WO2016152662A1 - Appareil d'antenne et dispositif électronique - Google Patents

Appareil d'antenne et dispositif électronique Download PDF

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Publication number
WO2016152662A1
WO2016152662A1 PCT/JP2016/058235 JP2016058235W WO2016152662A1 WO 2016152662 A1 WO2016152662 A1 WO 2016152662A1 JP 2016058235 W JP2016058235 W JP 2016058235W WO 2016152662 A1 WO2016152662 A1 WO 2016152662A1
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WO
WIPO (PCT)
Prior art keywords
conductive member
antenna
antenna device
coil conductor
coil
Prior art date
Application number
PCT/JP2016/058235
Other languages
English (en)
Japanese (ja)
Inventor
中野信一
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201690000481.9U priority Critical patent/CN207149699U/zh
Publication of WO2016152662A1 publication Critical patent/WO2016152662A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • 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

Definitions

  • the present invention relates to an antenna device, and more particularly to an antenna device used in, for example, an RFID system or a short-range wireless communication system.
  • the present invention also relates to an electronic device, and more particularly to an electronic device used in, for example, an RFID system or a short-range wireless communication system.
  • an antenna device including a metal member and a coil antenna as disclosed in Patent Document 1 is known, and by using a metal casing of an electronic device as the metal member, the strength of the casing is increased. A method to compensate for this is considered.
  • the metal member having the opening and the plurality of slits that connect the opening and the outer edge portion is combined with the coil antenna and acts as a booster antenna for the coil antenna, so that the communicable distance can be increased. .
  • the antenna device when the metal member is coupled to the coil antenna and a current flows along the periphery of the opening of the metal member, the current flows along the plurality of slits and further along the periphery of the metal member. Therefore, the current intensity in the formation area of the plurality of slits becomes relatively large, and the magnetic field intensity in the slit formation direction can be increased. Therefore, the degree of freedom in design of directivity can be increased by the above configuration.
  • Patent Document 1 since the metal member is divided into a plurality of parts by the plurality of slits, the strength of the antenna device and the casing is lowered. In addition, since the metal member is divided into a plurality of parts by the plurality of slits, potential differences may occur in the plurality of metal members, and unexpected electromagnetic radiation, noise, and the like are likely to occur in various use frequency bands.
  • An object of the present invention is to provide an antenna device that suppresses a decrease in strength of an antenna device and has good characteristics in a configuration including a conductive member, and an electronic device including the antenna device.
  • the antenna device of the present invention A coil conductor having a coil opening; A conductive member having a plurality of notches extending inward from the outer edge; With The coil opening overlaps the plurality of notches.
  • the conductive member since the coil conductor is coupled to the notch portion of the conductive member by electric field coupling, magnetic field coupling, or electromagnetic field coupling, the conductive member functions as a booster antenna for the coil conductor. Therefore, compared to the case of only the coil conductor, the substantial coil opening that functions as an antenna becomes larger, and the range and distance for radiating (magnetizing) magnetic flux becomes larger, so that it becomes easier to couple with the antenna coil on the other side. .
  • the conductive member is not divided into a plurality of parts, it is possible to suppress a decrease in strength of the antenna device and the casing. Further, in this configuration, since the conductive member is not divided into a plurality of parts, it is possible to suppress the occurrence of unexpected electromagnetic wave radiation and noise in various use frequency bands.
  • the said notch has an opening formed inside the said electroconductive member, and a slit part extended toward the said opening from the said outer edge of the said electroconductive member.
  • the slit portion extending from the outer edge of the conductive member toward the opening portion has a relatively small width in the direction orthogonal to the extending direction of the notch portion compared to the opening portion. Therefore, with this configuration, a region where the coil conductor is close to the outer edge of the conductive member is widened, and the degree of coupling between the coil conductor and the conductive member is increased.
  • the degree of coupling between the booster antenna and the coil conductor is related to the amount of electromagnetic energy that can be received by the feeding circuit (first feeding circuit described later) via the booster antenna. A device can be realized.
  • the conductive member has a plurality of sides on the outer edge, and the plurality of notches extend from the different sides toward the inside. be able to.
  • the plurality of cutout portions may have a structure extending inward from opposite sides in plan view.
  • none of the plurality of cutout portions has a stretching direction on the same straight line.
  • the extending direction is not on the same straight line in any of the plurality of notches, it is possible to suppress the strength of the antenna device from being extremely lowered with respect to one bending direction.
  • stretching direction is not on the same straight line, the area
  • the electronic device of the present invention An antenna device; A first power supply circuit using the first frequency band as a use frequency; With The antenna device is A coil conductor having a coil opening; A conductive member having a plurality of notches extending inward from the outer edge; Have The coil opening overlaps the plurality of notches, The first power feeding circuit is connected to the coil conductor, or is coupled to the coil conductor by electric field coupling, magnetic field coupling, or electromagnetic field coupling.
  • a radiating element of a standing wave antenna in which a standing wave is generated in a second frequency band higher than the first frequency band.
  • a radiating element of a standing wave antenna in which a standing wave is generated in a second frequency band higher than the first frequency band.
  • the said electroconductive member is a part or all of the housing
  • the conductive member is preferably a functional component included in the electronic device. With this configuration, there is no need to separately provide a conductive member, and manufacturing is easy and cost can be reduced.
  • a circuit board may be further provided, and the functional component may be a planar conductor formed on the circuit board.
  • the functional component may be a shield case.
  • a reduction in strength of the antenna device can be suppressed, and an antenna device with good characteristics and an electronic device including the antenna device can be realized.
  • FIG. 1 is an external perspective view of an antenna device 101 according to the first embodiment.
  • FIG. 2 is a plan view of the antenna device 101.
  • FIG. 3 is a plan view of the antenna device 101 showing the relationship between the current flowing through the coil conductor 31 and the current generated in the conductive member 11.
  • FIG. 4 is a plan view of the antenna device 102 according to the second embodiment.
  • FIG. 5A is a plan view of an antenna device 103A according to the third embodiment, and FIG. 5B is an antenna showing the relationship between the current flowing in the coil conductor 33A and the current generated in the conductive member 13A. It is a top view of apparatus 103A.
  • FIG. 6A is a plan view of the antenna device 103B according to the third embodiment, and FIG.
  • FIG. 6B is an antenna showing the relationship between the current flowing in the coil conductor 33B and the current generated in the conductive member 13B. It is a top view of the apparatus 103B.
  • FIG. 7A is a plan view of an antenna device 104A according to the fourth embodiment, and FIG. 7B is an antenna showing the relationship between the current flowing in the coil conductor 34A and the current generated in the conductive member 14A. It is a top view of the apparatus 104A.
  • FIG. 8A is a plan view of the antenna device 104B according to the fourth embodiment, and FIG. 8B is an antenna showing the relationship between the current flowing through the coil conductor 34B and the current generated in the conductive member 14B. It is a top view of the apparatus 104B.
  • FIG. 7A is a plan view of an antenna device 104A according to the fourth embodiment
  • FIG. 8B is an antenna showing the relationship between the current flowing through the coil conductor 34B and the current generated in the conductive member 14B. It is a top view of the
  • FIG. 9 is an external perspective view of the antenna device 105 according to the fifth embodiment.
  • FIG. 10 is a bottom view of the electronic apparatus 201 according to the sixth embodiment.
  • FIG. 11 is a front view of an electronic apparatus 202 according to the seventh embodiment.
  • 12A is a bottom view of the electronic device 202
  • FIG. 12B is a cross-sectional view taken along the line AA in FIG. 11, showing a structure inside the housing of the electronic device 202.
  • FIG. FIG. 13 is a plan view showing a structure inside the housing of the electronic device according to the eighth embodiment.
  • FIG. 14 is a plan view showing the structure inside the housing of the electronic device according to the ninth embodiment.
  • the “antenna device” is an antenna that radiates magnetic flux.
  • the antenna device is an antenna used for near-field communication using magnetic field coupling with an antenna on the communication partner side, and is used for communication such as NFC (Near Field Communication), for example.
  • the antenna device uses, for example, an HF band, and is used particularly at a frequency near 13.56 MHz or 13.56 MHz.
  • the size of the antenna device is very small compared to the wavelength ⁇ at the frequency used, and the radiation characteristics of electromagnetic waves in the frequency band used are poor.
  • the antenna device has a length obtained by extending a coil conductor included in the antenna device and is ⁇ / 10 or less.
  • the wavelength here refers to the effective wavelength in consideration of the wavelength shortening effect by the dielectric property and permeability of the base material on which the antenna is formed.
  • Both ends of the coil conductor are connected to a power feeding circuit that uses a use frequency band (HF band, particularly 13.56 MHz or near 13.56 MHz).
  • HF band particularly 13.56 MHz or near 13.56 MHz.
  • FIG. 1 is an external perspective view of an antenna device 101 according to the first embodiment.
  • FIG. 2 is a plan view of the antenna device 101.
  • the structure of the antenna device 101 is simplified for easy understanding of the drawings and the principle. The same applies to an external perspective view and a plan view in the following embodiments.
  • the antenna device 101 includes a conductive member 11 and a coil conductor 31 having a coil opening CH.
  • the conductive member 11 is a flat plate having conductivity and a rectangular planar shape.
  • the lateral direction of the conductive member 11 coincides with the lateral direction (X direction in FIG. 2)
  • the longitudinal direction coincides with the longitudinal direction (Y direction).
  • the conductive member 11 has a first side S1 and a second side S2 on the outer edge located in the lateral direction (X direction in FIG. 2).
  • the first side S ⁇ b> 1 and the second side S ⁇ b> 2 are sides facing each other in plan view (when the conductive member 11 is viewed from the Z direction).
  • the conductive member 11 has notches 21 and 22.
  • the notch 21 extends from the first side S1, which is the outer edge of the conductive member 11, inwardly (in the + X direction in FIG. 2).
  • the notch 22 extends inward ( ⁇ X direction in FIG. 2) from the second side S2, which is the outer edge of the conductive member 11.
  • both of the cutout portions 21 and 22 of the antenna device 101 are arranged on the same straight line (on the X axis).
  • the conductive member 11 according to the present embodiment constitutes a part of the casing of the electronic device.
  • the coil conductor 31 is a spiral conductor pattern having a rectangular planar shape, and both ends thereof are directly connected to a first power supply circuit (not shown).
  • the coil conductor 31 in the present embodiment is disposed on one main surface of the conductive member 11 (the surface on the front side of the conductive member 11 in FIG. 2).
  • the coil conductor 31 is, for example, a patterned Cu foil, and is formed on the main surface of a resin sheet such as polyimide (PI) or liquid crystal polymer (LCP).
  • the first power supply circuit is a first frequency band (HF band) IC.
  • the length of the coil opening CH in the vertical direction (Y direction) is substantially the same as the length of the notches 21 and 22 in the vertical direction (Y direction), and the coil conductor 31 has a coil opening CH.
  • the single coil opening CH of the antenna device 101 overlaps both of the cutout portions 21 and 22 in a plan view (viewed from the Z direction) so that the coil opening CH straddles the cutout portions 21 and 22. Is formed.
  • FIG. 3 is a plan view of the antenna device 101 showing the relationship between the current flowing through the coil conductor 31 and the current generated in the conductive member 11.
  • the currents i1 and i2 generated in the conductive member 11 are in-phase (in-phase) and are superimposed (added), so that a current i1 + current i2 is generated along the outer edge of the conductive member 11.
  • the coil conductor 31 is coupled to the conductive member 11 via an electric field, a magnetic field, or an electromagnetic field.
  • the conductive member 11 functions as a booster antenna for the coil conductor 31.
  • a substantial coil opening that functions as an antenna becomes larger than the case of only the coil conductor 31. Therefore, it becomes easy to couple
  • the operation in the case where the antenna device 101 is a transmission-side antenna has been described. However, even if transmission / reception is reversed by the antenna reversibility theorem. That is, the same operation is performed when the antenna device 101 is a receiving antenna.
  • the conductive member 11 is not divided into a plurality of parts, a decrease in strength of the antenna device and the housing can be suppressed. Furthermore, in this configuration, since the conductive member 11 is not divided into a plurality of parts, it is possible to suppress the occurrence of unexpected electromagnetic wave radiation, noise, and the like in various use frequency bands.
  • the notches 21 and 22 are provided on the two sides (the first side S1 and the second side S2) located in the short direction (X direction) of the conductive member 11 . It is not limited to this configuration. As long as the conductive member 11 functions as a booster antenna for the coil conductor 31, the cutout portions may be provided on two sides positioned in the longitudinal direction of the conductive member 11.
  • planar shape of the conductive member 11 is a rectangle is shown, but the present invention is not limited to this configuration.
  • the planar shape of the conductive member 11 can be appropriately changed within a range that functions as a booster antenna for the coil conductor 31 such as a square, a polygon, a circle, and an ellipse.
  • the conductive member 11 is a flat plate
  • the thickness of the conductive member 11 in the height direction (Z direction) can also be changed as appropriate within the range where the above-described functions and effects are achieved.
  • the conductive member 11 may have a three-dimensional structure (three-dimensional structure) as long as it functions as a booster antenna for the coil conductor 31 as will be described in detail later. Further, as will be described in detail later, the entire housing of the electronic device may be constituted by the conductive member 11.
  • planar shape of the coil conductor 31 is a rectangle
  • the planar shape of the coil conductor 31 is appropriately changed within a range in which the coil opening CH satisfies a configuration in which the coil opening CH overlaps the two or more cutout portions 21 and 22 in a plan view (viewed from the Z direction).
  • the planar shape of the coil conductor 31 may be a polygon, a circle, an ellipse, or the like, for example.
  • the coil conductor 31 is a spiral conductor pattern.
  • the present invention is not limited to this configuration.
  • the coil conductor 31 is disposed on one main surface of the conductive member 11 (the surface on the front side of the conductive member 11 in FIG. 2), but the present invention is not limited to this configuration.
  • the coil conductor 31 may be configured to be disposed on the other main surface of the conductive member 11 (the surface on the back side of the conductive member 11 in FIG. 2).
  • the length of the coil opening CH of the coil conductor 31 in the vertical direction (Y direction) is substantially the same as the length of the notches 21 and 22 in the vertical direction (Y direction).
  • positioned so that the position of the vertical direction (Y direction) of coil opening CH may correspond to the notch parts 21 and 22 was shown, it is not limited to this structure.
  • the coil conductor 31 and the conductive member 11 can be coupled. Therefore, compared with the present embodiment, the coil conductor 31 may be formed to be shifted in the vertical direction (Y direction) or the horizontal direction (X direction). Further, the length of the coil opening CH in the vertical direction may be shorter or longer than the length of the cutout portions 21 and 22 in the vertical direction (Y direction).
  • the first power supply circuit may be configured to be coupled to the coil conductor 31 via an electric field, a magnetic field, or an electromagnetic field.
  • the planar shape of the notches 21 and 22 is a rectangle is shown, but the present invention is not limited to this configuration.
  • the notches 21 and 22 may have bent portions.
  • the shape, quantity, size, and the like of the cutout portions can be appropriately changed within a range in which the conductive member 11 functions as a booster antenna for the coil conductor 31.
  • the shapes and sizes of the cutout portions 21, 22 are different from each other. May be.
  • the cutout portions 21 and 22 extend from the opposite sides to the inside is shown, but the present invention is not limited to this configuration.
  • the plurality of notches may have a structure extending inwardly from sides that do not face each other.
  • the present invention is not limited to this configuration.
  • the plurality of notch portions may have different extending directions.
  • FIG. 4 is a plan view of the antenna device 102 according to the second embodiment.
  • the structure of the antenna device 102 is simplified for easy understanding of the drawing and the principle.
  • the antenna device 102 according to the second embodiment is different from the antenna device 101 according to the first embodiment in the shape of the notches 21 and 22. That is, the antenna device 102 is different from the antenna device 101 in the configuration of the conductive member 12. Other configurations are the same as those of the antenna device 101 according to the first embodiment.
  • the notch 21 in the present embodiment has an opening 23A and a slit 24A.
  • the opening 23A is formed inside the conductive member 12, and the slit 24A extends from the first side S1 of the conductive member 12 toward the opening 23A.
  • the slit portion 24 ⁇ / b> A has a relatively small width in the direction (Y direction) orthogonal to the extending direction of the notch portion 21 compared to the opening portion 23 ⁇ / b> A.
  • the notch 22 in the present embodiment has an opening 23B and a slit 24B.
  • the opening 23B is formed inside the conductive member 12, and the slit 24B extends from the second side S2 of the conductive member 12 toward the opening 23B.
  • the slit portion 24B has a relatively small width in the direction (Y direction) perpendicular to the extending direction of the notch portion 22 compared to the opening portion 23B.
  • the antenna device 102 has the same basic configuration as the antenna device 101 according to the first embodiment, and can exhibit the same operations and effects as the antenna device 101.
  • the slits 24A and 24B extending from the outer edge of the conductive member 12 toward the openings 23A and 23B have a width in the direction (Y direction) perpendicular to the extending direction of the notches 21 and 22 at the opening. It is relatively small compared. Therefore, the area where the coil conductor 31 is close to the first side S1 and the second side S2 that are the outer edges of the conductive member 12 is widened, and the degree of coupling between the coil conductor 31 and the conductive member 12 is increased. Since the degree of coupling between the booster antenna and the coil conductor 31 is related to the amount of electromagnetic energy that can be received by the first feeding circuit via the booster antenna, this configuration can eventually realize an antenna device with good characteristics.
  • the extending direction of the slit portions 24A and 24B is the same as the extending direction of the notched portions 21 and 22 (X direction in FIG. 4) is shown, but the present invention is limited to this configuration. is not.
  • the extending direction and shape of the slit portions 24 ⁇ / b> A and 24 ⁇ / b> B can be appropriately changed as long as the conductive member 12 functions as a booster antenna for the coil conductor 31.
  • planar shape of the openings 23A and 23B is a rectangle is shown, but the present invention is not limited to this configuration.
  • the planar shape of the openings 23A and 23B can be changed as appropriate in a plan view (viewed from the Z direction), such as a circle, an ellipse, or a polygon.
  • both of the cutout portions 21 and 22 are configured by the opening portions 23A and 23B and the slit portions 24A and 24B, but either one of the cutout portions 21 and 22 is the opening portion and the slit portion. It is also possible to adopt a configuration in which the other is a notch similar to that of the first embodiment.
  • FIG. 5A is a plan view of an antenna device 103A according to the third embodiment
  • FIG. 5B is an antenna showing the relationship between the current flowing in the coil conductor 33A and the current generated in the conductive member 13A. It is a top view of apparatus 103A.
  • FIG. 6A is a plan view of the antenna device 103B according to the third embodiment
  • FIG. 6B is an antenna showing the relationship between the current flowing in the coil conductor 33B and the current generated in the conductive member 13B. It is a top view of the apparatus 103B.
  • the structures of the antenna devices 103A and 103B are simplified for easy understanding of the drawings and the principle. .
  • the antenna device 103A is different from the antenna device 101 according to the first embodiment in the positions of the notches 21 and 22 with respect to the conductive member.
  • the antenna device 103B is different from the antenna device 103A in the shape of the coil conductor. Other configurations are substantially the same as those of the antenna device 101 according to the first embodiment.
  • the antenna device 103A includes a conductive member 13A and a coil conductor 33A having a coil opening CH. As shown in FIG. 5A, the conductive member 13A of the antenna device 103A has a configuration in which one of the notches 21 and 22 is shifted in the vertical direction (Y direction). Therefore, neither of the cutout portions 21 and 22 of the antenna device 103A is arranged on the same straight line (on the X axis), and the extending direction is not on the same straight line.
  • the coil conductor 33A is a spiral conductor pattern having a rectangular planar shape, and both ends thereof are connected to a first power supply circuit (not shown).
  • the coil conductor 33A has a larger coil opening CH than the coil conductor 31 of the antenna device 101 because the length of the coil opening CH in the vertical direction (Y direction) is large.
  • the coil conductor 33A is arranged so that the notches 21 and 22 are located in the coil opening CH in the longitudinal direction (Y direction). Even in such a configuration, the single coil opening CH of the antenna device 103A overlaps the notches 21 and 22 that are configured to be shifted in the vertical direction (Y direction) in plan view.
  • the current density at the edge of the cutout portion 21 of the conductive member 13A is high due to the edge effect.
  • the notch 21 faces the first side S1, which is the outer edge of the conductive member 13A. Therefore, the current i1 induced in the notch 21 flows to the first side S1 due to the edge effect.
  • the current i0 causes electric field coupling, magnetic field coupling, or electromagnetic field coupling to the notch 22 of the conductive member 13A.
  • a current i2 due to is induced. That is, in the portion where the coil conductor 33A and the conductive member 13A are close to each other, the current i2 is generated in the cutout portion 22 by the current i0 in the direction in which the current i0 is canceled (clockwise in FIG. 5B). At this time, the current density at the edge of the cutout portion 22 of the conductive member 13A is high due to the edge effect.
  • the notch 22 faces the second side S2, which is the outer edge of the conductive member 13A. Therefore, the current i2 induced in the notch 22 flows to the second side S2 due to the edge effect.
  • the currents i1 and i2 generated in the conductive member 13A are in-phase (in-phase) and are superimposed (added), so that a current i1 + current i2 is generated along the outer edge of the conductive member 13A.
  • the coil conductor 33A is coupled to the conductive member 13A via an electric field, a magnetic field, or an electromagnetic field.
  • the antenna device 103A has the same basic configuration as the antenna device 101 according to the first embodiment, and can exhibit the same operations and effects as the antenna device 101.
  • the antenna device 103A since the extending directions of none of the plurality of cutout portions are not collinear, the strength of the antenna device is extremely reduced with respect to one bending direction. Can be suppressed. Moreover, in this structure, since the extending
  • the antenna device 103B is a spiral conductor pattern in which the planar shape of the coil conductor 33B is a crank shape, and both ends thereof are connected to a first feeding circuit (not shown). That is, as shown in FIG. 6A, the coil conductor 33B has a structure in which the coil conductor 31 of the antenna device 101 is shifted in the vertical direction (Y direction) at the central portion in the horizontal direction (X direction).
  • the length in the vertical direction (Y direction) of the coil opening CH is substantially the same as the length in the vertical direction (Y direction) of the notches 21 and 22, and the coil conductor 33B is It arrange
  • the antenna device 103B has the same basic configuration as the antenna device 103A, and can exhibit the same operations and effects as the antenna device 103B.
  • the area occupied by the coil conductor 33B can be reduced by appropriately changing the shape of the coil conductor 33B in accordance with the location and shape of the notches 21 and 22 as in the present embodiment. Further, by reducing the area of the coil opening facing the area where the notches 21 and 22 of the conductive member 13B are not formed, unnecessary coupling between the coil conductor 33B and a device other than the antenna device 103B is suppressed. Can do.
  • the planar shape of the coil conductor can be changed as appropriate, such as a polygon, a circle, and an ellipse.
  • FIG. 7A is a plan view of an antenna device 104A according to the fourth embodiment
  • FIG. 7B is an antenna showing the relationship between the current flowing in the coil conductor 34A and the current generated in the conductive member 14A. It is a top view of the apparatus 104A.
  • FIG. 8A is a plan view of the antenna device 104B according to the fourth embodiment, and FIG. 8B is an antenna showing the relationship between the current flowing through the coil conductor 34B and the current generated in the conductive member 14B. It is a top view of the apparatus 104B.
  • FIG. 7A, FIG. 7B, FIG. 8A, and FIG. 8B the structures of the antenna devices 104A and 104B are simplified for easy understanding of the drawings and the principle. .
  • the antenna device 104A is different from the antenna device 101 according to the first embodiment in the positions of the notches 21 and 22 with respect to the conductive member.
  • the antenna device 104B is different from the antenna device 104A in the shape of the coil conductor. Other configurations are substantially the same as those of the antenna device 101 according to the first embodiment.
  • the antenna device 104A includes a conductive member 14A and a coil conductor 34A having a coil opening CH.
  • the conductive member 14A further includes a third side S3 and a fourth side S4 on the outer edge in the vertical direction (Y direction in FIG. 7A). As shown in FIG. 7A, the third side S3 and the fourth side S4 are sides facing each other in plan view.
  • the notch 21 of the conductive member 14A extends from the first side S1, which is the outer edge of the conductive member 14A, toward the inside (the + X direction in FIG. 7A).
  • the notch 22 extends inward ( ⁇ Y direction) from the fourth side S4, which is the outer edge of the conductive member 14A.
  • the first side S1 and the fourth side S4 are not sides facing each other in plan view. Therefore, neither of the cutout portions 21 and 22 of the antenna device 104A is arranged on the same straight line, and the extending direction is not on the same straight line.
  • the coil conductor 34A is a spiral conductor pattern having a rectangular planar shape, and both ends thereof are directly connected to a first power supply circuit (not shown).
  • the coil conductor 34A is disposed at one corner (upper left corner in FIG. 7A) of the conductive member 14A in plan view. That is, the coil conductor 34A is disposed at a position close to the two sides (the first side S1 and the fourth side S4) of the conductive member 14A.
  • the single coil opening CH of the antenna device 104A overlaps the two notches 21 and 22 in a plan view (viewed from the Z direction).
  • the current density at the edge of the cutout portion 21 of the conductive member 14A is high due to the edge effect.
  • the notch 21 faces the first side S1, which is the outer edge of the conductive member 14A. Therefore, the current i1 induced in the notch 21 flows along the first side S1 in a direction away from the notch 21 due to the edge effect.
  • the current i0 causes electric field coupling, magnetic field coupling, or electromagnetic field coupling to the notch 22 of the conductive member 14A.
  • a current i2 due to is induced. That is, in the portion where the coil conductor 34A and the conductive member 14A are close to each other, the current i2 in the direction to cancel the current i0 is generated in the notch 22 by the current i0.
  • the current density at the edge of the notch 22 of the conductive member 14A is high due to the edge effect.
  • the notch 22 faces S4 which is the outer edge of the conductive member 14A. Therefore, the current i2 induced in the notch 22 flows from the first side S4 due to the edge effect.
  • the coil conductor 34A is coupled to the conductive member 14A via an electric field, a magnetic field, or an electromagnetic field.
  • the single coil opening CH overlaps the two notches 21 and 22 in a plan view.
  • the conductive member 14A functions as a booster antenna for the coil conductor 34A.
  • the notches 21 and 22 are not limited to a structure that extends in the plan view from sides facing each other toward the inside of the conductive member. As shown in the antenna device 104A according to the present embodiment, if the conductive member functions as a booster antenna for the coil conductor, the plurality of cutout portions are seen from the sides that do not face each other in the plan view. It may be a structure that extends toward.
  • the antenna device 104A since the extending direction is not on the same straight line in any of the plurality of notches, the strength of the antenna device is extremely reduced with respect to one bending direction. Can be suppressed. Moreover, in this structure, since the extending
  • the antenna device 104B is a spiral conductor pattern in which the planar shape of the coil conductor 34B is L-shaped, and both ends thereof are connected to a first feeding circuit (not shown).
  • the length in the vertical direction (Y direction) of the coil opening CH of the coil conductor 34B adjacent to the first side S1 is equal to the length in the vertical direction (Y direction) of the notch 21. It is almost the same.
  • the length in the horizontal direction (X direction) of the coil opening CH of the coil conductor 34B adjacent to the fourth side S4 is substantially the same as the length in the horizontal direction (X direction) of the notch 22.
  • the coil opening CH of the coil conductor 34B close to the first side S1 is arranged so that the position in the vertical direction (Y direction) coincides with the cutout portion 21, and the coil opening of the coil conductor 34B close to the fourth side S4.
  • the CH is arranged so that the position in the horizontal direction (X direction) coincides with the notch 22. Therefore, the single coil opening CH of the antenna device 104B overlaps the two notches 21 and 22 in plan view (viewed from the Z direction).
  • the current density at the edge of the cutout portion 21 of the conductive member 14B is high due to the edge effect.
  • the notch 21 faces the first side S1, which is the outer edge of the conductive member 14B. Therefore, the current i1 induced in the notch 21 flows to the first side S1 due to the edge effect.
  • the currents i1 and i2 generated in the conductive member 14B are in-phase (in-phase) and are superimposed (added), so that a current i1 + current i2 is generated along the outer edge of the conductive member 14B.
  • the coil conductor 34B is coupled to the conductive member 14B via an electric field, a magnetic field, or an electromagnetic field.
  • the antenna device 104B has the same basic configuration as the antenna device 104A, and can exhibit the same operations and effects as the antenna device 104A. Note that the area occupied by the coil conductor 33B can be reduced by appropriately changing the shape of the coil conductor 34B in accordance with the location and shape of the notches 21 and 22 as in the present embodiment.
  • FIG. 9 is an external perspective view of the antenna device 105 according to the fifth embodiment.
  • the antenna device 105 is different from the antenna device 101 according to the first embodiment in that the conductive member 15 and the coil conductor 35 are bent in the thickness direction (Z direction). Other configurations are substantially the same as those of the antenna device 101 according to the first embodiment.
  • the antenna device 105 includes a conductive member 15 and a coil conductor 35 having a coil opening CH.
  • the conductive member 15 has both sides in the lateral direction (X direction) bent in the thickness direction (Z direction). That is, it can be said that the conductive member 15 is a flat plate bent in a U-shape (C-shape) when viewed from the vertical direction (Y direction).
  • the conductive member 15 has a first side S1 and a second side S2 at the outer edge bent in the thickness direction (Z direction).
  • the conductive member 15 has notches 21 and 22.
  • the notch 21 extends inwardly from the first side S1 that is the outer edge of the conductive member 15 (the ⁇ Z direction and the + X direction in FIG. 9).
  • the notch 22 extends inwardly from the second side S2 that is the outer edge of the conductive member 15 (the ⁇ Z direction and the ⁇ X direction in FIG. 9).
  • both of the cutout portions 21 and 22 of the antenna device 105 are arranged on the same straight line (on the X axis and the Z axis).
  • the coil conductor 35 is a spiral conductor pattern in which both sides in the lateral direction (X direction) are bent in the thickness direction (Z direction), like the conductive member 15. Both ends of the coil conductor 35 are directly connected to a first power feeding circuit (not shown).
  • the length of the coil opening CH in the vertical direction (Y direction) is substantially the same as the length of the notches 21 and 22 in the vertical direction (Y direction), and the coil conductor 35 has a coil opening CH.
  • the coil opening CH of the antenna device 105 overlaps the notches 21 and 22 when viewed from the X direction and the Z direction.
  • the antenna device 105 has the same basic configuration as the antenna device 101 according to the first embodiment, and thus can exhibit the same operations and effects as the antenna device 101.
  • the conductive member 15 that functions as a booster antenna for the coil conductor 35 has a structure in which both sides in the lateral direction (X direction) are bent in the thickness direction (Z direction).
  • the current induced in the conductive member 15 by the current flowing through the coil conductor 35 flows to the first side S1 and the second side S2, which are outer edges bent in the thickness direction (Z direction), by the edge effect. Therefore, with this configuration, an antenna device having directivity in the lateral direction (X direction) can be realized.
  • the degree of freedom in design of directivity can be increased by adjusting the angle and length of the portion of the conductive member 15 bent in the thickness direction (Z direction).
  • the conductive member 15 and the coil conductor 35 may have a three-dimensional structure (three-dimensional structure).
  • the shapes of the conductive member 15 and the coil conductor 35 can be changed as appropriate as long as the conductive member 15 functions as a booster antenna for the coil conductor 35. That is, as long as the conductive member 15 functions as a booster antenna for the coil conductor 35, the entire casing of the electronic device may be configured with the conductive member 15.
  • the cutout portion 21 extends in the ⁇ Z direction and the + X direction from the first side S1 that is the outer edge of the conductive member 15, and the cutout portion 22 is the second side that is the outer edge of the conductive member 15.
  • the notches 21 and 22 are formed so as to extend from S2 in the ⁇ Z direction and the ⁇ X direction, but the notches 21 and 22 may be extended only in the ⁇ Z direction, respectively. That is, the notches 21 and 22 may be provided only on the side portions of the conductive member 15 having a three-dimensional structure.
  • FIG. 10 is a bottom view of the electronic apparatus 201 according to the sixth embodiment.
  • the electronic device 201 includes, for example, a mobile phone terminal (including a smart phone or a feature phone), a wearable terminal (smart watch, smart glass, etc.), a notebook computer, a tablet PC, a PDA, a camera, a game machine, a toy, an RFID tag, etc.
  • An information medium such as a tag, an SD (registered trademark) (Secure Digital) card, a SIM card or an IC card.
  • the electronic apparatus 201 includes an antenna device 102A and radiating elements 51 and 52 of a standing wave antenna.
  • the conductive member 12 of the antenna device 102A and the radiating elements 51 and 52 of the standing wave antenna are, for example, a part of the lower housing of the smartphone.
  • the antenna device 102A and the radiating element 51 of the standing wave antenna are arranged side by side in the vertical direction (the ⁇ Y direction in FIG. 10) with the gap 42 interposed therebetween.
  • the antenna device 102A and the radiating element 52 of the standing wave antenna are arranged side by side in the vertical direction (+ Y direction) with the gap 42 interposed therebetween. That is, as shown in FIG. 10, the electronic device 201 has a longitudinal direction (in the order of the radiating element 51 of the standing wave antenna, the antenna device 102 ⁇ / b> A, and the radiating element 52 of the standing wave antenna, with the gap 42 interposed therebetween. (Y direction).
  • an insulator such as a resin member or a metal oxide is disposed in the gap portion 42 formed between the conductive member and the radiating elements 51 and 52 of the standing wave antenna.
  • the antenna device 102A is different from the antenna device 102 according to the second embodiment in that a camera hole 41 is provided. As shown in FIG. 10, a camera module 61 is disposed in the camera hole 41. Speakers 62 are disposed in the openings 23A and 23B of the conductive member 12 of the antenna device 102, respectively.
  • the coil conductor 31 is a spiral conductor pattern having a rectangular planar shape, and both ends thereof are directly connected to a first power supply circuit (not shown).
  • the coil conductor 31 is disposed on the other main surface of the conductive member 12 (the surface on the back side of the conductive member 11 in FIG. 10).
  • the first power supply circuit is a first frequency band (HF band) IC.
  • the radiating elements 51 and 52 of the standing wave antenna are radiating elements having a rectangular planar shape, and are conductive flat plates.
  • the radiating elements 51 and 52 of the standing wave antenna are directly connected to a second feeding circuit (not shown).
  • the second power feeding circuit is an IC for the second frequency band (UHF band or SHF band).
  • the radiating elements 51 and 52 of the standing wave antenna are connected to the conductive member 12 from a predetermined position (not shown).
  • the conductive member 12 is connected to the ground via the capacitor C1 (or directly). That is, it is grounded at a high frequency.
  • the capacitor C1 is a reactance element that has a low impedance in the second frequency band (UHF band or SHF band) and is equivalently short-circuited. Therefore, in the second frequency band (UHF band or SHF band), the conductive member 12 is grounded at a predetermined position.
  • the radiating elements 51 and 52 of the standing wave type antenna are long in the second frequency band (UHF band or SHF band) so that the open end has zero current intensity and the ground end has zero electric field intensity (so as to resonate). Etc. are determined. In this manner, in the second frequency band (UHF band or SHF band), the radiating elements 51 and 52 of the standing wave antenna function as standing wave inverted F antennas that contribute to electromagnetic wave radiation.
  • a radiating element of a standing wave antenna that generates a standing wave in the second frequency band (UHF band or SHF band) as well as an antenna apparatus that uses the first frequency band (HF band) as a working frequency. Therefore, an electronic device that can be used in a plurality of systems having different frequency bands can be realized.
  • the radiating element 51 of the standing wave antenna, the antenna device 102A, and the radiating element 52 of the standing wave antenna are arranged in the vertical direction (Y direction) in plan view.
  • Y direction vertical direction
  • the arrangement of the radiating element 51 of the standing wave antenna, the antenna device 102A, and the radiating element 52 of the standing wave antenna can be changed as appropriate.
  • the present invention is not limited to this configuration.
  • the shape, quantity, and the like of the radiating element of the standing wave antenna can be changed as appropriate.
  • the antenna device 102A has been described with respect to an example in which one hole 41 is provided, but is not limited to this configuration.
  • the shape, quantity, size, and the like of the hole 41 can be appropriately changed within a range where the conductive member 12 functions as a booster antenna for the coil conductor 31.
  • the present invention is not limited to this configuration.
  • an operation button, a microphone, an optical sensor, a fingerprint sensor, or the like can be disposed in the hole 41 and the openings 23A and 23B.
  • the “standing wave antenna” refers to an antenna that radiates an electromagnetic wave by resonating a radiating element and distributing a standing wave of voltage / current.
  • the standing wave antenna is an inverted F antenna.
  • a dipole antenna, a monopole antenna, a one-wavelength loop antenna, an inverted L antenna, a plate inverted F antenna (PIFA) The present invention can be similarly applied to other standing wave antennas such as patch antennas, slot antennas, notch antennas, and the like that generate a standing wave of current intensity and electric field intensity by resonating on a radiating element.
  • FIG. 11 is a front view of an electronic apparatus 202 according to the seventh embodiment.
  • 12A is a bottom view of the electronic device 202
  • FIG. 12B is a cross-sectional view taken along the line AA in FIG. 11, showing a structure inside the housing of the electronic device 202.
  • FIG. Although a resin member is used for a part of the housing of the electronic device 202, the resin member is not illustrated in FIGS. 11, 12A, and 12B.
  • the electronic device 202 includes an upper housing 91 and a lower housing 92.
  • the upper housing 91 is made of resin, and a display or the like is provided on the surface thereof.
  • the electronic apparatus 202 further includes radiation elements 51 and 52 of a standing wave antenna and an antenna device 105A.
  • the conductive member 15 of the antenna device 105 ⁇ / b> A and the radiating elements 51 and 52 of the standing wave antenna are a part of the lower housing 92 of the electronic device 202.
  • the lower housing 92 has a standing wave antenna radiating element 51, an antenna device 105A, and a standing wave antenna radiating element 52 in this order with the gap 42 interposed therebetween.
  • the structure is arranged in the direction (Y direction).
  • the radiating elements 51 and 52 of the standing wave antenna are flat plates in which both sides in the horizontal direction (X direction) are bent in the vertical direction (Y direction). As shown in FIG. 12A, it can be said that the radiating elements 51 and 52 of the standing wave antenna are flat plates bent into a U shape when viewed from the thickness direction (Z direction).
  • the antenna device 105A is different from the antenna device 105 according to the fifth embodiment in that the antenna device 105A includes the coil antenna 3.
  • the coil antenna 3 includes a base material 30, a coil conductor 31, and a magnetic material sheet (not shown).
  • the base material 30 is a rectangular flat plate made of an insulating material such as a flexible resin, and a coil conductor 31 is formed on one main surface (surface on the front side in FIG. 12B).
  • the coil conductor 31 is a spiral conductor pattern having a rectangular planar shape.
  • a magnetic sheet (not shown) is attached to the other main surface of the base material 30 (the back surface in FIG. 12B).
  • the substrate 30 is a resin sheet such as polyimide (PI) or liquid crystal polymer (LCP).
  • a camera module 61 Inside the upper housing 91, a camera module 61, a circuit board 93, a battery pack 63, and the like are housed. On the circuit board 93, the coil antenna 3, the first feeding circuit 81, the second feeding circuits 82A and 82B, the capacitors 71 and 73, the reactance elements 72A and 72B, the connection pins 74, and the like are mounted.
  • the first power supply circuit 81 is connected to both ends of the coil conductor 31, and the capacitor 71 is connected in parallel to the coil conductor 31.
  • An LC resonance circuit is constituted by the coil conductor 31, the capacitor 71, and the capacitance component of the first power feeding circuit 81 itself. With this configuration, the coil conductor 31 is coupled to the conductive member 15, and the conductive member 15 functions as a booster antenna for the coil conductor 31.
  • the first power feeding circuit is an IC for a first frequency band (HF band), for example, an RFIC element for NFC of 13.56 MHz.
  • the capacitor 71 is a chip capacitor for a resonance circuit, for example.
  • the second feeding circuit 82A is connected to the radiating element 51 of the standing wave type antenna via the reactance element 72A, and the second feeding circuit 82B is connected to the radiating element 52 of the standing wave type antenna via the reactance element 72B. Is done.
  • the second power feeding circuits 82A and 82B are ICs for the second frequency band (UHF band or SHF band). For example, a power feeding circuit for a 1.5 GHz band GPS communication system and a 2.4 GHz band wireless LAN communication system. This is a power supply circuit.
  • the reactance elements 72A and 72B are electronic components such as a chip capacitor.
  • the conductive member 15 is connected to the ground conductor formed on the circuit board 93 via the connection pin 74 and the capacitor 75. That is, it is grounded at a high frequency.
  • the connection pin 74 is, for example, a movable probe pin.
  • the capacitor 75 is a reactance element that has a low impedance in the second frequency band (UHF band or SHF band) and is equivalently short-circuited. Therefore, in the second frequency band (UHF band or SHF band), the conductive member 15 is grounded at a predetermined position.
  • a radiating element of a standing wave antenna that generates a standing wave in the second frequency band (UHF band or SHF band) as well as an antenna apparatus that uses the first frequency band (HF band) as a working frequency. Therefore, an electronic device that can be used in a plurality of systems having different frequency bands can be realized.
  • the coil antenna 3 of the antenna device 105A includes a magnetic material sheet. For this reason, a predetermined inductance can be obtained with a conductor pattern having a small number of turns due to the high magnetic permeability of the magnetic sheet. Moreover, the magnetic field coupling with the counterpart coil antenna can be enhanced by the magnetic flux collecting effect of the magnetic material sheet. Furthermore, the magnetic shield effect on the back surface side can be obtained by the configuration including the magnetic sheet.
  • the planar shape of the radiating elements 51 and 52 of the standing wave antenna is not limited to a rectangular flat plate.
  • the planar shapes of the radiating elements 51 and 52 of the standing wave antenna can be changed as appropriate, such as a square, a polygon, a circle, and an ellipse.
  • the radiating elements 51 and 52 of the standing wave antenna are not limited to flat plates, but may have a three-dimensional structure or the like.
  • planar shape of the electronic device 202 is a rectangle is shown, but the present invention is not limited to this configuration.
  • the shape of the electronic device can be appropriately changed within a range that satisfies the configuration in which the conductive member of the antenna device according to the present invention is part or all of the housing.
  • FIG. 13 is a plan view showing a structure inside the housing of the electronic device according to the eighth embodiment.
  • the lower housing is not shown for the sake of clarity.
  • the electronic apparatus according to the eighth embodiment shown in FIG. 13 includes an antenna device 104C, an upper housing 91A, a lower housing, and the like.
  • the electronic device according to the present embodiment is a smartphone, for example.
  • a circuit board 93A Inside the upper housing 91A, devices 61A, 61B, 62A, a circuit board 93A, a battery pack 63, and the like are housed.
  • a UHF band antenna 53, devices 61A, 61B, and 62A, a first power feeding circuit (not shown), and the like are mounted on the circuit board 93A.
  • a planar conductor 18 is formed inside the circuit board 93A.
  • the planar conductor 18 is a planar conductor whose planar shape is L-shaped, for example, a ground conductor formed on the circuit board 93A.
  • the notch 21A is disposed at one corner of the planar conductor 18 (the upper left corner of the planar conductor 18 in FIG. 13).
  • the notch 22A extends inward from the first side (the left side of the planar conductor 18 in FIG. 13) which is the outer edge of the planar conductor 18.
  • the cutout portion 23 ⁇ / b> A extends inward from the third side (the lower side of the planar conductor 18 in FIG. 13) that is the outer edge of the planar conductor 18.
  • planar conductor 18 corresponds to the “conductive member” and “functional component included in the electronic device” according to the present invention.
  • the devices 61A, 61B, and 62A are disposed in the notches 21A, 22A, and 23A formed in the planar conductor 18 as viewed from the Z direction.
  • the device 61A is, for example, a rear camera on the back side
  • the device 61B is, for example, a front camera on the display side of a smartphone
  • the device 62A is, for example, an earphone jack.
  • the UHF band antenna 53 is an antenna used for, for example, a cellular system, GPS (Global Positioning System), Wi-Fi (registered trademark) or Bluetooth (registered trademark).
  • the coil antenna 3A is affixed inside the lower casing (not shown).
  • the coil antenna 3A according to the present embodiment includes a base material 30A and a coil conductor 34C.
  • the coil conductor 34C is a spiral conductor pattern whose planar shape is L-shaped, like the coil conductor 34B described in the fourth embodiment, and is formed on the main surface of the base material 30A. Both end portions of the coil conductor 34C are connected to a first power supply circuit (not shown) via a movable probe pin or the like.
  • the lower housing and the base material 30A according to the present embodiment are provided with holes 43 at positions corresponding to the device 61A that is a rear camera.
  • the coil opening CH of the coil conductor 34C overlaps the three notches 21A, 22A, and 23A in plan view (viewed from the Z direction).
  • the coil conductor 34C and the planar conductor 18 constitute an antenna device 104C.
  • This configuration makes it possible to implement electronic devices that can be used in multiple systems with different frequency bands.
  • the present invention is not limited to this configuration.
  • the coil opening of the coil antenna may overlap three or more cutouts when viewed from the Z direction.
  • the planar shape of the conductive member is not limited to a rectangle, and the planar shape of the conductive member may be L-shaped as shown in the present embodiment.
  • the position of the notch is not limited to the position where the notch is arranged at the corner of the conductive member as shown in the present embodiment. The position of the notch can be appropriately changed within a range in which the conductive member functions as a booster antenna for the coil conductor.
  • a planar conductor (ground conductor) formed inside the circuit board 73 can be used as a conductive member. With this configuration, there is no need to separately provide a conductive member, and manufacturing is easy and cost can be reduced.
  • casing of an electronic device was shown, it is not limited to this.
  • the coil antenna may be affixed to the inside of the upper housing, or may be fixed to, for example, an inner cover between the circuit board and the housing.
  • FIG. 14 is a plan view showing the structure inside the housing of the electronic device according to the ninth embodiment.
  • the lower housing is not shown for the sake of clarity.
  • the electronic device according to the present embodiment is a smartphone, for example.
  • devices 61A, 61B, 62A, a circuit board 93B, a battery pack 63, and the like are housed inside the upper casing 91B.
  • a UHF band antenna 53, devices 61A, 61B, and 62A, a shield case 19, a first power feeding circuit (not shown), and the like are mounted on the circuit board 93B.
  • the shield case 19 is a conductor cover having a T-shaped planar shape, and has notches 21B and 22B.
  • the shield case 19 is a metallic cover that is mounted on, for example, a circuit board and covers an integrated circuit or the like.
  • the notch 21B is disposed at one corner of the shield case 19 (the upper left corner of the shield case 19 in FIG. 14).
  • the notch 22B is disposed at the other corner of the shield case 19 (the lower left corner of the shield case 19 in FIG. 14).
  • the shield case 19 corresponds to the “conductive member” and the “functional component included in the electronic device” according to the present invention.
  • the devices 61A and 61B are disposed in the notches 21B and 22B formed in the shield case 19 as viewed from the Z direction.
  • a coil antenna 3B is affixed inside the lower casing (not shown).
  • the coil antenna 3B according to the present embodiment includes a base material 30B and a coil conductor 31A.
  • the coil conductor 31A is a spiral conductor pattern having a rectangular planar shape, like the coil conductor 31 described in the first embodiment, and is formed on the main surface of the substrate 30B. Both end portions of the coil conductor 31A are connected to a first power supply circuit (not shown) via a movable probe pin or the like.
  • the lower housing and the base material 30B according to the present embodiment are provided with holes 43 at positions corresponding to the device 61A that is a rear camera.
  • the coil opening CH of the coil conductor 31A overlaps the two notches 21B and 22B in a plan view (viewed from the Z direction).
  • the coil conductor 31A and the shield case 19 constitute an antenna device 101A.
  • This configuration makes it possible to implement electronic devices that can be used in multiple systems with different frequency bands.
  • the present invention is not limited to this configuration.
  • a connector such as an earphone jack, a speaker, a mechanical switch, a button, a microphone, an optical sensor, a fingerprint sensor, or the like can be disposed in the cutout portion of the functional component.
  • the “functional component” in the present invention is a component that is included in at least an electronic device and has not only a function as an antenna device but also a function other than the antenna device.
  • the “functional component” in the present invention is not limited to the ground conductor and the shield case formed on the circuit board shown in the eighth and ninth embodiments.
  • the antenna device and the electronic device in the communication system mainly using magnetic field coupling such as NFC have been described.
  • the antenna device and the electronic device in the above-described embodiment are contactless using magnetic field coupling.
  • the power transmission system (electromagnetic induction method, magnetic field resonance method) can be used similarly.
  • the antenna device in the above-described embodiment is, for example, a power receiving antenna device of a power receiving device or a power transmitting device of a power transmitting device in a magnetic resonance type non-contact power transmission system used at a frequency of HF band (especially around 6.78 MHz or 6.78 MHz). It can be applied as an antenna device.
  • the antenna device is connected to a power supply circuit (power receiving circuit) that supplies power to a load (secondary battery or the like) provided in the power receiving device. Even in this case, the antenna device functions as a power receiving antenna device or a power transmitting antenna device. Both ends of the coil conductor of the antenna device are connected to a power reception circuit or a power transmission circuit that uses a used frequency band (HF band, particularly 6.78 MHz or around 6.78 MHz).
  • HF band particularly 6.78 MHz or around 6.78 MHz
  • C1 ... capacitor CH ... coil openings i0, i1, i2, i3 ... current S1 ... first side S2 ... second side S3 ... third side S4 ... fourth side 3, 3A, 3B ... coil antennas 11, 12, 13A, 13B, 14A, 14B, 15 ... conductive member 18 ... shield case (conductive member) 19 ... planar conductor (conductive member) 21, 21A, 21B, 22, 22A, 22B ... Notches 23A, 23B ... Openings 24A, 24B ... Slit 30 ... Base materials 31, 31A, 33A, 33B, 34A, 34B, 34C, 35 ... Coil conductor 41 , 43 ... Hole 42 ... Gap 51, 52 ...

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
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Abstract

L'invention concerne un appareil d'antenne (101) qui est pourvu d'un conducteur de bobine (31) présentant une ouverture de bobine (CH), et d'un élément électroconducteur (11) comportant des parties encoche (21, 22) qui s'étendent vers l'intérieur à partir d'un premier côté (S1) et d'un second côté (S2), qui sont des bords extérieurs. Les deux parties d'extrémité du conducteur de bobine (31) sont connectées à un circuit d'alimentation, et l'ouverture de bobine (CH) chevauche les parties encoche (21, 22). Dans cette configuration, le conducteur de bobine (31) est connecté aux parties encoche (21, 22) de l'élément électroconducteur (11), moyennant quoi l'élément électroconducteur (11) fait office d'antenne d'amplification pour le conducteur de bobine (31).
PCT/JP2016/058235 2015-03-24 2016-03-16 Appareil d'antenne et dispositif électronique WO2016152662A1 (fr)

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JP2015-061776 2015-03-24

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CN113873060A (zh) * 2017-08-22 2021-12-31 华为技术有限公司 可折叠移动设备

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JP2008131115A (ja) * 2006-11-17 2008-06-05 Tamura Seisakusho Co Ltd アンテナコイル及び通信機器
JP2012147408A (ja) * 2010-12-24 2012-08-02 Kyocera Corp 携帯電子機器
JP5655991B2 (ja) * 2012-12-21 2015-01-21 株式会社村田製作所 インタフェースユニット及びコンピュータ

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US20020190126A1 (en) * 2000-01-05 2002-12-19 David Benhammou Elecronic key reader
JP2008131115A (ja) * 2006-11-17 2008-06-05 Tamura Seisakusho Co Ltd アンテナコイル及び通信機器
JP2012147408A (ja) * 2010-12-24 2012-08-02 Kyocera Corp 携帯電子機器
JP5655991B2 (ja) * 2012-12-21 2015-01-21 株式会社村田製作所 インタフェースユニット及びコンピュータ

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CN113873060A (zh) * 2017-08-22 2021-12-31 华为技术有限公司 可折叠移动设备
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CN113873060B (zh) * 2017-08-22 2023-03-10 华为技术有限公司 可折叠移动设备

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