with a plurality of RF antennas such as a telephone communication antenna, a GPS antenna, a wireless LAN / BLUETOOTH (registered trademark) antenna, and an RFID (Radio Frequency Identification).
  • antenna coils for power transmission have also been mounted.
  • Examples of the power transmission method used in the non-contact charging method include an electromagnetic induction method, a radio wave reception method, and a magnetic resonance method. All of these transmit power by electromagnetic induction or magnetic resonance between the primary side coil and the secondary side coil.
  • a general antenna has a configuration in which a magnetic flux concentrating magnetic shielding sheet 42 is attached to a spiral coil-shaped loop antenna element 2 with an adhesive layer 41 coated with an adhesive. Yes.
  • each antenna occupies a mounting space in an electronic device in which the antenna is mounted, so that the mounting area increases with an increase in the type and quantity of antennas to be mounted. For this reason, there is an increasing demand for downsizing and thinning of these antennas, as well as integration and integration.
  • Non-Patent Document 1 reports that the ferrite core has a significant decrease in DC superposition characteristics due to magnetic saturation.
  • a metal magnetic foil having a high saturation magnetic flux density is generally as thin as several tens of microns, the problem of magnetic saturation occurs similarly if it is not used by overlapping several tens of sheets.
  • a wireless power consortium (Wireless Power Consortium, WPC) defines a magnet-mounted transmission coil unit (design A1 described in Non-Patent Document 2), which is already on the market.
  • WPC Wireless Power Consortium
  • a magnet-mounted transmission coil unit design A1 described in Non-Patent Document 2
  • the resonance frequency on the power receiving coil side is greatly deviated, resulting in a problem that the transmission efficiency of the transmission power from the primary side to the secondary side is lowered and the heat generation of the power receiving coil is increased.
  • transmission itself cannot be performed if the resonance frequency shift is significant.
  • an object of the present invention is to provide an antenna device having improved antenna performance while efficiently arranging a plurality of antennas in a space-saving manner.
  • an antenna device includes a loop antenna and one or more other antennas arranged on the inner diameter of the loop antenna.
  • the loop antenna and other antennas have one or more magnetic resin layers containing magnetic particles. At least one of the loop antenna or one or more other antennas is at least partially embedded in the magnetic resin layer.
  • an electronic apparatus includes an antenna device having a loop antenna and one or more other antennas arranged on the inner diameter of the loop antenna.
  • the loop antenna and other antennas have one or more magnetic resin layers containing magnetic particles. At least one of the loop antenna or one or more other antennas is at least partially embedded in the magnetic resin layer.
  • At least one of the one or more magnetic resin layers is spherical or has a dimension ratio of 6 or less expressed by a ratio of a major axis to a minor axis. Spheroid magnetic particles.
  • one or more other antennas are arranged on the inner diameter of the loop antenna, so that the mounting area of the antenna device becomes the occupied area of the loop antenna, and the mounting space can be reduced.
  • the magnetic shield layer has a magnetic resin layer with little deterioration of magnetic properties due to magnetic saturation, there is little change in coil inductance and stable communication even in environments where a strong magnetic field is applied. Can do.
  • FIG. 1A is a plan view showing a configuration example of an antenna device according to an embodiment of the present invention.
  • 1B is a cross-sectional view taken along the line AA ′ of FIG. 1A.
  • FIG. 2A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • 2B is a cross-sectional view taken along the line AA ′ of FIG. 2A.
  • FIG. 3A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • 3B is a cross-sectional view taken along the line AA ′ of FIG. 3A.
  • FIG. 4A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • FIG. 4B is a cross-sectional view taken along the line AA ′ of FIG. 4A.
  • FIG. 5A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • 5B is a cross-sectional view taken along the line AA ′ of FIG. 5A.
  • FIG. 6A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • 6B is a cross-sectional view taken along the line AA ′ of FIG. 6A.
  • FIG. 7A is a plan view showing a modification of the antenna device according to one embodiment of the present invention.
  • FIG. 7B is a cross-sectional view taken along the line AA ′ of FIG. 7A.
  • FIG. 8 is a block diagram illustrating a configuration example of a contactless communication system using an antenna device.
  • FIG. 9 is a block diagram showing the main part of the resonance circuit.
  • FIG. 10 is a block diagram illustrating a configuration example of a non-contact charging system using an antenna device.
  • FIG. 11 is a diagram illustrating the configuration of a measurement antenna device for measuring the influence of the magnetic resin layer and the magnetic layer on the magnetic characteristics.
  • 11A is a plan view
  • FIG. 11B is a cross-sectional view taken along the line AA ′ of FIG. 11A, and is a cross-sectional view when the magnetic shield layer is only a magnetic resin layer.
  • FIG. 11C is a cross-sectional view taken along the line AA of FIG.
  • FIG. 12 is a side view showing a configuration of a coil module for characteristic evaluation of the present invention.
  • 12A is a side view showing a configuration of a single coil module
  • FIG. 12B is a side view of the coil module shown together with a transmission coil unit including a magnet that generates a DC magnetic field.
  • FIG. 13 is a graph plotting the change value of the inductance when the DC magnetic field is applied to the inductance value of the coil when the DC magnetic field is not applied and the relative value ⁇ L of the inductance, and ⁇ L is changed by changing the thickness of the magnetic shield layer. It is.
  • FIG. 14 is a graph of a comparative example in which the relative value ⁇ L of inductance is plotted by changing the thickness of the magnetic shield layer.
  • FIG. 14A shows a case where a relative magnetic permeability is about 100 using a magnetic shield layer using sendust having a major axis / minor axis of about 50.
  • FIG. 14B shows a relative permeability of 1500 using MnZn ferrite as the magnetic shield layer. ⁇ L in the case of the degree is shown.
  • FIG. 15 is a graph obtained by measuring a difference in inductance value when a magnetic layer is added to the magnetic resin layer.
  • FIG. 15A is a diagram in which measured values of inductance in the absence of a DC magnetic field and FIG. 15B in the presence of a DC magnetic field are plotted against the thickness of the magnetic shield layer.
  • FIG. 16A is a plan view of a conventional single antenna device. 16B is a cross-sectional view taken along the line AA ′ of FIG. 16A.
  • an antenna device 10 includes a spiral coil-shaped loop antenna element 2 formed by winding a conducting wire 1 in a spiral shape, and a loop antenna element 2.
  • a loop antenna portion 3 having a magnetic sheet 4d on which the magnetic antenna layer 2 is placed, a magnetic resin layer 4a formed so as to embed the entire loop antenna element 2, and a magnetic resin layer 4b disposed on the lower surface of the magnetic resin layer 4a.
  • the antenna unit 13 is disposed on the inner diameter side of the loop antenna unit 3.
  • the antenna portion 13 is formed so as to embed the entire antenna element 12, the spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, the magnetic resin layer 4 b on which the antenna element 12 is placed, and the antenna element 12. Magnetic resin layer 4a.
  • the antenna unit 13 is arranged on the inner diameter of the loop antenna unit 3, it is preferable to arrange the antenna units so that the central axes of the respective antennas substantially coincide.
  • the antenna element 12 is not limited to the loop antenna as shown in FIGS. 1A and 1B, but may be another antenna element such as a planar antenna or a dielectric antenna for cellular phone communication.
  • Power feeding to the antenna and output from the antenna can be performed by connecting to an external circuit via lead wires from the conductive wires 1 and 11 embedded in the magnetic resin layers 4a and 4b. Since the magnetic resin layers 4a and 4b can be deformed in an uncured state, the lead wires can be embedded in the magnetic resin layers 4a and 4b in a pressing step during production described later. As shown in FIG.
  • the loop antenna element 2 and the antenna element 12 are formed to have a rectangular shape, but it is needless to say that the loop antenna element 2 and the antenna element 12 are formed in a circular shape, an elliptical shape, or any other shape.
  • the planar shape of the magnetic shield layer 4 made of the magnetic resin layer 4a or the like can be arbitrary.
  • the magnetic particles used for the magnetic resin layer 4a spherical, flat, or pulverized powders having a particle size of several ⁇ m to several tens of ⁇ m can be used. You may mix and use powder.
  • the complex permeability has frequency characteristics, and loss occurs due to the skin effect when the operating frequency is high. Adjust particle size and shape.
  • the magnetic particles used in the magnetic resin layer 4b are spherical, slender (cigar type), or flat (disc type) spheroids with a particle size of several to 100 ⁇ m, and their dimensional ratio (major axis / minor axis). Is 6 or less. Also in this case, not only a single magnetic powder but also powders having different powder diameters, materials, and dimensional ratios may be mixed and used.
  • the magnetic resin layer 4a is a layer in which the conducting wires 1 and 11 are embedded, the filling rate of the magnetic powder is reduced to ensure fluidity and deformability in an uncured state, whereas the magnetic resin layer 4b
  • the magnetic powder filling rate is set to be larger than that of the magnetic resin layer 4a so that the magnetic shield characteristics are improved.
  • a powder magnetic core obtained by mixing and molding metal magnetic powder, resin, lubricant, and the like can also be used as the magnetic resin layer 4b.
  • the particle shape of the magnetic resin layer 4b is a spheroid having a small dimensional ratio from a spherical shape, and has a large demagnetizing field coefficient and is not easily saturated with an external magnetic field. Since the particles having a large demagnetizing field coefficient form the magnetic resin layer 4b through the resin, the magnetic characteristics exhibit little influence of magnetic saturation even in a large DC magnetic field environment.
  • the magnetic resin layers 4a and 4b contain magnetic particles made of soft magnetic powder and a resin as a binder.
  • the magnetic particles are oxide magnetic materials such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based, Fe-Si-based, Fe-Si-Al-based, Fe- Ni-Si-Al-based crystal system, microcrystalline metal magnetic material, or Fe-Si-B system, Fe-Si-BC system, Co-Si-B system, Co-Zr system, Co-Nb Or amorphous metal magnetic particles such as Co—Ta.
  • the inductance value of the antenna device 10 is determined by the real part magnetic permeability (hereinafter simply referred to as magnetic permeability) of the magnetic material, but the magnetic permeability can be adjusted by the mixing ratio of the magnetic particles and the resin. . Since the relationship between the average magnetic permeability of the magnetic resin layers 4a and 4b and the magnetic permeability of the magnetic particles to be blended generally follows the logarithmic mixing rule with respect to the blending amount, the volume filling rate at which the interaction between the particles increases. It is preferable to set it to 40 vol% or more. The heat conduction characteristics of the magnetic resin layers 4a and 4b are also improved as the filling rate of the magnetic particles is increased.
  • the magnetic resin layers 4a and 4b are not limited to being composed of a single magnetic material. Two or more kinds of magnetic materials may be mixed and used, and a magnetic resin layer may be formed by laminating in multiple layers. Moreover, even if it is the same magnetic material, the particle size and / or shape of magnetic particles may be selected and mixed, or may be laminated in multiple layers. Further, the magnetic material or composition may be changed for each antenna. In addition to the magnetic particles, the magnetic resin layers 4a and 4b can contain a filler for improving thermal conductivity, particle filling property, and the like.
  • the magnetic sheet 4d is used for magnetic shielding of the loop antenna element 2, and is made of an oxide magnetic material such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based. Fe-Si-based, Fe-Si-Al-based, Fe-Ni-Si-Al-based crystalline or microcrystalline metal magnetic materials, or Fe-Si-B-based, Fe-Si-BC-based, Amorphous metal magnetic materials such as Co—Si—B, Co—Zr, Co—Nb, and Co—Ta can be used. In addition, a sheet prepared by compression molding or baking these magnetic particles with a binder may be used. The magnetic sheet 4d may be omitted when the performance of the antenna is sufficient or when it is affected by a DC magnetic field described later.
  • a resin that is cured by heat, ultraviolet irradiation, or the like is used.
  • a known material such as a resin such as an epoxy resin, a phenol resin, a melamine resin, a urea resin, or an unsaturated polyester, or a rubber such as silicone rubber, urethane rubber, acrylic rubber, butyl rubber, or ethylene propylene rubber is used.
  • a surface treatment agent such as a flame retardant, a reaction modifier, a crosslinking agent, or a silane coupling agent may be added to the above-described resin or rubber.
  • the conductive wire 11 forming the antenna element 12 is a case where the antenna unit 13 is used as a secondary charging coil for non-contact charging having a charging output capacity of about 5 W, and is used when the frequency is about 120 kHz. It is preferable to use a single wire made of Cu or an alloy containing Cu as a main component with a diameter of 20 mm to 0.45 mm. Alternatively, in order to reduce the skin effect of the conductive wire 11, a parallel line formed by bundling a plurality of fine wires thinner than the above-mentioned single wire, a knitted wire may be used, and one layer using a thin rectangular wire or a flat wire, Or it is good also as alpha winding of 2 layers.
  • the loop antenna unit 3 can also be arbitrarily determined in consideration of the frequency and current capacity used.
  • the loop antenna element 2 and the antenna element 12 a substrate in which a coil is formed by patterning a conductor on one side or both sides of a sub-substrate such as a phenol substrate or a flexible substrate such as polyimide can be used.
  • a substrate in which a coil is formed by patterning a conductor on one side or both sides of a sub-substrate such as a phenol substrate or a flexible substrate such as polyimide
  • the thickness of the antenna element can be reduced, so that the thickness of the antenna device 10 can be further reduced. Since a relatively large current flows in non-contact charging applications, the antenna element 12 is constituted by a coil using, for example, a single line or a double line, and the loop antenna element 2 for communication is patterned on one or both sides of a base material.
  • the coil may be formed of a so-called FPC (Flexible Printed Circuit) coil.
  • the number of turns can be increased by patterning the conductive wires 1 on both sides of the substrate and connecting the respective patterns in series via through holes.
  • the current capacity can be increased by connecting the conductive wires 1 patterned on both surfaces of the substrate in parallel through the through holes.
  • the antenna portion 13 is disposed on the inner diameter of the loop antenna portion 3, so that the inner diameter side of the loop antenna portion 3 does not become a dead space and is saved in space.
  • the antenna device 10 can be realized.
  • the magnetic flux density near the antenna can be increased, and the number of turns is reduced. Even if it is a number, a desired inductance value can be obtained. As a result, the number of turns can be reduced in order to obtain a desired inductance value, so that the direct current resistance of the conducting wires 1 and 11 can be reduced, and the loss can be reduced.
  • the heat conduction characteristics of the magnetic resin layer 4a can radiate heat more efficiently, and it is also possible to reduce the heat radiation space in the electronic device due to a decrease in heat generation.
  • the magnetic resin layer 4b serving as the magnetic shield layer of the antenna unit 13 can be widened, and the magnetic resin layer 4b is configured to be hard to be magnetically saturated, so there is no strong magnetic field in the vicinity. Regardless, good magnetic shielding performance can be exhibited.
  • sheets used for the magnetic resin layers 4a and 4b are prepared.
  • spherical metal magnetic particles having an average particle diameter of 5 ⁇ m are added to an acrylic resin together with a diluent and kneaded. This is processed using a sheet molding machine and dried to form a sheet having a predetermined thickness.
  • a sheet is formed in the same manner as the magnetic resin layer 4a.
  • the magnetic resin layer 4b is more highly filled with magnetic particles than the magnetic resin layer 4a in order to improve the magnetic shielding performance.
  • spherical amorphous metal magnetic particles having an average particle size of 25 ⁇ m and 5 ⁇ m are used, and the filling rate is increased by inserting particles having a small particle size between particles having a large particle size.
  • Each sheet formed in this manner is processed into a predetermined shape to form magnetic resin layers 4a and 4b.
  • the magnetic resin layer 4b is disposed in a mold and heated and pressed to obtain a hardened magnetic resin layer 4b having a predetermined shape.
  • a powder-molded material may be used as the magnetic resin layer 4b.
  • the magnetic resin layer 4a is placed on the magnetic resin layer 4b.
  • the loop antenna element 2 in which the magnetic sheet 4d is attached to the conductive wire 1 wound in a spiral shape and the antenna element 12 are placed so as to be embedded in the magnetic resin layer 4a having a predetermined thickness.
  • the lead wires of the lead wires 1 and 11 are placed on the magnetic resin layer 4b side, and the end portions of the lead wires 1 and 11 are placed outside along a groove provided in a part of the outer frame of the mold. To do.
  • the antenna device 10 is completed by heating and pressing to cure the magnetic resin layer 4a and removing it from the mold.
  • the lead wires of the conducting wires 1 and 11 are embedded in the magnetic resin layers 4a and 4b, and coil end portions for connection to an external circuit are drawn out.
  • the amount of the magnetic resin layer 4a may be an amount for completely embedding the loop antenna element 2 and the antenna element 12 as shown in FIGS. 1A and 1B, and a part of the loop antenna element 2 and the antenna element 12 is exposed. It may be the amount to be. Further, the position of the magnetic resin layer 4a is a position where it is embedded so as to fill all or part of the outer diameter portion or the inner diameter portion of the loop antenna element 2 and / or the antenna element 12, as will be described in a later-described modification. There may be.
  • the loop antenna element 2 and the antenna element 12 and the magnetic resin layers 4a and 4b are fixed by the manufacturing method as described above, it is not necessary to use an adhesive. Accordingly, the number of steps for applying the adhesive is reduced, and the antenna device 10 can be made thinner by the amount of the adhesive layer formed by applying the adhesive.
  • the magnetic resin layers 4a and 4b are kneaded with the resin as described above, they do not cause breakage such as cracking against an external impact, so it is necessary to stick a protective sheet on the surface. There is no. Therefore, the protective sheet sticking process can be reduced, and an increase in the thickness of the antenna device over the protective sheet can be suppressed.
  • the magnetic resin layers 4a and 4b are formed by kneading magnetic particles and a resin, and have an appropriate flexibility even after curing, so that the magnetic resin layers 4a and 4b can be mounted according to the shape inside the casing of the electronic device. it can.
  • [Modification 1] 2A and 2B are examples in which a magnetic resin layer 4a is disposed on the inner diameter portion of the loop antenna element 2 and the inner diameter and outer diameter portions of the antenna element 12.
  • the antenna device 10a includes a spiral coil-shaped loop antenna element 2 formed by winding a conducting wire 1 in a spiral shape, a magnetic sheet 4d on which the loop antenna element 2 is placed, and a magnetic element disposed on the lower surface of the magnetic sheet 4d.
  • a loop antenna unit 3 having a resin layer 4a and a magnetic resin layer 4b disposed on the lower surface of the magnetic resin layer 4a is provided.
  • the antenna unit 13 is disposed on the inner diameter side of the loop antenna unit 3.
  • the antenna portion 13 is formed so as to embed the entire antenna element 12, the spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, the magnetic resin layer 4 b on which the antenna element 12 is placed, and the antenna element 12.
  • Magnetic resin layer 4a is formed so as to embed the entire antenna element 12, the spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, the magnetic resin layer 4 b on which the antenna element 12 is placed, and the antenna element 12.
  • [Modification 2] 3A and 3B are examples in which the cross-sectional structure of the magnetic resin layer 4b is convex.
  • the antenna device 10b is disposed on a spiral coil-shaped loop antenna element 2 formed by winding the conducting wire 1 in a spiral shape, a magnetic sheet 4d on which the loop antenna element 2 is placed, and a lower surface of the magnetic sheet 4d.
  • a magnetic resin layer 4a disposed so as to fill the inner diameter side of the antenna element 2, and an inner diameter side of the loop antenna element 2 and disposed on the lower surface of the magnetic resin layer 4a, and a central portion of the inner diameter of the loop antenna element 2
  • a loop antenna portion 3 having a magnetic resin layer 4b disposed so as to fill the vicinity until the surface is exposed is provided.
  • the antenna unit 13 is disposed on the inner diameter side of the loop antenna unit 3 so as to surround the magnetic resin layer 4b.
  • the antenna portion 13 is formed so as to embed the entire antenna element 12, the spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, the magnetic resin layer 4 b on which the antenna element 12 is placed, and the antenna element 12. Magnetic resin layer 4a.
  • the amount of the magnetic resin layer 4a may be increased to the extent that it is in contact with the lead wire 1 on the innermost diameter side of the loop antenna element 2, and the antenna element as shown in FIGS. 3A and 3B. It is good also as a quantity of the grade which embeds 12 outermost conducting wires 1.
  • the shape of the magnetic resin layer 4b is not particularly limited to a flat plate shape or a convex shape as shown in FIGS. 3A and 3B.
  • the size and shape of the magnetic resin layer 4b can be arbitrarily set according to the required specifications such as the size and communication characteristics of the antenna device.
  • the magnetic resin layer 4a flows by pressing, the shape, thickness and the like can be controlled, and the position where the magnetic resin layer 4a is filled is, for example, only near the inner diameter side of the antenna element 12, Arbitrary control such as extending between the antenna element 2 and the antenna element 12 is possible.
  • [Modification 3] 4A and 4B show a modification in which the magnetic resin layer 4b is disposed only on the antenna portion 13 and a spacer 7 for supporting the loop antenna element 2 is disposed below the loop antenna element 2.
  • FIG. 1 shows a modification in which the magnetic resin layer 4b is disposed only on the antenna portion 13 and a spacer 7 for supporting the loop antenna element 2 is disposed below the loop antenna element 2.
  • the antenna device 10c includes a spiral coil-shaped loop antenna element 2 formed by winding a conducting wire 1 in a spiral shape, a magnetic sheet 4d on which the loop antenna element 2 is placed, and a magnetic sheet 4d via a magnetic resin layer 4a. And a loop antenna portion 3 having a spacer 7 disposed below.
  • the antenna unit 13 is disposed on the inner diameter side of the loop antenna unit 3.
  • the antenna portion 13 is formed so as to embed the entire antenna element 12, the spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, the magnetic resin layer 4 b on which the antenna element 12 is placed, and the antenna element 12. Magnetic resin layer 4a.
  • At least a part of the loop antenna element 2 and the magnetic sheet 4d is fixed to the spacer 7 by the magnetic resin layer 4a.
  • the magnetic sheet 4d may be fixed to both the magnetic resin layers 4a and 4b, or may be fixed to the magnetic resin layer 4b.
  • the spacer 7 When a nonmagnetic material is used as the spacer 7, magnetic interference between the loop antenna unit 3 and the antenna unit 13 can be reduced. Further, when a material having excellent thermal conductivity is used for the spacer 7, heat generated in the antenna unit 13 used for non-contact charging can be effectively radiated.
  • the magnetic sheet 4d on which the loop antenna element 2 is placed can be fixed by the magnetic resin layer 4a without using an adhesive, but the loop antenna element 2 is bonded in advance.
  • the loop antenna portion 3 may be configured by joining with an agent or the like, and then fixed by one or both of the antenna portion 13 and the magnetic resin layers 4a and 4b.
  • the spacer 7 and the magnetic resin layer 4b can be used in a state where they are fixed in advance.
  • the spacer 7 can be replaced by using a thick magnetic sheet 4d, or can be omitted.
  • [Modification 4] 5A and 5B the loop antenna portion 3 having the loop antenna element 2 and the magnetic sheet 4d, the antenna element 12 embedded in the magnetic resin layer 4a, and the magnetic resin disposed on the lower surface of the magnetic resin layer 4a are shown.
  • An example of a configuration in which the antenna unit 13 having the layer 4b is separately manufactured and the loop antenna unit 3 is connected to the magnetic resin layer 4b by the adhesive layer 5 in the final process of the manufacturing process is shown.
  • the spacer 7 used in Modification 3 (FIGS. 4A and 4B) may be used as the support substrate of the loop antenna unit 3, and the spacer 7 and the magnetic resin layer 4b are prepared in a state of being fixed in advance.
  • the adhesive layer 5 may be connected to the magnetic resin layer 4b.
  • the antenna device 10d is arranged on a spiral coil-shaped loop antenna element 2 formed by winding the conducting wire 1 in a spiral shape, a magnetic sheet 4d on which the loop antenna element 2 is placed, and a lower surface of the magnetic sheet 4d.
  • a loop antenna portion 3 having a magnetic resin layer 4b and an adhesive layer 5 for connecting the magnetic sheet 4d to the magnetic resin layer 4b.
  • the antenna unit 13 is disposed on the inner diameter side of the loop antenna unit 3.
  • the antenna unit 13 includes a spiral coil-shaped antenna element 12 formed by winding the conducting wire 11 in a spiral shape, and a magnetic resin layer 4a formed so as to embed the entire antenna element 12.
  • the magnetic resin layer 4b is fixed to the lower surface of the magnetic resin layer 4a.
  • [Modification 5] 6A and 6B show a case where a magnetic layer 4c is further disposed under the magnetic resin layer 4b of the antenna device 10 shown in FIGS. 1A and 1B. Since the magnetic resin layer 4b used in the antenna device 10e is obtained by blending magnetic particles in a resin, the magnetic permeability is lower than that of a bulk material having a high magnetic permeability configuration. For this reason, the magnetic shielding effect can be enhanced by further adding a magnetic layer 4c made of a magnetic material having a high magnetic permeability to the magnetic resin layer 4b.
  • the magnetic layer 4c is a magnetic material having a high magnetic permeability and uses a magnetic material as will be described later, but such a high magnetic permeability magnetic material is generally easily magnetically saturated. Therefore, when the antenna device is used in an environment where a DC magnetic field exists, it is preferable to use a configuration in which the magnetic resin layer 4b is mainly used and the magnetic layer 4c is supplementarily added.
  • the magnetic layer 4c is disposed on the lower surface side of the magnetic resin layer 4b, but is disposed so as to be embedded in the upper surface of the magnetic resin layer 4b or inside the magnetic resin layer 4b.
  • the shape may be smaller or larger than the magnetic resin layer 4b.
  • it may be used in combination with the configurations of the first to fourth modifications.
  • the magnetic layer 4c is a material having a high magnetic permeability, and is a magnetic oxide such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based, Fe-Si-based. , Fe-Si-Al-based, Fe-Ni-Si-Al-based crystalline, microcrystalline metallic magnetic materials, or Fe-Si-B, Fe-Si-BC, Co-Si-B Amorphous metal magnetic materials such as Co, Zr, Co—Nb, and Co—Ta can be used.
  • a magnetic oxide such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based, Fe-Si-based. , Fe-Si-Al-based, Fe-Ni-Si-Al-based crystalline, microcrystalline metallic magnetic materials, or Fe-Si-B, Fe-Si-BC, Co-Si-
  • a sheet prepared by compression molding or firing these magnetic particles with a binder, or a sheet prepared by kneading these magnetic materials with a flattening process, etc., into a flat shape with a resin or the like can also be used.
  • the lead portions 6 for storing the lead wires of the conducting wires 1 and 11 are provided in the magnetic resin layer 4b and the magnetic layer 4c.
  • the lead portion 6 is provided in the magnetic resin layer 4b and / or the magnetic layer 4c, and the conductor 1 , 11 can be housed to reduce the height of the antenna device 10.
  • [Modification 6] 7A and 7B show an example in which another loop antenna element 22 is provided on the inner diameter side of the antenna element 12 and all the antenna elements are embedded in the magnetic resin layer 4a.
  • a loop antenna portion 23 is formed on the inner diameter side of the antenna portion 13.
  • the antenna unit 13 can be used for non-contact charging
  • the loop antenna unit 3 can be used for an NFC antenna
  • the loop antenna unit 23 can be used for a foreign object detection coil, but there is no particular limitation.
  • the loop antenna unit 3 can be assigned freely, for example, for non-contact charging, or the loop antenna unit 23 can be used for another communication antenna.
  • the loop antenna element 22 can be constituted by a coil produced by patterning a metal conductor on one side or both sides of a base material, a so-called FPC (Flexible Printed Circuit) coil.
  • a magnetic sheet similar to the magnetic sheet 4d used in 2 can be provided.
  • the antenna element 12 is a loop antenna, and the loop antenna element 22 is arranged on the inner diameter thereof.
  • the antenna elements 12 and 22 can be arbitrarily arranged and configured such that the antenna elements 12 and 22 are arranged on the inner diameter of the loop antenna element 2 so as not to overlap each other.
  • the other antenna is arranged on the inner diameter of one loop antenna, the inner diameter side of the loop antenna does not become a dead space, and a space-saving antenna device is provided. realizable.
  • the antenna device of the present invention uses a magnetic resin layer that is hard to be magnetically saturated as the main magnetic shield, it can perform stable communication with little change in the inductance value of the coil even in an environment where a DC magnetic field is applied. Can do. Further, in the antenna device of the present invention, since the periphery of the coil is covered with a magnetic resin layer having magnetism and thermal conductivity, it is possible to increase the inductance of the coil and to release the heat generated in the coil. Heat generation is a problem especially when sending and receiving large electric power, but since heat can be released efficiently, it is possible to reduce the heat dissipation space in the electronic equipment due to the decrease in heat generation, which effectively reduces the size of the equipment. ⁇ Contributes to thinning.
  • the magnetic resin layers 4a and 4b are formed by kneading the resin with the magnetic particles, the magnetic resin layers 4a and 4b have flexibility even after curing, and are mounted and mounted according to the internal shape of the electronic device. Is possible.
  • An antenna device 10 forms a resonance circuit as a resonance coil (antenna) together with a resonance capacitor. And the comprised resonant circuit is mounted in a non-contact communication apparatus, and it communicates non-contact with this and another non-contact communication apparatus.
  • the non-contact communication device is a non-contact communication module 150 such as NFC (Near Field Communication) mounted on a mobile phone.
  • Another non-contact communication apparatus is, for example, a reader / writer 140 in a non-contact communication system.
  • the non-contact communication module 150 includes a secondary antenna unit 160 including a resonance circuit including a resonance capacitor and the antenna device 10 functioning as a resonance coil.
  • the non-contact communication module 150 In order to use the AC signal transmitted from the reader / writer 140 as a power source for each block, the non-contact communication module 150 generates a voltage corresponding to each block, and a rectification unit 166 that rectifies and converts the AC signal into DC power.
  • the non-contact communication module 150 includes a demodulation unit 164, a modulation unit 163, and a reception control unit 165 that operate by DC power supplied from the constant voltage unit 167, and a system control unit 161 that controls the overall operation. It has.
  • the signal received by the secondary antenna unit 160 is demodulated by the demodulator together with the DC power conversion by the rectification unit 166, and the transmission data from the reader / writer 140 is analyzed by the system control unit 161. Further, transmission data of the non-contact communication module 150 is generated by the system control unit 161, and the transmission data is modulated into a signal to be transmitted to the reader / writer 140 by the modulation unit 163 and is transmitted via the secondary antenna unit 160. Sent.
  • the reception control unit 165 generates a signal for adjusting the resonance frequency of the secondary antenna unit 160 based on the control of the system control unit 161 and adjusts the resonance frequency according to the communication state. Can do.
  • the reader / writer 140 of the non-contact communication system includes a primary side antenna unit 120 including a resonance circuit having a variable capacitance circuit composed of a resonance capacitor and the antenna device 10.
  • the reader / writer 140 is modulated by a system control unit 121 that controls the operation of the reader / writer 140, a modulation unit 124 that modulates a transmission signal based on a command from the system control unit 121, and a transmission signal from the modulation unit 124.
  • a transmission signal unit 125 for transmitting the carrier signal to the primary antenna unit 120.
  • the reader / writer 140 further includes a demodulator 123 that demodulates the modulated carrier signal transmitted by the transmission signal unit 125.
  • FIG. 9 shows a configuration example of the secondary side antenna unit 160.
  • the secondary side antenna unit 160 includes a series-parallel resonant circuit including variable capacitance capacitors CS1, CP1, CS2, and CP2 that form a resonance capacitor and an antenna device 10 that forms an inductance.
  • the primary antenna unit 120 has the same configuration.
  • Each capacitor CS1, CP1, CS2, CP2 of the variable capacitance circuit is controlled to have a DC bias voltage by the reception control unit 165 (in the case of the reader / writer 140, the transmission / reception control unit 122), set to an appropriate capacitance value, and the antenna.
  • the resonance frequency is adjusted together with the device 10 (Lant).
  • the reader / writer 140 performs impedance matching with the primary antenna unit 120 based on the carrier signal transmitted by the transmission signal unit 125, and based on the reception state of the non-contact communication module 150 on the reception side, Adjust the resonance frequency.
  • a modulation method and a coding method used in a general reader / writer are a Manchester coding method, an ASK (Amplitude Shift Keying) modulation method, and the like.
  • the carrier frequency is typically 13.56 MHz.
  • the transmission / reception control unit 122 monitors the transmission voltage and transmission current to control the variable voltage Vc of the primary antenna unit 120 so that impedance matching is obtained, and adjusts the impedance of the transmitted carrier signal.
  • the signal transmitted from the reader / writer 140 is received by the secondary antenna unit 160 of the non-contact communication module 150, and the signal is demodulated by the demodulation unit 164.
  • the content of the demodulated signal is determined by the system control unit 161, and the system control unit 161 generates a response signal based on the result.
  • the reception control unit 165 adjusts the resonance frequency and the like of the secondary antenna unit 160 based on the amplitude and voltage / current phase of the received signal so as to optimize the reception state. can do.
  • the non-contact communication module 150 modulates the response signal by the modulation unit 163 and transmits the response signal to the reader / writer 140 by the secondary side antenna unit 160.
  • the reader / writer 140 demodulates the response signal received by the primary antenna unit 120 by the demodulation unit 123, and executes necessary processing by the system control unit 121 based on the demodulated contents.
  • a resonance circuit using the antenna device 10 according to the present invention can constitute a power receiving device 190 that charges a secondary battery built in a mobile terminal such as a mobile phone in a contactless manner by the contactless charging device 180.
  • a non-contact charging method an electromagnetic induction method, magnetic resonance, or the like can be applied.
  • FIG. 10 shows a configuration example of a non-contact charging system including a power receiving device 190 such as a portable terminal to which the present invention is applied and a non-contact charging device 180 that charges the power receiving device 190 in a non-contact manner.
  • a power receiving device 190 such as a portable terminal to which the present invention is applied
  • a non-contact charging device 180 that charges the power receiving device 190 in a non-contact manner.
  • the power receiving apparatus 190 has substantially the same configuration as the non-contact communication module 150 described above.
  • the configuration of the non-contact charging device 180 is almost the same as the configuration of the reader / writer 140 described above. Accordingly, the reader / writer 140 and the non-contact communication module 150 having the same functions as the blocks described in FIG.
  • the carrier frequency to be transmitted / received is 13.56 MHz in many cases, whereas in the non-contact charging device 180, the frequency may be 100 kHz to several hundred kHz.
  • the non-contact charging device 180 performs impedance matching with the primary antenna unit 120 based on the carrier signal transmitted by the transmission signal unit 125, and resonates based on the reception state of the non-contact communication module on the receiving side. Adjust the resonant frequency of the circuit.
  • the transmission / reception control unit 122 monitors the transmission voltage and transmission current to control the variable voltage Vc of the primary antenna unit 120 so that impedance matching is obtained, and adjusts the impedance of the transmitted carrier signal.
  • the power receiving device 190 rectifies the signal received by the secondary antenna unit 160 by the rectifying unit 166, and charges the battery 169 with the rectified DC voltage according to the control of the charging control unit 170. Even when no signal is received by the secondary antenna unit 160, the battery 169 can be charged by driving the charging control unit 170 by an external power source 168 such as an AC adapter.
  • the signal transmitted from the non-contact charging device 180 is received by the secondary side antenna unit 160, and the signal is demodulated by the demodulation unit 164.
  • the content of the demodulated signal is determined by the system control unit 161, and the system control unit 161 generates a response signal based on the result.
  • the reception control unit 165 adjusts the resonance frequency and the like of the secondary antenna unit 160 based on the amplitude and voltage / current phase of the received signal so as to optimize the reception state. can do.
  • the characteristics when the magnetic resin layer 4b was used were evaluated as the influence of magnetic saturation on the inductance value of the coil.
  • the characteristic evaluation was performed by measuring the inductance value of a single coil shown in FIG. 11A.
  • FIG. 11B shows a cross section of the antenna device 10g for characteristic evaluation.
  • the antenna device 10g includes a loop antenna element 2 formed by a conductive wire 1 wound in a rectangular shape, and a magnetic resin layer 4b having a predetermined thickness connected to the loop antenna element 2 via an adhesive layer 5. Prepare. Moreover, it has the leader lines 3a and 3b for electrical connection with the loop antenna element 2 and an external circuit.
  • FIG. 11C shows a configuration of an antenna device 10h for characteristic evaluation for measuring the influence on the magnetic characteristics when a magnetic layer 4c described later is further added.
  • the measurement environment is shown in FIGS. 12A and 12B.
  • FIG. 12A shows a configuration of a receiving coil unit that evaluates a state without an external DC magnetic field.
  • the power receiving coil unit is an antenna device 10g for characteristic evaluation, and includes a loop antenna element 2 and a magnetic resin layer 4b.
  • a metal plate 31 simulating a battery pack was disposed on the surface of the magnetic resin layer 4b opposite to the surface on which the loop antenna element 2 is mounted.
  • the power receiving coil unit is a 14T rectangular coil (outer diameter 31 ⁇ 43 mm).
  • FIG. 12B shows a configuration of a receiving coil unit that evaluates a state where there is an external DC magnetic field by a magnet.
  • the power receiving coil unit is an antenna device 10h for evaluation, and includes a loop antenna element 2 and a magnetic resin layer 4b.
  • a metal plate 31 simulating a battery pack was disposed on the surface of the magnetic resin layer 4b opposite to the surface on which the loop antenna element 2 is mounted.
  • the power transmission coil unit was disposed so as to face the power reception coil unit.
  • the power transmission coil unit includes a spiral coil 30a and a magnetic shield material 30b, and is arranged so that the center and the central axis of the power reception coil unit are aligned.
  • a magnet 40 for generating a DC magnetic field is arranged at the center of the power transmission coil unit 30.
  • the transmission coil unit to which this magnet is attached is created based on the design A1 described in Non-Patent Document 2.
  • the power receiving coil unit and the power transmitting coil unit were arranged to face each other with a 2.5 mm acrylic plate therebetween.
  • an impedance analyzer 4294A manufactured by Agilent the inductance value of the coil was measured by changing the configuration of the magnetic resin layer 4b in each case.
  • the inductance value of the antenna device 10g having a magnetic shield layer composed only of the magnetic resin layer 4b as shown in FIG. 11B was measured.
  • FIGS. 13A and 13B and FIGS. 14A and 14B show graphs in which the inductance value of the power receiving coil unit equipped with a magnetic shield layer using various magnetic materials is measured.
  • the amount of change in the measured inductance value in the presence of a DC magnetic field with respect to the measured inductance value in the absence of a DC magnetic field is expressed as a percentage and is referred to as a relative inductance value ⁇ L.
  • the relative value ⁇ L of the inductance was plotted while changing the thickness tm of the magnetic resin layer 4b.
  • a negative inductance relative value ⁇ L indicates that the inductance value has decreased, and a positive value indicates that the inductance value has increased.
  • FIG. 13A shows the relative value ⁇ L of the inductance when the magnetic resin layer 4b having an average permeability of about 20 in which a spherical amorphous powder having a dimensional ratio (major axis / minor axis) of 6 or less is used as the magnetic resin layer 4b. Indicates.
  • FIG. 13B shows a relative inductance value ⁇ L when the magnetic resin layer 4b is a magnetic resin layer 4b having an average magnetic permeability of about 16 blended with spherical sendust powder having a dimensional ratio (major axis / minor axis) of 6 or less. Indicates.
  • FIG. 14A shows a case where a magnetic sheet having an average permeability of about 100 prepared by mixing flat powder having a sendust-based dimensional ratio (major axis / minor axis) of about 50 with a binder is used as the magnetic shield layer. Indicates the relative value of inductance.
  • FIG. 14B shows the relative value of the inductance when MnZn-based bulk ferrite having a magnetic permeability of about 1500 is used as the magnetic shield layer.
  • the inductance value of the coil is applied with a DC magnetic field. It has not decreased so much.
  • the reason why the relative value ⁇ L of the inductance is positive is that the magnetic shield layer constituting the power transmission coil unit is large, so that the magnetic flux is concentrated in the vicinity of the power reception coil unit.
  • FIG. 14A when a magnetic sheet made of flat magnetic powder is used as the magnetic shield layer, the magnetic shield layer is magnetically saturated due to the influence of the DC magnetic field of the magnet mounted on the transmission coil unit. And the inductance value is greatly reduced. This shows that this tendency is more remarkable because the thinner the shield layer, the more likely it is to become magnetically saturated.
  • FIG. 14B it is shown that when ferrite is used as the magnetic shield layer, the inductance value is greatly reduced as in the case of FIG. 14A.
  • the change in coil inductance is small even in a magnet-mounted transmission coil unit or in an environment with a large DC magnetic field, and thus the change in the resonance frequency of the power receiving module is small and stable. Power transmission is possible.
  • the power receiving coil unit is a 14T rectangular coil (outer diameter 31 mm ⁇ 43 mm).
  • FIG. 11B and FIG. 11C As a characteristic evaluation method, as shown in FIG. 11B and FIG. 11C, when only the magnetic resin layer 4b is used as the magnetic shield layer (FIG. 11B), a 50 ⁇ m thick magnetic layer 4c is formed on the lower surface of the magnetic resin layer 4b. In the case of pasting (FIG. 11C), the inductance value of each coil was measured. In these cases, the inductance value was measured by changing the thickness of the magnetic resin layer 4b. Therefore, the total thickness of the magnetic shield layer is the magnetic resin layer 4b plus the thickness of the magnetic layer 4c of 50 ⁇ m.
  • the magnetic resin layer 4b of the power receiving coil unit (evaluation antenna apparatus 10h) one having an average magnetic permeability of about 30 blended with spherical amorphous powder having a size ratio of 6 or less is used, and for the magnetic layer 4c, a sendust-based one is used.
  • a powder having a magnetic permeability of about 100 was prepared by mixing flat powder having a size ratio of about 50 with a binder.
  • 15A and 15B are graphs plotting the inductance value L with respect to the thickness tm of the magnetic shield layer 4.
  • the inductance value was measured using an impedance analyzer 4294A manufactured by Agilent, and plotted as an inductance value L at a frequency of 120 kHz generally used in a non-contact charging system.
  • FIG. 15A shows a measurement result of the inductance value L of the coil when no DC magnetic field is applied, that is, in the case of the configuration of the power receiving coil unit of FIG. 12A.
  • FIG. 15B shows the measurement result of the inductance value L in the case of the configuration of the receiving coil unit of FIG. 12B in which a DC magnetic field is applied by a magnet.
  • the inductance value of the coil can be improved by replacing a part of the magnetic resin layer 4b with the thin magnetic layer 4c.
  • the influence of magnetic saturation is large, so that the inductance value is reduced for all coils.
  • the magnetic layer 4c has a higher effect of increasing the inductance than the magnetic resin layer 4b.
  • the magnetic resin layer 4b has a higher effect of improving the inductance when a strong magnetic field is applied.
  • the antenna device of the present invention has a magnetic resin layer that is strong against magnetic saturation, it is possible to stably supply power with little change in coil inductance even in an environment where a strong magnetic field is applied. Furthermore, by adjusting the thicknesses of the magnetic resin layer and the magnetic layer, the balance between the magnitude of the coil inductance and the rate of change of the coil inductance under a strong magnetic field environment can be adjusted. It can be used not only for non-contact communication but also for non-contact power transmission (non-contact charging), and each loop antenna part and antenna part can be optimally designed according to the application and the electronic equipment installed. it can.

Abstract

L'invention concerne un appareil d'antenne, une pluralité d'antennes étant efficacement agencées de manière compacte et la performance des antennes étant améliorée. Un dispositif d'antenne (10) comporte une partie d'antenne cadre (3) et une partie d'antenne (13) disposée dans ladite partie d'antenne cadre (3). La partie d'antenne cadre (3) et la partie d'antenne (13) ont des couches de résine magnétique (4a, 4b) contenant des grains magnétiques. Au moins une partie de la partie d'antenne cadre (3) et/ou au moins une partie de la partie d'antenne (13) sont incorporées dans lesdites couches de résine magnétique (4a, 4b).
PCT/JP2014/056313 2013-03-19 2014-03-11 Appareil d'antenne et dispositif électronique WO2014148312A1 (fr)

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EP3282460A4 (fr) * 2015-04-08 2018-07-04 Nissan Motor Co., Ltd. Unité de bobine de transmission d'énergie sans contact
US10068704B2 (en) 2016-06-23 2018-09-04 Qualcomm Incorporated Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system
US20200076232A1 (en) * 2018-08-31 2020-03-05 3M Innovative Properties Company Coil and method of making same
EP3713045A1 (fr) * 2019-03-19 2020-09-23 Koninklijke Philips N.V. Dispositif et procédé de transfert de puissance sans fil et détection de corps étrangers

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JP6568133B2 (ja) * 2017-03-30 2019-08-28 パナソニック株式会社 伝送コイル及び送電装置
JP7069912B2 (ja) * 2018-03-22 2022-05-18 Tdk株式会社 コイルユニット、ワイヤレス送電装置、ワイヤレス受電装置、及びワイヤレス電力伝送システム
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WO2016121854A1 (fr) * 2015-01-28 2016-08-04 株式会社スマート Système de capteur d'émission/réception, carte multi-fonction, et dispositif portable
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US10068704B2 (en) 2016-06-23 2018-09-04 Qualcomm Incorporated Shielded antenna to reduce electromagnetic interference (EMI) and radio frequency (RF) interference in a wireless power transfer system
US20200076232A1 (en) * 2018-08-31 2020-03-05 3M Innovative Properties Company Coil and method of making same
US11664850B2 (en) * 2018-08-31 2023-05-30 3M Innovative Properties Company Coil and method of making same
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WO2020187507A1 (fr) * 2019-03-19 2020-09-24 Koninklijke Philips N.V. Dispositif et procédé de transfert d'énergie sans fil et détection de corps étranger améliorée
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