WO2020158638A1 - Antenna device and electronic apparatus - Google Patents

Antenna device and electronic apparatus Download PDF

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Publication number
WO2020158638A1
WO2020158638A1 PCT/JP2020/002682 JP2020002682W WO2020158638A1 WO 2020158638 A1 WO2020158638 A1 WO 2020158638A1 JP 2020002682 W JP2020002682 W JP 2020002682W WO 2020158638 A1 WO2020158638 A1 WO 2020158638A1
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WO
WIPO (PCT)
Prior art keywords
coil conductor
conductor portion
main surface
magnetic body
antenna device
Prior art date
Application number
PCT/JP2020/002682
Other languages
French (fr)
Japanese (ja)
Inventor
久保　浩行
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
Publication of WO2020158638A1 publication Critical patent/WO2020158638A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material

Definitions

  • the present invention generally relates to an antenna device and an electronic device, and more specifically, to an antenna device including a coil conductor and a magnetic body, and an electronic device including the antenna device.
  • Patent Document 1 an antenna device in which a magnetic material is inserted into the opening of a coil antenna is known (for example, refer to Patent Document 1).
  • the conventional antenna device described in Patent Document 1 includes a coil antenna, a magnetic body, and two terminal electrodes.
  • the two terminal electrodes may be brought into conduction while applying pressure with a spring pin (pogo pin), for example.
  • a spring pin for example.
  • pressure is applied to the magnetic body and the magnetic body may be broken, so that the communication characteristics may not be stable.
  • Patent Document 1 discloses a configuration in which coil conductors are formed on both surfaces of a substrate and terminal electrodes are formed on one surface of the substrate (see FIG. 9 of Patent Document 1). Further, Patent Document 1 discloses a configuration in which a region that does not overlap with a magnetic material is provided in the opening of the coil conductor, and a terminal electrode is formed in the region (see FIG. 12 of Patent Document 1). ).
  • the antenna device described in Patent Document 1 since the conductors are formed on both surfaces of the substrate, the cost becomes high and the entire antenna device becomes thick. Moreover, since the width of the magnetic body is narrowed, the aperture is substantially reduced, and it is difficult to improve communication characteristics. That is, the antenna device described in Patent Document 1 has problems that the cost is high and the communication characteristics are deteriorated.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide an antenna device and an electronic device that can improve communication characteristics while stabilizing the communication characteristics at low cost. ..
  • the antenna device includes a coil conductor, a magnetic body, and a first terminal electrode and a second terminal electrode.
  • the coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction.
  • the coil conductor has a coil opening.
  • the magnetic body has a first main surface and a second main surface.
  • the first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor.
  • the first coil conductor portion is provided on the first main surface side with respect to the magnetic body.
  • the second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other.
  • the first coil conductor portion and the second coil conductor portion overlap the magnetic body.
  • the first terminal electrode is provided in the coil opening.
  • the first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
  • the antenna device includes a coil conductor, a magnetic body, and a first terminal electrode and a second terminal electrode.
  • the coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction.
  • the coil conductor has a coil opening.
  • the magnetic body has a first main surface and a second main surface.
  • the first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor.
  • the first coil conductor portion is provided on the first main surface side with respect to the magnetic body.
  • the second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other.
  • the first coil conductor portion and the second coil conductor portion overlap the magnetic body.
  • the coil conductor has a convex portion in a plan view of the first main surface.
  • the first terminal electrode is provided inside the coil opening and in a portion surrounded by the convex portion.
  • the first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
  • the electronic device includes an antenna device and a housing.
  • the antenna device includes a coil conductor, a magnetic body, a first terminal electrode and a second terminal electrode.
  • the coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction.
  • the coil conductor has a coil opening.
  • the magnetic body has a first main surface and a second main surface.
  • the first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor.
  • the first coil conductor portion is provided on the first main surface side with respect to the magnetic body.
  • the second coil conductor portion is provided on the second main surface side with respect to the magnetic body.
  • the first coil conductor portion and the second coil conductor portion do not overlap each other. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body.
  • the first terminal electrode is provided in the coil opening. The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
  • the antenna device is provided in the housing.
  • the electronic device includes an antenna device and a housing.
  • the antenna device includes a coil conductor, a magnetic body, a first terminal electrode and a second terminal electrode.
  • the coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction.
  • the coil conductor has a coil opening.
  • the magnetic body has a first main surface and a second main surface.
  • the first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor.
  • the first coil conductor portion is provided on the first main surface side with respect to the magnetic body.
  • the second coil conductor portion is provided on the second main surface side with respect to the magnetic body.
  • the first coil conductor portion and the second coil conductor portion do not overlap each other.
  • the first coil conductor portion and the second coil conductor portion overlap the magnetic body.
  • the coil conductor has a convex portion in a plan view of the first main surface.
  • the first terminal electrode is provided inside the coil opening and in a portion surrounded by the convex portion.
  • the first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
  • the antenna device is provided in the housing.
  • the antenna device and the electronic device according to the above aspects of the present invention, it is possible to improve communication characteristics while stabilizing the communication characteristics at low cost.
  • FIG. 1 is a plan view of the antenna device according to the first embodiment.
  • FIG. 2 is a cross-sectional view of the antenna device of the above, taken along the line A1-A1 of FIG.
  • FIG. 3 is an exploded view of the above antenna device.
  • 4A and 4B are schematic diagrams for explaining the flow of magnetic flux in the above antenna device.
  • FIG. 5 is a plan view of the antenna device according to the second embodiment.
  • FIG. 6 is a sectional view taken along the line A2-A2 of FIG. 5 in the antenna device of the above.
  • FIG. 7 is an exploded view of the above antenna device.
  • 8A and 8B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above.
  • FIG. 9 is a plan view of the antenna device according to the third embodiment.
  • FIG. 10 is a sectional view taken along the line A3-A3 of FIG. 9 in the antenna device of the above.
  • FIG. 11 is an exploded view of the above antenna device.
  • 12A and 12B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above.
  • FIG. 13 is a plan view of the antenna device according to the fourth embodiment.
  • FIG. 14 is a cross-sectional view taken along the line A4-A4 of FIG. 13 in the antenna device of the above.
  • FIG. 15 is an exploded view of the above antenna device.
  • 16A and 16B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above.
  • FIG. 17 is a plan view of the antenna device according to the fifth embodiment.
  • FIG. 18 is a plan view of the antenna device according to the sixth embodiment.
  • FIG. 19 is a schematic configuration diagram of an electronic device according to the seventh embodiment.
  • FIGS. 1 to 19 referred to in the following embodiments and the like are schematic views, and the ratio of the size and thickness of each constituent element in the drawings does not necessarily reflect the actual dimensional ratio. Not exclusively.
  • the “antenna device” shown in each embodiment is an antenna device that performs wireless transmission by magnetically coupling with an antenna device of an external device that is a communication partner.
  • wireless transmission is used as a concept including both near field communication and wireless power supply (including “wireless charging”). Since the antenna device performs wireless transmission by magnetic field coupling, the length of the current path of the antenna device, that is, the line length of the coil conductor described later is sufficiently smaller than the wavelength ⁇ at the frequency used, and is ⁇ /10 or less. .. Therefore, the radiation efficiency of electromagnetic waves is low in the used frequency band.
  • the wavelength ⁇ mentioned here indicates an effective wavelength in consideration of the wavelength shortening effect due to the dielectric properties and magnetic permeability of the base material on which the conductor is formed. Both ends of the coil conductor are connected to a power supply circuit, and a current of substantially uniform magnitude flows along the current path of the antenna device, that is, the coil conductor.
  • NFC Near Field Communication
  • the wireless power feeding method used in the "antenna device” includes, for example, a magnetic field coupling method such as an electromagnetic induction method and a magnetic field resonance method.
  • a magnetic field coupling method such as an electromagnetic induction method and a magnetic field resonance method.
  • Qi registered trademark
  • WPC Wireless Power Consortium
  • a wireless power feeding standard of the magnetic field resonance method for example, there is a standard “AirFuel Resonant” established by the AirFuel (registered trademark) Alliance.
  • the “antenna device” shown in each embodiment will be described as an example of one used for close proximity wireless communication.
  • the antenna device 1 includes a base material 2, a coil conductor 3, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6.
  • the antenna device 1 further includes a protective layer (not shown).
  • the antenna device 1 is used for a mobile phone such as a smartphone or a wearable terminal such as a smart watch, for example.
  • the antenna device 1 is used, for example, in headphones or a hearing aid.
  • the base material 2 is formed in a plate shape or a sheet shape, and has a first main surface 21 and a second main surface 22 that face each other.
  • the base material 2 has a through hole 23 penetrating in the thickness direction of the base material 2 (second direction D2). The width between the outer peripheral edge and the inner peripheral edge of the base material 2 is large enough to provide the coil conductor 3.
  • the material of the base material 2 is an electrically insulating material such as resin.
  • the electrically insulating material used for the base material 2 is, for example, polyimide, PET (Poly Ethylene Terephthalate), or liquid crystal polymer (Liquid Crystal Polymer: LCP).
  • the base material 2 has a rectangular main part 24 and a protruding part 25 protruding from a part of the main part 24.
  • the main portion 24 and the protruding portion 25 are integrally formed.
  • the main portion 24 has a rectangular ring shape in a plan view from the thickness direction (second direction D2) of the base material 2.
  • the projecting portion 25 is provided so as to project in the first direction D1 from one side of the main portion 24 along the third direction D3.
  • the third direction D3 is a direction orthogonal to both the first direction D1 and the second direction D2.
  • the projecting portion 25 projects in the first direction D1 from a portion closer to the end than the center of one side of the main portion 24 in the third direction D3.
  • the projecting portion 25 projects from the left side of the center of one side of the main portion 24. This makes it possible to increase the number of substrates 2 to be taken from one sheet, as compared with the case where the projecting portion 25 projects from the center of one side of the main portion 24.
  • the coil conductor 3 is provided on the base material 2 as shown in FIGS. More specifically, the coil conductor 3 is provided on the first main surface 21 of the base material 2.
  • the coil conductor 3 is provided on the first main surface 21 of the base material 2 by forming a copper film or an aluminum film on the first main surface 21 of the base material 2 by etching or printing, for example. It should be noted that the coil conductor 3 is not limited to being provided on the first main surface 21 of the base material 2, but a part or all of the coil conductor 3 is provided on the second main surface 22 of the base material 2. May be.
  • the coil conductor 3 has a coil opening 35.
  • the coil conductor 3 is provided on the base material 2 in a spiral shape around an axis along the second direction D2. In the example of FIG. 1, the coil conductor 3 is provided on the base material 2 in a state of being wound five times.
  • the material of the coil conductor 3 is, for example, copper or aluminum.
  • the coil conductor 3 has a first coil conductor portion 31 and a second coil conductor portion 32.
  • the first coil conductor portion 31 and the second coil conductor portion 32 are adjacent to each other in the first direction D1. That is, the first coil conductor portion 31 and the second coil conductor portion 32 are arranged side by side in the first direction D1.
  • the first coil conductor portion 31 and the second coil conductor portion 32 are provided so as not to overlap each other in a plan view of the first main surface 41 of the magnetic body 4, that is, a plan view from the second direction D2.
  • a region where the coil conductor is formed in the first coil conductor portion 31 and a region between lines of the coil conductor are formed.
  • the formation region of the first coil conductor portion 31 that includes is provided so as not to overlap with the formation region of the second coil conductor portion 32 that includes the formation region of the coil conductor of the second coil conductor portion 32 and the region between the lines of the coil conductor.
  • the coil conductor 3 may be a two-dimensional coil conductor or a three-dimensional coil conductor.
  • the two-dimensional coil conductor means a coil conductor having a shape in which it is spirally wound a plurality of times around a winding axis on one plane.
  • the three-dimensional coil conductor refers to a coil conductor having a shape such that the coil conductor is spirally wound a plurality of times around the winding axis along the winding axis.
  • FIG. 1 shows a two-dimensional coil conductor.
  • the first coil conductor portion 31 is provided on the first main surface 41 side with respect to the magnetic body 4.
  • “provided on the first main surface 41 side with respect to the magnetic body 4 ” refers to a positional relationship in which the second main surface 42 is closer to the first main surface 41.
  • the first coil conductor portion 31 is arranged closer to the first main surface 41 than the second main surface 42 of the magnetic body 4 in the second direction D2.
  • the second coil conductor portion 32 is provided on the second main surface 42 side with respect to the magnetic body 4.
  • “provided on the second main surface 42 side with respect to the magnetic body 4 ” refers to a positional relationship in which the first main surface 41 is closer to the second main surface 42.
  • the second coil conductor portion 32 is arranged closer to the second main surface 42 than the first main surface 41 of the magnetic body 4 in the second direction D2.
  • the first coil conductor portion 31 and the second coil conductor portion 32 overlap the magnetic body 4.
  • the coil conductor 3 further includes a plurality of (two in the illustrated example) third coil conductor portions 33 different from the first coil conductor portion 31 and the second coil conductor portion 32.
  • Each of the plurality of third coil conductor portions 33 is provided between the first coil conductor portion 31 and the second coil conductor portion 32. More specifically, one end of each third coil conductor portion 33 is connected to the first coil conductor portion 31, and the other end of each third coil conductor portion 33 is connected to the second coil conductor portion 32.
  • the coil conductor 3 further includes a fourth coil conductor portion 34.
  • the fourth coil conductor portion 34 is inserted in the first coil conductor portion 31.
  • the fourth coil conductor portion 34 is provided along a first direction D1 that is orthogonal to the third direction D3 along which the first coil conductor portion 31 extends.
  • the fourth coil conductor portion 34 has a first portion 341, a second portion 342, and a third portion 343.
  • the first portion 341 and the second portion 342 extend from the first coil conductor portion 31 along the first direction D1.
  • the first portion 341 and the second portion 342 overlap the magnetic body 4 in a plan view of the first main surface 41 of the magnetic body 4.
  • the third portion 343 projects in the first direction D1 with respect to the magnetic body 4 and does not overlap the magnetic body 4.
  • the third portion 343 includes a first piece 344 connected to an end of the first portion 341, a second piece 345 connected to an end of the second portion 342, a first piece 344 and a second piece. 345 and a third piece 346 that connects the two.
  • a region where the third portion 343 is provided that is, a region that protrudes in the first direction D1 with respect to the magnetic body 4 in a plan view of the first main surface 41 of the magnetic body and does not overlap the magnetic body 4 is defined.
  • the 1st main surface 41 of the magnetic body 4 can be paraphrased to the 1st main surface 21 and the 2nd main surface 22 of the base material 2, and the 2nd main surface 42 of the magnetic body 4, respectively.
  • the first coil conductor portion 31, the second coil conductor portion 32, the plurality of third coil conductor portions 33, and the fourth coil conductor portion 34 are continuous so as to define one coil opening 35, and thus the spiral. It is wound into a shape.
  • the coil conductor 3 is wound so that the first terminal electrode 5 and the later-described first wiring portion 51 are located inside the coil opening 35.
  • the fourth coil conductor portion 34 is located so as to surround the first terminal electrode 5 and a first wiring portion 51 described later.
  • the line width ⁇ 1 of the first coil conductor portion 31 is thicker than the line width ⁇ 2 of the second coil conductor portion 32. More specifically, in the state where the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side, the line width ⁇ 1 of the first coil conductor portion 31 is equal to that of the second coil conductor portion 32. It is thicker than the line width ⁇ 2. Thereby, the communication characteristics of the antenna device 1 can be further improved.
  • the coil conductor 3 also has a first end 36 and a second end 37.
  • the first terminal electrode 5 is electrically connected to the first end 36
  • the second terminal electrode 6 is electrically connected to the second end 37. More specifically, the first end 36 is connected to the first terminal electrode 5 via a first wiring portion 51 described below.
  • the second end 37 is connected to the second terminal electrode 6 via a second wiring portion 61 described below.
  • the coil opening 35 has a first opening area 351 and a second opening area 352.
  • the second opening region 352 communicates with the first opening region 351.
  • the first opening region 351 is a region surrounded by the first coil conductor portion 31, the second coil conductor portion 32, and the plurality of third coil conductor portions 33.
  • the second opening region 352 is a region surrounded by the fourth coil conductor portion 34.
  • the protective layer (not shown) covers the coil conductor 3, the first terminal electrode 5, and the second terminal electrode 6 provided on the base material 2, and protects the base material 2 and the coil from external force.
  • the conductor 3, the first terminal electrode 5, and the second terminal electrode 6 are protected.
  • the protective layer is formed in a plate shape or a sheet shape.
  • the material of the protective layer is an electrically insulating material such as resin.
  • the electrically insulating material used for the protective layer is, for example, polyimide or liquid crystal polymer.
  • the protective layer is attached to the first main surface 21 of the base material 2 via, for example, an adhesive layer (not shown).
  • the magnetic material 4 has a rectangular plate shape or a rectangular sheet shape, and has a first main surface 41 and a second main surface 42.
  • the first main surface 41 of the magnetic body 4 and the second main surface 42 of the magnetic body 4 face each other in the second direction D2.
  • the magnetic body 4 is provided in a state of passing through the through hole 23 of the base material 2. More specifically, the magnetic body 4 has a portion located on the first main surface 21 side of the base material 2 and a portion located on the second main surface 22 side of the base material 2.
  • the material of the magnetic body 4 is a ferromagnetic material such as ferrite.
  • the material of the magnetic body 4 is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet.
  • the ferromagnetic material used for the magnetic body 4 include Mn—Zn—Fe based ferrite or Ni—Zn—Fe based ferrite.
  • the magnetic body 4 has a higher magnetic permeability than the base material 2 and the protective layer (not shown).
  • the first main surface 41 is arranged so as to face an antenna (not shown) on the communication partner side. More specifically, the antenna device 1 uses the first main surface 41 side as a main communication surface.
  • the "main communication surface” is a surface which is mainly brought close to the partner coil conductor (not shown) of the partner antenna device when communicating with the partner. That is, the antenna device 1 mainly communicates with a communication partner closer to the first principal surface 21 than a communication partner closer to the second principal surface 42 of the magnetic body 4.
  • the first terminal electrode 5 is electrically connected to the first end 36 of the coil conductor 3, as shown in FIG. More specifically, the first terminal electrode 5 is electrically connected to the first end 36 of the coil conductor 3 via the first wiring portion 51. That is, the first end 36 of the coil conductor 3 is connected to one end of the first wiring portion 51, and the first terminal electrode 5 is connected to the other end of the first wiring portion 51.
  • the first terminal electrode 5 is provided in the coil opening 35 of the coil conductor 3. More specifically, it is provided in the second opening region 352 of the coil opening 35.
  • the second terminal electrode 6 is electrically connected to the second end 37 of the coil conductor 3. More specifically, the second terminal electrode 6 is electrically connected to the second end 37 of the coil conductor 3 via the second wiring portion 61. That is, the second end 37 of the coil conductor 3 is connected to one end of the second wiring portion 61, and the second terminal electrode 6 is connected to the other end of the second wiring portion 61.
  • the first terminal electrode 5 and the second terminal electrode 6 are located in a projecting region that does not overlap the magnetic body 4 in the first direction D1 in a plan view of the first main surface 41 of the magnetic body 4. More specifically, the first terminal electrode 5 and the second terminal electrode 6 are provided on the first major surface 21 of the protruding portion 25 corresponding to the protruding region 11 of the base material 2. The first terminal electrode 5 and the second terminal electrode 6 are integrally provided on the first main surface 21 of the base material 2 together with the coil conductor 3, the first wiring portion 51, and the second wiring portion 61.
  • the first terminal electrode 5 and the second terminal electrode 6 project in the first direction D1 with respect to the magnetic body 4 in the plan view of the first main surface 41 of the magnetic body 4, and do not overlap with the magnetic body 4. By being located in the protruding region 11, it is possible to improve the communication characteristic while stabilizing the communication characteristic at low cost.
  • a partner antenna device (not shown) that is a communication partner of the antenna device 1 is located above the antenna device 1 in FIG. 4B.
  • the counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3.
  • the magnetic flux ⁇ 1 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1. Due to the magnetic flux ⁇ 1 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux ⁇ 1 is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i1 flows through the coil conductor 3.
  • the line width ⁇ 1 of the first coil conductor portion 31 is large, the current i1 flowing through the coil conductor 3 is larger than when the line width of the first coil conductor portion 31 is thin. Thereby, the communication characteristics of the antenna device 1 can be improved.
  • the first terminal electrode 5 and the second terminal electrode 6 overlap the magnetic body 4 in the first direction D1 in a plan view of the first main surface 41 of the magnetic body 4. It is located in the protruding region 11 which does not become. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
  • the line width ⁇ 1 of the first coil conductor portion 31 is set to the second when the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side. It is thicker than the line width ⁇ 2 of the coil conductor portion 32. Thereby, the communication characteristics of the antenna device 1 can be further improved.
  • the protruding area 11 of the antenna device 1 is not limited to being provided in the position of FIG. 1 in the third direction D3.
  • the protruding region 11 may be provided at the left end in FIG. 1 or the right end in FIG. 1 in the third direction D3.
  • the protruding region 11 may be located inside the end portion of the main portion 24 of the base material 2 in the third direction D3. That is, the protruding region 11 has only to be located outside the end of the main portion 24 of the base material 2 in the third direction D3. Further, the protruding region 11 may be located at the center of the main portion 24 of the base material 2 in the third direction D3.
  • the antenna device 1 according to each of the above modifications also has the same effect as the antenna device 1 according to the first embodiment.
  • the antenna device 1a according to the second embodiment differs from the antenna device 1 according to the first embodiment (see FIG. 1) in that the antenna device 1a further includes a conductive member 7.
  • the same components as those of the antenna device 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • the antenna device 1a includes a base material 2, a coil conductor 3, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
  • the conductive member 7 faces the second main surface 42 of the magnetic body 4, as shown in FIGS. 5 to 7. This allows the magnetic flux to pass through the magnetic body 4 while avoiding the conductive member 7, so that the magnetic flux collecting effect can be improved.
  • the conductive member 7 is, for example, a plane conductor formed in a shape having a square main surface.
  • the material of the conductive member 7 is, for example, a metal such as aluminum, stainless steel, or copper.
  • the material of the conductive member 7 may be a single conductor or a plurality of conductors. Further, the conductive member 7 is not limited to a single conductor, and may be a conductor forming a part of another component (for example, a battery).
  • the conductive member 7 has a main surface 71, and is arranged so that the main surface 71 faces the coil conductor 3 and the magnetic body 4 in the second direction D2. In other words, the conductive member 7 is arranged so that at least a part thereof overlaps the coil conductor 3 and the magnetic body 4 in a plan view of the main surface 71 of the conductive member 7. More specifically, the conductive member 7 is arranged on the second main surface 42 side of the magnetic body 4 in the second direction D2. In other words, the conductive member 7 is arranged closer to the second main surface 42 than the first main surface 41 of the magnetic body 4 in the second direction D2.
  • the main surface 71 is a rectangular flat surface.
  • the dimension ratio of the dimension of the first direction D1 to the dimension of the second direction D2 is larger than 1, and the dimension ratio of the dimension of the third direction D3 to the dimension of the second direction D2 is larger than 1. .. That is, the conductive member 7 is a planar conductor in which the dimension in the first direction D1 and the dimension in the third direction D3 are longer than the dimension in the second direction D2.
  • the main surface 71 facing the coil conductor 3 and the magnetic body 4 is not limited to being a complete flat surface.
  • the main surface 71 can be said to be a flat surface even if there is unevenness smaller than the dimension of the conductive member 7 in the second direction D2 (thickness of the conductive member 7) or the dimension in the first direction D1.
  • all the main surfaces 71 are not limited to being flat. That is, the main surface 71 may be a flat surface at least in part.
  • a planar conductor having a curved surface may be used instead of the planar conductor.
  • the outer edge of the conductive member 7 is provided outside the outer edge of the coil conductor 3 in a plan view of the magnetic body 4. More specifically, the outer edge of the conductive member 7 is located outside the outer edge of the coil conductor 3 in the direction in which the first coil conductor portion 31 and the second coil conductor portion 32 are arranged, that is, in the first direction D1. There is. Similarly, in the direction orthogonal to the direction in which the first coil conductor portion 31 and the second coil conductor portion 32 are arranged, that is, the third direction D3, the outer edge of the conductive member 7 is located outside the outer edge of the coil conductor 3. doing.
  • a partner antenna device (not shown) that is a communication partner of the antenna device 1a is located above the antenna device 1a in FIG. 8B.
  • the counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3.
  • the magnetic flux ⁇ 2 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1a. Due to the magnetic flux ⁇ 2 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux ⁇ 2 is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i2 flows through the coil conductor 3.
  • the line width ⁇ 1 of the first coil conductor portion 31 is large, the current i2 flowing through the coil conductor 3 is larger than when the line width of the first coil conductor portion 31 is thin. Thereby, the communication characteristics of the antenna device 1a can be improved.
  • the magnetic flux ⁇ 2 from the partner antenna device is less likely to pass through the conductive member 7 side. It passes through the magnetic body 4 having a high magnetic permeability more intensively. As a result, the magnetic flux ⁇ 2 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i2 flowing through the coil conductor 3 becomes larger.
  • the conductive member 7 is provided so as to face the second main surface 42 of the magnetic body 4. As a result, the magnetic flux ⁇ 2 comes to pass through the magnetic body 4 while avoiding the conductive member 7, so that the magnetism collecting effect can be improved.
  • the antenna device 1b according to the third embodiment is such that the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b of the coil conductor 3b. (See FIG. 5).
  • the same components as those of the antenna device 1a according to the second embodiment are designated by the same reference numerals and the description thereof will be omitted.
  • the antenna device 1b includes a base material 2, a coil conductor 3b, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
  • the coil conductor 3b is provided on the base material 2 as in the second embodiment, as shown in FIGS. 9 to 11.
  • the coil conductor 3b has a coil opening 35b.
  • the coil conductor 3b is provided in the base material 2 in a spiral shape around the axis along the second direction D2, as in the second embodiment.
  • the material of the coil conductor 3 is, for example, copper or aluminum.
  • the coil conductor 3b has a first coil conductor portion 31b, a second coil conductor portion 32b, a plurality (two in the illustrated example) of third coil conductor portions 33b, and a fourth coil conductor portion 34b.
  • description of the same configuration and function as the coil conductor 3 of the second embodiment (see FIG. 5) is omitted.
  • the first coil conductor portion 31b is provided on the first main surface 41 side with respect to the magnetic body 4.
  • the second coil conductor portion 32 is provided on the second main surface 42 side with respect to the magnetic body 4. Then, in a plan view of the first main surface 41 of the magnetic body 4, the first coil conductor portion 31b and the second coil conductor portion 32b overlap the magnetic body 4.
  • Each of the plurality of third coil conductor portions 33b is provided between the first coil conductor portion 31b and the second coil conductor portion 32b, as in the second embodiment.
  • the first coil conductor portion 31b and the second coil conductor portion 32b are arranged side by side in the first direction D1 as in the second embodiment. However, in the main portion 24 of the base material 2, the second coil conductor portion 32b is provided on the side where the projecting portion 25 is provided, and the first coil is provided on the side opposite to the side where the projecting portion 25 is provided.
  • the conductor portion 31b is provided.
  • the fourth coil conductor portion 34b is inserted in the second coil conductor portion 32b.
  • the 4th coil conductor part 34b has the 1st part 341, the 2nd part 342, and the 3rd part 343 similarly to the 4th coil conductor part 34 of Embodiment 2 (refer FIG. 5).
  • the first portion 341 and the second portion 342 of the third embodiment extend from the second coil conductor portion 32b along the first direction D1.
  • the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b.
  • the first coil conductor portion 31b which is close to the antenna on the communication partner side and easily receives the magnetic flux from the communication partner side, can be utilized to the maximum as a portion where a current is generated.
  • the coil conductor 3b is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35b.
  • the fourth coil conductor portion 34b is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
  • the line width ⁇ 1 of the first coil conductor portion 31b is thicker than the line width ⁇ 2 of the second coil conductor portion 32b. More specifically, in a state where the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side, the line width ⁇ 1 of the first coil conductor portion 31b is equal to that of the second coil conductor portion 32b. It is thicker than the line width ⁇ 2. Thereby, the communication characteristics of the antenna device 1b can be further improved.
  • the coil opening 35 has a first opening area 351 and a second opening area 352, as in the second embodiment.
  • the second opening region 352 of the third embodiment is a region surrounded by the fourth coil conductor portion 34b.
  • a partner antenna device (not shown) that is a communication partner of the antenna device 1b is located above the antenna device 1b in FIG. 12B.
  • the counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3b.
  • the magnetic flux ⁇ 3 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1b. Due to the magnetic flux ⁇ 3 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux ⁇ 3 is generated in the first coil conductor portion 31b of the coil conductor 3b. As a result, the current i3 flows through the coil conductor 3b.
  • the line width ⁇ 1 of the first coil conductor portion 31b is large, the current i3 flowing through the coil conductor 3b is larger than when the line width of the first coil conductor portion 31b is thin. Thereby, the communication characteristics of the antenna device 1b can be improved.
  • the magnetic flux ⁇ 3 from the counterpart antenna device is less likely to pass through the conductive member 7 side, and the magnetic permeability is high. It passes through the magnetic body 4 more intensively. As a result, the magnetic flux ⁇ 3 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31b of the coil conductor 3b. As a result, the current i3 flowing through the coil conductor 3b becomes larger.
  • the fourth coil conductor portion 34b is inserted into the second coil conductor portion 32b, and the first coil conductor portion 31b having a larger line width than the second coil conductor portion 32b has The fourth coil conductor portion 34b is not inserted.
  • the first coil conductor portion 31b becomes larger than that in the case where the fourth coil conductor portion 34b is inserted into the first coil conductor portion 31b. Electricity is generated.
  • the current i3 flowing through the coil conductor 3b becomes larger than that in the case where the fourth coil conductor portion 34b is inserted in the first coil conductor portion 31b.
  • the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b.
  • the first coil conductor portion 31b which is close to the antenna on the communication partner side and is likely to receive the magnetic flux ⁇ 3 from the communication partner side, can be utilized to the maximum as the portion where the current i3 is generated.
  • the antenna device 1b may not include the conductive member 7.
  • the antenna device 1b according to each of the above modifications also has the same effect as the antenna device 1b according to the third embodiment.
  • the antenna device 1c according to the fourth embodiment is different from the antenna device 1b according to the third embodiment (see FIG. 9) in that the coil conductor 3c is folded as shown in FIG.
  • the same components as those of the antenna device 1b according to the third embodiment are designated by the same reference numerals and the description thereof will be omitted.
  • the antenna device 1c includes a base material 2c, a coil conductor 3c, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
  • the base material 2c is formed in a plate shape or a sheet shape, and has a first main surface 21c and a second main surface 22c facing each other.
  • the width between the outer peripheral edge and the inner peripheral edge of the base material 2c is large enough to provide the coil conductor 3c.
  • the description of the same configuration and function as the base material 2 of the third embodiment is omitted.
  • the base material 2c has a rectangular main portion 24c and a protruding portion 25c protruding from a part of the main portion 24c.
  • the main portion 24c and the protruding portion 25c are integrally formed.
  • the main portion 24c has a rectangular shape in a plan view from the thickness direction (second direction D2) of the base material 2c.
  • the protruding portion 25c is provided so as to protrude in the first direction D1 from one side of the main portion 24c along the third direction D3.
  • the area where the protruding portion 25c is provided in the antenna device 1c is the protruding area 11 of the antenna device 1c.
  • the coil conductor 3c includes a first coil conductor portion 31c, a second coil conductor portion 32c, a plurality of (two in the illustrated example) third coil conductor portions 33c, and a fourth coil conductor portion 33c. And a coil conductor portion 34c.
  • the coil conductor 3c has a coil opening 35c.
  • the description of the same configuration and function as those of the coil conductor 3b (see FIG. 9) of the third embodiment will be omitted.
  • the base material 2c is folded along a fold line L1 (see FIG. 15) along the third direction D3 with the coil conductor 3c provided on the first major surface 21c. ..
  • the first coil conductor portion 31c is provided on the first main surface 41 side of the magnetic body 4
  • the second coil conductor portion 32c is provided on the second main surface 42 side of the magnetic body 4. It will be in the state of being.
  • a partner antenna device (not shown) that is a communication partner of the antenna device 1c is located above the antenna device 1c in FIG. 16B.
  • the counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3c.
  • the magnetic flux ⁇ 4 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1c. Due to the magnetic flux ⁇ 4 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux ⁇ 4 is generated in the first coil conductor portion 31c of the coil conductor 3c. As a result, the current i4 flows through the coil conductor 3c.
  • the line width ⁇ 1 of the first coil conductor portion 31c is large, the current i4 flowing through the coil conductor 3c is larger than when the line width of the first coil conductor portion 31c is thin. Thereby, the communication characteristics of the antenna device 1c can be improved.
  • the magnetic flux ⁇ 4 from the partner antenna device is less likely to pass through the conductive member 7 side, and the magnetic permeability is high. It passes through the magnetic body 4 more intensively. As a result, the magnetic flux ⁇ 4 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31c of the coil conductor 3c. As a result, the current i4 flowing through the coil conductor 3c becomes larger.
  • the fourth coil conductor portion 34c is inserted in the second coil conductor portion 32c, and the fourth coil conductor portion 31c having a line width larger than that of the second coil conductor portion 32c has the fourth coil conductor portion 34c.
  • the coil conductor portion 34c is not inserted.
  • the first coil conductor portion 31c becomes larger than in the case where the fourth coil conductor portion 34c is inserted into the first coil conductor portion 31c. Electricity is generated.
  • the current i4 flowing through the coil conductor 3c becomes larger than when the fourth coil conductor portion 34c is inserted in the first coil conductor portion 31c.
  • the antenna device 1c according to the fourth embodiment does not require the step of inserting the magnetic body 4 into the coil opening 35c of the coil conductor 3c, and thus the antenna device 1c can be easily manufactured.
  • the antenna device 1c may not include the conductive member 7.
  • the antenna device 1c according to each of the above modifications also has the same effect as the antenna device 1c according to the fourth embodiment.
  • a recess 43 is formed in the magnetic body 4d so that the first terminal electrode 5 and the second terminal electrode 6 are exposed from the magnetic body 4d. Therefore, it is different from the antenna device 1 (see FIG. 1) according to the first embodiment.
  • the same components as those of the antenna device 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
  • the antenna device 1d includes a base material 2d, a coil conductor 3d, a magnetic body 4d, a first terminal electrode 5, and a second terminal electrode 6.
  • the base material 2d is formed in a square plate shape or a square sheet shape as shown in FIG. Unlike the base material 2 (see FIG. 1) of the first embodiment, the base material 2d does not have the protrusion 25 (see FIG. 1).
  • the material of the base material 2d is an electrically insulating material such as resin as in the base material 2 of the first embodiment.
  • the coil conductor 3d is spirally provided on the base material 2d as shown in FIG.
  • the coil conductor 3d has a coil opening 35.
  • the material of the coil conductor 3 is, for example, copper or aluminum.
  • the coil conductor 3d has a first coil conductor portion 31, a second coil conductor portion 32, two third coil conductor portions 33, and a fourth coil conductor portion 34d.
  • the fourth coil conductor portion 34d is inserted in the first coil conductor portion 31.
  • the fourth coil conductor portion 34d is provided along the direction orthogonal to the first coil conductor portion 31.
  • the fourth coil conductor portion 34d has a smaller protrusion amount than the fourth coil conductor portion 34 (see FIG. 1) of the first embodiment. Part of the fourth coil conductor portion 34d overlaps the magnetic body 4d, and the rest of the fourth coil conductor portion 34d does not overlap the magnetic body 4d.
  • the coil conductor 3d is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35.
  • the fourth coil conductor portion 34d is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
  • the magnetic body 4d has a rectangular plate shape or a rectangular sheet shape, and has a recess 43.
  • the recess 43 is formed so that the first terminal electrode 5 and the second terminal electrode 6 are exposed.
  • the material of the magnetic body 4d is a ferromagnetic material such as ferrite, like the magnetic body 4 of the first embodiment (see FIG. 1).
  • the material of the magnetic body 4d is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet.
  • the recess 43 is formed in the magnetic body 4d so that the first terminal electrode 5 and the second terminal electrode 6 are exposed from the magnetic body 4d.
  • the first terminal electrode 5 and the second terminal electrode 6 can be brought into contact with the spring pin (pogo pin) connected to the printed wiring board or the like.
  • the antenna device 1e according to the sixth embodiment is different in that the small protrusion 25e is formed on the base material 2e and the recess 43 is formed on the magnetic body 4e. 1 is different from the antenna device 1 (see FIG. 1).
  • the same components as those of the antenna device 1 according to the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.
  • the antenna device 1e includes a base material 2e, a coil conductor 3e, a magnetic body 4e, a first terminal electrode 5, and a second terminal electrode 6.
  • the base material 2e is formed in a plate shape or a sheet shape as shown in FIG.
  • the base material 2e has a protrusion 25e, like the base material 2 of the first embodiment (see FIG. 1). However, the protrusion 25e has a smaller protrusion amount than the protrusion 25.
  • the material of the base material 2e is an electrically insulating material such as resin as in the base material 2 of the first embodiment.
  • the coil conductor 3e is provided in a spiral shape on the base material 2e as shown in FIG.
  • the coil conductor 3e has a coil opening 35e.
  • the material of the coil conductor 3 is, for example, copper or aluminum.
  • the coil conductor 3e has a first coil conductor portion 31e, a second coil conductor portion 32e, two third coil conductor portions 33e, and a fourth coil conductor portion 34e.
  • the fourth coil conductor portion 34e is inserted in the first coil conductor portion 31e.
  • the fourth coil conductor portion 34e is provided along the direction orthogonal to the first coil conductor portion 31e.
  • the fourth coil conductor portion 34e has a smaller amount of protrusion than the fourth coil conductor portion 34 (see FIG. 1) of the first embodiment. Part of the fourth coil conductor portion 34e overlaps the magnetic body 4e, and the rest of the fourth coil conductor portion 34e does not overlap the magnetic body 4e.
  • the coil conductor 3e is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35e.
  • the fourth coil conductor portion 34e is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
  • the magnetic body 4e has a rectangular plate shape or a rectangular sheet shape, and has a recess 43e.
  • the recess 43e has a smaller depth than the recess 43 of the fifth embodiment (see FIG. 17).
  • the recess 43e is formed so that the first terminal electrode 5 and the second terminal electrode 6 are exposed.
  • the material of the magnetic body 4e is a ferromagnetic material such as ferrite, like the magnetic body 4 of the first embodiment (see FIG. 1).
  • the material of the magnetic body 4e is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet.
  • the recess 43e is formed in the magnetic body 4e so as to expose the first terminal electrode 5 and the second terminal electrode 6.
  • An electronic device 8 according to the seventh embodiment includes an antenna device 1b, a control unit 81, a printed wiring board 82, a battery 83, and a housing 84, as shown in FIG. ..
  • the antenna device 1b according to the seventh embodiment has the same configuration and function as the antenna device 1b according to the third embodiment.
  • the electronic device 8 is, for example, a mobile terminal such as a smartphone, a wearable terminal such as a smart watch, headphones, or a hearing aid.
  • FIG. 19 shows a smartphone as the electronic device 8.
  • the control unit 81 includes a plurality of circuit elements 86 mounted on the surface of the printed wiring board 82, and controls the antenna device 1b.
  • the battery 83 is a power source for driving the electronic device 8.
  • the housing 84 has a rectangular parallelepiped shape, and houses the antenna device 1b, the control unit 81, the printed wiring board 82, and the battery 83. That is, the housing 84 is provided with the antenna device 1b.
  • the antenna device 1b is arranged such that the direction in which the first coil conductor portion 31b and the second coil conductor portion 32 of the coil conductor 3b are aligned is along the longitudinal direction D4 of the housing 84. It is arranged in the housing 84.
  • the first coil conductor portion 31b and the second coil conductor portion 32b of the coil conductor 3b of the antenna device 1b are conductive members in a plan view from the thickness direction of the housing 84. It is provided so as to overlap with a certain shield case 85.
  • the antenna device 1b is attached to the shield case 85 or the inner surface of the housing 84 facing the shield case 85 with an adhesive, for example.
  • the conductive member 7 of the antenna device 1 b becomes the shield case 85 when the first coil conductor portion 31 b and the second coil conductor portion 32 b are provided so as to overlap with the shield case 85.
  • the first terminal electrode 5 and the second terminal electrode 6 are the same as the magnetic body 4 in the first direction D1 in the plan view of the first main surface 41. It is located in the projecting area 11 which does not overlap. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
  • the antenna device 1b may be arranged in the housing 84 along the direction D5.
  • the conductive member 7 of the electronic device 8 may be the ground portion of the printed wiring board 82 instead of the shield case 85, or the battery case 831 of the battery 83. May be.
  • the conductive member 7 is the ground portion of the printed wiring board 82
  • the first coil conductor portion 31b and the second coil conductor portion 32b are the ground portion of the printed wiring board 82 in a plan view from the thickness direction of the housing 84. It is provided to overlap with.
  • the conductive member 7 is the battery case 831
  • the first coil conductor portion 31b and the second coil conductor portion 32b are provided so as to overlap the battery case 831 in a plan view from the thickness direction of the housing 84. ..
  • the electronic device 8 includes an antenna device 1 according to the first embodiment (see FIG. 1), an antenna device 1a according to the second embodiment (see FIG. 5), or an antenna device 1c according to the fourth embodiment. (See FIG. 13).
  • the electronic device 8 may include the antenna device 1d according to the fifth embodiment (see FIG. 17) or the antenna device 1e according to the sixth embodiment (see FIG. 18) instead of the antenna device 1b.
  • the electronic device 8 according to each of the above modifications also has the same effect as the electronic device 8 according to the seventh embodiment.
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), It comprises a first terminal electrode (5) and a second terminal electrode (6).
  • the coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e).
  • the coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e).
  • the magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42).
  • the first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e).
  • the second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e).
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other.
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e).
  • the first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first terminal electrode (5) and the second terminal electrode (6) are located in a region (protruding region 11) that does not overlap the magnetic body (4) in a plan view of the first main surface (41).
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the first aspect, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), It comprises a first terminal electrode (5) and a second terminal electrode (6).
  • the coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e).
  • the coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e).
  • the magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42).
  • the first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e).
  • the second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e).
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other.
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e).
  • the coil conductors (3; 3b; 3c; 3d; 3e) have convex portions (fourth coil conductor portions 34; 34b; 34c; 34d; 34e) in a plan view of the first main surface (41).
  • the electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) and in the portion surrounded by the convex shape portion: the first terminal electrode (5) and the second terminal electrode (6). Is located in a region that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41).
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the second aspect, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
  • the first main surface (41) faces the antenna on the communication partner side. It is arranged.
  • the line width ( ⁇ 1) of the first coil conductor portion (31; 31b; 31c; 31e) is thicker than the line width ( ⁇ 2) of the second coil conductor portion (32; 32b; 32c; 32e).
  • the communication characteristics of the antenna device (1; 1a; 1b; 1c; 1d; 1e) can be further improved. ..
  • the area is a protruding area (11).
  • the projecting region (11) projects in the first direction (D1) with respect to the magnetic body (4) in a plan view of the first main surface (21; 21c).
  • the first main surface (41) is arranged so as to face the antenna on the communication partner side.
  • the projecting region (11) projects so as to be orthogonal to the second coil conductor portions (32b; 32c).
  • the first coil conductor portion (31b; 31c) which is close to the antenna on the communication partner side and easily receives the magnetic flux ( ⁇ 3; ⁇ 4) from the communication partner side is provided. , As the part where the current (i3; i4) is generated, it can be utilized to the maximum extent.
  • the antenna device (1a; 1b; 1c) according to the sixth aspect further includes a conductive member (7) according to any one of the first to fifth aspects.
  • the conductive member (7) faces the second major surface (42).
  • the magnetic flux ( ⁇ 2; ⁇ 3; ⁇ 4) comes to pass through the magnetic body (4) while avoiding the conductive member (7).
  • the effect can be improved.
  • the electronic device (8) includes an antenna device (1; 1a; 1b; 1c; 1d; 1e) and a housing (84).
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), and a first terminal electrode (5). And a second terminal electrode (6).
  • the coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e).
  • the coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e).
  • the magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42).
  • the first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e).
  • the second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e).
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other.
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e).
  • the first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first terminal electrode (5) and the second terminal electrode (6) are located in a region (protrusion region 11) that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41).
  • the housing (84) is provided with the antenna device (1; 1a; 1b; 1c; 1d; 1e).
  • the first terminal electrode (5) and the second terminal electrode (6) are The first principal surface (41) is located in a region (protruding region 11) that does not overlap the magnetic body (4) in the first direction (D1) in a plan view. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
  • the electronic device (8) includes an antenna device (1; 1a; 1b; 1c; 1d; 1e) and a housing (84).
  • the antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), and a first terminal electrode (5). And a second terminal electrode (6).
  • the coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e).
  • the coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e).
  • the magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42).
  • the first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e).
  • the first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e).
  • the second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e).
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other.
  • the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e).
  • the coil conductor (3; 3b; 3c; 3d; 3e) has a convex portion (fourth coil conductor portion 34) in a plan view of the first main surface (41).
  • the first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) and in the portion surrounded by the convex portion.
  • the first terminal electrode (5) and the second terminal electrode (6) are located in a region that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41).
  • the housing (84) is provided with an antenna device (1; 1a; 1b; 1c; 1d; 1e).

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Abstract

The purpose of the present invention is to improve communication characteristics while achieving low cost and stable communication characteristics. An antenna device (1) comprises a coil conductor (3), a magnetic body (4), a first terminal electrode (5), and a second terminal electrode (6). The coil conductor (3) includes a first coil conductor portion (31) and a second coil conductor portion (32) adjacent to the first direction (D1). The first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (a first end (36) and a second end (37)) of the coil conductor (3). The first coil conductor portion (31) is provided on a first major surface (41) side with respect to the magnetic body (4). The second coil conductor portion (32) is provided on a second major surface (42) side with respect to the magnetic body (4). The first terminal electrode (5) is formed in a coil opening (35) of the coil conductor (3). The first terminal electrode (5) and the second terminal electrode (6) are positioned in a region (11) that does not overlap with the magnetic body (4) in a plan view of the first major surface (41).

Description

アンテナ装置及び電子機器Antenna device and electronic device
　本発明は、一般にアンテナ装置及び電子機器に関し、より詳細には、コイル導体と磁性体とを備えるアンテナ装置、及び、このアンテナ装置を備える電子機器に関する。 The present invention generally relates to an antenna device and an electronic device, and more specifically, to an antenna device including a coil conductor and a magnetic body, and an electronic device including the antenna device.
　従来、コイルアンテナの開口に磁性体が挿入されているアンテナ装置が知られている（例えば、特許文献１参照）。 Conventionally, an antenna device in which a magnetic material is inserted into the opening of a coil antenna is known (for example, refer to Patent Document 1).
　特許文献１に記載された従来のアンテナ装置は、コイルアンテナと、磁性体と、２つの端子電極とを備える。２つの端子電極は、例えば、スプリングピン（ポゴピン）で圧力をかけながら導通を図ることがある。この場合、各端子電極と磁性体とが重なると、磁性体に圧力が加わり、磁性体が割れることがあるため、通信特性が安定しないことがある。 The conventional antenna device described in Patent Document 1 includes a coil antenna, a magnetic body, and two terminal electrodes. The two terminal electrodes may be brought into conduction while applying pressure with a spring pin (pogo pin), for example. In this case, when each terminal electrode and the magnetic body overlap, pressure is applied to the magnetic body and the magnetic body may be broken, so that the communication characteristics may not be stable.
　上記の問題を解決するためには、２つの端子電極を磁性体と重ならない位置まで引き出す必要がある。特許文献１には、基板の両面にコイル導体が形成されており、基板の一面に端子電極が形成されている構成が開示されている（特許文献１の図９参照）。さらに、特許文献１には、コイル導体の開口内に磁性体と重ならない領域が設けられており、上記領域に端子電極が形成されている構成が開示されている（特許文献１の図１２参照）。 To solve the above problem, it is necessary to pull out the two terminal electrodes to a position where they do not overlap with the magnetic material. Patent Document 1 discloses a configuration in which coil conductors are formed on both surfaces of a substrate and terminal electrodes are formed on one surface of the substrate (see FIG. 9 of Patent Document 1). Further, Patent Document 1 discloses a configuration in which a region that does not overlap with a magnetic material is provided in the opening of the coil conductor, and a terminal electrode is formed in the region (see FIG. 12 of Patent Document 1). ).
特開２０１２－６０６２６号公報JP 2012-60626 A
　しかしながら、特許文献１に記載された従来のアンテナ装置では、基板の両面に導体が形成されているため、コストが高くなり、かつ、アンテナ装置全体が厚くなる。また、磁性体の幅が狭くなるため、実質的な開口が小さくなり、通信特性の向上が難しい。つまり、特許文献１に記載されたアンテナ装置では、コストが高くなったり、通信特性が劣化したりするという問題があった。 However, in the conventional antenna device described in Patent Document 1, since the conductors are formed on both surfaces of the substrate, the cost becomes high and the entire antenna device becomes thick. Moreover, since the width of the magnetic body is narrowed, the aperture is substantially reduced, and it is difficult to improve communication characteristics. That is, the antenna device described in Patent Document 1 has problems that the cost is high and the communication characteristics are deteriorated.
　本発明は上記の点に鑑みてなされた発明であり、本発明の目的は、低コストかつ通信特性を安定させつつ、通信特性を向上させることができるアンテナ装置及び電子機器を提供することにある。 The present invention has been made in view of the above points, and an object of the present invention is to provide an antenna device and an electronic device that can improve communication characteristics while stabilizing the communication characteristics at low cost. ..
　本発明の一態様に係るアンテナ装置は、コイル導体と、磁性体と、第１端子電極及び第２端子電極とを備える。前記コイル導体は、第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含む。前記コイル導体は、コイル開口を有する。前記磁性体は、第１主面及び第２主面を有する。前記第１端子電極及び前記第２端子電極は、前記コイル導体の両端に電気的に接続されている。前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられている。前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられている。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならない。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なる。前記第１端子電極は、前記コイル開口内に設けられている。前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する。 The antenna device according to one aspect of the present invention includes a coil conductor, a magnetic body, and a first terminal electrode and a second terminal electrode. The coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction. The coil conductor has a coil opening. The magnetic body has a first main surface and a second main surface. The first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor. The first coil conductor portion is provided on the first main surface side with respect to the magnetic body. The second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body. The first terminal electrode is provided in the coil opening. The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
　本発明の一態様に係るアンテナ装置は、コイル導体と、磁性体と、第１端子電極及び第２端子電極とを備える。前記コイル導体は、第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含む。前記コイル導体は、コイル開口を有する。前記磁性体は、第１主面及び第２主面を有する。前記第１端子電極及び前記第２端子電極は、前記コイル導体の両端に電気的に接続されている。前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられている。前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられている。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならない。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なる。前記コイル導体は、前記第１主面の平面視で凸形状部を有する。前記第１端子電極は、前記コイル開口内であって前記凸形状部で囲まれた部分に設けられている。前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する。 The antenna device according to one aspect of the present invention includes a coil conductor, a magnetic body, and a first terminal electrode and a second terminal electrode. The coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction. The coil conductor has a coil opening. The magnetic body has a first main surface and a second main surface. The first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor. The first coil conductor portion is provided on the first main surface side with respect to the magnetic body. The second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body. The coil conductor has a convex portion in a plan view of the first main surface. The first terminal electrode is provided inside the coil opening and in a portion surrounded by the convex portion. The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface.
　本発明の一態様に係る電子機器は、アンテナ装置と、筐体とを備える。前記アンテナ装置は、コイル導体と、磁性体と、第１端子電極及び第２端子電極とを備える。前記コイル導体は、第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含む。前記コイル導体は、コイル開口を有する。前記磁性体は、第１主面及び第２主面を有する。前記第１端子電極及び前記第２端子電極は、前記コイル導体の両端に電気的に接続されている。前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられている。前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられている。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならない。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なる。前記第１端子電極は、前記コイル開口内に設けられている。前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する。前記筐体には、前記アンテナ装置が設けられている。 The electronic device according to one aspect of the present invention includes an antenna device and a housing. The antenna device includes a coil conductor, a magnetic body, a first terminal electrode and a second terminal electrode. The coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction. The coil conductor has a coil opening. The magnetic body has a first main surface and a second main surface. The first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor. The first coil conductor portion is provided on the first main surface side with respect to the magnetic body. The second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body. The first terminal electrode is provided in the coil opening. The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface. The antenna device is provided in the housing.
　本発明の一態様に係る電子機器は、アンテナ装置と、筐体とを備える。前記アンテナ装置は、コイル導体と、磁性体と、第１端子電極及び第２端子電極とを備える。前記コイル導体は、第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含む。前記コイル導体は、コイル開口を有する。前記磁性体は、第１主面及び第２主面を有する。前記第１端子電極及び前記第２端子電極は、前記コイル導体の両端に電気的に接続されている。前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられている。前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられている。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならない。前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なる。前記コイル導体は、前記第１主面の平面視で凸形状部を有する。前記第１端子電極は、前記コイル開口内であって前記凸形状部で囲まれた部分に設けられている。前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する。前記筐体には、前記アンテナ装置が設けられている。 The electronic device according to one aspect of the present invention includes an antenna device and a housing. The antenna device includes a coil conductor, a magnetic body, a first terminal electrode and a second terminal electrode. The coil conductor includes a first coil conductor portion and a second coil conductor portion which are adjacent to each other in the first direction. The coil conductor has a coil opening. The magnetic body has a first main surface and a second main surface. The first terminal electrode and the second terminal electrode are electrically connected to both ends of the coil conductor. The first coil conductor portion is provided on the first main surface side with respect to the magnetic body. The second coil conductor portion is provided on the second main surface side with respect to the magnetic body. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other. In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body. The coil conductor has a convex portion in a plan view of the first main surface. The first terminal electrode is provided inside the coil opening and in a portion surrounded by the convex portion. The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface. The antenna device is provided in the housing.
　本発明の上記態様に係るアンテナ装置及び電子機器によれば、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 According to the antenna device and the electronic device according to the above aspects of the present invention, it is possible to improve communication characteristics while stabilizing the communication characteristics at low cost.
図１は、実施形態１に係るアンテナ装置の平面図である。FIG. 1 is a plan view of the antenna device according to the first embodiment. 図２は、同上のアンテナ装置における図１のＡ１－Ａ１線断面図である。FIG. 2 is a cross-sectional view of the antenna device of the above, taken along the line A1-A1 of FIG. 図３は、同上のアンテナ装置の分解図である。FIG. 3 is an exploded view of the above antenna device. 図４Ａ及び図４Ｂは、同上のアンテナ装置における磁束の流れを説明するための概略図である。4A and 4B are schematic diagrams for explaining the flow of magnetic flux in the above antenna device. 図５は、実施形態２に係るアンテナ装置の平面図である。FIG. 5 is a plan view of the antenna device according to the second embodiment. 図６は、同上のアンテナ装置における図５のＡ２－Ａ２線断面図である。FIG. 6 is a sectional view taken along the line A2-A2 of FIG. 5 in the antenna device of the above. 図７は、同上のアンテナ装置の分解図である。FIG. 7 is an exploded view of the above antenna device. 図８Ａ及び図８Ｂは、同上のアンテナ装置における磁束の流れを説明するための概略図である。8A and 8B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above. 図９は、実施形態３に係るアンテナ装置の平面図である。FIG. 9 is a plan view of the antenna device according to the third embodiment. 図１０は、同上のアンテナ装置における図９のＡ３－Ａ３線断面図である。FIG. 10 is a sectional view taken along the line A3-A3 of FIG. 9 in the antenna device of the above. 図１１は、同上のアンテナ装置の分解図である。FIG. 11 is an exploded view of the above antenna device. 図１２Ａ及び図１２Ｂは、同上のアンテナ装置における磁束の流れを説明するための概略図である。12A and 12B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above. 図１３は、実施形態４に係るアンテナ装置の平面図である。FIG. 13 is a plan view of the antenna device according to the fourth embodiment. 図１４は、同上のアンテナ装置における図１３のＡ４－Ａ４線断面図である。FIG. 14 is a cross-sectional view taken along the line A4-A4 of FIG. 13 in the antenna device of the above. 図１５は、同上のアンテナ装置の分解図である。FIG. 15 is an exploded view of the above antenna device. 図１６Ａ及び図１６Ｂは、同上のアンテナ装置における磁束の流れを説明するための概略図である。16A and 16B are schematic diagrams for explaining the flow of magnetic flux in the antenna device of the above. 図１７は、実施形態５に係るアンテナ装置の平面図である。FIG. 17 is a plan view of the antenna device according to the fifth embodiment. 図１８は、実施形態６に係るアンテナ装置の平面図である。FIG. 18 is a plan view of the antenna device according to the sixth embodiment. 図１９は、実施形態７に係る電子機器の概略構成図である。FIG. 19 is a schematic configuration diagram of an electronic device according to the seventh embodiment.
　以下、実施形態１～６に係るアンテナ装置及び実施形態７に係る電子機器について、図面を参照して説明する。下記の実施形態等において参照する図１～図１９は、模式的な図であり、図中の各構成要素の大きさや厚さそれぞれの比が、必ずしも実際の寸法比を反映しているとは限らない。 Hereinafter, the antenna device according to the first to sixth embodiments and the electronic device according to the seventh embodiment will be described with reference to the drawings. FIGS. 1 to 19 referred to in the following embodiments and the like are schematic views, and the ratio of the size and thickness of each constituent element in the drawings does not necessarily reflect the actual dimensional ratio. Not exclusively.
　各実施形態に示す「アンテナ装置」は、通信相手である外部機器のアンテナ装置と磁界結合することにより無線伝送を行うアンテナ装置である。ここで、本明細書において、「無線伝送」は、近接無線通信と無線給電（「無線充電」を含む）との両方を含む概念で用いられる。アンテナ装置は磁界結合による無線伝送を行うため、アンテナ装置の電流経路の長さ、つまり、後述のコイル導体の線路長は使用する周波数における波長λに比べて十分に小さく、λ／１０以下である。したがって、使用周波数帯においては電磁波の放射効率は低い。なお、ここでいう波長λは、導体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を示す。コイル導体の両端は、給電回路に接続され、アンテナ装置の電流経路つまりコイル導体に沿って、ほぼ一様な大きさの電流が流れる。 The “antenna device” shown in each embodiment is an antenna device that performs wireless transmission by magnetically coupling with an antenna device of an external device that is a communication partner. Here, in this specification, “wireless transmission” is used as a concept including both near field communication and wireless power supply (including “wireless charging”). Since the antenna device performs wireless transmission by magnetic field coupling, the length of the current path of the antenna device, that is, the line length of the coil conductor described later is sufficiently smaller than the wavelength λ at the frequency used, and is λ/10 or less. .. Therefore, the radiation efficiency of electromagnetic waves is low in the used frequency band. The wavelength λ mentioned here indicates an effective wavelength in consideration of the wavelength shortening effect due to the dielectric properties and magnetic permeability of the base material on which the conductor is formed. Both ends of the coil conductor are connected to a power supply circuit, and a current of substantially uniform magnitude flows along the current path of the antenna device, that is, the coil conductor.
　各実施形態に示す「アンテナ装置」に用いられる近接無線通信としては、例えばＮＦＣ（Near Field Communication）がある。「アンテナ装置」に用いられる無線給電の方式としては、例えば、電磁誘導方式及び磁界共鳴方式のような磁界結合方式がある。電磁誘導方式の無線給電規格としては、例えばＷＰＣ（Wireless Power Consortium）の策定する
規格「Ｑｉ（登録商標）」がある。磁界共鳴方式の無線給電規格としては、例えばAirFuel（登録商標） Allianceの策定する規格「AirFuel Resonant」がある。 NFC (Near Field Communication) is an example of near field communication used in the "antenna device" shown in each embodiment. The wireless power feeding method used in the "antenna device" includes, for example, a magnetic field coupling method such as an electromagnetic induction method and a magnetic field resonance method. As an electromagnetic induction type wireless power feeding standard, for example, there is a standard “Qi (registered trademark)” established by WPC (Wireless Power Consortium). As a wireless power feeding standard of the magnetic field resonance method, for example, there is a standard “AirFuel Resonant” established by the AirFuel (registered trademark) Alliance.
　以下、各実施形態に示す「アンテナ装置」は、近接無線通信に用いられるものを例として説明する。 Hereinafter, the “antenna device” shown in each embodiment will be described as an example of one used for close proximity wireless communication.
　（実施形態１）
　（１）アンテナ装置
　実施形態１に係るアンテナ装置１の全体構成について、図面を参照して説明する。 (Embodiment 1)
(1) Antenna Device The overall configuration of the antenna device 1 according to the first embodiment will be described with reference to the drawings.
　アンテナ装置１は、図１～図３に示すように、基材２と、コイル導体３と、磁性体４と、第１端子電極５と、第２端子電極６とを備える。また、アンテナ装置１は、保護層（図示せず）を更に備える。 As shown in FIGS. 1 to 3, the antenna device 1 includes a base material 2, a coil conductor 3, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. The antenna device 1 further includes a protective layer (not shown).
　アンテナ装置１は、例えば、スマートフォン等の携帯電話、又は、スマートウォッチ等のウェアラブル端末に用いられる。あるいは、アンテナ装置１は、例えば、ヘッドフォン又は補聴器に用いられる。 The antenna device 1 is used for a mobile phone such as a smartphone or a wearable terminal such as a smart watch, for example. Alternatively, the antenna device 1 is used, for example, in headphones or a hearing aid.
　（２）アンテナ装置の各構成要素
　以下、アンテナ装置１の各構成要素について、図面を参照して説明する。 (2) Each Component of Antenna Device Hereinafter, each component of the antenna device 1 will be described with reference to the drawings.
　（２．１）基材
　基材２は、図１～図３に示すように、板状又はシート状に形成されており、互いに対向する第１主面２１及び第２主面２２を有する。基材２は、基材２の厚さ方向（第２方向Ｄ２）に貫通する貫通孔２３を有する。基材２における外周縁と内周縁との間の幅は、コイル導体３が設けられるのに十分な大きさである。 (2.1) Base Material As shown in FIGS. 1 to 3, the base material 2 is formed in a plate shape or a sheet shape, and has a first main surface 21 and a second main surface 22 that face each other. The base material 2 has a through hole 23 penetrating in the thickness direction of the base material 2 (second direction D2). The width between the outer peripheral edge and the inner peripheral edge of the base material 2 is large enough to provide the coil conductor 3.
　基材２の材料は、樹脂などの電気絶縁材料である。基材２に用いられる電気絶縁材料としては、例えば、ポリイミド、ＰＥＴ（Poly Ethylene Terephthalate：ポリエチレンテレフタレート）又は液晶ポリマー（Liquid Crystal Polymer：ＬＣＰ）がある。 The material of the base material 2 is an electrically insulating material such as resin. The electrically insulating material used for the base material 2 is, for example, polyimide, PET (Poly Ethylene Terephthalate), or liquid crystal polymer (Liquid Crystal Polymer: LCP).
　基材２は、長方形状の主部２４と、主部２４の一部から突出する突出部２５とを有する。主部２４と突出部２５は、一体に形成されている。主部２４は、基材２の厚さ方向（第２方向Ｄ２）からの平面視で長方形の環状である。 The base material 2 has a rectangular main part 24 and a protruding part 25 protruding from a part of the main part 24. The main portion 24 and the protruding portion 25 are integrally formed. The main portion 24 has a rectangular ring shape in a plan view from the thickness direction (second direction D2) of the base material 2.
　突出部２５は、主部２４における第３方向Ｄ３に沿った一辺から第１方向Ｄ１に突出して設けられている。本明細書では、第３方向Ｄ３は、第１方向Ｄ１及び第２方向Ｄ２の両方と直交する方向である。 The projecting portion 25 is provided so as to project in the first direction D1 from one side of the main portion 24 along the third direction D3. In the present specification, the third direction D3 is a direction orthogonal to both the first direction D1 and the second direction D2.
　ここで、突出部２５は、第３方向Ｄ３において主部２４の一辺の中心よりも端部側の部分から第１方向Ｄ１に突出している。図３の例では、突出部２５は、主部２４の一辺において中心よりも左側から突出している。これにより、突出部２５が主部２４の一辺の中心から突出する場合に比べて、１枚のシートからの基材２の取り数を増やすことができる。 Here, the projecting portion 25 projects in the first direction D1 from a portion closer to the end than the center of one side of the main portion 24 in the third direction D3. In the example of FIG. 3, the projecting portion 25 projects from the left side of the center of one side of the main portion 24. This makes it possible to increase the number of substrates 2 to be taken from one sheet, as compared with the case where the projecting portion 25 projects from the center of one side of the main portion 24.
　（２．２）コイル導体
　コイル導体３は、図１～図３に示すように、基材２に設けられている。より詳細には、コイル導体３は、基材２の第１主面２１に設けられている。例えば、エッチング又は印刷により、銅膜又はアルミニウム膜が基材２の第１主面２１上に形成されることによって、コイル導体３が基材２の第１主面２１に設けられる。なお、コイル導体３の全部が基材２の第１主面２１に設けられていることに限定されず、コイル導体３の一部又は全部が基材２の第２主面２２に設けられていてもよい。 (2.2) Coil Conductor The coil conductor 3 is provided on the base material 2 as shown in FIGS. More specifically, the coil conductor 3 is provided on the first main surface 21 of the base material 2. The coil conductor 3 is provided on the first main surface 21 of the base material 2 by forming a copper film or an aluminum film on the first main surface 21 of the base material 2 by etching or printing, for example. It should be noted that the coil conductor 3 is not limited to being provided on the first main surface 21 of the base material 2, but a part or all of the coil conductor 3 is provided on the second main surface 22 of the base material 2. May be.
　コイル導体３は、コイル開口３５を有する。コイル導体３は、第２方向Ｄ２に沿った軸の周りにスパイラル状に、基材２に設けられている。図１の例では、コイル導体３は、５回巻かれた状態で基材２に設けられている。コイル導体３の材料は、例えば、銅又はアルミニウムである。 The coil conductor 3 has a coil opening 35. The coil conductor 3 is provided on the base material 2 in a spiral shape around an axis along the second direction D2. In the example of FIG. 1, the coil conductor 3 is provided on the base material 2 in a state of being wound five times. The material of the coil conductor 3 is, for example, copper or aluminum.
　コイル導体３は、第１コイル導体部３１と、第２コイル導体部３２とを有する。第１コイル導体部３１及び第２コイル導体部３２は、第１方向Ｄ１に隣り合っている。つまり、第１コイル導体部３１及び第２コイル導体部３２は、第１方向Ｄ１に並んで設けられている。磁性体４の第１主面４１の平面視つまり第２方向Ｄ２からの平面視で、第１コイル導体部３１及び第２コイル導体部３２は互いに重ならないように設けられている。より具体的には、磁性体４の第１主面４１の平面視つまり第２方向Ｄ２からの平面視で、第１コイル導体部３１のコイル導体の形成領域及びコイル導体の線間の領域を含む第１コイル導体部３１の形成領域は、第２コイル導体部３２のコイル導体の形成領域及びコイル導体の線間の領域を含む第２コイル導体部３２の形成領域と互いに重ならないように設けられている。 The coil conductor 3 has a first coil conductor portion 31 and a second coil conductor portion 32. The first coil conductor portion 31 and the second coil conductor portion 32 are adjacent to each other in the first direction D1. That is, the first coil conductor portion 31 and the second coil conductor portion 32 are arranged side by side in the first direction D1. The first coil conductor portion 31 and the second coil conductor portion 32 are provided so as not to overlap each other in a plan view of the first main surface 41 of the magnetic body 4, that is, a plan view from the second direction D2. More specifically, in a plan view of the first main surface 41 of the magnetic body 4, that is, in a plan view from the second direction D2, a region where the coil conductor is formed in the first coil conductor portion 31 and a region between lines of the coil conductor are formed. The formation region of the first coil conductor portion 31 that includes is provided so as not to overlap with the formation region of the second coil conductor portion 32 that includes the formation region of the coil conductor of the second coil conductor portion 32 and the region between the lines of the coil conductor. Has been.
　コイル導体３は、２次元のコイル導体であってもよいし、３次元のコイル導体であってもよい。２次元のコイル導体とは、一の平面上において巻回軸の周りに渦巻き状に複数回巻回されているような形状のコイル導体をいう。３次元のコイル導体とは、巻回軸の周りに巻回軸に沿ってらせん状に複数回巻回されているような形状のコイル導体をいう。図１は、２次元のコイル導体を示す。 The coil conductor 3 may be a two-dimensional coil conductor or a three-dimensional coil conductor. The two-dimensional coil conductor means a coil conductor having a shape in which it is spirally wound a plurality of times around a winding axis on one plane. The three-dimensional coil conductor refers to a coil conductor having a shape such that the coil conductor is spirally wound a plurality of times around the winding axis along the winding axis. FIG. 1 shows a two-dimensional coil conductor.
　第１コイル導体部３１は、磁性体４に対して第１主面４１側に設けられている。ここで「磁性体４に対して第１主面４１側に設けられている」とは、第２主面４２より第１主面４１に近接している位置関係を示す。言い換えると、第１コイル導体部３１は、第２方向Ｄ２において、磁性体４の第２主面４２よりも第１主面４１に近接して配置されている。 The first coil conductor portion 31 is provided on the first main surface 41 side with respect to the magnetic body 4. Here, “provided on the first main surface 41 side with respect to the magnetic body 4 ”refers to a positional relationship in which the second main surface 42 is closer to the first main surface 41. In other words, the first coil conductor portion 31 is arranged closer to the first main surface 41 than the second main surface 42 of the magnetic body 4 in the second direction D2.
　第２コイル導体部３２は、磁性体４に対して第２主面４２側に設けられている。ここで「磁性体４に対して第２主面４２側に設けられている」とは、第１主面４１より第２主面４２に近接している位置関係を示す。言い換えると、第２コイル導体部３２は、第２方向Ｄ２において、磁性体４の第１主面４１よりも第２主面４２に近接して配置されている。 The second coil conductor portion 32 is provided on the second main surface 42 side with respect to the magnetic body 4. Here, “provided on the second main surface 42 side with respect to the magnetic body 4 ”refers to a positional relationship in which the first main surface 41 is closer to the second main surface 42. In other words, the second coil conductor portion 32 is arranged closer to the second main surface 42 than the first main surface 41 of the magnetic body 4 in the second direction D2.
　そして、磁性体４の第１主面４１の平面視で、第１コイル導体部３１及び第２コイル導体部３２は、磁性体４と重なる。 Then, in a plan view of the first main surface 41 of the magnetic body 4, the first coil conductor portion 31 and the second coil conductor portion 32 overlap the magnetic body 4.
　また、コイル導体３は、第１コイル導体部３１及び第２コイル導体部３２とは異なる複数（図示例では２つ）の第３コイル導体部３３を更に含む。複数の第３コイル導体部３３の各々は、第１コイル導体部３１と第２コイル導体部３２との間に設けられている。より詳細には、各第３コイル導体部３３の一端は第１コイル導体部３１に接続されており、各第３コイル導体部３３の他端は第２コイル導体部３２に接続されている。 The coil conductor 3 further includes a plurality of (two in the illustrated example) third coil conductor portions 33 different from the first coil conductor portion 31 and the second coil conductor portion 32. Each of the plurality of third coil conductor portions 33 is provided between the first coil conductor portion 31 and the second coil conductor portion 32. More specifically, one end of each third coil conductor portion 33 is connected to the first coil conductor portion 31, and the other end of each third coil conductor portion 33 is connected to the second coil conductor portion 32.
　コイル導体３は、第４コイル導体部３４を更に含む。実施形態１では、第４コイル導体部３４は、第１コイル導体部３１に挿入されている。第４コイル導体部３４は、第１コイル導体部３１が沿っている第３方向Ｄ３に直交する第１方向Ｄ１に沿って設けられている。第４コイル導体部３４は、第１部分３４１と、第２部分３４２と、第３部分３４３とを有する。第１部分３４１及び第２部分３４２は、第１コイル導体部３１から第１方向Ｄ１に沿って延びている。第１部分３４１及び第２部分３４２は、磁性体４の第１主面４１の平面視において、磁性体４と重なる。一方、第３部分３４３は、磁性体４の第１主面４１の平面視において、磁性体４に対し第１方向Ｄ１に突出し、磁性体４とは重なっていない。第３部分３４３は、第１部分３４１の端部に接続されている第１片３４４と、第２部分３４２の端部に接続されている第２片３４５と、第１片３４４と第２片３４５とをつなぐ第３片３４６とを有する。本明細書では、第３部分３４３が設けられている領域、つまり、磁性体の第１主面４１の平面視で磁性体４に対し第１方向Ｄ１に突出し、磁性体４と重ならない領域が、アンテナ装置１の突出領域１１となる。ここで、磁性体４の第１主面４１は、基材２の第１主面２１及び第２主面２２、並びに磁性体４の第２主面４２にそれぞれ言い換えることができる。 The coil conductor 3 further includes a fourth coil conductor portion 34. In the first embodiment, the fourth coil conductor portion 34 is inserted in the first coil conductor portion 31. The fourth coil conductor portion 34 is provided along a first direction D1 that is orthogonal to the third direction D3 along which the first coil conductor portion 31 extends. The fourth coil conductor portion 34 has a first portion 341, a second portion 342, and a third portion 343. The first portion 341 and the second portion 342 extend from the first coil conductor portion 31 along the first direction D1. The first portion 341 and the second portion 342 overlap the magnetic body 4 in a plan view of the first main surface 41 of the magnetic body 4. On the other hand, in the plan view of the first main surface 41 of the magnetic body 4, the third portion 343 projects in the first direction D1 with respect to the magnetic body 4 and does not overlap the magnetic body 4. The third portion 343 includes a first piece 344 connected to an end of the first portion 341, a second piece 345 connected to an end of the second portion 342, a first piece 344 and a second piece. 345 and a third piece 346 that connects the two. In the present specification, a region where the third portion 343 is provided, that is, a region that protrudes in the first direction D1 with respect to the magnetic body 4 in a plan view of the first main surface 41 of the magnetic body and does not overlap the magnetic body 4 is defined. , The protruding area 11 of the antenna device 1. Here, the 1st main surface 41 of the magnetic body 4 can be paraphrased to the 1st main surface 21 and the 2nd main surface 22 of the base material 2, and the 2nd main surface 42 of the magnetic body 4, respectively.
　第１コイル導体部３１、第２コイル導体部３２、複数の第３コイル導体部３３、及び第４コイル導体部３４は、互いに連続することで、１つのコイル開口３５を定義するように、スパイラル状に巻回している。 The first coil conductor portion 31, the second coil conductor portion 32, the plurality of third coil conductor portions 33, and the fourth coil conductor portion 34 are continuous so as to define one coil opening 35, and thus the spiral. It is wound into a shape.
　コイル導体３は、第１端子電極５及び後述の第１配線部５１がコイル開口３５内に位置するように巻回されている。第４コイル導体部３４は、第１端子電極５及び後述の第１配線部５１を取り囲むように位置している。 The coil conductor 3 is wound so that the first terminal electrode 5 and the later-described first wiring portion 51 are located inside the coil opening 35. The fourth coil conductor portion 34 is located so as to surround the first terminal electrode 5 and a first wiring portion 51 described later.
　第１コイル導体部３１の線幅δ１は、第２コイル導体部３２の線幅δ２よりも太い。より詳細には、磁性体４の第１主面４１が通信相手側のアンテナと対向するように配置されている状態で、第１コイル導体部３１の線幅δ１が第２コイル導体部３２の線幅δ２よりも太い。これにより、アンテナ装置１の通信特性を更に向上させることができる。 The line width δ1 of the first coil conductor portion 31 is thicker than the line width δ2 of the second coil conductor portion 32. More specifically, in the state where the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side, the line width δ1 of the first coil conductor portion 31 is equal to that of the second coil conductor portion 32. It is thicker than the line width δ2. Thereby, the communication characteristics of the antenna device 1 can be further improved.
　また、コイル導体３は、第１端３６及び第２端３７を有する。第１端３６には、第１端子電極５が電気的に接続されており、第２端３７には、第２端子電極６が電気的に接続されている。より詳細には、第１端３６には、後述の第１配線部５１を介して第１端子電極５に接続されている。第２端３７には、後述の第２配線部６１を介して第２端子電極６に接続されている。 The coil conductor 3 also has a first end 36 and a second end 37. The first terminal electrode 5 is electrically connected to the first end 36, and the second terminal electrode 6 is electrically connected to the second end 37. More specifically, the first end 36 is connected to the first terminal electrode 5 via a first wiring portion 51 described below. The second end 37 is connected to the second terminal electrode 6 via a second wiring portion 61 described below.
　コイル開口３５は、第１開口領域３５１と、第２開口領域３５２とを有する。第２開口領域３５２は、第１開口領域３５１と連通している。第１開口領域３５１は、第１コイル導体部３１と第２コイル導体部３２と複数の第３コイル導体部３３とで囲まれている領域である。第２開口領域３５２は、第４コイル導体部３４で囲まれている領域である。 The coil opening 35 has a first opening area 351 and a second opening area 352. The second opening region 352 communicates with the first opening region 351. The first opening region 351 is a region surrounded by the first coil conductor portion 31, the second coil conductor portion 32, and the plurality of third coil conductor portions 33. The second opening region 352 is a region surrounded by the fourth coil conductor portion 34.
　（２．３）保護層
　保護層（図示せず）は、基材２に設けられたコイル導体３、第１端子電極５、及び第２端子電極６を覆い、外力などから基材２、コイル導体３、第１端子電極５、及び第２端子電極６を保護する。保護層は、板状又はシート状に形成されている。保護層の材料は、樹脂などの電気絶縁材料である。保護層に用いられる電気絶縁材料としては、例えば、ポリイミド又は液晶ポリマーがある。保護層は、例えば、接着層（図示せず）を介して基材２の第１主面２１に貼付されている。 (2.3) Protective Layer The protective layer (not shown) covers the coil conductor 3, the first terminal electrode 5, and the second terminal electrode 6 provided on the base material 2, and protects the base material 2 and the coil from external force. The conductor 3, the first terminal electrode 5, and the second terminal electrode 6 are protected. The protective layer is formed in a plate shape or a sheet shape. The material of the protective layer is an electrically insulating material such as resin. The electrically insulating material used for the protective layer is, for example, polyimide or liquid crystal polymer. The protective layer is attached to the first main surface 21 of the base material 2 via, for example, an adhesive layer (not shown).
　（２．４）磁性体
　磁性体４は、図１～図３に示すように、四角形の板状又は四角形のシート状であり、第１主面４１及び第２主面４２を有する。磁性体４の第１主面４１及び磁性体４の第２主面４２は、第２方向Ｄ２において、互いに対面する。 (2.4) Magnetic Material As shown in FIGS. 1 to 3, the magnetic material 4 has a rectangular plate shape or a rectangular sheet shape, and has a first main surface 41 and a second main surface 42. The first main surface 41 of the magnetic body 4 and the second main surface 42 of the magnetic body 4 face each other in the second direction D2.
　磁性体４は、基材２の貫通孔２３を通った状態で設けられている。より詳細には、磁性体４は、基材２の第１主面２１側に位置する部分と、基材２の第２主面２２側に位置する部分とを有する。 The magnetic body 4 is provided in a state of passing through the through hole 23 of the base material 2. More specifically, the magnetic body 4 has a portion located on the first main surface 21 side of the base material 2 and a portion located on the second main surface 22 side of the base material 2.
　磁性体４の材料は、フェライトなどの強磁性材料である。例えば、磁性体４の材料は、焼結体フェライト、アモルファス磁性体、又は磁性シートである。磁性体４に用いられる強磁性材料としては、例えばＭｎ－Ｚｎ－Ｆｅ系フェライト又はＮｉ－Ｚｎ－Ｆｅ系フェライトがある。磁性体４は、基材２及び保護層（図示せず）よりも高い透磁率を有する。 The material of the magnetic body 4 is a ferromagnetic material such as ferrite. For example, the material of the magnetic body 4 is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet. Examples of the ferromagnetic material used for the magnetic body 4 include Mn—Zn—Fe based ferrite or Ni—Zn—Fe based ferrite. The magnetic body 4 has a higher magnetic permeability than the base material 2 and the protective layer (not shown).
　第１主面４１は、通信相手側のアンテナ（図示せず）と対向するように配置されている。より詳細には、アンテナ装置１は、第１主面４１側を主な通信面とする。ここで「主な通信面」とは通信相手と通信する際に、相手側アンテナ装置の相手側コイル導体（図示せず）に主に近接させる面である。つまり、アンテナ装置１は、磁性体４の第２主面４２に近接する通信相手よりも、第１主面２１に近接する通信相手と通信を行うことを主とする。 The first main surface 41 is arranged so as to face an antenna (not shown) on the communication partner side. More specifically, the antenna device 1 uses the first main surface 41 side as a main communication surface. Here, the "main communication surface" is a surface which is mainly brought close to the partner coil conductor (not shown) of the partner antenna device when communicating with the partner. That is, the antenna device 1 mainly communicates with a communication partner closer to the first principal surface 21 than a communication partner closer to the second principal surface 42 of the magnetic body 4.
　（２．５）第１端子電極及び第２端子電極
　第１端子電極５は、図１に示すように、コイル導体３の第１端３６に電気的に接続されている。より詳細には、第１端子電極５は、第１配線部５１を介してコイル導体３の第１端３６に電気的に接続されている。つまり、第１配線部５１の一端にコイル導体３の第１端３６が接続されており、第１配線部５１の他端に第１端子電極５が接続されている。 (2.5) First Terminal Electrode and Second Terminal Electrode The first terminal electrode 5 is electrically connected to the first end 36 of the coil conductor 3, as shown in FIG. More specifically, the first terminal electrode 5 is electrically connected to the first end 36 of the coil conductor 3 via the first wiring portion 51. That is, the first end 36 of the coil conductor 3 is connected to one end of the first wiring portion 51, and the first terminal electrode 5 is connected to the other end of the first wiring portion 51.
　第１端子電極５は、コイル導体３のコイル開口３５内に設けられている。より詳細には、コイル開口３５のうちの第２開口領域３５２に設けられている。 The first terminal electrode 5 is provided in the coil opening 35 of the coil conductor 3. More specifically, it is provided in the second opening region 352 of the coil opening 35.
　第２端子電極６は、コイル導体３の第２端３７に電気的に接続されている。より詳細には、第２端子電極６は、第２配線部６１を介してコイル導体３の第２端３７に電気的に接続されている。つまり、第２配線部６１の一端にコイル導体３の第２端３７が接続されており、第２配線部６１の他端に第２端子電極６が接続されている。 The second terminal electrode 6 is electrically connected to the second end 37 of the coil conductor 3. More specifically, the second terminal electrode 6 is electrically connected to the second end 37 of the coil conductor 3 via the second wiring portion 61. That is, the second end 37 of the coil conductor 3 is connected to one end of the second wiring portion 61, and the second terminal electrode 6 is connected to the other end of the second wiring portion 61.
　第１端子電極５及び第２端子電極６は、磁性体４の第１主面４１の平面視で第１方向Ｄ１において磁性体４と重ならない突出領域に位置する。より詳細には、第１端子電極５及び第２端子電極６は、基材２のうち突出領域１１に相当する突出部２５の第１主面２１に設けられている。第１端子電極５及び第２端子電極６は、コイル導体３、第１配線部５１、及び第２配線部６１と共に、基材２の第１主面２１上に一体に設けられている。 The first terminal electrode 5 and the second terminal electrode 6 are located in a projecting region that does not overlap the magnetic body 4 in the first direction D1 in a plan view of the first main surface 41 of the magnetic body 4. More specifically, the first terminal electrode 5 and the second terminal electrode 6 are provided on the first major surface 21 of the protruding portion 25 corresponding to the protruding region 11 of the base material 2. The first terminal electrode 5 and the second terminal electrode 6 are integrally provided on the first main surface 21 of the base material 2 together with the coil conductor 3, the first wiring portion 51, and the second wiring portion 61.
　上記のように第１端子電極５及び第２端子電極６が、磁性体４の第１主面４１の平面視で、磁性体４に対して第１方向Ｄ１に突出し、磁性体４と重ならない突出領域１１に位置することにより、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 As described above, the first terminal electrode 5 and the second terminal electrode 6 project in the first direction D1 with respect to the magnetic body 4 in the plan view of the first main surface 41 of the magnetic body 4, and do not overlap with the magnetic body 4. By being located in the protruding region 11, it is possible to improve the communication characteristic while stabilizing the communication characteristic at low cost.
　（３）アンテナ装置の動作
　以下、実施形態１に係るアンテナ装置１の動作について、図４Ａ及び図４Ｂを参照して説明する。アンテナ装置１の通信相手である相手側アンテナ装置（図示せず）は、図４Ｂにおいて、アンテナ装置１の上側に位置している。相手側アンテナ装置の相手側コイル導体（図示せず）は、コイル導体３と対向している。 (3) Operation of Antenna Device The operation of the antenna device 1 according to the first embodiment will be described below with reference to FIGS. 4A and 4B. A partner antenna device (not shown) that is a communication partner of the antenna device 1 is located above the antenna device 1 in FIG. 4B. The counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3.
　相手側アンテナ装置で発生した磁束φ１は、アンテナ装置１において、透磁率の高い磁性体４を集中的に通るような閉ループを形成する。磁性体４を通る磁束φ１により、コイル導体３の第１コイル導体部３１には、磁束φ１を打ち消すような誘導起電力が発生する。これにより、コイル導体３には、電流ｉ１が流れる。 The magnetic flux φ1 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1. Due to the magnetic flux φ1 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux φ1 is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i1 flows through the coil conductor 3.
　ここで、第１コイル導体部３１の線幅δ１が太いため、第１コイル導体部３１の線幅が細い場合に比べて、コイル導体３に流れる電流ｉ１は大きくなる。これにより、アンテナ装置１の通信特性を向上させることができる。 Here, since the line width δ1 of the first coil conductor portion 31 is large, the current i1 flowing through the coil conductor 3 is larger than when the line width of the first coil conductor portion 31 is thin. Thereby, the communication characteristics of the antenna device 1 can be improved.
　（４）効果
　実施形態１に係るアンテナ装置１では、第１端子電極５及び第２端子電極６が、磁性体４の第１主面４１の平面視で第１方向Ｄ１において磁性体４と重ならない突出領域１１に位置する。これにより、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 (4) Effects In the antenna device 1 according to the first embodiment, the first terminal electrode 5 and the second terminal electrode 6 overlap the magnetic body 4 in the first direction D1 in a plan view of the first main surface 41 of the magnetic body 4. It is located in the protruding region 11 which does not become. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
　実施形態１に係るアンテナ装置１では、磁性体４の第１主面４１が通信相手側のアンテナと対向するように配置されている状態で、第１コイル導体部３１の線幅δ１が第２コイル導体部３２の線幅δ２よりも太い。これにより、アンテナ装置１の通信特性を更に向上させることができる。 In the antenna device 1 according to the first embodiment, the line width δ1 of the first coil conductor portion 31 is set to the second when the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side. It is thicker than the line width δ2 of the coil conductor portion 32. Thereby, the communication characteristics of the antenna device 1 can be further improved.
　（５）変形例
　以下、実施形態１の変形例について説明する。 (5) Modified Example Hereinafter, a modified example of the first embodiment will be described.
　アンテナ装置１の突出領域１１は、第３方向Ｄ３において、図１の位置に設けられていることに限定されない。突出領域１１は、第３方向Ｄ３において、図１の左端に設けられていてもよいし、図１の右端に設けられていてもよい。あるいは、突出領域１１は、第３方向Ｄ３において、基材２の主部２４の端部よりも内側に位置していればよい。つまり、突出領域１１は、第３方向Ｄ３における基材２の主部２４の端部よりも外側に位置しなければよい。また、突出領域１１は、第３方向Ｄ３における基材２の主部２４の中心に位置していてもよい。 The protruding area 11 of the antenna device 1 is not limited to being provided in the position of FIG. 1 in the third direction D3. The protruding region 11 may be provided at the left end in FIG. 1 or the right end in FIG. 1 in the third direction D3. Alternatively, the protruding region 11 may be located inside the end portion of the main portion 24 of the base material 2 in the third direction D3. That is, the protruding region 11 has only to be located outside the end of the main portion 24 of the base material 2 in the third direction D3. Further, the protruding region 11 may be located at the center of the main portion 24 of the base material 2 in the third direction D3.
　上記の各変形例に係るアンテナ装置１においても、実施形態１に係るアンテナ装置１と同様の効果を奏する。 The antenna device 1 according to each of the above modifications also has the same effect as the antenna device 1 according to the first embodiment.
　（実施形態２）
　実施形態２に係るアンテナ装置１ａは、図５に示すように、導電部材７を更に備える点で、実施形態１に係るアンテナ装置１（図１参照）と相違する。なお、実施形態２に係るアンテナ装置１ａに関し、実施形態１に係るアンテナ装置１と同様の構成要素については、同一の符号を付して説明を省略する。 (Embodiment 2)
As shown in FIG. 5, the antenna device 1a according to the second embodiment differs from the antenna device 1 according to the first embodiment (see FIG. 1) in that the antenna device 1a further includes a conductive member 7. Regarding the antenna device 1a according to the second embodiment, the same components as those of the antenna device 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
　（１）アンテナ装置の構成
　アンテナ装置１ａは、図５～図７に示すように、基材２と、コイル導体３と、磁性体４と、第１端子電極５と、第２端子電極６と、導電部材７とを備える。 (1) Configuration of Antenna Device As shown in FIGS. 5 to 7, the antenna device 1a includes a base material 2, a coil conductor 3, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
　導電部材７は、図５～図７に示すように、磁性体４の第２主面４２と対向する。これにより、磁束が導電部材７を避けて磁性体４を通るようになるので、集磁効果を向上させることができる。 The conductive member 7 faces the second main surface 42 of the magnetic body 4, as shown in FIGS. 5 to 7. This allows the magnetic flux to pass through the magnetic body 4 while avoiding the conductive member 7, so that the magnetic flux collecting effect can be improved.
　導電部材７は、例えば、正方形の主面を有する形状に形成されている平面導体である。導電部材７の材料は、例えば、アルミニウム、ステンレス、又は銅のような金属である。導電部材７の材料は、単一の導体であってもよいし、複数の導体であってもよい。また、導電部材７は、単体の導体に限定されず、他の部品（例えばバッテリ）の一部を構成する導体であってもよい。 The conductive member 7 is, for example, a plane conductor formed in a shape having a square main surface. The material of the conductive member 7 is, for example, a metal such as aluminum, stainless steel, or copper. The material of the conductive member 7 may be a single conductor or a plurality of conductors. Further, the conductive member 7 is not limited to a single conductor, and may be a conductor forming a part of another component (for example, a battery).
　導電部材７は、主面７１を有し、第２方向Ｄ２において主面７１がコイル導体３及び磁性体４と対向するように配置されている。言い換えると、導電部材７は、導電部材７の主面７１の平面視で、少なくとも一部がコイル導体３及び磁性体４と重なるように配置されている。より詳細には、導電部材７は、第２方向Ｄ２において、磁性体４の第２主面４２側に配置されている。言い換えると、導電部材７は、第２方向Ｄ２において、磁性体４の第１主面４１よりも第２主面４２に近接して配置されている。主面７１は長方形状の平面である。 The conductive member 7 has a main surface 71, and is arranged so that the main surface 71 faces the coil conductor 3 and the magnetic body 4 in the second direction D2. In other words, the conductive member 7 is arranged so that at least a part thereof overlaps the coil conductor 3 and the magnetic body 4 in a plan view of the main surface 71 of the conductive member 7. More specifically, the conductive member 7 is arranged on the second main surface 42 side of the magnetic body 4 in the second direction D2. In other words, the conductive member 7 is arranged closer to the second main surface 42 than the first main surface 41 of the magnetic body 4 in the second direction D2. The main surface 71 is a rectangular flat surface.
　導電部材７では、第２方向Ｄ２の寸法に対する第１方向Ｄ１の寸法の寸法比が１よりも大きく、かつ、第２方向Ｄ２の寸法に対する第３方向Ｄ３の寸法の寸法比が１よりも大きい。つまり、導電部材７は、第２方向Ｄ２の寸法よりも第１方向Ｄ１の寸法及び第３方向Ｄ３の寸法のほうが長い平面導体である。 In the conductive member 7, the dimension ratio of the dimension of the first direction D1 to the dimension of the second direction D2 is larger than 1, and the dimension ratio of the dimension of the third direction D3 to the dimension of the second direction D2 is larger than 1. .. That is, the conductive member 7 is a planar conductor in which the dimension in the first direction D1 and the dimension in the third direction D3 are longer than the dimension in the second direction D2.
　なお、導電部材７において、コイル導体３及び磁性体４と対向する主面７１が完全な平面であることに限定されない。ここでは、導電部材７の第２方向Ｄ２における寸法（導電部材７の厚さ）又は第１方向Ｄ１における寸法に比べて小さい凹凸があっても、主面７１は平面といえる。また、主面７１の全てが平面であることに限定されない。すなわち、主面７１は、少なくとも一部において、平面であってもよい。なお、導電部材７として、平面導体に代えて、曲面を有する面状導体を用いてもよい。 Note that, in the conductive member 7, the main surface 71 facing the coil conductor 3 and the magnetic body 4 is not limited to being a complete flat surface. Here, the main surface 71 can be said to be a flat surface even if there is unevenness smaller than the dimension of the conductive member 7 in the second direction D2 (thickness of the conductive member 7) or the dimension in the first direction D1. Further, all the main surfaces 71 are not limited to being flat. That is, the main surface 71 may be a flat surface at least in part. As the conductive member 7, a planar conductor having a curved surface may be used instead of the planar conductor.
　磁性体４の平面視で、導電部材７の外縁は、コイル導体３の外縁よりも外側に位置するように設けられている。より詳細には、第１コイル導体部３１と第２コイル導体部３２とが並んでいる方向すなわち第１方向Ｄ１において、導電部材７の外縁は、コイル導体３の外縁よりも外側に位置している。同様に、第１コイル導体部３１と第２コイル導体部３２とが並んでいる方向と直交する方向すなわち第３方向Ｄ３において、導電部材７の外縁は、コイル導体３の外縁よりも外側に位置している。 The outer edge of the conductive member 7 is provided outside the outer edge of the coil conductor 3 in a plan view of the magnetic body 4. More specifically, the outer edge of the conductive member 7 is located outside the outer edge of the coil conductor 3 in the direction in which the first coil conductor portion 31 and the second coil conductor portion 32 are arranged, that is, in the first direction D1. There is. Similarly, in the direction orthogonal to the direction in which the first coil conductor portion 31 and the second coil conductor portion 32 are arranged, that is, the third direction D3, the outer edge of the conductive member 7 is located outside the outer edge of the coil conductor 3. doing.
　（２）アンテナ装置の動作
　以下、実施形態２に係るアンテナ装置１ａの動作について、図８Ａ及び図８Ｂを参照して説明する。アンテナ装置１ａの通信相手である相手側アンテナ装置（図示せず）は、図８Ｂにおいて、アンテナ装置１ａの上側に位置している。相手側アンテナ装置の相手側コイル導体（図示せず）は、コイル導体３と対向している。 (2) Operation of Antenna Device The operation of the antenna device 1a according to the second embodiment will be described below with reference to FIGS. 8A and 8B. A partner antenna device (not shown) that is a communication partner of the antenna device 1a is located above the antenna device 1a in FIG. 8B. The counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3.
　相手側アンテナ装置で発生した磁束φ２は、アンテナ装置１ａにおいて、透磁率の高い磁性体４を集中的に通るような閉ループを形成する。磁性体４を通る磁束φ２により、コイル導体３の第１コイル導体部３１には、磁束φ２を打ち消すような誘導起電力が発生する。これにより、コイル導体３には、電流ｉ２が流れる。 The magnetic flux φ2 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1a. Due to the magnetic flux φ2 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux φ2 is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i2 flows through the coil conductor 3.
　ここで、実施形態１と同様、第１コイル導体部３１の線幅δ１が太いため、第１コイル導体部３１の線幅が細い場合に比べて、コイル導体３に流れる電流ｉ２は大きくなる。これにより、アンテナ装置１ａの通信特性を向上させることができる。 Here, as in the first embodiment, since the line width δ1 of the first coil conductor portion 31 is large, the current i2 flowing through the coil conductor 3 is larger than when the line width of the first coil conductor portion 31 is thin. Thereby, the communication characteristics of the antenna device 1a can be improved.
　さらに、実施形態２に係るアンテナ装置１ａでは、相手側アンテナ装置とは反対側に導電部材７が設けられているため、相手側アンテナ装置からの磁束φ２は、導電部材７側を通りにくくなり、透磁率の高い磁性体４を更に集中的に通る。これにより、磁性体４を通る磁束φ２が更に大きくなるので、コイル導体３の第１コイル導体部３１には、より大きな誘導起電力が発生する。その結果、コイル導体３に流れる電流ｉ２は、より大きくなる。 Further, in the antenna device 1a according to the second embodiment, since the conductive member 7 is provided on the side opposite to the partner antenna device, the magnetic flux φ2 from the partner antenna device is less likely to pass through the conductive member 7 side. It passes through the magnetic body 4 having a high magnetic permeability more intensively. As a result, the magnetic flux φ2 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31 of the coil conductor 3. As a result, the current i2 flowing through the coil conductor 3 becomes larger.
　（３）効果
　実施形態２に係るアンテナ装置１ａでは、磁性体４の第２主面４２と対向するように導電部材７が設けられている。これにより、磁束φ２が導電部材７を避けて磁性体４を通るようになるので、集磁効果を向上させることができる。 (3) Effects In the antenna device 1a according to the second embodiment, the conductive member 7 is provided so as to face the second main surface 42 of the magnetic body 4. As a result, the magnetic flux φ2 comes to pass through the magnetic body 4 while avoiding the conductive member 7, so that the magnetism collecting effect can be improved.
　（実施形態３）
　実施形態３に係るアンテナ装置１ｂは、図９に示すように、突出領域１１がコイル導体３ｂの第２コイル導体部３２ｂと直交するように突出している点で、実施形態２に係るアンテナ装置１ａ（図５参照）と相違する。なお、実施形態３に係るアンテナ装置１ｂに関し、実施形態２に係るアンテナ装置１ａと同様の構成要素については、同一の符号を付して説明を省略する。 (Embodiment 3)
As shown in FIG. 9, the antenna device 1b according to the third embodiment is such that the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b of the coil conductor 3b. (See FIG. 5). Regarding the antenna device 1b according to the third embodiment, the same components as those of the antenna device 1a according to the second embodiment are designated by the same reference numerals and the description thereof will be omitted.
　（１）アンテナ装置の構成
　アンテナ装置１ｂは、図９～図１１に示すように、基材２と、コイル導体３ｂと、磁性体４と、第１端子電極５と、第２端子電極６と、導電部材７とを備える。 (1) Configuration of Antenna Device As shown in FIGS. 9 to 11, the antenna device 1b includes a base material 2, a coil conductor 3b, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
　コイル導体３ｂは、図９～図１１に示すように、実施形態２と同様、基材２に設けられている。また、コイル導体３ｂは、コイル開口３５ｂを有する。コイル導体３ｂは、実施形態２と同様、第２方向Ｄ２に沿った軸の周りにスパイラル状に、基材２に設けられている。コイル導体３の材料は、例えば、銅又はアルミニウムである。 The coil conductor 3b is provided on the base material 2 as in the second embodiment, as shown in FIGS. 9 to 11. The coil conductor 3b has a coil opening 35b. The coil conductor 3b is provided in the base material 2 in a spiral shape around the axis along the second direction D2, as in the second embodiment. The material of the coil conductor 3 is, for example, copper or aluminum.
　コイル導体３ｂは、第１コイル導体部３１ｂと、第２コイル導体部３２ｂと、複数（図示例では２つ）の第３コイル導体部３３ｂと、第４コイル導体部３４ｂとを有する。なお、実施形態３のコイル導体３ｂに関し、実施形態２のコイル導体３（図５参照）と同様の構成及び機能については説明を省略する。 The coil conductor 3b has a first coil conductor portion 31b, a second coil conductor portion 32b, a plurality (two in the illustrated example) of third coil conductor portions 33b, and a fourth coil conductor portion 34b. Regarding the coil conductor 3b of the third embodiment, description of the same configuration and function as the coil conductor 3 of the second embodiment (see FIG. 5) is omitted.
　第１コイル導体部３１ｂは、実施形態２と同様、磁性体４に対して第１主面４１側に設けられている。第２コイル導体部３２は、磁性体４に対して第２主面４２側に設けられている。そして、磁性体４の第１主面４１の平面視で、第１コイル導体部３１ｂ及び第２コイル導体部３２ｂは、磁性体４と重なる。複数の第３コイル導体部３３ｂの各々は、実施形態２と同様、第１コイル導体部３１ｂと第２コイル導体部３２ｂとの間に設けられている。 Like the second embodiment, the first coil conductor portion 31b is provided on the first main surface 41 side with respect to the magnetic body 4. The second coil conductor portion 32 is provided on the second main surface 42 side with respect to the magnetic body 4. Then, in a plan view of the first main surface 41 of the magnetic body 4, the first coil conductor portion 31b and the second coil conductor portion 32b overlap the magnetic body 4. Each of the plurality of third coil conductor portions 33b is provided between the first coil conductor portion 31b and the second coil conductor portion 32b, as in the second embodiment.
　第１コイル導体部３１ｂ及び第２コイル導体部３２ｂは、実施形態２と同様、第１方向Ｄ１に並んで設けられている。ただし、基材２の主部２４において、突出部２５が設けられている側に第２コイル導体部３２ｂが設けられており、突出部２５が設けられている側とは反対側に第１コイル導体部３１ｂが設けられている。 The first coil conductor portion 31b and the second coil conductor portion 32b are arranged side by side in the first direction D1 as in the second embodiment. However, in the main portion 24 of the base material 2, the second coil conductor portion 32b is provided on the side where the projecting portion 25 is provided, and the first coil is provided on the side opposite to the side where the projecting portion 25 is provided. The conductor portion 31b is provided.
　第４コイル導体部３４ｂは、第２コイル導体部３２ｂに挿入されている。第４コイル導体部３４ｂは、実施形態２の第４コイル導体部３４（図５参照）と同様、第１部分３４１と、第２部分３４２と、第３部分３４３とを有する。ただし、実施形態３の第１部分３４１及び第２部分３４２は、第２コイル導体部３２ｂから第１方向Ｄ１に沿って延びている。 The fourth coil conductor portion 34b is inserted in the second coil conductor portion 32b. The 4th coil conductor part 34b has the 1st part 341, the 2nd part 342, and the 3rd part 343 similarly to the 4th coil conductor part 34 of Embodiment 2 (refer FIG. 5). However, the first portion 341 and the second portion 342 of the third embodiment extend from the second coil conductor portion 32b along the first direction D1.
　上記より、突出領域１１は、第２コイル導体部３２ｂと直交するように突出している。これにより、通信相手側のアンテナに近くて通信相手側からの磁束を受けやすい第１コイル導体部３１ｂを、電流が発生する部分として、最大限に活用することができる。 From the above, the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b. As a result, the first coil conductor portion 31b, which is close to the antenna on the communication partner side and easily receives the magnetic flux from the communication partner side, can be utilized to the maximum as a portion where a current is generated.
　コイル導体３ｂは、実施形態２と同様、第１端子電極５及び第１配線部５１がコイル開口３５ｂ内に位置するように巻回されている。第４コイル導体部３４ｂは、第１端子電極５及び第１配線部５１を取り囲むように位置している。 Like the second embodiment, the coil conductor 3b is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35b. The fourth coil conductor portion 34b is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
　第１コイル導体部３１ｂの線幅δ１は、第２コイル導体部３２ｂの線幅δ２よりも太い。より詳細には、磁性体４の第１主面４１が通信相手側のアンテナと対向するように配置されている状態で、第１コイル導体部３１ｂの線幅δ１が第２コイル導体部３２ｂの線幅δ２よりも太い。これにより、アンテナ装置１ｂの通信特性を更に向上させることができる。 The line width δ1 of the first coil conductor portion 31b is thicker than the line width δ2 of the second coil conductor portion 32b. More specifically, in a state where the first main surface 41 of the magnetic body 4 is arranged so as to face the antenna on the communication partner side, the line width δ1 of the first coil conductor portion 31b is equal to that of the second coil conductor portion 32b. It is thicker than the line width δ2. Thereby, the communication characteristics of the antenna device 1b can be further improved.
　コイル開口３５は、実施形態２と同様、第１開口領域３５１と、第２開口領域３５２とを有する。実施形態３の第２開口領域３５２は、第４コイル導体部３４ｂで囲まれている領域である。 The coil opening 35 has a first opening area 351 and a second opening area 352, as in the second embodiment. The second opening region 352 of the third embodiment is a region surrounded by the fourth coil conductor portion 34b.
　（２）アンテナ装置の動作
　以下、実施形態３に係るアンテナ装置１ｂの動作について、図１２Ａ及び図１２Ｂを参照して説明する。アンテナ装置１ｂの通信相手である相手側アンテナ装置（図示せず）は、図１２Ｂにおいて、アンテナ装置１ｂの上側に位置している。相手側アンテナ装置の相手側コイル導体（図示せず）は、コイル導体３ｂと対向している。 (2) Operation of Antenna Device The operation of the antenna device 1b according to the third embodiment will be described below with reference to FIGS. 12A and 12B. A partner antenna device (not shown) that is a communication partner of the antenna device 1b is located above the antenna device 1b in FIG. 12B. The counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3b.
　相手側アンテナ装置で発生した磁束φ３は、アンテナ装置１ｂにおいて、透磁率の高い磁性体４を集中的に通るような閉ループを形成する。磁性体４を通る磁束φ３により、コイル導体３ｂの第１コイル導体部３１ｂには、磁束φ３を打ち消すような誘導起電力が発生する。これにより、コイル導体３ｂには、電流ｉ３が流れる。 The magnetic flux φ3 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1b. Due to the magnetic flux φ3 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux φ3 is generated in the first coil conductor portion 31b of the coil conductor 3b. As a result, the current i3 flows through the coil conductor 3b.
　ここで、実施形態２と同様、第１コイル導体部３１ｂの線幅δ１が太いため、第１コイル導体部３１ｂの線幅が細い場合に比べて、コイル導体３ｂに流れる電流ｉ３は大きくなる。これにより、アンテナ装置１ｂの通信特性を向上させることができる。 Here, as in the second embodiment, since the line width δ1 of the first coil conductor portion 31b is large, the current i3 flowing through the coil conductor 3b is larger than when the line width of the first coil conductor portion 31b is thin. Thereby, the communication characteristics of the antenna device 1b can be improved.
　さらに、実施形態２と同様、相手側アンテナ装置とは反対側に導電部材７が設けられているため、相手側アンテナ装置からの磁束φ３は、導電部材７側を通りにくくなり、透磁率の高い磁性体４を更に集中的に通る。これにより、磁性体４を通る磁束φ３が更に大きくなるので、コイル導体３ｂの第１コイル導体部３１ｂには、より大きな誘導起電力が発生する。その結果、コイル導体３ｂに流れる電流ｉ３は、より大きくなる。 Further, as in the second embodiment, since the conductive member 7 is provided on the side opposite to the counterpart antenna device, the magnetic flux φ3 from the counterpart antenna device is less likely to pass through the conductive member 7 side, and the magnetic permeability is high. It passes through the magnetic body 4 more intensively. As a result, the magnetic flux φ3 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31b of the coil conductor 3b. As a result, the current i3 flowing through the coil conductor 3b becomes larger.
　実施形態３に係るアンテナ装置１ｂでは、第２コイル導体部３２ｂに第４コイル導体部３４ｂが挿入されており、第２コイル導体部３２ｂよりも線幅の太い第１コイル導体部３１ｂには、第４コイル導体部３４ｂが挿入されていない。これにより、第１コイル導体部３１ｂに第４コイル導体部３４ｂが挿入されている場合に比べて、第１コイル導体部３１ｂが大きくなるので、第１コイル導体部３１ｂには、より大きな誘導起電力が発生する。その結果、第１コイル導体部３１ｂに第４コイル導体部３４ｂが挿入されている場合に比べて、コイル導体３ｂに流れる電流ｉ３は、より大きくなる。 In the antenna device 1b according to the third embodiment, the fourth coil conductor portion 34b is inserted into the second coil conductor portion 32b, and the first coil conductor portion 31b having a larger line width than the second coil conductor portion 32b has The fourth coil conductor portion 34b is not inserted. As a result, the first coil conductor portion 31b becomes larger than that in the case where the fourth coil conductor portion 34b is inserted into the first coil conductor portion 31b. Electricity is generated. As a result, the current i3 flowing through the coil conductor 3b becomes larger than that in the case where the fourth coil conductor portion 34b is inserted in the first coil conductor portion 31b.
　（３）効果
　実施形態３に係るアンテナ装置１ｂでは、突出領域１１が第２コイル導体部３２ｂと直交するように突出している。これにより、通信相手側のアンテナに近くて通信相手側からの磁束φ３を受けやすい第１コイル導体部３１ｂを、電流ｉ３が発生する部分として、最大限に活用することができる。 (3) Effects In the antenna device 1b according to the third embodiment, the projecting region 11 projects so as to be orthogonal to the second coil conductor portion 32b. Thus, the first coil conductor portion 31b, which is close to the antenna on the communication partner side and is likely to receive the magnetic flux φ3 from the communication partner side, can be utilized to the maximum as the portion where the current i3 is generated.
　（４）変形例
　実施形態３の変形例として、アンテナ装置１ｂは、導電部材７を備えていなくてもよい。 (4) Modified Example As a modified example of the third embodiment, the antenna device 1b may not include the conductive member 7.
　上記の各変形例に係るアンテナ装置１ｂにおいても、実施形態３に係るアンテナ装置１ｂと同様の効果を奏する。 The antenna device 1b according to each of the above modifications also has the same effect as the antenna device 1b according to the third embodiment.
　（実施形態４）
　実施形態４に係るアンテナ装置１ｃは、図１３に示すように、コイル導体３ｃが折り畳まれている状態である点で、実施形態３に係るアンテナ装置１ｂ（図９参照）と相違する。なお、実施形態４に係るアンテナ装置１ｃに関し、実施形態３に係るアンテナ装置１ｂと同様の構成要素については、同一の符号を付して説明を省略する。 (Embodiment 4)
The antenna device 1c according to the fourth embodiment is different from the antenna device 1b according to the third embodiment (see FIG. 9) in that the coil conductor 3c is folded as shown in FIG. Regarding the antenna device 1c according to the fourth embodiment, the same components as those of the antenna device 1b according to the third embodiment are designated by the same reference numerals and the description thereof will be omitted.
　（１）アンテナ装置の構成
　アンテナ装置１ｃは、図１３～図１５に示すように、基材２ｃと、コイル導体３ｃと、磁性体４と、第１端子電極５と、第２端子電極６と、導電部材７とを備える。 (1) Configuration of Antenna Device As shown in FIGS. 13 to 15, the antenna device 1c includes a base material 2c, a coil conductor 3c, a magnetic body 4, a first terminal electrode 5, and a second terminal electrode 6. , And a conductive member 7.
　基材２ｃは、図１３～図１５に示すように、板状又はシート状に形成されており、互いに対向する第１主面２１ｃ及び第２主面２２ｃを有する。基材２ｃにおける外周縁と内周縁との間の幅は、コイル導体３ｃが設けられるのに十分な大きさである。なお、実施形態４の基材２ｃに関し、実施形態３の基材２（図９参照）と同様の構成及び機能については説明を省略する。 As shown in FIGS. 13 to 15, the base material 2c is formed in a plate shape or a sheet shape, and has a first main surface 21c and a second main surface 22c facing each other. The width between the outer peripheral edge and the inner peripheral edge of the base material 2c is large enough to provide the coil conductor 3c. Regarding the base material 2c of the fourth embodiment, the description of the same configuration and function as the base material 2 of the third embodiment (see FIG. 9) is omitted.
　基材２ｃは、長方形状の主部２４ｃと、主部２４ｃの一部から突出する突出部２５ｃとを有する。主部２４ｃと突出部２５ｃは、一体に形成されている。主部２４ｃは、基材２ｃの厚さ方向（第２方向Ｄ２）からの平面視で長方形状である。 The base material 2c has a rectangular main portion 24c and a protruding portion 25c protruding from a part of the main portion 24c. The main portion 24c and the protruding portion 25c are integrally formed. The main portion 24c has a rectangular shape in a plan view from the thickness direction (second direction D2) of the base material 2c.
　突出部２５ｃは、実施形態３と同様、主部２４ｃにおける第３方向Ｄ３に沿った一辺から第１方向Ｄ１に突出して設けられている。アンテナ装置１ｃにおいて突出部２５ｃが設けられている領域が、アンテナ装置１ｃの突出領域１１となる。 Like the third embodiment, the protruding portion 25c is provided so as to protrude in the first direction D1 from one side of the main portion 24c along the third direction D3. The area where the protruding portion 25c is provided in the antenna device 1c is the protruding area 11 of the antenna device 1c.
　コイル導体３ｃは、図１３～図１５に示すように、第１コイル導体部３１ｃと、第２コイル導体部３２ｃと、複数（図示例では２つ）の第３コイル導体部３３ｃと、第４コイル導体部３４ｃとを有する。また、コイル導体３ｃは、コイル開口３５ｃを有する。なお、実施形態４のコイル導体３ｃに関し、実施形態３のコイル導体３ｂ（図９参照）と同様の構成及び機能については説明を省略する。 As shown in FIGS. 13 to 15, the coil conductor 3c includes a first coil conductor portion 31c, a second coil conductor portion 32c, a plurality of (two in the illustrated example) third coil conductor portions 33c, and a fourth coil conductor portion 33c. And a coil conductor portion 34c. The coil conductor 3c has a coil opening 35c. Regarding the coil conductor 3c of the fourth embodiment, the description of the same configuration and function as those of the coil conductor 3b (see FIG. 9) of the third embodiment will be omitted.
　基材２ｃは、図１３及び図１４に示すように、第１主面２１ｃにコイル導体３ｃが設けられた状態で、第３方向Ｄ３に沿った折れ線Ｌ１（図１５参照）で折り畳まれている。これにより、第１コイル導体部３１ｃは、磁性体４の第１主面４１側に設けられている状態となり、第２コイル導体部３２ｃは、磁性体４の第２主面４２側に設けられている状態となる。 As shown in FIGS. 13 and 14, the base material 2c is folded along a fold line L1 (see FIG. 15) along the third direction D3 with the coil conductor 3c provided on the first major surface 21c. .. As a result, the first coil conductor portion 31c is provided on the first main surface 41 side of the magnetic body 4, and the second coil conductor portion 32c is provided on the second main surface 42 side of the magnetic body 4. It will be in the state of being.
　（２）アンテナ装置の動作
　以下、実施形態４に係るアンテナ装置１ｃの動作について、図１６Ａ及び図１６Ｂを参照して説明する。アンテナ装置１ｃの通信相手である相手側アンテナ装置（図示せず）は、図１６Ｂにおいて、アンテナ装置１ｃの上側に位置している。相手側アンテナ装置の相手側コイル導体（図示せず）は、コイル導体３ｃと対向している。 (2) Operation of Antenna Device The operation of the antenna device 1c according to the fourth embodiment will be described below with reference to FIGS. 16A and 16B. A partner antenna device (not shown) that is a communication partner of the antenna device 1c is located above the antenna device 1c in FIG. 16B. The counterpart coil conductor (not shown) of the counterpart antenna device faces the coil conductor 3c.
　相手側アンテナ装置で発生した磁束φ４は、アンテナ装置１ｃにおいて、透磁率の高い磁性体４を集中的に通るような閉ループを形成する。磁性体４を通る磁束φ４により、コイル導体３ｃの第１コイル導体部３１ｃには、磁束φ４を打ち消すような誘導起電力が発生する。これにより、コイル導体３ｃには、電流ｉ４が流れる。 The magnetic flux φ4 generated in the partner antenna device forms a closed loop that intensively passes through the magnetic body 4 having high magnetic permeability in the antenna device 1c. Due to the magnetic flux φ4 passing through the magnetic body 4, an induced electromotive force that cancels the magnetic flux φ4 is generated in the first coil conductor portion 31c of the coil conductor 3c. As a result, the current i4 flows through the coil conductor 3c.
　ここで、実施形態３と同様、第１コイル導体部３１ｃの線幅δ１が太いため、第１コイル導体部３１ｃの線幅が細い場合に比べて、コイル導体３ｃに流れる電流ｉ４は大きくなる。これにより、アンテナ装置１ｃの通信特性を向上させることができる。 Here, as in the third embodiment, since the line width δ1 of the first coil conductor portion 31c is large, the current i4 flowing through the coil conductor 3c is larger than when the line width of the first coil conductor portion 31c is thin. Thereby, the communication characteristics of the antenna device 1c can be improved.
　また、実施形態３と同様、相手側アンテナ装置とは反対側に導電部材７が設けられているため、相手側アンテナ装置からの磁束φ４は、導電部材７側を通りにくくなり、透磁率の高い磁性体４を更に集中的に通る。これにより、磁性体４を通る磁束φ４が更に大きくなるので、コイル導体３ｃの第１コイル導体部３１ｃには、より大きな誘導起電力が発生する。その結果、コイル導体３ｃに流れる電流ｉ４は、より大きくなる。 Further, similar to the third embodiment, since the conductive member 7 is provided on the side opposite to the partner antenna device, the magnetic flux φ4 from the partner antenna device is less likely to pass through the conductive member 7 side, and the magnetic permeability is high. It passes through the magnetic body 4 more intensively. As a result, the magnetic flux φ4 passing through the magnetic body 4 is further increased, so that a larger induced electromotive force is generated in the first coil conductor portion 31c of the coil conductor 3c. As a result, the current i4 flowing through the coil conductor 3c becomes larger.
　さらに、実施形態３と同様、第２コイル導体部３２ｃに第４コイル導体部３４ｃが挿入されており、第２コイル導体部３２ｃよりも線幅の太い第１コイル導体部３１ｃには、第４コイル導体部３４ｃが挿入されていない。これにより、第１コイル導体部３１ｃに第４コイル導体部３４ｃが挿入されている場合に比べて、第１コイル導体部３１ｃが大きくなるので、第１コイル導体部３１ｃには、より大きな誘導起電力が発生する。その結果、第１コイル導体部３１ｃに第４コイル導体部３４ｃが挿入されている場合に比べて、コイル導体３ｃに流れる電流ｉ４は、より大きくなる。 Further, as in the third embodiment, the fourth coil conductor portion 34c is inserted in the second coil conductor portion 32c, and the fourth coil conductor portion 31c having a line width larger than that of the second coil conductor portion 32c has the fourth coil conductor portion 34c. The coil conductor portion 34c is not inserted. As a result, the first coil conductor portion 31c becomes larger than in the case where the fourth coil conductor portion 34c is inserted into the first coil conductor portion 31c. Electricity is generated. As a result, the current i4 flowing through the coil conductor 3c becomes larger than when the fourth coil conductor portion 34c is inserted in the first coil conductor portion 31c.
　（３）効果
　実施形態４に係るアンテナ装置１ｃでは、コイル導体３ｃのコイル開口３５ｃに磁性体４を挿入する工程が不要であるので、アンテナ装置１ｃを作りやすい。 (3) Effects The antenna device 1c according to the fourth embodiment does not require the step of inserting the magnetic body 4 into the coil opening 35c of the coil conductor 3c, and thus the antenna device 1c can be easily manufactured.
　（４）変形例
　実施形態４の変形例として、アンテナ装置１ｃは、導電部材７を備えていなくてもよい。 (4) Modified Example As a modified example of the fourth embodiment, the antenna device 1c may not include the conductive member 7.
　上記の各変形例に係るアンテナ装置１ｃにおいても、実施形態４に係るアンテナ装置１ｃと同様の効果を奏する。 The antenna device 1c according to each of the above modifications also has the same effect as the antenna device 1c according to the fourth embodiment.
　（実施形態５）
　実施形態５に係るアンテナ装置１ｄは、図１７に示すように、第１端子電極５及び第２端子電極６が磁性体４ｄから露出するように磁性体４ｄに凹所４３が形成されている点で、実施形態１に係るアンテナ装置１（図１参照）と相違する。なお、実施形態５に係るアンテナ装置１ｄに関し、実施形態１に係るアンテナ装置１と同様の構成要素については、同一の符号を付して説明を省略する。 (Embodiment 5)
In the antenna device 1d according to the fifth embodiment, as shown in FIG. 17, a recess 43 is formed in the magnetic body 4d so that the first terminal electrode 5 and the second terminal electrode 6 are exposed from the magnetic body 4d. Therefore, it is different from the antenna device 1 (see FIG. 1) according to the first embodiment. Regarding the antenna device 1d according to the fifth embodiment, the same components as those of the antenna device 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
　（１）アンテナ装置の構成
　アンテナ装置１ｄは、図１７に示すように、基材２ｄと、コイル導体３ｄと、磁性体４ｄと、第１端子電極５と、第２端子電極６とを備える。 (1) Configuration of Antenna Device As shown in FIG. 17, the antenna device 1d includes a base material 2d, a coil conductor 3d, a magnetic body 4d, a first terminal electrode 5, and a second terminal electrode 6.
　基材２ｄは、図１７に示すように、四角形の板状又は四角形のシート状に形成されている。基材２ｄは、実施形態１の基材２（図１参照）とは異なり、突出部２５（図１参照）を有しない。基材２ｄの材料は、実施形態１の基材２と同様、樹脂などの電気絶縁材料である。 The base material 2d is formed in a square plate shape or a square sheet shape as shown in FIG. Unlike the base material 2 (see FIG. 1) of the first embodiment, the base material 2d does not have the protrusion 25 (see FIG. 1). The material of the base material 2d is an electrically insulating material such as resin as in the base material 2 of the first embodiment.
　コイル導体３ｄは、実施形態１のコイル導体３（図１参照）と同様、図１７に示すように、基材２ｄにおいてスパイラル状に設けられている。コイル導体３ｄは、コイル開口３５を有する。コイル導体３の材料は、例えば、銅又はアルミニウムである。 Like the coil conductor 3 of the first embodiment (see FIG. 1), the coil conductor 3d is spirally provided on the base material 2d as shown in FIG. The coil conductor 3d has a coil opening 35. The material of the coil conductor 3 is, for example, copper or aluminum.
　コイル導体３ｄは、第１コイル導体部３１と、第２コイル導体部３２と、２つの第３コイル導体部３３と、第４コイル導体部３４ｄとを有する。 The coil conductor 3d has a first coil conductor portion 31, a second coil conductor portion 32, two third coil conductor portions 33, and a fourth coil conductor portion 34d.
　第４コイル導体部３４ｄは、第１コイル導体部３１に挿入されている。第４コイル導体部３４ｄは、第１コイル導体部３１に直交する方向に沿って設けられている。第４コイル導体部３４ｄは、実施形態１の第４コイル導体部３４（図１参照）に比べて、突出量が小さい。第４コイル導体部３４ｄの一部は磁性体４ｄと重なっており、第４コイル導体部３４ｄの残りは磁性体４ｄと重なっていない。 The fourth coil conductor portion 34d is inserted in the first coil conductor portion 31. The fourth coil conductor portion 34d is provided along the direction orthogonal to the first coil conductor portion 31. The fourth coil conductor portion 34d has a smaller protrusion amount than the fourth coil conductor portion 34 (see FIG. 1) of the first embodiment. Part of the fourth coil conductor portion 34d overlaps the magnetic body 4d, and the rest of the fourth coil conductor portion 34d does not overlap the magnetic body 4d.
　コイル導体３ｄは、第１端子電極５及び第１配線部５１がコイル開口３５内に位置するように巻回されている。第４コイル導体部３４ｄは、第１端子電極５及び第１配線部５１を取り囲むように位置している。 The coil conductor 3d is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35. The fourth coil conductor portion 34d is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
　磁性体４ｄは、図１７に示すように、四角形の板状又は四角形のシート状であり、凹所４３を有する。凹所４３は、第１端子電極５及び第２端子電極６が露出するように形成されている。 As shown in FIG. 17, the magnetic body 4d has a rectangular plate shape or a rectangular sheet shape, and has a recess 43. The recess 43 is formed so that the first terminal electrode 5 and the second terminal electrode 6 are exposed.
　磁性体４ｄの材料は、実施形態１の磁性体４（図１参照）と同様、フェライトなどの強磁性材料である。例えば、磁性体４ｄの材料は、焼結体フェライト、アモルファス磁性体、又は磁性シートである。 The material of the magnetic body 4d is a ferromagnetic material such as ferrite, like the magnetic body 4 of the first embodiment (see FIG. 1). For example, the material of the magnetic body 4d is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet.
　（２）効果
　実施形態５の発明に係るアンテナ装置１ｄでは、第１端子電極５及び第２端子電極６が磁性体４ｄから露出するように、磁性体４ｄに凹所４３が形成されている。これにより、プリント配線板等に接続されているスプリングピン（ポゴピン）に第１端子電極５及び第２端子電極６を接触させることができる。 (2) Effects In the antenna device 1d according to the invention of the fifth embodiment, the recess 43 is formed in the magnetic body 4d so that the first terminal electrode 5 and the second terminal electrode 6 are exposed from the magnetic body 4d. As a result, the first terminal electrode 5 and the second terminal electrode 6 can be brought into contact with the spring pin (pogo pin) connected to the printed wiring board or the like.
　（実施形態６）
　実施形態６に係るアンテナ装置１ｅは、図１８に示すように、基材２ｅに小さな突出部２５ｅが形成されており、かつ、磁性体４ｅに凹所４３が形成されている点で、実施形態１に係るアンテナ装置１（図１参照）と相違する。なお、実施形態６に係るアンテナ装置１ｄに関し、実施形態１に係るアンテナ装置１と同様の構成要素については、同一の符号を付して説明を省略する。 (Embodiment 6)
As shown in FIG. 18, the antenna device 1e according to the sixth embodiment is different in that the small protrusion 25e is formed on the base material 2e and the recess 43 is formed on the magnetic body 4e. 1 is different from the antenna device 1 (see FIG. 1). In addition, regarding the antenna device 1d according to the sixth embodiment, the same components as those of the antenna device 1 according to the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.
　（１）アンテナ装置の構成
　アンテナ装置１ｅは、図１８に示すように、基材２ｅと、コイル導体３ｅと、磁性体４ｅと、第１端子電極５と、第２端子電極６とを備える。 (1) Configuration of Antenna Device As shown in FIG. 18, the antenna device 1e includes a base material 2e, a coil conductor 3e, a magnetic body 4e, a first terminal electrode 5, and a second terminal electrode 6.
　基材２ｅは、図１８に示すように、板状又はシート状に形成されている。基材２ｅは、実施形態１の基材２（図１参照）と同様、突出部２５ｅを有する。ただし、突出部２５ｅは、突出部２５に比べて、突出量が小さい。基材２ｅの材料は、実施形態１の基材２と同様、樹脂などの電気絶縁材料である。 The base material 2e is formed in a plate shape or a sheet shape as shown in FIG. The base material 2e has a protrusion 25e, like the base material 2 of the first embodiment (see FIG. 1). However, the protrusion 25e has a smaller protrusion amount than the protrusion 25. The material of the base material 2e is an electrically insulating material such as resin as in the base material 2 of the first embodiment.
　コイル導体３ｅは、実施形態１のコイル導体３（図１参照）と同様、図１８に示すように、基材２ｅにおいてスパイラル状に設けられている。コイル導体３ｅは、コイル開口３５ｅを有する。コイル導体３の材料は、例えば、銅又はアルミニウムである。 Like the coil conductor 3 of the first embodiment (see FIG. 1), the coil conductor 3e is provided in a spiral shape on the base material 2e as shown in FIG. The coil conductor 3e has a coil opening 35e. The material of the coil conductor 3 is, for example, copper or aluminum.
　コイル導体３ｅは、第１コイル導体部３１ｅと、第２コイル導体部３２ｅと、２つの第３コイル導体部３３ｅと、第４コイル導体部３４ｅとを有する。 The coil conductor 3e has a first coil conductor portion 31e, a second coil conductor portion 32e, two third coil conductor portions 33e, and a fourth coil conductor portion 34e.
　第４コイル導体部３４ｅは、第１コイル導体部３１ｅに挿入されている。第４コイル導体部３４ｅは、第１コイル導体部３１ｅに直交する方向に沿って設けられている。第４コイル導体部３４ｅは、実施形態１の第４コイル導体部３４（図１参照）に比べて、突出量が小さい。第４コイル導体部３４ｅの一部は磁性体４ｅと重なっており、第４コイル導体部３４ｅの残りは磁性体４ｅと重なっていない。 The fourth coil conductor portion 34e is inserted in the first coil conductor portion 31e. The fourth coil conductor portion 34e is provided along the direction orthogonal to the first coil conductor portion 31e. The fourth coil conductor portion 34e has a smaller amount of protrusion than the fourth coil conductor portion 34 (see FIG. 1) of the first embodiment. Part of the fourth coil conductor portion 34e overlaps the magnetic body 4e, and the rest of the fourth coil conductor portion 34e does not overlap the magnetic body 4e.
　コイル導体３ｅは、第１端子電極５及び第１配線部５１がコイル開口３５ｅ内に位置するように巻回されている。第４コイル導体部３４ｅは、第１端子電極５及び第１配線部５１を取り囲むように位置している。 The coil conductor 3e is wound so that the first terminal electrode 5 and the first wiring portion 51 are located inside the coil opening 35e. The fourth coil conductor portion 34e is located so as to surround the first terminal electrode 5 and the first wiring portion 51.
　磁性体４ｅは、図１８に示すように、四角形の板状又は四角形のシート状であり、凹所４３ｅを有する。ただし、凹所４３ｅは、実施形態５の凹所４３（図１７参照）に比べて、奥行きが小さい。凹所４３ｅは、第１端子電極５及び第２端子電極６が露出するように形成されている。 As shown in FIG. 18, the magnetic body 4e has a rectangular plate shape or a rectangular sheet shape, and has a recess 43e. However, the recess 43e has a smaller depth than the recess 43 of the fifth embodiment (see FIG. 17). The recess 43e is formed so that the first terminal electrode 5 and the second terminal electrode 6 are exposed.
　磁性体４ｅの材料は、実施形態１の磁性体４（図１参照）と同様、フェライトなどの強磁性材料である。例えば、磁性体４ｅの材料は、焼結体フェライト、アモルファス磁性体、又は磁性シートである。 The material of the magnetic body 4e is a ferromagnetic material such as ferrite, like the magnetic body 4 of the first embodiment (see FIG. 1). For example, the material of the magnetic body 4e is a sintered ferrite, an amorphous magnetic body, or a magnetic sheet.
　（２）効果
　実施形態６に係るアンテナ装置１ｅでは、第１端子電極５及び第２端子電極６を露出させるように、磁性体４ｅに凹所４３ｅが形成されている。これにより、スプリングピン（ポゴピン）からの圧力があっても、スプリングピンが接触する第１端子電極５及び第２端子電極６と磁性体４ｅとが重なっていないので、磁性体４ｅには圧力が伝わりにくくなる。 (2) Effects In the antenna device 1e according to the sixth embodiment, the recess 43e is formed in the magnetic body 4e so as to expose the first terminal electrode 5 and the second terminal electrode 6. As a result, even if there is pressure from the spring pin (pogo pin), the first terminal electrode 5 and the second terminal electrode 6 contacting the spring pin do not overlap with the magnetic body 4e, so that the magnetic body 4e is not pressured. It becomes difficult to communicate.
　（実施形態７）
　実施形態７では、実施形態３に係るアンテナ装置１ｂが用いられている電子機器８について、図１９を参照して説明する。 (Embodiment 7)
In the seventh embodiment, an electronic device 8 in which the antenna device 1b according to the third embodiment is used will be described with reference to FIG.
　（１）電子機器の構成
　実施形態７に係る電子機器８は、図１９に示すように、アンテナ装置１ｂと、制御部８１と、プリント配線板８２と、バッテリ８３と、筐体８４とを備える。なお、実施形態７に係るアンテナ装置１ｂは、実施形態３に係るアンテナ装置１ｂと同様の構成及び機能を有する。 (1) Configuration of Electronic Device An electronic device 8 according to the seventh embodiment includes an antenna device 1b, a control unit 81, a printed wiring board 82, a battery 83, and a housing 84, as shown in FIG. .. The antenna device 1b according to the seventh embodiment has the same configuration and function as the antenna device 1b according to the third embodiment.
　電子機器８は、例えば、スマートフォン等の携帯端末、又は、スマートウォッチ等のウェアラブル端末、ヘッドフォン、又は補聴器である。図１９は、電子機器８として、スマートフォンを示す。 The electronic device 8 is, for example, a mobile terminal such as a smartphone, a wearable terminal such as a smart watch, headphones, or a hearing aid. FIG. 19 shows a smartphone as the electronic device 8.
　制御部８１は、プリント配線板８２の表面に実装された複数の回路素子８６で構成されており、アンテナ装置１ｂを制御する。バッテリ８３は、電子機器８を駆動するための電源である。筐体８４は、直方体状であり、アンテナ装置１ｂと制御部８１とプリント配線板８２とバッテリ８３とを収容する。つまり、筐体８４には、アンテナ装置１ｂが設けられている。 The control unit 81 includes a plurality of circuit elements 86 mounted on the surface of the printed wiring board 82, and controls the antenna device 1b. The battery 83 is a power source for driving the electronic device 8. The housing 84 has a rectangular parallelepiped shape, and houses the antenna device 1b, the control unit 81, the printed wiring board 82, and the battery 83. That is, the housing 84 is provided with the antenna device 1b.
　実施形態７に係る電子機器８では、コイル導体３ｂの第１コイル導体部３１ｂと第２コイル導体部３２とが並んでいる方向が筐体８４の長手方向Ｄ４に沿うように、アンテナ装置１ｂが筐体８４内に配置されている。 In the electronic device 8 according to the seventh embodiment, the antenna device 1b is arranged such that the direction in which the first coil conductor portion 31b and the second coil conductor portion 32 of the coil conductor 3b are aligned is along the longitudinal direction D4 of the housing 84. It is arranged in the housing 84.
　実施形態７に係る電子機器８では、アンテナ装置１ｂのうちコイル導体３ｂの第１コイル導体部３１ｂ及び第２コイル導体部３２ｂは、筐体８４の厚さ方向からの平面視で、導電部材であるシールドケース８５と重なるように設けられている。アンテナ装置１ｂは、例えば接着剤により、シールドケース８５又は筐体８４のうちのシールドケース８５と対向する内面に貼付されている。 In the electronic device 8 according to the seventh embodiment, the first coil conductor portion 31b and the second coil conductor portion 32b of the coil conductor 3b of the antenna device 1b are conductive members in a plan view from the thickness direction of the housing 84. It is provided so as to overlap with a certain shield case 85. The antenna device 1b is attached to the shield case 85 or the inner surface of the housing 84 facing the shield case 85 with an adhesive, for example.
　図１９に示すように第１コイル導体部３１ｂ及び第２コイル導体部３２ｂがシールドケース８５と重なるように設けられている状態において、アンテナ装置１ｂの導電部材７は、シールドケース８５となる。 As shown in FIG. 19, the conductive member 7 of the antenna device 1 b becomes the shield case 85 when the first coil conductor portion 31 b and the second coil conductor portion 32 b are provided so as to overlap with the shield case 85.
　（２）効果
　実施形態７に係る電子機器８では、アンテナ装置１ｂにおいて、第１端子電極５及び第２端子電極６が、第１主面４１の平面視で第１方向Ｄ１において磁性体４と重ならない突出領域１１に位置する。これにより、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 (2) Effects In the electronic device 8 according to the seventh embodiment, in the antenna device 1b, the first terminal electrode 5 and the second terminal electrode 6 are the same as the magnetic body 4 in the first direction D1 in the plan view of the first main surface 41. It is located in the projecting area 11 which does not overlap. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
　（３）変形例
　なお、実施形態７の変形例として、電子機器８では、コイル導体３ｂの第１コイル導体部３１ｂと第２コイル導体部３２ｂとが並んでいる方向が筐体８４の短手方向Ｄ５に沿うように、アンテナ装置１ｂが筐体８４内に配置されていてもよい。 (3) Modified Example As a modified example of the seventh embodiment, in the electronic device 8, the lateral direction in which the first coil conductor portion 31b and the second coil conductor portion 32b of the coil conductor 3b are arranged side by side in the lateral direction of the housing 84. The antenna device 1b may be arranged in the housing 84 along the direction D5.
　また、実施形態７の他の変形例として、電子機器８の導電部材７は、シールドケース８５に代えて、プリント配線板８２のグランド部分であってもよいし、バッテリ８３のバッテリケース８３１であってもよい。導電部材７がプリント配線板８２のグランド部分である場合、第１コイル導体部３１ｂ及び第２コイル導体部３２ｂは、筐体８４の厚さ方向からの平面視で、プリント配線板８２のグランド部分と重なるように設けられている。導電部材７がバッテリケース８３１である場合、第１コイル導体部３１ｂ及び第２コイル導体部３２ｂは、筐体８４の厚さ方向からの平面視で、バッテリケース８３１と重なるように設けられている。 Further, as another modification of the seventh embodiment, the conductive member 7 of the electronic device 8 may be the ground portion of the printed wiring board 82 instead of the shield case 85, or the battery case 831 of the battery 83. May be. When the conductive member 7 is the ground portion of the printed wiring board 82, the first coil conductor portion 31b and the second coil conductor portion 32b are the ground portion of the printed wiring board 82 in a plan view from the thickness direction of the housing 84. It is provided to overlap with. When the conductive member 7 is the battery case 831, the first coil conductor portion 31b and the second coil conductor portion 32b are provided so as to overlap the battery case 831 in a plan view from the thickness direction of the housing 84. ..
　電子機器８は、アンテナ装置１ｂに代えて、実施形態１に係るアンテナ装置１（図１参照）、実施形態２に係るアンテナ装置１ａ（図５参照）、又は、実施形態４に係るアンテナ装置１ｃ（図１３参照）を備えてもよい。あるいは、電子機器８は、アンテナ装置１ｂに代えて、実施形態５に係るアンテナ装置１ｄ（図１７参照）又は実施形態６に係るアンテナ装置１ｅ（図１８参照）を備えてもよい。 Instead of the antenna device 1b, the electronic device 8 includes an antenna device 1 according to the first embodiment (see FIG. 1), an antenna device 1a according to the second embodiment (see FIG. 5), or an antenna device 1c according to the fourth embodiment. (See FIG. 13). Alternatively, the electronic device 8 may include the antenna device 1d according to the fifth embodiment (see FIG. 17) or the antenna device 1e according to the sixth embodiment (see FIG. 18) instead of the antenna device 1b.
　上記の各変形例に係る電子機器８においても、実施形態７に係る電子機器８と同様の効果を奏する。 The electronic device 8 according to each of the above modifications also has the same effect as the electronic device 8 according to the seventh embodiment.
　以上説明した実施形態及び変形例は、本発明の様々な実施形態及び変形例の一部に過ぎない。また、実施形態及び変形例は、本発明の目的を達成できれば、設計等に応じて種々の変更が可能である。 The embodiments and modifications described above are only a part of various embodiments and modifications of the present invention. Further, the embodiment and the modified examples can be variously modified according to the design etc. as long as the object of the present invention can be achieved.
　（態様）
　以上説明した実施形態及び変形例より以下の態様が開示されている。 (Aspect)
The following aspects are disclosed from the embodiment and the modified examples described above.
　第１の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）と、磁性体（４；４ｄ；４ｅ）と、第１端子電極（５）及び第２端子電極（６）とを備える。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、第１方向（Ｄ１）に隣り合う第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）を含む。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）を有する。磁性体（４；４ｄ；４ｅ）は、第１主面（４１）及び第２主面（４２）を有する。第１端子電極（５）及び第２端子電極（６）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）の両端（第１端３６及び第２端３７）に電気的に接続されている。第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第１主面（４１）側に設けられている。第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第２主面（４２）側に設けられている。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、互いに重ならない。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）と重なる。第１端子電極（５）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）のコイル開口（３５；３５ｂ；３５ｃ；３５ｅ）内に設けられている。第１端子電極（５）及び第２端子電極（６）は、第１主面（４１）の平面視で磁性体（４）と重ならない領域（突出領域１１）に位置する。 The antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the first aspect includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), It comprises a first terminal electrode (5) and a second terminal electrode (6). The coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e). The coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e). The magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42). The first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e). There is. The first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e). The second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e). In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other. In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e). The first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) of the coil conductor (3; 3b; 3c; 3d; 3e). The first terminal electrode (5) and the second terminal electrode (6) are located in a region (protruding region 11) that does not overlap the magnetic body (4) in a plan view of the first main surface (41).
　第１の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）によれば、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 According to the antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the first aspect, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
　第２の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）と、磁性体（４；４ｄ；４ｅ）と、第１端子電極（５）及び第２端子電極（６）とを備える。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、第１方向（Ｄ１）に隣り合う第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）を含む。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）を有する。磁性体（４；４ｄ；４ｅ）は、第１主面（４１）及び第２主面（４２）を有する。第１端子電極（５）及び第２端子電極（６）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）の両端（第１端３６及び第２端３７）に電気的に接続されている。第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第１主面（４１）側に設けられている。第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第２主面（４２）側に設けられている。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、互いに重ならない。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）と重なる。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅは、第１主面（４１）の平面視で凸形状部（第４コイル導体部３４；３４ｂ；３４ｃ；３４ｄ；３４ｅ）を有する。第１端子電極（５）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）内であって凸形状部で囲まれた部分に設けられている。第１端子電極（５）及び第２端子電極（６）は、第１主面（４１）の平面視で磁性体（４；４ｄ；４ｅ）と重ならない領域に位置する。 The antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the second aspect includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), It comprises a first terminal electrode (5) and a second terminal electrode (6). The coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e). The coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e). The magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42). The first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e). There is. The first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e). The second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e). In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other. In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e). The coil conductors (3; 3b; 3c; 3d; 3e) have convex portions (fourth coil conductor portions 34; 34b; 34c; 34d; 34e) in a plan view of the first main surface (41). The electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) and in the portion surrounded by the convex shape portion: the first terminal electrode (5) and the second terminal electrode (6). Is located in a region that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41).
　第２の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）によれば、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 According to the antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the second aspect, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
　第３の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）では、第１又は２の態様において、第１主面（４１）は、通信相手側のアンテナと対向するように配置されている。第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）の線幅（δ１）は、第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）の線幅（δ２）よりも太い。 In the antenna device (1; 1a; 1b; 1c; 1d; 1e) according to the third aspect, in the first or second aspect, the first main surface (41) faces the antenna on the communication partner side. It is arranged. The line width (δ1) of the first coil conductor portion (31; 31b; 31c; 31e) is thicker than the line width (δ2) of the second coil conductor portion (32; 32b; 32c; 32e).
　第３の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）によれば、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）の通信特性を更に向上させることができる。 According to the antenna device (1; 1a; 1b; 1c; 1d; 1e) of the third aspect, the communication characteristics of the antenna device (1; 1a; 1b; 1c; 1d; 1e) can be further improved. ..
　第４の態様に係るアンテナ装置（１；１ａ；１ｂ；１ｃ）では、第１～３の態様のいずれか１つにおいて、上記領域は、突出領域（１１）である。突出領域（１１）は、第１主面（２１；２１ｃ）の平面視で磁性体（４）に対し第１方向（Ｄ１）に突出する。 In the antenna device (1; 1a; 1b; 1c) according to the fourth aspect, in any one of the first to third aspects, the area is a protruding area (11). The projecting region (11) projects in the first direction (D1) with respect to the magnetic body (4) in a plan view of the first main surface (21; 21c).
　第５の態様に係るアンテナ装置（１ｂ；１ｃ）では、第４の態様において、第１主面（４１）は、通信相手側のアンテナと対向するように配置されている。突出領域（１１）は、第２コイル導体部（３２ｂ；３２ｃ）と直交するように突出している。 In the antenna device (1b; 1c) according to the fifth aspect, in the fourth aspect, the first main surface (41) is arranged so as to face the antenna on the communication partner side. The projecting region (11) projects so as to be orthogonal to the second coil conductor portions (32b; 32c).
　第５の態様に係るアンテナ装置（１ｂ；１ｃ）によれば、通信相手側のアンテナに近くて通信相手側からの磁束（φ３；φ４）を受けやすい第１コイル導体部（３１ｂ；３１ｃ）を、電流（ｉ３；ｉ４）が発生する部分として、最大限に活用することができる。 According to the antenna device (1b; 1c) of the fifth aspect, the first coil conductor portion (31b; 31c) which is close to the antenna on the communication partner side and easily receives the magnetic flux (φ3; φ4) from the communication partner side is provided. , As the part where the current (i3; i4) is generated, it can be utilized to the maximum extent.
　第６の態様に係るアンテナ装置（１ａ；１ｂ；１ｃ）は、第１～５の態様のいずれか１つにおいて、導電部材（７）を更に備える。導電部材（７）は、第２主面（４２）と対向する。 The antenna device (1a; 1b; 1c) according to the sixth aspect further includes a conductive member (7) according to any one of the first to fifth aspects. The conductive member (7) faces the second major surface (42).
　第６の態様に係るアンテナ装置（１ａ；１ｂ；１ｃ）によれば、磁束（φ２；φ３；φ４）が導電部材（７）を避けて磁性体（４）を通るようになるので、集磁効果を向上させることができる。 According to the antenna device (1a; 1b; 1c) of the sixth aspect, the magnetic flux (φ2; φ3; φ4) comes to pass through the magnetic body (4) while avoiding the conductive member (7). The effect can be improved.
　第７の態様に係る電子機器（８）は、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）と、筐体（８４）とを備える。アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）と、磁性体（４；４ｄ；４ｅ）と、第１端子電極（５）及び第２端子電極（６）とを備える。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、第１方向（Ｄ１）に隣り合う第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）を含む。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）を有する。磁性体（４；４ｄ；４ｅ）は、第１主面（４１）及び第２主面（４２）を有する。第１端子電極（５）及び第２端子電極（６）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）の両端（第１端３６及び第２端３７）に電気的に接続されている。第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第１主面（４１）側に設けられている。第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第２主面（４２）側に設けられている。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、互いに重ならない。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）と重なる。第１端子電極（５）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）のコイル開口（３５；３５ｂ；３５ｃ；３５ｅ）内に設けられている。第１端子電極（５）及び第２端子電極（６）は、第１主面（４１）の平面視で磁性体（４；４ｄ；４ｅ）と重ならない領域（突出領域１１）に位置する。筐体（８４）には、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）が設けられている。 The electronic device (8) according to the seventh aspect includes an antenna device (1; 1a; 1b; 1c; 1d; 1e) and a housing (84). The antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), and a first terminal electrode (5). And a second terminal electrode (6). The coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e). The coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e). The magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42). The first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e). There is. The first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e). The second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e). In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other. In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e). The first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) of the coil conductor (3; 3b; 3c; 3d; 3e). The first terminal electrode (5) and the second terminal electrode (6) are located in a region (protrusion region 11) that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41). The housing (84) is provided with the antenna device (1; 1a; 1b; 1c; 1d; 1e).
　第７の態様に係る電子機器（８）によれば、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）において、第１端子電極（５）及び第２端子電極（６）が、第１主面（４１）の平面視で第１方向（Ｄ１）において磁性体（４）と重ならない領域（突出領域１１）に位置する。これにより、低コストかつ通信特性を安定させつつ、通信特性を向上させることができる。 According to the electronic device (8) of the seventh aspect, in the antenna device (1; 1a; 1b; 1c; 1d; 1e), the first terminal electrode (5) and the second terminal electrode (6) are The first principal surface (41) is located in a region (protruding region 11) that does not overlap the magnetic body (4) in the first direction (D1) in a plan view. Thereby, it is possible to improve the communication characteristics while stabilizing the communication characteristics at low cost.
　第８の態様に係る電子機器（８）は、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）と、筐体（８４）とを備える。アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）と、磁性体（４；４ｄ；４ｅ）と、第１端子電極（５）及び第２端子電極（６）とを備える。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、第１方向（Ｄ１）に隣り合う第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）を含む。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）を有する。磁性体（４；４ｄ；４ｅ）は、第１主面（４１）及び第２主面（４２）を有する。第１端子電極（５）及び第２端子電極（６）は、コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）の両端（第１端３６及び第２端３７）に電気的に接続されている。第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第１主面（４１）側に設けられている。第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）に対して第２主面（４２）側に設けられている。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、互いに重ならない。第１主面（４１）の平面視で、第１コイル導体部（３１；３１ｂ；３１ｃ；３１ｅ）及び第２コイル導体部（３２；３２ｂ；３２ｃ；３２ｅ）は、磁性体（４；４ｄ；４ｅ）と重なる。コイル導体（３；３ｂ；３ｃ；３ｄ；３ｅ）は、第１主面（４１）の平面視で凸形状部（第４コイル導体部３４）を有する。第１端子電極（５）は、コイル開口（３５；３５ｂ；３５ｃ；３５ｅ）内であって凸形状部で囲まれた部分に設けられている。第１端子電極（５）及び第２端子電極（６）は、第１主面（４１）の平面視で磁性体（４；４ｄ；４ｅ）と重ならない領域に位置する。筐体（８４）には、アンテナ装置（１；１ａ；１ｂ；１ｃ；１ｄ；１ｅ）が設けられている。 The electronic device (8) according to the eighth aspect includes an antenna device (1; 1a; 1b; 1c; 1d; 1e) and a housing (84). The antenna device (1; 1a; 1b; 1c; 1d; 1e) includes a coil conductor (3; 3b; 3c; 3d; 3e), a magnetic body (4; 4d; 4e), and a first terminal electrode (5). And a second terminal electrode (6). The coil conductors (3; 3b; 3c; 3d; 3e) include a first coil conductor portion (31; 31b; 31c; 31e) and a second coil conductor portion (32; 32b; 32c) that are adjacent to each other in the first direction (D1). 32e). The coil conductor (3; 3b; 3c; 3d; 3e) has a coil opening (35; 35b; 35c; 35e). The magnetic body (4; 4d; 4e) has a first main surface (41) and a second main surface (42). The first terminal electrode (5) and the second terminal electrode (6) are electrically connected to both ends (first end 36 and second end 37) of the coil conductor (3; 3b; 3c; 3d; 3e). There is. The first coil conductor portion (31; 31b; 31c; 31e) is provided on the first main surface (41) side with respect to the magnetic body (4; 4d; 4e). The second coil conductor portion (32; 32b; 32c; 32e) is provided on the second main surface (42) side with respect to the magnetic body (4; 4d; 4e). In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) do not overlap each other. In a plan view of the first main surface (41), the first coil conductor portion (31; 31b; 31c; 31e) and the second coil conductor portion (32; 32b; 32c; 32e) are magnetic bodies (4; 4d; 4e). The coil conductor (3; 3b; 3c; 3d; 3e) has a convex portion (fourth coil conductor portion 34) in a plan view of the first main surface (41). The first terminal electrode (5) is provided in the coil opening (35; 35b; 35c; 35e) and in the portion surrounded by the convex portion. The first terminal electrode (5) and the second terminal electrode (6) are located in a region that does not overlap the magnetic body (4; 4d; 4e) in a plan view of the first main surface (41). The housing (84) is provided with an antenna device (1; 1a; 1b; 1c; 1d; 1e).
　１，１ａ，１ｂ，１ｃ，１ｄ，１ｅ　アンテナ装置
　１１　突出領域
　３，３ｂ，３ｃ，３ｄ，３ｅ　コイル導体
　３１，３１ｂ，３１ｃ，３１ｅ　第１コイル導体部
　３２，３２ｂ，３２ｃ，３２ｅ　第２コイル導体部
　３４，３４ｂ，３４ｃ，３４ｄ，３４ｅ　第４コイル導体部（凸形状部）
　３５，３５ｂ，３５ｃ，３５ｅ　コイル開口
　３６　第１端
　３７　第２端
　４，４ｄ，４ｅ　磁性体
　４１　第１主面
　４２　第２主面
　４３，４３ｅ　凹所
　５　第１端子電極
　６　第２端子電極
　７　導電部材
　８　電子機器
　８３１　バッテリケース（導電部材）
　８４　筐体
　８５　シールドケース（導電部材）
　δ１，δ２　線幅
　Ｄ１　第１方向 1, 1a, 1b, 1c, 1d, 1e Antenna device 11 Projection area 3, 3b, 3c, 3d, 3e Coil conductor 31, 31b, 31c, 31e 1st coil conductor part 32, 32b, 32c, 32e 2nd coil conductor Part 34, 34b, 34c, 34d, 34e Fourth coil conductor part (convex shaped part)
35, 35b, 35c, 35e Coil opening 36 1st end 37 2nd end 4, 4d, 4e Magnetic body 41 1st main surface 42 2nd main surface 43, 43e Recess 5 1st terminal electrode 6 2nd terminal electrode 7 Conductive member 8 Electronic equipment 831 Battery case (conductive member)
84 case 85 shield case (conductive member)
δ1, δ2 Line width D1 First direction

Claims (8)

  1. 　第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含み、コイル開口を有するコイル導体と、
    　第１主面及び第２主面を有する磁性体と、
    　前記コイル導体の両端に電気的に接続されている第１端子電極及び第２端子電極と、を備え、
    　前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられており、
    　前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられており、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならず、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なり、
    　前記第１端子電極は、前記コイル開口内に設けられており、
    　前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する、
    　アンテナ装置。     A coil conductor that includes a first coil conductor portion and a second coil conductor portion that are adjacent to each other in the first direction and that has a coil opening;
    A magnetic body having a first main surface and a second main surface;
    A first terminal electrode and a second terminal electrode electrically connected to both ends of the coil conductor;
    The first coil conductor portion is provided on the first main surface side with respect to the magnetic body,
    The second coil conductor portion is provided on the second main surface side with respect to the magnetic body,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body,
    The first terminal electrode is provided in the coil opening,
    The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface,
    Antenna device.
  2. 　第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含み、コイル開口を有するコイル導体と、
    　第１主面及び第２主面を有する磁性体と、
    　前記コイル導体の両端に電気的に接続されている第１端子電極及び第２端子電極と、を備え、
    　前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられており、
    　前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられており、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならず、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なり、
    　前記コイル導体は、前記第１主面の平面視で凸形状部を有し、
    　前記第１端子電極は、前記コイル開口内であって前記凸形状部で囲まれた部分に設けられており、
    　前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する、
    　アンテナ装置。     A coil conductor that includes a first coil conductor portion and a second coil conductor portion that are adjacent to each other in the first direction and that has a coil opening;
    A magnetic body having a first main surface and a second main surface;
    A first terminal electrode and a second terminal electrode electrically connected to both ends of the coil conductor;
    The first coil conductor portion is provided on the first main surface side with respect to the magnetic body,
    The second coil conductor portion is provided on the second main surface side with respect to the magnetic body,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body,
    The coil conductor has a convex portion in a plan view of the first main surface,
    The first terminal electrode is provided in a portion surrounded by the convex portion within the coil opening,
    The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface,
    Antenna device.
  3. 　前記第１主面は、通信相手側のアンテナと対向するように配置されており、
    　前記第１コイル導体部の線幅は、前記第２コイル導体部の線幅よりも太い、
    　請求項１又は２に記載のアンテナ装置。     The first main surface is arranged so as to face the antenna of the communication partner,
    A line width of the first coil conductor portion is larger than a line width of the second coil conductor portion,
    The antenna device according to claim 1.
  4. 　前記領域は、前記第１主面の平面視で前記磁性体に対し前記第１方向に突出する突出領域である、
    　請求項１～３のいずれか１項に記載のアンテナ装置。     The region is a projecting region that projects in the first direction with respect to the magnetic body in a plan view of the first main surface,
    The antenna device according to any one of claims 1 to 3.
  5. 　前記第１主面は、通信相手側のアンテナと対向するように配置されており、
    　前記突出領域は、前記第２コイル導体部と直交するように突出している、
    　請求項４に記載のアンテナ装置。     The first main surface is arranged so as to face the antenna of the communication partner,
    The projecting region projects so as to be orthogonal to the second coil conductor portion,
    The antenna device according to claim 4.
  6. 　前記第２主面と対向する導電部材を更に備える、
    　請求項１～５のいずれか１項に記載のアンテナ装置。     Further comprising a conductive member facing the second main surface,
    The antenna device according to any one of claims 1 to 5.
  7. 　第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含み、コイル開口を有するコイル導体と、
    　第１主面及び第２主面を有する磁性体と、
    　前記コイル導体の両端に電気的に接続されている第１端子電極及び第２端子電極と、を備え、
    　前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられており、
    　前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられており、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならず、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なり、
    　前記第１端子電極は、前記コイル開口内に設けられており、
    　前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する、
    アンテナ装置と、
    　前記アンテナ装置が設けられている筐体と、を備える、
    　電子機器。     A coil conductor that includes a first coil conductor portion and a second coil conductor portion that are adjacent to each other in the first direction and that has a coil opening;
    A magnetic body having a first main surface and a second main surface;
    A first terminal electrode and a second terminal electrode electrically connected to both ends of the coil conductor;
    The first coil conductor portion is provided on the first main surface side with respect to the magnetic body,
    The second coil conductor portion is provided on the second main surface side with respect to the magnetic body,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body,
    The first terminal electrode is provided in the coil opening,
    The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface,
    An antenna device,
    A housing provided with the antenna device,
    Electronics.
  8. 　第１方向に隣り合う第１コイル導体部及び第２コイル導体部を含み、コイル開口を有するコイル導体と、
    　第１主面及び第２主面を有する磁性体と、
    　前記コイル導体の両端に電気的に接続されている第１端子電極及び第２端子電極と、を備え、
    　前記第１コイル導体部は、前記磁性体に対して前記第１主面側に設けられており、
    　前記第２コイル導体部は、前記磁性体に対して前記第２主面側に設けられており、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、互いに重ならず、
    　前記第１主面の平面視で、前記第１コイル導体部及び前記第２コイル導体部は、前記磁性体と重なり、
    　前記コイル導体は、前記第１主面の平面視で凸形状部を有し、
    　前記第１端子電極は、前記コイル開口内であって前記凸形状部で囲まれた部分に設けられている、
    　前記第１端子電極及び前記第２端子電極は、前記第１主面の平面視で前記磁性体と重ならない領域に位置する、
    アンテナ装置と、
    　前記アンテナ装置が設けられている筐体と、を備える、
    　電子機器。     A coil conductor that includes a first coil conductor portion and a second coil conductor portion that are adjacent to each other in the first direction and that has a coil opening;
    A magnetic body having a first main surface and a second main surface;
    A first terminal electrode and a second terminal electrode electrically connected to both ends of the coil conductor;
    The first coil conductor portion is provided on the first main surface side with respect to the magnetic body,
    The second coil conductor portion is provided on the second main surface side with respect to the magnetic body,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion do not overlap each other,
    In a plan view of the first main surface, the first coil conductor portion and the second coil conductor portion overlap the magnetic body,
    The coil conductor has a convex portion in a plan view of the first main surface,
    The first terminal electrode is provided in a portion surrounded by the convex portion within the coil opening,
    The first terminal electrode and the second terminal electrode are located in a region that does not overlap with the magnetic body in a plan view of the first main surface,
    An antenna device,
    A housing provided with the antenna device,
    Electronics.
PCT/JP2020/002682 2019-01-31 2020-01-27 Antenna device and electronic apparatus WO2020158638A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114784491A (en) * 2021-01-21 2022-07-22 Tdk株式会社 Coil component and wireless power transmission device provided with same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010109590A (en) * 2008-10-29 2010-05-13 Kyocera Corp Antenna structure, mobile communication terminal, and method of manufacturing antenna structure
JP2014212573A (en) * 2012-11-28 2014-11-13 株式会社村田製作所 Interface and communication device
WO2015147133A1 (en) * 2014-03-28 2015-10-01 株式会社村田製作所 Antenna device and electronic apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010109590A (en) * 2008-10-29 2010-05-13 Kyocera Corp Antenna structure, mobile communication terminal, and method of manufacturing antenna structure
JP2014212573A (en) * 2012-11-28 2014-11-13 株式会社村田製作所 Interface and communication device
WO2015147133A1 (en) * 2014-03-28 2015-10-01 株式会社村田製作所 Antenna device and electronic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114784491A (en) * 2021-01-21 2022-07-22 Tdk株式会社 Coil component and wireless power transmission device provided with same

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