WO2016152662A1 - Antenna apparatus and electronic device - Google Patents

Antenna apparatus and electronic device 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
French (fr)
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/en
Publication of WO2016152662A1 publication Critical patent/WO2016152662A1/en

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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 ...

Abstract

An antenna apparatus (101) is provided with a coil conductor (31) having a coil aperture (CH), and an electroconductive member (11) having notch sections (21, 22) extending inward from a first side (S1) and a second side (S2), which are outer edges. Both end parts of the coil conductor (31) are connected to a feed circuit, and the coil aperture (CH) overlaps with the notch sections (21, 22). In this configuration, the coil conductor (31) is connected to the notch sections (21, 22) of the electroconductive member (11), whereby the electroconductive member (11) functions as a booster antenna for the coil conductor (31).

Description

アンテナ装置および電子機器ANTENNA DEVICE AND ELECTRONIC DEVICE
　本発明は、アンテナ装置に関し、特に例えばＲＦＩＤシステムや近距離無線通信システム等に用いられるアンテナ装置に関する。また、本発明は、電子機器に関し、特に例えばＲＦＩＤシステムや近距離無線通信システム等に用いられる電子機器に関する。 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.
　近年、携帯電話端末やタブレットＰＣ等の携帯端末機器同士、または携帯端末機器とリーダ／ライタとでＮＦＣ（近距離無線通信システム）等の通信を行うために、各々の機器に通信用のコイルアンテナが搭載されているものが実用化されている。 In recent years, in order to perform communication such as NFC (Near Field Communication System) between portable terminal devices such as a mobile phone terminal and a tablet PC, or between a portable terminal device and a reader / writer, a coil antenna for communication is used for each device. Those equipped with are in practical use.
　また、最近の携帯端末機器は薄型化が進められ、薄型化による強度不足に対応するために樹脂筐体にマグネシウムメッキ加工を施したり、アルミニウムボディ等の金属筐体を用いたりして、筐体の「金属化」によって強度を補う場合が増えてきている。 In addition, recent mobile terminal devices have been made thinner, and in order to cope with the lack of strength due to the thinning, the resin casing is subjected to magnesium plating processing, or a metal casing such as an aluminum body is used. There is an increasing number of cases where the strength is supplemented by the “metallization” of.
　しかし、金属筺体を用いた電子機器では、内蔵されたアンテナコイルが金属によって遮蔽されるため、通信相手との通信ができなくなる、あるいは、通信距離が著しく劣化する、という問題が生じる。 However, in an electronic device using a metal housing, a built-in antenna coil is shielded by metal, so that there is a problem that communication with a communication partner cannot be performed or the communication distance is significantly deteriorated.
　そこで、例えば特許文献１に開示されているような、金属部材とコイルアンテナとを備えるアンテナ装置が知られており、電子機器の金属筐体を上記金属部材として利用することにより、筐体の強度を補う方法が考えられる。上記アンテナ装置では、開口部および開口部と外縁部とを連結する複数のスリットを有する金属部材がコイルアンテナと結合して、コイルアンテナに対するブースターアンテナとして作用するため、通信可能距離を高めることができる。 Therefore, for example, 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. In the above antenna device, 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. .
　また、上記アンテナ装置では金属部材がコイルアンテナと結合して、金属部材の開口部の周縁に電流が流れると、その電流が複数のスリットに沿って流れ、さらに金属部材の周縁に沿って流れる。そのため、複数のスリットの形成領域の電流強度が相対的に大きくなり、スリットの形成方向への磁界強度を高めることができる。したがって、上記構成により、指向性の設計上の自由度を高めることもできる。 In 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.
特開２０１３－１６２１９５号公報JP 2013-162195 A
　しかし、特許文献１に示される構成では、複数のスリットによって金属部材が複数に分割されるため、アンテナ装置および筐体の強度が低下する。また、複数のスリットによって金属部材が複数に分割されることで、複数の金属部材に電位差が生じることがあり、各種の使用周波数帯において予期せぬ電磁波の放射やノイズ等が発生し易くなる。 However, in the configuration shown in 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.
　本発明の目的は、導電性部材を備える構成において、アンテナ装置の強度の低下を抑制し、かつ特性の良いアンテナ装置、およびそのアンテナ装置を備える電子機器を提供することにある。 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.
（１）本発明のアンテナ装置は、
　コイル開口を有するコイル導体と、
　外縁から内側に向かって延伸する複数の切り欠き部を有する導電性部材と、
　を備え、
　前記コイル開口は、前記複数の切り欠き部に重なる。 (1) 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.
　この構成では、コイル導体が導電性部材の切り欠き部と電界結合、磁界結合もしくは電磁界結合するため、導電性部材はコイル導体に対するブースターアンテナとして機能する。そのため、コイル導体のみの場合と比べ、アンテナとして機能する実質的なコイル開口が大きくなり、磁束を放射（集磁）する範囲および距離が大きくなることで、相手側のアンテナコイルと結合し易くなる。 In this configuration, 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. .
　また、導電性部材が複数に分割されないため、アンテナ装置および筐体の強度の低下が抑制できる。さらに、この構成では、導電性部材が複数に分割されていないため、各種の使用周波数帯における予期せぬ電磁波の放射やノイズ等の発生が抑制できる。 Further, since 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.
　したがって、アンテナ装置の強度の低下を抑制し、かつ特性の良いアンテナ装置を実現できる。 Therefore, it is possible to realize an antenna device having a good characteristic while suppressing a decrease in strength of the antenna device.
（２）前記切り欠き部は、前記導電性部材の内側に形成される開口部と、前記導電性部材の前記外縁から前記開口部に向かって延伸するスリット部とを有することが好ましい。導電性部材の外縁から開口部に向かって延伸するスリット部は、切り欠き部の延伸方向と直交する方向の幅が、開口部に比べて相対的に小さい。そのため、この構成により、コイル導体が導電性部材の外縁と近接する領域が広くなり、コイル導体と導電性部材との結合度が高まる。ブースターアンテナとコイル導体との結合度は、ブースターアンテナを介して給電回路（後述の第１給電回路）が受け取ることのできる電磁エネルギーの量に関わるため、この構成により、結果的に特性を良いアンテナ装置を実現できる。 (2) It is preferable that 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.
（３）上記（１）または（２）において、前記導電性部材は、前記外縁に複数の辺を有し、前記複数の切り欠き部は、異なる前記辺から内側に向かって延伸する構造とすることができる。 (3) In the above (1) or (2), 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.
（４）上記（３）において、前記複数の切り欠き部は、平面視で、互いに対向する辺から内側に向かって延伸する構造とすることができる。 (4) In the above (3), the plurality of cutout portions may have a structure extending inward from opposite sides in plan view.
（５）上記（１）から（４）のいずれかにおいて、前記複数の切り欠き部のいずれも、延伸方向が同一直線上にないことが好ましい。この構成では、複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、アンテナ装置の強度が一つの曲げ方向に対して、極端に低下することを抑制できる。また、この構成においては、磁束が強く放射される複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、磁束が強く放射される領域が大きい。したがって、相手側のアンテナと強く結合する領域の大きいアンテナ装置を実現することができる。 (5) In any one of the above (1) to (4), it is preferable that none of the plurality of cutout portions has a stretching direction on the same straight line. In this configuration, since 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. Moreover, in this structure, since the extending | stretching direction is not on the same straight line, the area | region where a magnetic flux is radiated | emitted strongly is large in all of the some notch parts to which a magnetic flux radiates | emits strongly. Therefore, it is possible to realize an antenna device having a large area that is strongly coupled to the antenna on the other side.
（６）本発明の電子機器は、
　アンテナ装置と、
　第１周波数帯を使用周波数とする第１給電回路と、
　を備え、
　前記アンテナ装置は、
　　コイル開口を有するコイル導体と、
　　外縁から内側に向かって延伸する複数の切り欠き部を有する導電性部材と、
　　を有し、
　　前記コイル開口は、前記複数の切り欠き部に重なり、
　前記第１給電回路は、前記コイル導体に接続される、または、前記コイル導体と電界結合、磁界結合もしくは電磁界結合することを特徴とする。 (6) 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.
　この構成により、第１周波数帯（ＨＦ帯）を使用したシステムに用いられるアンテナ装置を備える電子機器を実現できる。 With this configuration, it is possible to realize an electronic device including an antenna device used in a system using the first frequency band (HF band).
（７）上記（６）において、前記第１周波数帯よりも高い第２周波数帯で、定在波が生じる定在波型アンテナの放射素子をさらに備えることが好ましい。この構成では、第１周波数帯（ＨＦ帯）を使用周波数とするアンテナ装置だけでなく、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）で定在波を生じる定在波型アンテナの放射素子をさらに備えるため、周波数帯の異なる複数のシステムで利用できる電子機器を実現できる。 (7) In the above (6), it is preferable to further include 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. In this configuration, not only an antenna device using the first frequency band (HF band) as a use frequency but also a radiating element of a standing wave antenna that generates a standing wave in the second frequency band (UHF band or SHF band) is further provided. Therefore, an electronic device that can be used in a plurality of systems having different frequency bands can be realized.
（８）上記（６）または（７）において、前記導電性部材は、前記電子機器の筐体の一部または全部であることが好ましい。この構成により、導電性部材を別途設ける必要がなく、製造が容易で低コスト化できる。 (8) In said (6) or (7), it is preferable that the said electroconductive member is a part or all of the housing | casing of the said electronic device. With this configuration, there is no need to separately provide a conductive member, and manufacturing is easy and cost can be reduced.
（９）上記（６）または（７）において、前記導電性部材は、前記電子機器が備える機能部品であることが好ましい。この構成により、導電性部材を別途設ける必要がなく、製造が容易で低コスト化できる。 (9) In the above (6) or (7), 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.
（１０）上記（９）において、回路基板をさらに備え、前記機能部品は、前記回路基板に形成される面状導体であってもよい。 (10) In the above (9), a circuit board may be further provided, and the functional component may be a planar conductor formed on the circuit board.
（１１）上記（９）において、前記機能部品はシールドケースであってもよい。 (11) In the above (9), the functional component may be a shield case.
　本発明によれば、導電性部材を備える構成において、アンテナ装置の強度の低下を抑制し、かつ特性の良いアンテナ装置、およびそのアンテナ装置を備える電子機器を実現できる。 According to the present invention, in a configuration including a conductive member, 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.
図１は第１の実施形態に係るアンテナ装置１０１の外観斜視図である。FIG. 1 is an external perspective view of an antenna device 101 according to the first embodiment. 図２はアンテナ装置１０１の平面図である。FIG. 2 is a plan view of the antenna device 101. 図３は、コイル導体３１に流れる電流と導電性部材１１に生じる電流との関係を示す、アンテナ装置１０１の平面図である。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. 図４は第２の実施形態に係るアンテナ装置１０２の平面図である。FIG. 4 is a plan view of the antenna device 102 according to the second embodiment. 図５（Ａ）は第３の実施形態に係るアンテナ装置１０３Ａの平面図であり、図５（Ｂ）は、コイル導体３３Ａに流れる電流と導電性部材１３Ａに生じる電流との関係を示す、アンテナ装置１０３Ａの平面図である。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. 図６（Ａ）は第３の実施形態に係るアンテナ装置１０３Ｂの平面図であり、図６（Ｂ）は、コイル導体３３Ｂに流れる電流と導電性部材１３Ｂに生じる電流との関係を示す、アンテナ装置１０３Ｂの平面図である。FIG. 6A is a plan view of the antenna device 103B according to the third embodiment, and 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. 図７（Ａ）は第４の実施形態に係るアンテナ装置１０４Ａの平面図であり、図７（Ｂ）は、コイル導体３４Ａに流れる電流と導電性部材１４Ａに生じる電流との関係を示す、アンテナ装置１０４Ａの平面図である。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. 図８（Ａ）は第４の実施形態に係るアンテナ装置１０４Ｂの平面図であり、図８（Ｂ）は、コイル導体３４Ｂに流れる電流と導電性部材１４Ｂに生じる電流との関係を示す、アンテナ装置１０４Ｂの平面図である。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. 図９は第５の実施形態に係るアンテナ装置１０５の外観斜視図である。FIG. 9 is an external perspective view of the antenna device 105 according to the fifth embodiment. 図１０は第６の実施形態に係る電子機器２０１の下面図である。FIG. 10 is a bottom view of the electronic apparatus 201 according to the sixth embodiment. 図１１は第７の実施形態に係る電子機器２０２の正面図である。FIG. 11 is a front view of an electronic apparatus 202 according to the seventh embodiment. 図１２（Ａ）は電子機器２０２の下面図であり、図１２（Ｂ）は図１１におけるＡ－Ａ断面図であり、電子機器２０２の筐体内部の構造を示す図である。12A is a bottom view of the electronic device 202, and 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. 図１３は、第８の実施形態に係る電子機器の筐体内部の構造を示す平面図である。FIG. 13 is a plan view showing a structure inside the housing of the electronic device according to the eighth embodiment. 図１４は、第９の実施形態に係る電子機器の筐体内部の構造を示す平面図である。FIG. 14 is a plan view showing the structure inside the housing of the electronic device according to the ninth embodiment.
　以降、図を参照していくつかの具体的な例を挙げて、本発明を実施するための複数の形態を示す。各図中には同一箇所に同一符号を付している。各実施形態は例示であり、異なる実施形態で示した構成の部分的な置換または組み合わせが可能である。 Hereinafter, a plurality of embodiments for carrying out the present invention will be described by giving some specific examples with reference to the drawings. In each figure, the same reference numerals are assigned to the same portions. Each embodiment is an exemplification, and a partial replacement or combination of the configurations shown in different embodiments is possible.
　以降で示す各実施形態において、「アンテナ装置」とは、磁束を放射するアンテナである。アンテナ装置は、通信相手側のアンテナと磁界結合を用いた近傍界通信のために用いられるアンテナであり、例えばＮＦＣ（Ｎｅａｒ　ｆｉｅｌｄ　ｃｏｍｍｕｎｉｃａｔｉｏｎ）等の通信に利用される。アンテナ装置は、使用する周波数帯が例えばＨＦ帯であり、特に１３．５６ＭＨｚまたは１３．５６ＭＨｚ近傍の周波数で用いられる。アンテナ装置の大きさは使用する周波数における波長λに比べて非常に小さく、使用周波数帯での電磁波の放射特性は悪い。アンテナ装置は、アンテナ装置が備えるコイル導体を引き延ばした長さでλ／１０以下である。なお、ここでいう波長とは、アンテナが形成される基材の誘電性や透磁性による波長短縮効果を考慮した実効的な波長のことを指す。コイル導体の両端は、使用周波数帯（ＨＦ帯、特に１３．５６ＭＨｚまたは１３．５６ＭＨｚ近傍）を利用する給電回路に接続される。 In the following embodiments, 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 λ 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 λ / 10 or less. In addition, 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).
　《第１の実施形態》
　図１は第１の実施形態に係るアンテナ装置１０１の外観斜視図である。図２はアンテナ装置１０１の平面図である。図１および図２では、図および原理を分かりやすくするために、アンテナ装置１０１の構造を簡略化して図示している。以降の各実施形態における外観斜視図および平面図についても同様である。 << First Embodiment >>
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. In FIG. 1 and FIG. 2, 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.
　アンテナ装置１０１は、導電性部材１１と、コイル開口ＣＨを有するコイル導体３１とを備える。 The antenna device 101 includes a conductive member 11 and a coil conductor 31 having a coil opening CH.
　導電性部材１１は、導電性を有し、平面形状が矩形の平板である。本実施形態では、導電性部材１１の短手方向が横方向（図２におけるＸ方向）と一致し、長手方向が縦方向（Ｙ方向）に一致する。導電性部材１１は、横方向（図２におけるＸ方向）に位置する外縁に第１辺Ｓ１および第２辺Ｓ２を有する。第１辺Ｓ１および第２辺Ｓ２は、図２に示すように、平面視で（導電性部材１１をＺ方向から視て）、互いに対向する辺である。 The conductive member 11 is a flat plate having conductivity and a rectangular planar shape. In the present embodiment, the lateral direction of the conductive member 11 coincides with the lateral direction (X direction in FIG. 2), and 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). As shown 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).
　また、導電性部材１１は、切り欠き部２１，２２を有する。切り欠き部２１は、導電性部材１１の外縁である第１辺Ｓ１から内側に向かって（図２における＋Ｘ方向）延伸している。切り欠き部２２は、導電性部材１１の外縁である第２辺Ｓ２から内側に向かって（図２における－Ｘ方向）延伸している。アンテナ装置１０１の切り欠き部２１，２２のいずれも、図２に示すように、同一直線上（Ｘ軸上）に配置されている。本実施形態に係る導電性部材１１は、電子機器の筐体の一部を構成する。 Further, 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. As shown in FIG. 2, 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.
　コイル導体３１は、平面形状が矩形であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に直接接続される。本実施形態におけるコイル導体３１は、導電性部材１１の一方主面（図２における導電性部材１１の表側の面）に配置される。コイル導体３１は例えばパターンニングされたＣｕ箔であり、ポリイミド（ＰＩ）や液晶ポリマー（ＬＣＰ）等の樹脂製シートの主面に形成される。第１給電回路は第１周波数帯（ＨＦ帯）用ＩＣである。 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.
　図２に示すように、コイル開口ＣＨの縦方向（Ｙ方向）の長さは、切り欠き部２１，２２の縦方向（Ｙ方向）の長さと略同じであり、コイル導体３１はコイル開口ＣＨの縦方向（Ｙ方向）の位置が切り欠き部２１，２２に一致するように配置されている。すなわち、アンテナ装置１０１の単一のコイル開口ＣＨは、平面視で（Ｚ方向から視て）、切り欠き部２１，２２のいずれにも重なり、コイル開口ＣＨが切り欠き部２１，２２を跨ぐように形成されている。 As shown in FIG. 2, 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. Are arranged so that their positions in the vertical direction (Y direction) coincide with the notches 21 and 22. That is, 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.
　図３は、コイル導体３１に流れる電流と導電性部材１１に生じる電流との関係を示す、アンテナ装置１０１の平面図である。 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.
　コイル導体３１に一方方向（図３における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１１の切り欠き部２１に電界結合、磁界結合もしくは電磁界結合による電流ｉ１が誘起される。すなわち、コイル導体３１と導電性部材１１とが近接する部分で、電流ｉ０によって切り欠き部２１に、電流ｉ０を打ち消す方向（図３における時計回り）の電流ｉ１が生じる。このとき、縁端効果により導電性部材１１の切り欠き部２１の縁端の電流密度が高い。切り欠き部２１は導電性部材１１の外縁である第１辺Ｓ１に面している。そのため、切り欠き部２１に誘起された電流ｉ１は、縁端効果により第１辺Ｓ１に流れる。 When a current i0 in one direction (counterclockwise in FIG. 3) flows through the coil conductor 31, a current i1 is induced in the cutout portion 21 of the conductive member 11 by the current i0 due to electric field coupling, magnetic field coupling, or electromagnetic field coupling. The That is, in the portion where the coil conductor 31 and the conductive member 11 are close to each other, a current i1 in a direction (clockwise in FIG. 3) that cancels the current i0 is generated in the cutout portion 21 by the current i0. At this time, the current density at the edge of the cutout portion 21 of the conductive member 11 is high due to the edge effect. The notch 21 faces the first side S <b> 1 that is the outer edge of the conductive member 11. Therefore, the current i1 induced in the notch 21 flows to the first side S1 due to the edge effect.
　同様に、コイル導体３１に一方方向（図３における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１１の切り欠き部２２に電界結合、磁界結合もしくは電磁界結合による電流ｉ２が誘起される。すなわち、コイル導体３１と導電性部材１１とが近接する部分で、電流ｉ０によって切り欠き部２２に、電流ｉ０を打ち消す方向（図３における時計回り）の電流ｉ２が生じる。このとき、縁端効果により導電性部材１１の切り欠き部２２の縁端の電流密度が高い。切り欠き部２２は導電性部材１１の外縁である第２辺Ｓ２に面している。そのため、切り欠き部２２に誘起された電流ｉ２は、縁端効果により第２辺Ｓ２に流れる。 Similarly, when a current i0 in one direction (counterclockwise in FIG. 3) flows through the coil conductor 31, a current i2 caused by electric field coupling, magnetic field coupling, or electromagnetic field coupling in the notch 22 of the conductive member 11 by the current i0. Is induced. That is, in the portion where the coil conductor 31 and the conductive member 11 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. 3). At this time, the current density at the edge of the notch 22 of the conductive member 11 is high due to the edge effect. The notch 22 faces the second side S <b> 2 that is the outer edge of the conductive member 11. Therefore, the current i2 induced in the notch 22 flows to the second side S2 due to the edge effect.
　導電性部材１１に生じる電流ｉ１，ｉ２は同相（同位相）であり、両者は重畳（加算）されるため、導電性部材１１の外縁に沿って電流ｉ１＋電流ｉ２が生じる。このように、コイル導体３１は、導電性部材１１と電界、磁界もしくは電磁界を介して結合する。 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. Thus, the coil conductor 31 is coupled to the conductive member 11 via an electric field, a magnetic field, or an electromagnetic field.
　そして、導電性部材１１は、コイル導体３１に対するブースターアンテナとして機能する。上記ブースターアンテナを備えることにより、コイル導体３１のみの場合と比べ、アンテナとして機能する実質的なコイル開口が大きくなる。そのため、磁束を放射（集磁）する範囲および距離が大きくなることで、相手側のアンテナコイルと結合し易くなる。 The conductive member 11 functions as a booster antenna for the coil conductor 31. By providing the booster antenna, 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 | bond with the antenna coil of the other party because the range and distance which radiate | emit magnetic flux (magnetization) become large.
　なお、上述の例では、アンテナ装置１０１が送信側アンテナである場合についての作用を説明したが、アンテナの可逆定理により、送受が反転しても成り立つ。すなわち、アンテナ装置１０１が受信側アンテナである場合にも同様に作用する。以降の各実施形態において、コイル導体に流れる電流と導電性部材に生じる電流との関係を示すアンテナ装置の平面図についても同様である。 In the above-described example, 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 same applies to the plan view of the antenna device showing the relationship between the current flowing in the coil conductor and the current generated in the conductive member in each of the following embodiments.
　また、本実施形態に係るアンテナ装置１０１では、導電性部材１１が複数に分割されないため、アンテナ装置および筐体の強度の低下が抑制できる。さらに、この構成では、導電性部材１１が複数に分割されていないため、各種の使用周波数帯における予期せぬ電磁波の放射やノイズ等の発生が抑制できる。 Moreover, in the antenna device 101 according to the present embodiment, since 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.
　このように、アンテナ装置の強度の低下を抑制し、かつ特性の良いアンテナ装置を実現できる。 As described above, it is possible to realize an antenna device having excellent characteristics while suppressing a decrease in strength of the antenna device.
　なお、本実施形態では、導電性部材１１の短手方向（Ｘ方向）に位置する二辺（第１辺Ｓ１および第２辺Ｓ２）に切り欠き部２１，２２を有する例を示したが、この構成に限定されるものではない。導電性部材１１がコイル導体３１に対するブースターアンテナとして機能するのであれば、切り欠き部は導電性部材１１の長手方向に位置する二辺に有する構成であってもよい。 In the present embodiment, an example in which 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 has been described. 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.
　また、本実施形態では、導電性部材１１の平面形状が矩形である例を示したが、この構成に限定されるものではない。導電性部材１１の平面形状は正方形、多角形、円形、楕円形等、コイル導体３１に対するブースターアンテナとして機能する範囲において適宜変更可能である。 In the present embodiment, an example in which the 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.
　さらに、本実施形態では、導電性部材１１が平板である例を示したが、この構成に限定されるものではない。導電性部材１１の高さ方向（Ｚ方向）の厚みについても、上記の作用・効果を奏する範囲において適宜変更可能である。また、導電性部材１１は、後に詳述するように、コイル導体３１に対するブースターアンテナとして機能する範囲において立体的構造（３次元構造）であってもよい。また、後に詳述するように、導電性部材１１で電子機器の筐体全体を構成してもよい。 Furthermore, in the present embodiment, the example in which the conductive member 11 is a flat plate is shown, but the present invention is not limited to this configuration. 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. In addition, 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.
　なお、本実施形態では、コイル導体３１の平面形状が矩形であるスパイラル形状の導体パターンの例を示したが、この構成に限定されるものではない。コイル導体３１の平面形状は、後に詳述するように、コイル開口ＣＨが、平面視で（Ｚ方向から視て）、２つ以上の切り欠き部２１，２２に重なる構成を満たす範囲において適宜変更可能である。コイル導体３１の平面形状は、例えば多角形、円形、楕円形等が考えられる。 In the present embodiment, an example of a spiral conductor pattern in which the planar shape of the coil conductor 31 is a rectangle is shown, but the present invention is not limited to this configuration. As will be described in detail later, 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). Is possible. The planar shape of the coil conductor 31 may be a polygon, a circle, an ellipse, or the like, for example.
　また、本実施形態では、コイル導体３１がスパイラル形状の導体パターンである例を示したが、この構成に限定されるものではない。コイル導体３１の構造については、適宜変更可能であり、例えばヘリカル状のコイルであってもよい。 In the present embodiment, the coil conductor 31 is a spiral conductor pattern. However, the present invention is not limited to this configuration. About the structure of the coil conductor 31, it can change suitably, For example, a helical coil may be sufficient.
　本実施形態では、コイル導体３１が導電性部材１１の一方主面（図２における導電性部材１１の表側の面）に配置される例を示したが、この構成に限定されるものではない。コイル導体３１は、導電性部材１１の他方主面（図２における導電性部材１１の裏側の面）に配置される構成でもよい。 In the present embodiment, an example is shown in which 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).
　また、本実施形態では、コイル導体３１のコイル開口ＣＨの縦方向（Ｙ方向）の長さが切り欠き部２１，２２の縦方向（Ｙ方向）の長さと略同じであり、コイル導体３１はコイル開口ＣＨの縦方向（Ｙ方向）の位置が切り欠き部２１，２２に一致するように配置される例を示したが、この構成に限定されるものではない。切り欠き部２１の少なくとも一部および切り欠き部２２の少なくとも一部がコイル開口ＣＨと重なる限り、コイル導体３１と導電性部材１１とが結合することができる。したがって、本実施形態と比べて、コイル導体３１が縦方向（Ｙ方向）または横方向（Ｘ方向）にずれて形成されていてもよい。また、コイル開口ＣＨの縦方向の長さは、切り欠き部２１，２２の縦方向（Ｙ方向）の長さよりも短く形成されていてもよいし、長く形成されていてもよい。 In the present embodiment, 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). Although the example arrange | 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. As long as at least a part of the notch 21 and at least a part of the notch 22 overlap with the coil opening CH, 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).
　本実施形態では、コイル導体３１が第１給電回路に直接接続される例を示したが、この構成に限定されるものではない。第１給電回路は、コイル導体３１に対して、電界、磁界もしくは電磁界を介して結合する構成でもよい。 In the present embodiment, the example in which the coil conductor 31 is directly connected to the first power feeding circuit is shown, but the present invention is not limited to this configuration. 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.
　なお、本実施形態では、切り欠き部２１，２２の平面形状が矩形である例を示したが、この構成に限定されるものではない。例えば、切り欠き部２１，２２が屈曲部を有していてもよい。また、本実施形態では切り欠き部を二つ形成した例を示したが、切り欠き部は三つ以上形成してもよい。三つ以上の切り欠き部を形成した場合に、少なくとも二つの切り欠き部にコイル開口ＣＨが重なるように配置されていればよく、全ての切り欠き部にコイル開口ＣＨが重なっていなくてもよい。切り欠き部の形状、数量、大きさ等は、導電性部材１１がコイル導体３１に対するブースターアンテナとして機能する範囲において適宜変更可能であり、切り欠き部２１，２２の形状、大きさが互いに異なっていてもよい。 In the present embodiment, an example in which the planar shape of the notches 21 and 22 is a rectangle is shown, but the present invention is not limited to this configuration. For example, the notches 21 and 22 may have bent portions. Moreover, although the example which formed two notch parts was shown in this embodiment, you may form three or more notch parts. When three or more cutout portions are formed, it is only necessary that the coil openings CH overlap with at least two cutout portions, and the coil openings CH do not have to overlap all the cutout 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.
　本実施形態では、互いに対向する辺から内側に向かって延伸する切り欠き部２１，２２を有する例について示したが、この構成に限定されるものではない。複数の切り欠き部は、後に詳述するように、互いに対向しない辺から内側に向かって延伸する構造であってもよい。 In the present embodiment, an example in which 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. As will be described in detail later, the plurality of notches may have a structure extending inwardly from sides that do not face each other.
　また、アンテナ装置１０１では、切り欠き部２１，２２の延伸方向が同一（図２におけるＸ方向）である例を示したが、この構成に限定されるものではない。後に詳述するように、複数の切り欠き部の延伸方向が異なる構成であってもよい。 Further, in the antenna device 101, the example in which the extending directions of the notches 21 and 22 are the same (the X direction in FIG. 2) is shown, but the present invention is not limited to this configuration. As described in detail later, the plurality of notch portions may have different extending directions.
　《第２の実施形態》
　図４は第２の実施形態に係るアンテナ装置１０２の平面図である。図４では、図および原理を分かりやすくするために、アンテナ装置１０２の構造を簡略化して図示している。 << Second Embodiment >>
FIG. 4 is a plan view of the antenna device 102 according to the second embodiment. In FIG. 4, the structure of the antenna device 102 is simplified for easy understanding of the drawing and the principle.
　第２の実施形態に係るアンテナ装置１０２は、切り欠き部２１，２２の形状が第１の実施形態に係るアンテナ装置１０１と異なる。つまり、アンテナ装置１０２は、導電性部材１２の構成がアンテナ装置１０１と異なる。その他の構成は、第１の実施形態に係るアンテナ装置１０１と同じである。 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.
　以下、第１の実施形態に係るアンテナ装置１０１と異なる部分について説明する。 Hereinafter, parts different from the antenna device 101 according to the first embodiment will be described.
　本実施形態における切り欠き部２１は、開口部２３Ａとスリット部２４Ａとを有する。開口部２３Ａは導電性部材１２の内側に形成され、スリット部２４Ａは、導電性部材１２の第１辺Ｓ１から開口部２３Ａに向かって延伸している。スリット部２４Ａは、図４に示すように、切り欠き部２１の延伸方向と直交する方向（Ｙ方向）の幅が、開口部２３Ａに比べて相対的に小さい。 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. As shown in FIG. 4, 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.
　本実施形態における切り欠き部２２は、開口部２３Ｂとスリット部２４Ｂとを有する。開口部２３Ｂは導電性部材１２の内側に形成され、スリット部２４Ｂは、導電性部材１２の第２辺Ｓ２から開口部２３Ｂに向かって延伸している。スリット部２４Ｂは、図４に示すように、切り欠き部２２の延伸方向と直交する方向（Ｙ方向）の幅が、開口部２３Ｂに比べて相対的に小さい。 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. As shown in FIG. 4, 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.
　このような構成であっても、単一のコイル開口ＣＨは、平面視で、２つの切り欠き部２１，２２に重なる。したがって、アンテナ装置１０２は第１の実施形態に係るアンテナ装置１０１と基本的な構成は同じであり、アンテナ装置１０１と同様の作用・効果を奏することができる。 Even in such a configuration, the single coil opening CH overlaps the two notches 21 and 22 in a plan view. Therefore, 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.
　また、導電性部材１２の外縁から開口部２３Ａ，２３Ｂに向かって延伸するスリット部２４Ａ，２４Ｂは、切り欠き部２１，２２の延伸方向と直交する方向（Ｙ方向）の幅が、開口部に比べて相対的に小さい。そのため、コイル導体３１が導電性部材１２の外縁である第１辺Ｓ１および第２辺Ｓ２と近接する領域が広くなり、コイル導体３１と導電性部材１２との結合度が高まる。ブースターアンテナとコイル導体３１との結合度は、ブースターアンテナを介して第１給電回路が受け取ることのできる電磁エネルギーの量に関わるため、この構成により、結果的に特性を良いアンテナ装置を実現できる。 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.
　なお、本実施形態では、スリット部２４Ａ，２４Ｂの延伸方向が、切り欠き部２１，２２の延伸方向と同一（図４におけるＸ方向）である例を示したが、この構成に限定されるものではない。スリット部２４Ａ，２４Ｂの延伸方向および形状は、導電性部材１２がコイル導体３１に対するブースターアンテナとして機能する範囲において適宜変更可能である。 In the present embodiment, the example in which 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.
　また、本実施形態では、開口部２３Ａ，２３Ｂの平面形状が矩形である例を示したが、この構成に限定されるものではない。開口部２３Ａ，２３Ｂの平面形状は、平面視で（Ｚ方向から視て）、円形・楕円形・多角形等、適宜変更可能である。 In the present embodiment, an example in which the 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.
　さらに、本実施形態では、切り欠き部２１，２２の両方が開口部２３Ａ，２３Ｂおよびスリット部２４Ａ，２４Ｂからなる構成としたが、切り欠き部２１，２２のいずれか一方が開口部とスリット部からなり、他方が第１の実施形態と同様の切り欠き部である構成とすることも可能である。 Further, in the present embodiment, 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.
　《第３の実施形態》
　図５（Ａ）は第３の実施形態に係るアンテナ装置１０３Ａの平面図であり、図５（Ｂ）は、コイル導体３３Ａに流れる電流と導電性部材１３Ａに生じる電流との関係を示す、アンテナ装置１０３Ａの平面図である。 << Third 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.
　図６（Ａ）は第３の実施形態に係るアンテナ装置１０３Ｂの平面図であり、図６（Ｂ）は、コイル導体３３Ｂに流れる電流と導電性部材１３Ｂに生じる電流との関係を示す、アンテナ装置１０３Ｂの平面図である。図５（Ａ）、図５（Ｂ）、図６（Ａ）および図６（Ｂ）では、図および原理を分かりやすくするために、アンテナ装置１０３Ａ，１０３Ｂの構造を簡略化して図示している。 FIG. 6A is a plan view of the antenna device 103B according to the third embodiment, and 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. In FIG. 5A, FIG. 5B, FIG. 6A, and FIG. 6B, the structures of the antenna devices 103A and 103B are simplified for easy understanding of the drawings and the principle. .
　アンテナ装置１０３Ａは、導電性部材に対する切り欠き部２１，２２の位置が、第１の実施形態に係るアンテナ装置１０１と異なる。また、アンテナ装置１０３Ｂは、コイル導体の形状がアンテナ装置１０３Ａと異なる。その他の構成は、第１の実施形態に係るアンテナ装置１０１と実質的に同じである。 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.
　以下、第１の実施形態に係るアンテナ装置１０１と異なる部分について説明する。 Hereinafter, parts different from the antenna device 101 according to the first embodiment will be described.
　アンテナ装置１０３Ａは、導電性部材１３Ａと、コイル開口ＣＨを有するコイル導体３３Ａとを備える。アンテナ装置１０３Ａの導電性部材１３Ａは、図５（Ａ）に示すように、切り欠き部２１，２２の一方を縦方向（Ｙ方向）にずらした構成である。そのため、アンテナ装置１０３Ａの切り欠き部２１，２２のいずれも、同一直線上（Ｘ軸上）に配置されておらず、延伸方向も同一直線上にない。 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.
　コイル導体３３Ａは平面形状が矩形であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に接続されている。本実施形態におけるコイル導体３３Ａは、コイル開口ＣＨの縦方向（Ｙ方向）の長さが大きいため、アンテナ装置１０１のコイル導体３１に比べてコイル開口ＣＨが大きい。 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). In the present embodiment, 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.
　図５（Ａ）に示すように、コイル導体３３Ａは、縦方向（Ｙ方向）において、切り欠き部２１，２２がコイル開口ＣＨ内に位置するように配置されている。このような構成であっても、アンテナ装置１０３Ａの単一のコイル開口ＣＨは、平面視で、一方を縦方向（Ｙ方向）にずらした構成である切り欠き部２１，２２に重なる。 As shown in FIG. 5A, 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.
　次に、コイル導体３３Ａに流れる電流と導電性部材１３Ａに生じる電流との関係を説明する。コイル導体３３Ａに一方方向（図５（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１３Ａの切り欠き部２１に電界結合、磁界結合もしくは電磁界結合による電流ｉ１が誘起される。すなわち、コイル導体３３Ａと導電性部材１３Ａとが近接する部分で、電流ｉ０によって切り欠き部２１に、電流ｉ０を打ち消す方向（図５（Ｂ）における時計回り）の電流ｉ１が生じる。このとき、縁端効果により導電性部材１３Ａの切り欠き部２１の縁端の電流密度が高い。切り欠き部２１は導電性部材１３Ａの外縁である第１辺Ｓ１に面している。そのため、切り欠き部２１に誘起された電流ｉ１は、縁端効果により第１辺Ｓ１に流れる。 Next, the relationship between the current flowing through the coil conductor 33A and the current generated in the conductive member 13A will be described. When a current i0 in one direction (counterclockwise in FIG. 5B) flows through the coil conductor 33A, the current i1 due to electric field coupling, magnetic field coupling, or electromagnetic field coupling is generated in the cutout portion 21 of the conductive member 13A by the current i0. Is induced. That is, in the portion where the coil conductor 33A and the conductive member 13A are close to each other, the current i1 is generated in the cutout portion 21 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 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.
　同様に、コイル導体３３Ａに一方方向（図５（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１３Ａの切り欠き部２２に電界結合、磁界結合もしくは電磁界結合による電流ｉ２が誘起される。すなわち、コイル導体３３Ａと導電性部材１３Ａとが近接する部分で、電流ｉ０によって切り欠き部２２に、電流ｉ０を打ち消す方向（図５（Ｂ）における時計回り）の電流ｉ２が生じる。このとき、縁端効果により導電性部材１３Ａの切り欠き部２２の縁端の電流密度が高い。切り欠き部２２は導電性部材１３Ａの外縁である第２辺Ｓ２に面している。そのため、切り欠き部２２に誘起された電流ｉ２は、縁端効果により第２辺Ｓ２に流れる。 Similarly, when a current i0 in one direction (counterclockwise in FIG. 5B) flows through the coil conductor 33A, 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.
　導電性部材１３Ａに生じる電流ｉ１，ｉ２は同相（同位相）であり、両者は重畳（加算）されるため、導電性部材１３Ａの外縁に沿って電流ｉ１＋電流ｉ２が生じる。このように、コイル導体３３Ａは、導電性部材１３Ａと電界、磁界もしくは電磁界を介して結合する。 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. As described above, the coil conductor 33A is coupled to the conductive member 13A via an electric field, a magnetic field, or an electromagnetic field.
　このような構成であっても、単一のコイル開口ＣＨは、平面視で、２つの切り欠き部２１，２２に重なる。したがって、アンテナ装置１０３Ａは第１の実施形態に係るアンテナ装置１０１と基本的な構成は同じであり、アンテナ装置１０１と同様の作用・効果を奏することができる。 Even in such a configuration, the single coil opening CH overlaps the two notches 21 and 22 in a plan view. Therefore, 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.
　また、本実施形態に係るアンテナ装置１０３Ａでは、複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、アンテナ装置の強度が一つの曲げ方向に対して、極端に低下することを抑制できる。また、この構成においては、磁束が強く放射される複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、磁束が強く放射される領域が大きい。したがって、相手側のアンテナと強く結合する領域の大きいアンテナ装置を実現することができる。 Further, in the antenna device 103A according to the present embodiment, 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 | stretching direction is not on the same straight line, the area | region where a magnetic flux is radiated | emitted strongly is large in all of the some notch parts to which a magnetic flux radiates | emits strongly. Therefore, it is possible to realize an antenna device having a large area that is strongly coupled to the antenna on the other side.
　アンテナ装置１０３Ｂは、コイル導体３３Ｂの平面形状がクランク形状であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に接続されている。つまり、コイル導体３３Ｂは、図６（Ａ）に示すように、アンテナ装置１０１のコイル導体３１を横方向（Ｘ方向）の中央部分において、縦方向（Ｙ方向）にずらした構造である。 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).
　図６（Ａ）に示すように、コイル開口ＣＨの縦方向（Ｙ方向）の長さは、切り欠き部２１，２２の縦方向（Ｙ方向）の長さと略同じであり、コイル導体３３Ｂはコイル開口ＣＨの縦方向（Ｙ方向）の位置が切り欠き部２１，２２に一致するように配置されている。すなわち、アンテナ装置１０３Ｂのコイル開口ＣＨは、平面視で（Ｚ方向から視て）、切り欠き部２１，２２に重なる。そのため、図６（Ｂ）に示すように、コイル導体３３Ｂに流れる電流と導電性部材１３Ｂに生じる電流との関係については、アンテナ装置１０３Ａと同様である。 As shown in FIG. 6A, 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 | positions so that the position of the vertical direction (Y direction) of coil opening CH may correspond to the notch parts 21 and 22. FIG. That is, the coil opening CH of the antenna device 103B overlaps the notches 21 and 22 in plan view (viewed from the Z direction). Therefore, as shown in FIG. 6B, the relationship between the current flowing through the coil conductor 33B and the current generated in the conductive member 13B is the same as that of the antenna device 103A.
　このような構成であっても、アンテナ装置１０３Ｂはアンテナ装置１０３Ａと基本的な構成は同じであり、アンテナ装置１０３Ｂと同様の作用・効果を奏することができる。なお、本実施形態のように切り欠き部２１，２２の形成箇所や形状に合わせて、コイル導体３３Ｂの形状を適宜変更することによって、コイル導体３３Ｂの占める面積を小さくすることができる。また、導電性部材１３Ｂの切り欠き部２１，２２が形成されていない領域と対向するコイル開口の領域を小さくすることで、コイル導体３３Ｂとアンテナ装置１０３Ｂ以外のデバイスとの不要な結合を抑えることができる。 Even in such a configuration, 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. Note that 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.
　また、アンテナ装置１０３Ｂで示したように、コイル導体の平面形状は、多角形、円形、楕円形等、適宜変更可能である。 Further, as shown by the antenna device 103B, the planar shape of the coil conductor can be changed as appropriate, such as a polygon, a circle, and an ellipse.
　《第４の実施形態》
　図７（Ａ）は第４の実施形態に係るアンテナ装置１０４Ａの平面図であり、図７（Ｂ）は、コイル導体３４Ａに流れる電流と導電性部材１４Ａに生じる電流との関係を示す、アンテナ装置１０４Ａの平面図である。 << Fourth Embodiment >>
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.
　図８（Ａ）は第４の実施形態に係るアンテナ装置１０４Ｂの平面図であり、図８（Ｂ）は、コイル導体３４Ｂに流れる電流と導電性部材１４Ｂに生じる電流との関係を示す、アンテナ装置１０４Ｂの平面図である。図７（Ａ）、図７（Ｂ）、図８（Ａ）および図８（Ｂ）では、図および原理を分かりやすくするために、アンテナ装置１０４Ａ，１０４Ｂの構造を簡略化して図示している。 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. In 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. .
　アンテナ装置１０４Ａは、導電性部材に対する切り欠き部２１，２２の位置が、第１の実施形態に係るアンテナ装置１０１と異なる。また、アンテナ装置１０４Ｂは、コイル導体の形状がアンテナ装置１０４Ａと異なる。その他の構成は、第１の実施形態に係るアンテナ装置１０１と実質的に同じである。 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.
　以下、第１の実施形態に係るアンテナ装置１０１と異なる部分について説明する。 Hereinafter, parts different from the antenna device 101 according to the first embodiment will be described.
　アンテナ装置１０４Ａは、導電性部材１４Ａと、コイル開口ＣＨを有するコイル導体３４Ａとを備える。導電性部材１４Ａは、縦方向（図７（Ａ）におけるＹ方向）の外縁に第３辺Ｓ３および第４辺Ｓ４をさらに有する。第３辺Ｓ３および第４辺Ｓ４は、図７（Ａ）に示すように、平面視で、互いに対向する辺である。 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.
　導電性部材１４Ａの切り欠き部２１は、導電性部材１４Ａの外縁である第１辺Ｓ１から内側に向かって（図７（Ａ）における＋Ｘ方向）延伸している。一方、切り欠き部２２は、導電性部材１４Ａの外縁である第４辺Ｓ４から内側に向かって（－Ｙ方向）延伸している。図７（Ａ）に示すように、第１辺Ｓ１および第４辺Ｓ４は、平面視で、互いに対向する辺ではない。したがって、アンテナ装置１０４Ａの切り欠き部２１，２２のいずれも、同一直線上に配置されておらず、延伸方向も同一直線上にない。 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). On the other hand, the notch 22 extends inward (−Y direction) from the fourth side S4, which is the outer edge of the conductive member 14A. As shown in FIG. 7A, 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.
　コイル導体３４Ａは、平面形状が矩形であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に直接接続される。コイル導体３４Ａは、平面視で、導電性部材１４Ａの一角（図７（Ａ）における左上の角）に配置される。すなわち、コイル導体３４Ａは、導電性部材１４Ａの二辺（第１辺Ｓ１および第４辺Ｓ４）に近接した位置に配置される。 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.
　図７（Ａ）に示すように、アンテナ装置１０４Ａの単一のコイル開口ＣＨは、平面視で（Ｚ方向から視て）、２つの切り欠き部２１，２２に重なる。 As shown in FIG. 7A, 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).
　次に、コイル導体３４Ａに流れる電流と導電性部材１４Ａに生じる電流との関係を説明する。コイル導体３４Ａに一方方向（図７（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１４Ａの切り欠き部２１に電界結合、磁界結合もしくは電磁界結合による電流ｉ１が誘起される。すなわち、コイル導体３４Ａと導電性部材１４Ａとが近接する部分で、電流ｉ０によって切り欠き部２１に、電流ｉ０を打ち消す方向の電流ｉ１が生じる。このとき、縁端効果により導電性部材１４Ａの切り欠き部２１の縁端の電流密度が高い。切り欠き部２１は導電性部材１４Ａの外縁である第１辺Ｓ１に面している。そのため、切り欠き部２１に誘起された電流ｉ１は、縁端効果により切り欠き部２１から遠ざかる方向で第１辺Ｓ１に沿って流れる。 Next, the relationship between the current flowing in the coil conductor 34A and the current generated in the conductive member 14A will be described. When a current i0 in one direction (counterclockwise in FIG. 7B) flows through the coil conductor 34A, the current i1 due to electric field coupling, magnetic field coupling, or electromagnetic field coupling is generated in the cutout portion 21 of the conductive member 14A by the current i0. Is induced. That is, in the portion where the coil conductor 34A and the conductive member 14A are close to each other, the current i1 in the direction that cancels the current i0 is generated in the notch 21 by the current i0. At this time, 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.
　同様に、コイル導体３４Ａに一方方向（図７（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１４Ａの切り欠き部２２に電界結合、磁界結合もしくは電磁界結合による電流ｉ２が誘起される。すなわち、コイル導体３４Ａと導電性部材１４Ａとが近接する部分で、電流ｉ０によって切り欠き部２２に、電流ｉ０を打ち消す方向の電流ｉ２が生じる。このとき、縁端効果により導電性部材１４Ａの切り欠き部２２の縁端の電流密度が高い。切り欠き部２２は導電性部材１４Ａの外縁であるＳ４に面している。そのため、切り欠き部２２に誘起された電流ｉ２は、縁端効果により第１辺Ｓ４から流れ込む。 Similarly, when a current i0 in one direction (counterclockwise in FIG. 7B) flows through the coil conductor 34A, 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. At this time, 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.
　導電性部材１４Ａに生じる電流ｉ１，ｉ２は同相（同位相）であり両者は重畳（加算）されるため、図７（Ｂ）に示すように、導電性部材１４Ａの外縁の一部（第１辺Ｓ１および第４辺Ｓ４の一部、第２辺Ｓ２、第３辺Ｓ３）に沿って電流ｉ１＋電流ｉ２が生じる。このように、コイル導体３４Ａは、導電性部材１４Ａと電界、磁界もしくは電磁界を介して結合する。 Since the currents i1 and i2 generated in the conductive member 14A are in phase (same phase) and are superimposed (added), as shown in FIG. 7B, a part of the outer edge of the conductive member 14A (first A current i1 + current i2 is generated along a part of the side S1 and the fourth side S4, the second side S2, and the third side S3). As described above, the coil conductor 34A is coupled to the conductive member 14A via an electric field, a magnetic field, or an electromagnetic field.
　このような構成であっても、単一のコイル開口ＣＨは、平面視で、２つの切り欠き部２１，２２に重なる。そして、導電性部材１４Ａは、コイル導体３４Ａに対するブースターアンテナとして機能する。 Even in such a configuration, 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.
　また、切り欠き部２１，２２は、平面視で、互いに対向する辺から導電性部材の内側に向かって延伸する構造に限定されるものではない。本実施形態に係るアンテナ装置１０４Ａに示すように、導電性部材がコイル導体に対するブースターアンテナとして機能するのであれば、複数の切り欠き部が、平面視で、互いに対向しない辺から導電性部材の内側に向かって延伸する構造であってもよい。 Further, 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.
　また、本実施形態に係るアンテナ装置１０４Ａは、複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、アンテナ装置の強度が一つの曲げ方向に対して、極端に低下することを抑制できる。また、この構成おいては、磁束が強く放射される複数の切り欠き部のいずれも、延伸方向が同一直線上にないため、磁束が強く放射される領域が大きい。したがって、相手側のアンテナと強く結合する領域の大きいアンテナ装置を実現することができる。 Further, in the antenna device 104A according to the present embodiment, 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 | stretching direction is not on the same straight line in any of several notch parts to which a magnetic flux is radiated | emitted strongly, the area | region where a magnetic flux is radiated | emitted strongly is large. Therefore, it is possible to realize an antenna device having a large area that is strongly coupled to the antenna on the other side.
　アンテナ装置１０４Ｂは、コイル導体３４Ｂの平面形状がＬ字形であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に接続されている。図８（Ａ）に示すように、第１辺Ｓ１に近接するコイル導体３４Ｂのコイル開口ＣＨの縦方向（Ｙ方向）の長さは、切り欠き部２１の縦方向（Ｙ方向）の長さと略同じである。また、第４辺Ｓ４に近接するコイル導体３４Ｂのコイル開口ＣＨの横方向（Ｘ方向）の長さは、切り欠き部２２の横方向（Ｘ方向）の長さと略同じである。 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). As shown in FIG. 8A, 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. In addition, 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.
　第１辺Ｓ１に近接するコイル導体３４Ｂのコイル開口ＣＨは、縦方向（Ｙ方向）の位置が切り欠き部２１に一致するように配置され、第４辺Ｓ４に近接するコイル導体３４Ｂのコイル開口ＣＨは、横方向（Ｘ方向）の位置が切り欠き部２２に一致するように配置される。したがって、アンテナ装置１０４Ｂの単一のコイル開口ＣＨは、平面視で（Ｚ方向から視て）、２つの切り欠き部２１，２２に重なる。 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).
　次に、コイル導体３４Ｂに流れる電流と導電性部材１４Ｂに生じる電流との関係を説明する。コイル導体３４Ｂに一方方向（図８（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１４Ｂの切り欠き部２１に電界結合、磁界結合もしくは電磁界結合による電流ｉ１が誘起される。すなわち、コイル導体３４Ｂと導電性部材１４Ｂとが近接する部分で、電流ｉ０によって切り欠き部２１に、電流ｉ０を打ち消す方向（図８（Ｂ）における時計回り）の電流ｉ１が生じる。このとき、縁端効果により導電性部材１４Ｂの切り欠き部２１の縁端の電流密度が高い。切り欠き部２１は導電性部材１４Ｂの外縁である第１辺Ｓ１に面している。そのため、切り欠き部２１に誘起された電流ｉ１は、縁端効果により第１辺Ｓ１に流れる。 Next, the relationship between the current flowing through the coil conductor 34B and the current generated in the conductive member 14B will be described. When a current i0 in one direction (counterclockwise in FIG. 8B) flows through the coil conductor 34B, the current i1 due to electric field coupling, magnetic field coupling, or electromagnetic field coupling is generated in the cutout portion 21 of the conductive member 14B by the current i0. Is induced. That is, in the portion where the coil conductor 34B and the conductive member 14B are close to each other, the current i1 is generated in the cutout portion 21 by the current i0 in the direction in which the current i0 is canceled (clockwise in FIG. 8B). At this time, 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.
　同様に、コイル導体３４Ｂに一方方向（図８（Ｂ）における反時計回り）の電流ｉ０が流れた場合、電流ｉ０によって導電性部材１４Ｂの切り欠き部２２に電界結合、磁界結合もしくは電磁界結合による電流ｉ２が誘起される。すなわち、コイル導体３４Ｂと導電性部材１４Ｂとが近接する部分で、電流ｉ０によって切り欠き部２２に、電流ｉ０を打ち消す方向（図８（Ｂ）における時計回り）の電流ｉ２が生じる。このとき、縁端効果により導電性部材１４Ｂの切り欠き部２２の縁端の電流密度が高い。切り欠き部２２は導電性部材１４Ｂの外縁である第４辺Ｓ４に面している。そのため、切り欠き部２２に誘起された電流ｉ２は、縁端効果により第４辺Ｓ４に流れる。 Similarly, when a current i0 in one direction (counterclockwise in FIG. 8B) flows through the coil conductor 34B, the current i0 causes electric field coupling, magnetic field coupling, or electromagnetic field coupling to the notch 22 of the conductive member 14B. A current i2 due to is induced. That is, in a portion where the coil conductor 34B and the conductive member 14B are close to each other, a current i2 in a direction (clockwise in FIG. 8B) that cancels the current i0 is generated in the notch 22 by the current i0. At this time, the current density at the edge of the notch 22 of the conductive member 14B is high due to the edge effect. The notch 22 faces the fourth side S4, which is the outer edge of the conductive member 14B. Therefore, the current i2 induced in the notch 22 flows to the fourth side S4 due to the edge effect.
　導電性部材１４Ｂに生じる電流ｉ１，ｉ２は同相（同位相）であり、両者は重畳（加算）されるため、導電性部材１４Ｂの外縁に沿って電流ｉ１＋電流ｉ２が生じる。このように、コイル導体３４Ｂは、導電性部材１４Ｂと電界、磁界もしくは電磁界を介して結合する。 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. As described above, the coil conductor 34B is coupled to the conductive member 14B via an electric field, a magnetic field, or an electromagnetic field.
　このような構成であっても、アンテナ装置１０４Ｂはアンテナ装置１０４Ａと基本的な構成は同じであり、アンテナ装置１０４Ａと同様の作用・効果を奏することができる。なお、本実施形態のように切り欠き部２１，２２の形成箇所や形状に合わせて、コイル導体３４Ｂの形状を適宜変更することによって、コイル導体３３Ｂの占める面積を小さくすることができる。 Even in such a configuration, 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.
　《第５の実施形態》
　図９は第５の実施形態に係るアンテナ装置１０５の外観斜視図である。 << Fifth Embodiment >>
FIG. 9 is an external perspective view of the antenna device 105 according to the fifth embodiment.
　アンテナ装置１０５は、導電性部材１５およびコイル導体３５が厚さ方向（Ｚ方向）に屈曲している点が、第１の実施形態に係るアンテナ装置１０１と異なる。その他の構成は、第１の実施形態に係るアンテナ装置１０１と実質的に同じである。 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.
　以下、第１の実施形態に係るアンテナ装置１０１と異なる部分について説明する。 Hereinafter, parts different from the antenna device 101 according to the first embodiment will be described.
　アンテナ装置１０５は、導電性部材１５と、コイル開口ＣＨを有するコイル導体３５とを備える。導電性部材１５は、図９に示すように、横方向（Ｘ方向）の両側が厚さ方向（Ｚ方向）に屈曲している。すなわち、導電性部材１５は、縦方向（Ｙ方向）から視て、コの字（Ｃ字）に曲げられた平板であると言える。導電性部材１５は、厚さ方向（Ｚ方向）に屈曲した外縁に第１辺Ｓ１および第２辺Ｓ２を有する。 The antenna device 105 includes a conductive member 15 and a coil conductor 35 having a coil opening CH. As shown in FIG. 9, 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).
　また、導電性部材１５は、切り欠き部２１，２２を有する。切り欠き部２１は、導電性部材１５の外縁である第１辺Ｓ１から内側に向かって（図９における－Ｚ方向および＋Ｘ方向）延伸している。切り欠き部２２は、導電性部材１５の外縁である第２辺Ｓ２から内側に向かって（図９における－Ｚ方向および－Ｘ方向）延伸している。アンテナ装置１０５の切り欠き部２１，２２のいずれも、図９に示すように、同一直線上（Ｘ軸上およびＺ軸上）に配置されている。 Further, 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). As shown 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).
　コイル導体３５は、導電性部材１５と同様に、横方向（Ｘ方向）の両側が厚さ方向（Ｚ方向）に屈曲したスパイラル形状の導体パターンである。コイル導体３５の両端部は図示しない第１給電回路に直接接続される。 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).
　図９に示すように、コイル開口ＣＨの縦方向（Ｙ方向）の長さは、切り欠き部２１，２２の縦方向（Ｙ方向）の長さと略同じであり、コイル導体３５はコイル開口ＣＨの縦方向（Ｙ方向）の位置が切り欠き部２１，２２に一致するように配置されている。すなわち、アンテナ装置１０５のコイル開口ＣＨは、Ｘ方向およびＺ方向から視て、切り欠き部２１，２２に重なる。 As shown in FIG. 9, 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. Are arranged so that their positions in the vertical direction (Y direction) coincide with the notches 21 and 22. That is, 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.
　このように、アンテナ装置１０５は第１の実施形態に係るアンテナ装置１０１と基本的な構成は同じであるため、アンテナ装置１０１と同様の作用・効果を奏することができる。 As described above, 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.
　本実施形態では、コイル導体３５に対するブースターアンテナとして機能する導電性部材１５が、横方向（Ｘ方向）の両側が厚さ方向（Ｚ方向）に屈曲する構造である。コイル導体３５に流れる電流により導電性部材１５に誘起される電流は、厚さ方向（Ｚ方向）に屈曲した外縁である第１辺Ｓ１および第２辺Ｓ２に、縁端効果によって流れる。したがって、この構成により、横方向（Ｘ方向）にも指向性を持つアンテナ装置を実現できる。また、導電性部材１５の厚さ方向（Ｚ方向）に屈曲する部分の角度・長さ等を調整することにより、指向性の設計上の自由度を高めることもできる。 In this embodiment, 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. In addition, 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).
　また、本実施形態で示すように、導電性部材１５およびコイル導体３５は、立体的構造（３次元構造）であってもよい。導電性部材１５およびコイル導体３５の形状は、導電性部材１５がコイル導体３５に対するブースターアンテナとして機能する範囲において適宜変更可能である。すなわち、導電性部材１５がコイル導体３５に対するブースターアンテナとして機能するのであれば、導電性部材１５で電子機器の筐体全体を構成してもよい。 Further, as shown in the present embodiment, 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.
　本実施形態においては、切り欠き部２１は導電性部材１５の外縁である第１辺Ｓ１から－Ｚ方向および＋Ｘ方向に延伸し、切欠き部２２は導電性部材１５の外縁である第２辺Ｓ２から－Ｚ方向および－Ｘ方向に延伸するように、切欠き部２１，２２を形成したが、切り欠き部２１，２２はそれぞれ－Ｚ方向にのみ延伸されていてもよい。すなわち、切り欠き部２１，２２はそれぞれ立体的構造を有する導電性部材１５の側面部分にのみ設けられていてもよい。 In the present embodiment, 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.
　《第６の実施形態》
　図１０は第６の実施形態に係る電子機器２０１の下面図である。 << Sixth Embodiment >>
FIG. 10 is a bottom view of the electronic apparatus 201 according to the sixth embodiment.
　この電子機器２０１は、例えば携帯電話端末（スマートフォンやフィーチャーフォンを含む）、ウェアラブル端末（スマートウォッチやスマートグラス等）、ノートパソコン、タブレットＰＣ、ＰＤＡ、カメラ、ゲーム機、玩具、ＲＦＩＤタグ等やＩＣタグやＳＤ（登録商標）（Ｓｅｃｕｒｅ　Ｄｉｇｉｔａｌ）カード、ＳＩＭカードやＩＣカード等の情報媒体等である。 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.
　電子機器２０１は、アンテナ装置１０２Ａと、定在波型アンテナの放射素子５１，５２とを備える。アンテナ装置１０２Ａの導電性部材１２および定在波型アンテナの放射素子５１，５２は、例えばスマートフォンの下部筐体の一部である。 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.
　アンテナ装置１０２Ａおよび定在波型アンテナの放射素子５１は、間隙部４２を挟んで、縦方向（図１０における－Ｙ方向）に並べて配置される。アンテナ装置１０２Ａおよび定在波型アンテナの放射素子５２は、間隙部４２を挟んで、縦方向（＋Ｙ方向）に並べて配置される。すなわち、電子機器２０１は、図１０に示すように、間隙部４２を挟んで、定在波型アンテナの放射素子５１、アンテナ装置１０２Ａおよび定在波型アンテナの放射素子５２の順で縦方向（Ｙ方向）に配置された構造である。なお、導電性部材および定在波型アンテナの放射素子５１，５２の間に形成された間隙部４２には樹脂部材や金属酸化物等の絶縁体が配置される。 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). In addition, 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.
　アンテナ装置１０２Ａは、第２の実施形態に係るアンテナ装置１０２に対して、カメラ用の孔４１が設けられている点で異なる。図１０に示すように、カメラ用の孔４１内にはカメラモジュール６１が配置されている。また、アンテナ装置１０２の導電性部材１２の開口部２３Ａ，２３Ｂ内には、それぞれスピーカー６２が配置されている。 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.
　コイル導体３１は、平面形状が矩形であるスパイラル形状の導体パターンであり、両端部が図示しない第１給電回路に直接接続される。コイル導体３１は、導電性部材１２の他方主面（図１０における導電性部材１１の裏側の面）に配置される。第１給電回路は第１周波数帯（ＨＦ帯）用ＩＣである。 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.
　定在波型アンテナの放射素子５１，５２は、平面形状が矩形の放射素子であって、導電性を有する平板である。定在波型アンテナの放射素子５１，５２は図示しない第２給電回路に直接接続される。第２給電回路は第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）用ＩＣである。また、定在波型アンテナの放射素子５１，５２は、所定の位置から導電性部材１２に接続されている（図示省略）。 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). Further, the radiating elements 51 and 52 of the standing wave antenna are connected to the conductive member 12 from a predetermined position (not shown).
　また、図１０に示すように、導電性部材１２は、キャパシタＣ１を介して（または直接的に）グランドに接続される。すなわち、高周波的に接地される。キャパシタＣ１は、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）において、低インピーダンスとなり、等価的にショート状態となるリアクタンス素子である。したがって、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）において、導電性部材１２は所定の位置で接地される。 As shown in FIG. 10, 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.
　定在波型アンテナの放射素子５１，５２は、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）で開放端が電流強度ゼロ、接地端が電界強度ゼロとなるように（共振するように）、長さ等が定められている。このようにして、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）において、定在波型アンテナの放射素子５１，５２が電磁波放射に寄与する定在波型の逆Ｆ型アンテナとして作用する。 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.
　このような構成により、第１周波数帯（ＨＦ帯）を使用周波数とするアンテナ装置だけでなく、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）で定在波を生じる定在波型アンテナの放射素子をさらに備えるため、周波数帯の異なる複数のシステムで利用できる電子機器を実現できる。 With such a configuration, 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.
　なお、本実施形態では、図１０に示すように、平面視で、定在波型アンテナの放射素子５１、アンテナ装置１０２Ａおよび定在波型アンテナの放射素子５２が縦方向（Ｙ方向）に並べて配置される例を示したが、この構成に限定されるものではない。定在波型アンテナの放射素子５１、アンテナ装置１０２Ａおよび定在波型アンテナの放射素子５２の配置については、適宜変更可能である。 In the present embodiment, as shown in FIG. 10, 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. Although an example of arrangement is shown, it is not limited to this configuration. 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.
　また、本実施形態では、２つの定在波型アンテナの放射素子５１，５２を備える例について示したが、この構成に限定されるものではない。定在波型アンテナの放射素子の形状、数量等は適宜変更可能である。 In the present embodiment, an example in which the radiation elements 51 and 52 of two standing wave antennas are provided has been described, but 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.
　本実施形態では、アンテナ装置１０２Ａは１つの孔４１が設けられる例について示したが、この構成に限定されるものではない。孔４１の形状、数量、大きさ等は、導電性部材１２がコイル導体３１に対するブースターアンテナとして機能する範囲において適宜変更可能である。 In the present embodiment, 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.
　また、本実施形態では、孔４１および導電性部材１２の開口部２３Ａ，２３Ｂ内にカメラモジュール６１およびスピーカー６２が配置された例を示したが、この構成に限定されるものではない。孔４１および開口部２３Ａ，２３Ｂ内には、例えば操作ボタン、マイクロフォン、光センサ、指紋センサ等を配置することもできる。 In the present embodiment, an example in which the camera module 61 and the speaker 62 are disposed in the hole 41 and the openings 23A and 23B of the conductive member 12 has been described. However, the present invention is not limited to this configuration. For example, 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.
　なお、本願において「定在波型アンテナ」とは、放射素子が共振し、電圧・電流の定在波が分布して電磁波を放射するアンテナをいう。 In the present application, 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.
　また、本実施形態では、定在波型アンテナが逆Ｆ型アンテナである例を示したが、ダイポールアンテナ、モノポールアンテナ、１波長ループアンテナ、逆Ｌ型アンテナ、板状逆Ｆアンテナ（ＰＩＦＡ）等のパッチアンテナ、スロットアンテナ、ノッチアンテナ等の、放射素子上で共振して電流強度および電界強度の定在波が生じる他の定在波型アンテナでも同様に適用できる。 In this embodiment, the standing wave antenna is an inverted F antenna. However, 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.
　《第７の実施形態》
　図１１は第７の実施形態に係る電子機器２０２の正面図である。図１２（Ａ）は電子機器２０２の下面図であり、図１２（Ｂ）は図１１におけるＡ－Ａ断面図であり、電子機器２０２の筐体内部の構造を示す図である。電子機器２０２は筐体の一部に樹脂部材が使用されるが、図１１、図１２（Ａ）および図１２（Ｂ）ではこの樹脂部材の図示が省略されている。 << Seventh 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, and 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.
　電子機器２０２は、上部筐体９１と下部筐体９２とを備える。上部筐体９１は樹脂製であり、その表面にディスプレイ等が設けられている。また、電子機器２０２は、定在波型アンテナの放射素子５１，５２と、アンテナ装置１０５Ａとをさらに備える。 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.
　アンテナ装置１０５Ａの導電性部材１５および定在波型アンテナの放射素子５１，５２は、電子機器２０２の下部筐体９２の一部である。下部筐体９２は、図１２（Ａ）に示すように、間隙部４２を挟んで、定在波型アンテナの放射素子５１、アンテナ装置１０５Ａおよび定在波型アンテナの放射素子５２の順で縦方向（Ｙ方向）に配置された構造である。 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. As shown in FIG. 12 (A), 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).
　定在波型アンテナの放射素子５１，５２は、横方向（Ｘ方向）の両側が縦方向（Ｙ方向）に屈曲した平板である。図１２（Ａ）に示すように、定在波型アンテナの放射素子５１，５２は、厚み方向（Ｚ方向）から視て、Ｕ字に曲げられた平板であると言える。 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).
　アンテナ装置１０５Ａは、コイルアンテナ３を備える点が第５の実施形態に係るアンテナ装置１０５と異なる。コイルアンテナ３は、基材３０、コイル導体３１および図示しない磁性体シートを有する。 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).
　基材３０は可撓性を有する樹脂等の絶縁性材料からなる矩形状の平板であり、一方の主面（図１２（Ｂ）における表側の面）にコイル導体３１が形成されている。コイル導体３１は平面形状が矩形であるスパイラル形状の導体パターンである。基材３０の他方の主面（図１２（Ｂ）における裏側の面）には、図示しない磁性体シートが貼付されている。基材３０は、例えばポリイミド（ＰＩ）や液晶ポリマー（ＬＣＰ）等の樹脂製シートである。 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).
　上部筐体９１の内部にはカメラモジュール６１、回路基板９３、バッテリーパック６３等が収められている。回路基板９３にはコイルアンテナ３、第１給電回路８１、第２給電回路８２Ａ，８２Ｂ、キャパシタ７１，７３、リアクタンス素子７２Ａ，７２Ｂ、接続ピン７４等が実装されている。 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.
　図１２（Ｂ）に示すように、第１給電回路８１がコイル導体３１の両端に接続され、コイル導体３１にキャパシタ７１が並列接続される。コイル導体３１とキャパシタ７１と第１給電回路８１自身が持つ容量成分とでＬＣ共振回路が構成される。この構成により、コイル導体３１が導電性部材１５と結合し、導電性部材１５がコイル導体３１に対するブースターアンテナとして機能する。第１給電回路は第１周波数帯（ＨＦ帯）用のＩＣであり、例えば１３．５６ＭＨｚのＮＦＣ用のＲＦＩＣ素子である。また、キャパシタ７１は例えば共振回路用のチップコンデンサである。 As shown in FIG. 12B, 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.
　第２給電回路８２Ａは、リアクタンス素子７２Ａを介して定在波型アンテナの放射素子５１に接続され、第２給電回路８２Ｂは、リアクタンス素子７２Ｂを介して定在波型アンテナの放射素子５２に接続される。第２給電回路８２Ａ，８２Ｂは第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）用のＩＣであり、例えば１．５ＧＨｚ帯のＧＰＳ用の通信システムの給電回路および２．４ＧＨｚ帯の無線ＬＡＮの通信システムの給電回路である。リアクタンス素子７２Ａ，７２Ｂは例えばチップキャパシタ等の電子部品である。 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.
　導電性部材１５は、接続ピン７４およびキャパシタ７５を介して回路基板９３に形成されたグランド導体に接続される。すなわち、高周波的に接地される。接続ピン７４は例えば可動型プローブピンである。 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.
　キャパシタ７５は、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）において、低インピーダンスとなり、等価的にショート状態となるリアクタンス素子である。したがって、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）において、導電性部材１５は所定の位置で接地される。 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.
　このような構成により、第１周波数帯（ＨＦ帯）を使用周波数とするアンテナ装置だけでなく、第２周波数帯（ＵＨＦ帯またはＳＨＦ帯）で定在波を生じる定在波型アンテナの放射素子をさらに備えるため、周波数帯の異なる複数のシステムで利用できる電子機器を実現できる。 With such a configuration, 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.
　なお、アンテナ装置１０５Ａのコイルアンテナ３は磁性体シートを備える。そのため、磁性体シートの高い透磁率の作用で、少ないターン数の導体パターンで所定のインダクタンスが得られる。また、磁性体シートの集磁効果により、相手側のコイルアンテナとの磁界結合を高めることができる。さらに、磁性体シートを備える構成により、裏面側の磁気シールド効果も得られる。 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.
　また、本実施形態に示すように、定在波型アンテナの放射素子５１，５２の平面形状は矩形の平板に限定されるものではない。定在波型アンテナの放射素子５１，５２の平面形状は、正方形、多角形、円形、楕円形等、適宜変更可能である。また、定在波型アンテナの放射素子５１，５２は、平板に限らず、立体構造等とすることも可能である。 Further, as shown in the present embodiment, 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. Further, 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.
　また、本実施形態では、電子機器２０２の平面形状が矩形である例を示したが、この構成に限定されるものではない。電子機器の形状は、本発明に係るアンテナ装置の導電性部材を筐体の一部または全部とする構成を満たす範囲において適宜変更可能である。 Further, in the present embodiment, an example in which the 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.
　《第８の実施形態》
　図１３は、第８の実施形態に係る電子機器の筐体内部の構造を示す平面図である。なお、図１３では、図の明瞭化のために、下部筐体の図示を省略している。 << Eighth Embodiment >>
FIG. 13 is a plan view showing a structure inside the housing of the electronic device according to the eighth embodiment. In FIG. 13, the lower housing is not shown for the sake of clarity.
　図１３に示す第８の実施形態に係る電子機器は、アンテナ装置１０４Ｃ、上部筐体９１Ａおよび下部筐体等を備える。本実施形態に係る電子機器は例えばスマートフォンである。 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.
　上部筐体９１Ａの内部にはデバイス６１Ａ，６１Ｂ，６２Ａ、回路基板９３Ａ、バッテリーパック６３等が収められている。回路基板９３Ａには、ＵＨＦ帯アンテナ５３、デバイス６１Ａ，６１Ｂ，６２Ａ、第１給電回路（図示省略）等が実装されている。回路基板９３Ａの内部には面状導体１８が形成されている。 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.
　面状導体１８は平面形状がＬ字状の平面導体であり、例えば回路基板９３Ａに形成されたグランド導体である。切り欠き部２１Ａは、面状導体１８の一方の角部（図１３における面状導体１８の左上の角部）に配置されている。切り欠き部２２Ａは、面状導体１８の外縁である第１辺（図１３における面状導体１８の左辺）から内側に向かって延伸している。切り欠き部２３Ａは、面状導体１８の外縁である第３辺（図１３における面状導体１８の下辺）から内側に向かって延伸している。 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.
　本実施形態では、この面状導体１８が本発明における「導電性部材」「電子機器が備える機能部品」に相当する。 In the present embodiment, the planar conductor 18 corresponds to the “conductive member” and “functional component included in the electronic device” according to the present invention.
　デバイス６１Ａ，６１Ｂ，６２Ａは、Ｚ方向から視て、面状導体１８に形成された切り欠き部２１Ａ，２２Ａ，２３Ａ内にそれぞれ配置されている。デバイス６１Ａは例えば背面側にあるリアカメラであり、デバイス６１Ｂは例えばスマートフォンのディスプレイ側にあるフロントカメラであり、デバイス６２Ａは例えばイヤホンジャックである。ＵＨＦ帯アンテナ５３は例えばセルラーシステム、ＧＰＳ（Ｇｌｏｂａｌ　Ｐｏｓｉｔｉｏｎｉｎｇ　Ｓｙｓｔｅｍ）、Ｗｉ－Ｆｉ（登録商標）またはＢｌｕｅｔｏｏｔｈ（登録商標）等に使用されるアンテナである。 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, and 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).
　図示しない下部筐体の内側にはコイルアンテナ３Ａが貼付されている。本実施形態に係るコイルアンテナ３Ａは、基材３０Ａおよびコイル導体３４Ｃを備える。コイル導体３４Ｃは、第４の実施形態で説明したコイル導体３４Ｂのように、平面形状がＬ字形であるスパイラル形状の導体パターンであり、基材３０Ａの主面に形成される。コイル導体３４Ｃの両端部は、可動プローブピン等を介して、図示しない第１給電回路に接続される。本実施形態に係る下部筐体および基材３０Ａには、リアカメラであるデバイス６１Ａに対応する位置に孔４３が設けられている。 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.
　コイル導体３４Ｃのコイル開口ＣＨは、平面視で（Ｚ方向から視て）、３つの切り欠き部２１Ａ，２２Ａ，２３Ａに重なる。本実施形態では、これらコイル導体３４Ｃと面状導体１８とでアンテナ装置１０４Ｃが構成される。 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). In the present embodiment, the coil conductor 34C and the planar conductor 18 constitute an antenna device 104C.
　この構成により、周波数帯の異なる複数のシステムで利用できる電子機器を実現できる。 This configuration makes it possible to implement electronic devices that can be used in multiple systems with different frequency bands.
　なお、本実施形態では、コイルアンテナ３Ａのコイル開口ＣＨが、平面視で（Ｚ方向から視て）、３つの切り欠き部に重なる例を示したが、この構成に限定されるものではない。コイルアンテナのコイル開口は、Ｚ方向から視て、３つ以上の切り欠き部に重なっていてもよい。 In the present embodiment, an example in which the coil opening CH of the coil antenna 3A overlaps the three notches in a plan view (viewed from the Z direction) is shown, but 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.
　なお、上述したように、導電性部材の平面形状は矩形に限定されるものではなく、本実施形態で示したように、導電性部材の平面形状がＬ字状であってもよい。また、切り欠き部の位置は、本実施形態で示したように、切り欠き部が導電性部材の角部に配置されるものに限らない。切り欠き部の位置は、導電性部材がコイル導体に対するブースターアンテナとして機能する範囲において適宜変更可能である。 As described above, 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. In addition, 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.
　また、本実施形態で示したように、回路基板７３の内部に形成される面状導体（グランド導体）を導電性部材として利用することもできる。この構成により、導電性部材を別途設ける必要がなく、製造が容易で低コスト化できる。 Also, as shown in the present embodiment, 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.
　なお、本実施形態では、電子機器の下部筐体の内側にコイルアンテナ３Ａを貼付する構成例を示したが、これに限定されるものではない。コイルアンテナは上部筐体の内側に貼付されてもよく、また、例えば回路基板と筐体との間にあるインナーカバー等に固定されていてもよい。 In addition, in this embodiment, although the structural example which affixes the coil antenna 3A inside the lower housing | 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.
　《第９の実施形態》
　図１４は、第９の実施形態に係る電子機器の筐体内部の構造を示す平面図である。なお、図１４では、図の明瞭化のために、下部筐体の図示を省略している。 << Ninth embodiment >>
FIG. 14 is a plan view showing the structure inside the housing of the electronic device according to the ninth embodiment. In FIG. 14, the lower housing is not shown for the sake of clarity.
　図１４に示す第９の実施形態に係る電子機器は、アンテナ装置１０１Ａ、上部筐体９１Ｂおよび下部筐体等を備える。本実施形態に係る電子機器は例えばスマートフォンである。 14 includes an antenna device 101A, an upper housing 91B, a lower housing, and the like. The electronic device according to the present embodiment is a smartphone, for example.
　上部筐体９１Ｂの内部にはデバイス６１Ａ，６１Ｂ，６２Ａ、回路基板９３Ｂ、バッテリーパック６３等が収められている。回路基板９３Ｂには、ＵＨＦ帯アンテナ５３、デバイス６１Ａ，６１Ｂ，６２Ａ、シールドケース１９、第１給電回路（図示省略）等が実装されている。 Inside the upper casing 91B, devices 61A, 61B, 62A, a circuit board 93B, a battery pack 63, and the like are housed. 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.
　シールドケース１９は平面形状がＴ字状の導体カバーであり、切り欠き部２１Ｂ，２２Ｂを有する。シールドケース１９は例えば回路基板に実装され、集積回路等を覆う金属性のカバーである。切り欠き部２１Ｂは、シールドケース１９の一方の角部（図１４におけるシールドケース１９の左上の角部）に配置されている。切り欠き部２２Ｂは、シールドケース１９の他方の角部（図１４におけるシールドケース１９の左下の角部）に配置されている。 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).
　本実施形態では、このシールドケース１９が本発明における「導電性部材」「電子機器が備える機能部品」に相当する。 In this embodiment, the shield case 19 corresponds to the “conductive member” and the “functional component included in the electronic device” according to the present invention.
　デバイス６１Ａ，６１Ｂは、Ｚ方向から視て、シールドケース１９に形成された切り欠き部２１Ｂ，２２Ｂ内にそれぞれ配置されている。 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.
　図示しない下部筐体の内側にはコイルアンテナ３Ｂが貼付されている。本実施形態に係るコイルアンテナ３Ｂは、基材３０Ｂおよびコイル導体３１Ａを備える。コイル導体３１Ａは、第１の実施形態で説明したコイル導体３１のように、平面形状が矩形であるスパイラル形状の導体パターンであり、基材３０Ｂの主面に形成される。コイル導体３１Ａの両端部は、可動プローブピン等を介して図示しない第１給電回路に接続される。本実施形態に係る下部筐体および基材３０Ｂには、リアカメラであるデバイス６１Ａに対応する位置に孔４３が設けられている。 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.
　コイル導体３１Ａのコイル開口ＣＨは、平面視で（Ｚ方向から視て）、２つの切り欠き部２１Ｂ，２２Ｂに重なる。本実施形態では、これらコイル導体３１Ａとシールドケース１９とでアンテナ装置１０１Ａが構成される。 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). In the present embodiment, the coil conductor 31A and the shield case 19 constitute an antenna device 101A.
　この構成により、周波数帯の異なる複数のシステムで利用できる電子機器を実現できる。 This configuration makes it possible to implement electronic devices that can be used in multiple systems with different frequency bands.
　なお、本実施形態では、機能部品（シールドケース１９）が有する切り欠き部にリアカメラやフロントカメラが配置される例を示したが、この構成に限定されるものではない。機能部品が有する切り欠き部には、例えばイヤホンジャック等のコネクタ、スピーカー、機械スイッチ、ボタン、マイクロフォン、光センサ、指紋センサ等を配置することもできる。 In the present embodiment, an example is shown in which the rear camera and the front camera are arranged in the cutout portion of the functional component (shield case 19), but the present invention is not limited to this configuration. For example, 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.
　なお、本発明における「機能部品」とは、少なくとも電子機器に含まれ、アンテナ装置としての機能だけでなく、アンテナ装置以外の機能を有する部品である。本発明における「機能部品」は第８・第９の実施形態で示した回路基板に形成されたグランド導体やシールドケースに限らず、例えばスマートフォンのディスプレイ背面に形成された導電性シールドや、バッテリーパック等であってもよい。 In addition, 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. For example, the conductive shield formed on the back of the display of the smartphone, the battery pack Etc.
　《その他の実施形態》
　なお、上述の実施形態では、主にＮＦＣ等の磁界結合を利用した通信システムにおけるアンテナ装置および電子機器について説明したが、上述の実施形態におけるアンテナ装置および電子機器は、磁界結合を利用した非接触電力伝送システム（電磁誘導方式、磁界共鳴方式）でも同様に用いることができる。上述の実施形態におけるアンテナ装置は、例えばＨＦ帯（特に６．７８ＭＨｚまたは６．７８ＭＨｚ近傍）の周波数で使用される磁界共鳴方式の非接触電力伝送システムにおける受電装置の受電アンテナ装置や送電装置の送電アンテナ装置として適用できる。アンテナ装置は受電装置に備わった負荷（二次電池等）に電力を供給する給電回路（受電回路）に接続される。この場合でも、アンテナ装置は、受電アンテナ装置や送電アンテナ装置として機能する。アンテナ装置のコイル導体の両端は、使用周波数帯（ＨＦ帯、特に６．７８ＭＨｚまたは６．７８ＭＨｚ近傍）を利用する受電回路や送電回路に接続される。 << Other Embodiments >>
In the above-described embodiment, the antenna device and the electronic device in the communication system mainly using magnetic field coupling such as NFC have been described. However, 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).
Ｃ１…キャパシタ
ＣＨ…コイル開口
ｉ０，ｉ１，ｉ２，ｉ３…電流
Ｓ１…第１辺
Ｓ２…第２辺
Ｓ３…第３辺
Ｓ４…第４辺
３，３Ａ，３Ｂ…コイルアンテナ
１１，１２，１３Ａ，１３Ｂ，１４Ａ，１４Ｂ，１５…導電性部材
１８…シールドケース（導電性部材）
１９…面状導体（導電性部材）
２１，２１Ａ，２１Ｂ，２２，２２Ａ，２２Ｂ…切り欠き部
２３Ａ，２３Ｂ…開口部
２４Ａ，２４Ｂ…スリット部
３０…基材
３１，３１Ａ，３３Ａ，３３Ｂ，３４Ａ，３４Ｂ，３４Ｃ，３５…コイル導体
４１，４３…孔
４２…間隙部
５１，５２…定在波型アンテナの放射素子
５３…ＵＨＦ帯アンテナ
６１…カメラモジュール
６１Ａ…リアカメラ
６１Ｂ…フロントカメラ
６２…スピーカー
６２Ａ…イヤホンジャック
６３…バッテリーパック
７１，７５…キャパシタ
７２Ａ，７２Ｂ…リアクタンス素子
７４…接続ピン
８１…第１給電回路
８２Ａ，８２Ｂ…第２給電回路
９１，９１Ａ，９１Ｂ…上部筐体
９２…下部筐体
９３，９３Ａ，９３Ｂ…回路基板
１０１，１０１Ａ，１０２，１０２Ａ，１０３Ａ，１０３Ｂ，１０４Ａ，１０４Ｂ，１０４Ｃ，１０５，１０５Ａ…アンテナ装置
２０１，２０２…電子機器 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 ... Radiating element 53 of standing wave antenna ... UHF band antenna 61 ... Camera module 61A ... Rear camera 61B ... Front camera 62 ... Speaker 62A ... Earphone jack 63 ... Battery pack 71, 75 ... Capacitors 72A, 72B ... Reactance element 74 ... Connection pin 81 ... First feed circuit 82A, 82B ... Second feed circuit 91, 91A, 91B ... Upper housing 92 ... Lower housing 93, 93A, 93B ... Circuit board 101 , 101A, 102, 102A, 103A, 103B, 104A, 104B, 104C, 05,105A ... the antenna device 201, 202 ... electronic equipment

Claims (11)

  1. 　コイル開口を有するコイル導体と、
    　外縁から内側に向かって延伸する複数の切り欠き部を有する導電性部材と、
    　を備え、
    　前記コイル開口は、前記複数の切り欠き部に重なる、アンテナ装置。     A coil conductor having a coil opening;
    A conductive member having a plurality of notches extending inward from the outer edge;
    With
    The antenna device, wherein the coil opening overlaps the plurality of notches.
  2. 　前記切り欠き部は、前記導電性部材の内側に形成される開口部と、前記導電性部材の前記外縁から前記開口部に向かって延伸するスリット部とを有する、請求項１に記載のアンテナ装置。 The antenna device according to claim 1, wherein the notch includes an opening formed inside the conductive member and a slit extending from the outer edge of the conductive member toward the opening. .
  3. 　前記導電性部材は、前記外縁に複数の辺を有し、
    　前記複数の切り欠き部は、異なる前記辺から内側に向かって延伸する、請求項１または２に記載のアンテナ装置。     The conductive member has a plurality of sides on the outer edge,
    The antenna device according to claim 1, wherein the plurality of cutout portions extend inward from the different sides.
  4. 　前記複数の切り欠き部は、平面視で、互いに対向する辺から内側に向かって延伸する、請求項３に記載のアンテナ装置。 The antenna device according to claim 3, wherein the plurality of cutout portions extend inward from opposite sides in plan view.
  5. 　前記複数の切り欠き部のいずれも、延伸方向が同一直線上にない、請求項１から４のいずれかに記載のアンテナ装置。 The antenna device according to any one of claims 1 to 4, wherein none of the plurality of cutout portions has an extending direction that is not on the same straight line.
  6. 　アンテナ装置と、
    　第１周波数帯を使用周波数とする第１給電回路と、
    　を備え、
    　前記アンテナ装置は、
    　　コイル開口を有するコイル導体と、
    　　外縁から内側に向かって延伸する複数の切り欠き部を有する導電性部材と、
    　　を有し、
    　　前記コイル開口は、前記複数の切り欠き部に重なり、
    　前記第１給電回路は、前記コイル導体に接続される、または、前記コイル導体と電界結合、磁界結合もしくは電磁界結合する、電子機器。     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 supply circuit is an electronic device that is connected to the coil conductor or that is coupled to the coil conductor by electric field coupling, magnetic field coupling, or electromagnetic field coupling.
  7. 　前記第１周波数帯よりも高い第２周波数帯で、定在波が生じる定在波型アンテナの放射素子をさらに備える、請求項６に記載の電子機器。 The electronic device according to claim 6, further comprising a radiating element of a standing wave antenna that generates a standing wave in a second frequency band higher than the first frequency band.
  8. 　前記導電性部材は、前記電子機器の筐体の一部または全部である、請求項６または７に記載の電子機器。 The electronic device according to claim 6 or 7, wherein the conductive member is a part or all of a casing of the electronic device.
  9. 　前記導電性部材は、前記電子機器が備える機能部品である、請求項６または７に記載の電子機器。 The electronic device according to claim 6 or 7, wherein the conductive member is a functional component included in the electronic device.
  10. 　回路基板をさらに備え、
    　前記機能部品は、前記回路基板に形成される面状導体である、請求項９に記載の電子機器。     A circuit board,
    The electronic device according to claim 9, wherein the functional component is a planar conductor formed on the circuit board.
  11. 　前記機能部品はシールドケースである、請求項９に記載の電子機器。 The electronic device according to claim 9, wherein the functional component is a shield case.
PCT/JP2016/058235 2015-03-24 2016-03-16 Antenna apparatus and electronic device WO2016152662A1 (en)

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