WO2021085464A1 - Dispositif électronique et dispositif d'antenne - Google Patents

Dispositif électronique et dispositif d'antenne Download PDF

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Publication number
WO2021085464A1
WO2021085464A1 PCT/JP2020/040406 JP2020040406W WO2021085464A1 WO 2021085464 A1 WO2021085464 A1 WO 2021085464A1 JP 2020040406 W JP2020040406 W JP 2020040406W WO 2021085464 A1 WO2021085464 A1 WO 2021085464A1
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WIPO (PCT)
Prior art keywords
conductor
conductor portion
antenna device
main surface
electronic device
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Application number
PCT/JP2020/040406
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English (en)
Japanese (ja)
Inventor
宏充 伊藤
Original Assignee
株式会社村田製作所
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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 WO2021085464A1 publication Critical patent/WO2021085464A1/fr

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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
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • 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 relates to an electronic device and an antenna device.
  • the electronic device described in Patent Document 1 includes a radiation element of a UHF antenna and a ground conductor arranged to face the radiation element.
  • a reactance element is connected between the radiating element and the ground conductor.
  • the loop portion of the HF antenna is composed of a radiating element, a reactance element, and a ground conductor.
  • a part of the UHF antenna is shared as the HF antenna.
  • the HF antenna By the way, when the number of frequency bands to be used increases and the number of antennas to be used increases, it may be better to provide a plurality of antennas separately in order to ensure the performance of the plurality of antennas at the same time. However, in this case, it is often the case that a plurality of antennas are provided in the limited space. Therefore, it is necessary to arrange the plurality of antennas close to each other while suppressing the interference of the magnetic field between the plurality of antennas.
  • the present invention is an electronic device capable of arranging a plurality of antenna devices having different frequency bands close to each other while suppressing interference of magnetic fields between them, and is used in this electronic device. It is an object of the present invention to provide a possible antenna device.
  • the electronic device includes a first antenna device and a second antenna device.
  • the first antenna device uses a carrier frequency in the first frequency band.
  • the second antenna device uses a carrier frequency in a second frequency band different from the first frequency band.
  • the first antenna device includes a coil conductor and a magnetic material.
  • the coil conductor has a first conductor portion and a second conductor portion. In a plan view of the magnetic material, the second conductor portion is closer to the second antenna device than the first conductor portion.
  • the magnetic material has a first main surface and the second main surface facing each other.
  • One of the first conductor portion and the second conductor portion has a portion arranged on the first main surface side.
  • the other conductor portion of the first conductor portion and the second conductor portion has a portion that is not arranged on the first main surface side.
  • the antenna device is an antenna device that is used together with another antenna device and uses a frequency band different from the frequency band used by the other antenna device.
  • the antenna device includes a coil conductor and a magnetic material.
  • the coil conductor has a first conductor portion and a second conductor portion. In a plan view of the magnetic material, the second conductor portion is closer to the other antenna device than the first conductor portion.
  • the magnetic material has a first main surface and the second main surface facing each other.
  • One of the first conductor portion and the second conductor portion has a portion arranged on the first main surface side.
  • the other conductor portion of the first conductor portion and the second conductor portion has a portion that is not arranged on the first main surface side.
  • FIG. 1A is a plan view showing an electronic device according to the first embodiment.
  • FIG. 1B is a partially enlarged view of FIG. 1A.
  • FIG. 2 is a cross-sectional view taken along the line A1-A1 of FIG. 1A.
  • FIG. 3 is a cross-sectional view showing the electronic device according to the first modification of the first embodiment.
  • FIG. 4 is a plan view showing the electronic device according to the second embodiment.
  • FIG. 5 is a cross-sectional view taken along the line A2-A2 of FIG.
  • FIG. 6 is a cross-sectional view showing the electronic device according to the third embodiment.
  • FIG. 7 is a cross-sectional view showing the electronic device according to the fourth embodiment.
  • FIG. 1A is a plan view showing an electronic device according to the first embodiment.
  • FIG. 1B is a partially enlarged view of FIG. 1A.
  • FIG. 2 is a cross-sectional view taken along the line A1-A1 of FIG. 1A.
  • FIG. 8 is a cross-sectional view showing an electronic device according to a modified example of the fourth embodiment.
  • FIG. 9 is a plan view showing the electronic device according to the fifth embodiment.
  • FIG. 10 is a plan view showing the electronic device according to the first modification of the fifth embodiment.
  • FIG. 11 is a plan view showing the electronic device according to the second modification of the fifth embodiment.
  • FIG. 12 is a plan view showing the electronic device according to the sixth embodiment.
  • FIG. 13 is a plan view showing the electronic device according to the first modification of the sixth embodiment.
  • FIG. 14 is a plan view showing the electronic device according to the second modification of the sixth embodiment.
  • FIG. 15 is a plan view showing the electronic device according to the seventh embodiment.
  • FIG. 16 is a perspective view of the inside of the electronic device according to the eighth embodiment.
  • FIG. 17 is a perspective view of the inside of the electronic device according to the modified example of the eighth embodiment.
  • the “antenna device” is an antenna device used in the "wireless transmission system".
  • the “wireless transmission system” is a system that performs wireless transmission by magnetic field coupling with a transmission partner (antenna of an external device).
  • Transmission includes both the transmission and reception of signals and the transmission and reception of electric power.
  • wireless transmission system includes the meaning of both a short-range wireless communication system and a wireless power supply system. 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 for wireless transmission, and is ⁇ / 10 or less. Is. Therefore, the radiation efficiency of electromagnetic waves is low in the frequency band used for wireless transmission. Both ends of the coil conductor are connected to a power feeding circuit, and a current of substantially uniform magnitude flows through the current path of the antenna device, that is, the coil conductor.
  • short-range wireless communication used in the "antenna device" according to each embodiment, there is, for example, NFC (Near Field Communication).
  • the frequency band used in short-range wireless communication is, for example, the HF band, particularly 13.56 MHz and its vicinity.
  • the wireless power feeding method used in the "antenna device" there are, 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.
  • an electromagnetic induction type wireless power supply standard for example, there is a standard “Qi (registered trademark)” established by WPC (Wireless Power Consortium).
  • the frequency band used in the electromagnetic induction method is included in, for example, a range of 110 kHz or more and 205 kHz or less and a frequency band in the vicinity of the above range.
  • a magnetic field resonance type wireless power supply standard for example, there is a standard "AirFuel Resonant" established by AirFuel (registered trademark) and Alliance.
  • the frequency band used in the magnetic field resonance method is, for example, the 6.78 MHz band or the 100 kHz band.
  • the electronic device 1 includes a first antenna device 2 and a second antenna device 3.
  • the first antenna device 2 is an antenna device for transmitting and receiving radio waves used with an external device (for example, a reader / writer device) by using the carrier frequency of the first frequency band (for example, HF band).
  • the first antenna device 2 can be used as, for example, an antenna device for short-range wireless communication (NFC) or an antenna device for wireless charging.
  • the second antenna device 3 uses a carrier frequency of a second frequency band (for example, UHF band, SHF band, etc.) different from the first frequency band to transmit and receive radio waves to be used with another external device. Another antenna device.
  • the second antenna device 3 can be used, for example, as an antenna device for WiFi (registered trademark), BlueTooth (registered trademark), GPS or cellular.
  • the electronic device 1 is used together with the circuit board 4 (see FIG. 2).
  • the circuit board 4 is provided with, for example, a control circuit for controlling the first antenna device 2 and the second antenna device 3. That is, the circuit board 4 includes a control circuit that controls the first antenna device 2 and the second antenna device 3.
  • the circuit board 4 has a flat plate shape.
  • the circuit board 4 has main surfaces on both sides in the thickness direction.
  • the first antenna device 2 and the second antenna device 3 are arranged side by side (for example, adjacent to each other) in a plan view of the circuit board 4 on one main surface side of the circuit board 4, for example. In the first antenna device 2, the side opposite to the circuit board 4 is the main communication surface side.
  • the first antenna device 2 and the second antenna device 3 are arranged so as to be adjacent to each other, for example, by suppressing interference of magnetic fields between them. More specifically, in this electronic device 1, when the first antenna device 2 is arranged so as to be adjacent to the second antenna device 3, for example, it suppresses the interference of the magnetic field with the second antenna device 3. It is configured to do.
  • a first antenna device 2 will be described in detail.
  • the first antenna device 2 is a planar antenna configured in a planar shape.
  • the plan view dimensions of the first antenna device 2 are, for example, a horizontal dimension W1 of 15 mm or more and 25 mm or less, and a vertical dimension W2 of 25 mm or more and 40 mm or less (see FIG. 1).
  • the first antenna device 2 includes a coil conductor 21 and a magnetic body 22.
  • the coil conductor 21 is a member that magnetically couples with an external device (for example, a reader / writer device) of a communication partner.
  • the coil conductor 21 is made of a conductive material (for example, copper or a copper alloy).
  • the coil conductor 21 is formed by winding a linearly extending metal wire a plurality of times so as to have an opening 21a.
  • a plurality of coil conductors 21 are spirally wound so as to spread in a planar shape (that is, two-dimensionally).
  • the coil conductor 21 is composed of a plurality of winding portions 21s.
  • Pads 21g and 21h are connected to both ends of the coil conductor 21 so that they can be connected to a control circuit or the like.
  • the coil conductor 21 is two-dimensionally wound a plurality of times, but may be three-dimensionally wound a plurality of times in a spiral shape.
  • the coil conductor 21 is formed in a quadrangular ring shape. That is, in the plan view of the coil conductor 21, the outer shape of the coil conductor 21 is a quadrangle, and the opening 21a is also a quadrangle. Each winding portion 21s constituting the coil conductor 21 is also a quadrangle. That is, each winding portion 21s is composed of a plurality of wire element portions corresponding to each side of the polygon of the coil conductor 21.
  • the outer shape of the coil conductor 21 is a quadrangle, but the outer shape is not limited to a quadrangle, and other polygons, circles, ellipses, and the like may be similar.
  • the coil conductor 21 is flat. However, the coil conductor 21 may include a surface having a curved plane.
  • the coil conductor 21 has four conductor portions 211 to 214.
  • the plurality of conductor portions 211 to 214 have a one-to-one correspondence with the plurality of sides of the quadrangle of the coil conductor 21.
  • the conductor portions 211 to 214 are portions of each of the plurality of winding portions 21s of the coil conductor 21 in which the linear portions of the sections corresponding to the conductor portions 211 to 214 are bundled.
  • the four conductor portions 211 to 214 are linear, but are not limited to the linear shape, and may be curved, for example.
  • the conductor portion 211 (first conductor portion) and the conductor portion 213 (second conductor portion) are arranged so as to face each other with an interval (opening 21a). Both ends of the conductor portion 212 (third conductor portion) are connected to one end of each of the two conductor portions 211 and 213. Both ends of the conductor portion 214 (fourth conductor portion) are connected to the other ends of the two conductor portions 211 and 213.
  • the conductor portion 211 is arranged closest to the second antenna device 3, and the conductor portion 213 is arranged farthest from the second antenna device 3. That is, the conductor portion 211 is closer to the second antenna device 3 than the conductor portion 213.
  • the coil conductor 21 is arranged so that the conductor portion 211 is adjacent to the second antenna device 3. At that time, at least a part of the conductor portion 211 in the longitudinal direction may be adjacent to the second antenna device 3.
  • the line spacing between the conductor portions 211 to 214 is set to the line spacing D1 to D4, respectively.
  • the line spacing is the sum of the width d1 of the metal wires constituting the coil conductor 21 and the spacing (gap) d2 of the metal wires (see FIG. 1B).
  • the width d1 of the metal wire in the conductor portion 213 is larger than the width d1 of the metal wire in the other conductor portions 211,212,214.
  • the interval d2 of the metal wire elements is constant. In other words, the distance d2 of the metal wire elements is the same between the winding portions 21s and the same between the conductor portions 211 to 214.
  • the line spacing D3 at the conductor portion 213 is larger than the line spacing D1 at the conductor portion 211. Further, the line spacings D2 and D4 at the conductor portions 212 and 214 are the same as the line spacings D1, respectively.
  • the magnetic flux H1 is generated around each of the conductor portions 211 to 214 by passing an electric current through the coil conductor 21.
  • This magnetic flux H1 is used to magnetically couple with an external device that is a communication partner.
  • the magnetic body 22 is arranged on the side opposite to the communication surface side of the coil conductor 21.
  • the communication surface side of the first antenna device 2 is the side where the external device, which is the communication partner, exists in the thickness direction of the coil conductor 21.
  • the side of the coil conductor 21 opposite to the communication surface side will also be referred to as the back side of the coil conductor 21. That is, it can be said that the magnetic body 22 is arranged on the back side of the coil conductor 21.
  • the magnetic material 22 is formed in a flat plate shape or a sheet shape by, for example, ferrite.
  • Ferrite is a magnetic member formed by sintering iron oxide as a main component.
  • the magnetic material 22 may be formed of, for example, MnZn (manganese-zinc) ferrite or NiZn (nickel-zinc) ferrite.
  • the plan view shape of the magnetic body 22 is, for example, a rectangular shape having the same size as the plan view shape (rectangular shape) of the coil conductor 21.
  • the magnetic body 22 has a first main surface 22c and a second main surface 22d.
  • the first main surface 22c and the second main surface 22d are the main surfaces on both sides of the magnetic body 22 in the thickness direction.
  • the first main surface 22c is the main surface of the first antenna device 2 on the communication surface side.
  • the second main surface 22d is a main surface opposite to the first main surface 22c.
  • the magnetic body 22 is arranged on the back side of the coil conductor 21 as described above.
  • the planar coil conductor 21 is arranged so as to be parallel to the first main surface 22c of the magnetic body 22.
  • the conductor portions 212 to 214 of the coil conductor 21 are arranged on the first main surface 22c side of the magnetic body 22, and the conductor portion 211 is not arranged on the first main surface 22c side of the magnetic body 22.
  • "arranged on the first main surface 22c side” means that the first main surface 22c is arranged so as to overlap the first main surface 22c in a plan view and is arranged in the normal direction of the first main surface 22c. It means that it is closer to the first main surface 22c than the main surface 22d.
  • the magnetic body 22 is arranged so as not to overlap the entire conductor portion 211 but to overlap the entire conductor portion 213.
  • the entire conductor portion 211 is the entire width direction of the conductor portion 211 (left-right direction on the paper surface in FIG. 1) in a plan view of the magnetic body 22.
  • the entire conductor portion 213 is the entire width direction of the conductor portion 213 (left-right direction on the paper surface in FIG. 1) in a plan view of the magnetic body 22.
  • the magnetic body 22 is arranged so as to overlap the conductor portions 212 and 214.
  • the conductor portion 213 of the coil conductor 21 has a portion arranged on the first main surface 22c side of the magnetic body 22, and the conductor portion 211 is arranged on the first main surface 22c side of the magnetic body 22. Has no parts.
  • the conductor portion 213 of the coil conductor 21 has a portion arranged on the first main surface 22c side of the magnetic body 22, and the conductor portion 211 is not arranged on the first main surface 22c side of the magnetic body 22.
  • the portion it is possible to prevent the magnetic flux H2 (see FIG. 2) radiated from the second antenna device 3 from entering the magnetic body 22.
  • the magnetic loss of the magnetic flux H2 radiated from the second antenna device 3 in the magnetic body 22 can be reduced. In this way, it is possible to suppress the interference of the magnetic field between the first antenna device 2 and the second antenna device 3.
  • the inductance of the conductor portion 213 that overlaps with the magnetic body 22 increases as compared with the conductor portion 211 that does not overlap with the magnetic body 22. Therefore, of the magnetic flux H1 radiated from the coil conductor 21, the magnetic flux Ha formed around the conductor portion 213 is dominant as compared with the magnetic flux Hb formed around the conductor portion 211.
  • the first antenna device 2 is magnetically coupled with a sufficiently large coupling coefficient. Can be done. Therefore, in the plan view of the coil conductor 21, the directivity of the first antenna device 2 can be changed as compared with the case where both the conductor portion 211 and the conductor portion 213 are arranged on the first main surface 22c side.
  • the line spacing D3 of the conductor portion 213 is larger than the line spacing D1 of the conductor portion 211.
  • the magnetic flux Ha around the conductor portion 213 can be largely orbited.
  • the directivity of the first antenna device 2 can be further changed as compared with the case where both the conductor portion 211 and the conductor portion 213 are arranged on the first main surface 22c side. it can.
  • the conductor portion 211 (second conductor portion) is closer to the second antenna device 3 than the conductor portion 213 (first conductor portion), and the first conductor portion and the second conductor portion
  • One of the conductor portions 213 has a portion arranged on the first main surface 22c side of the magnetic body 22, and the other conductor portion 211 of the first conductor portion and the second conductor portion is the magnetic body 22. It has a portion that is not arranged on the first main surface 22c side of the above.
  • the interference of the magnetic field between the first antenna device 2 and the second antenna device 3 can be suppressed, and the first antenna device 2 and the second antenna device 3 can be arranged so as to be adjacent to each other (that is, close to each other). .. Further, in the plan view of the coil conductor 21, the directivity of the first antenna device 2 can be changed as compared with the case where both the conductor portion 211 and the conductor portion 213 are arranged on the first main surface 22c side.
  • Embodiment 1 is just one of the various embodiments of the present disclosure.
  • the aspect according to the first embodiment is not limited to being embodied in the electronic device 1.
  • the aspect according to the first embodiment may be embodied in the antenna device 2 constituting the electronic device 1.
  • the magnetic body 22 does not overlap the entire conductor portion 211, but as shown in FIG. 3, the magnetic body 22 does not have to overlap at least a part of the conductor portion 211. That is, at least a part of the conductor portion 211 may not be arranged on the first main surface 22c side of the magnetic body 22.
  • the directivity of the coil conductor 21 can be changed as compared with the case where both the conductor portion 211 and the conductor portion 213 are arranged on the first main surface 22c side.
  • the line spacing D3 of the conductor portion 213 and the line spacing D4 of the conductor portion 211 are different from each other, but the line spacing D3 of the conductor portion 213 and the line spacing D4 of the conductor portion 211 may be the same as each other. ..
  • the electronic device 1 according to the present embodiment will be described with reference to FIGS. 4 and 5.
  • the portion where the conductor portion 213, which is one of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is arranged on the first main surface 22c side of the magnetic body 22 is provided.
  • the conductor portion 211, which is the other of the first conductor portion and the second conductor portion, has a portion that is not arranged on the first main surface 22c side of the magnetic body 22, but in the second embodiment, the first conductor portion has a portion.
  • the conductor portion 211 which is one of the conductor portion and the second conductor portion, has a portion arranged on the first main surface 22c side of the magnetic body 22, and is the other of the first conductor portion and the second conductor portion.
  • a certain conductor portion 213 has a portion that is not arranged on the first main surface 22c side of the magnetic body 22.
  • the magnetic body 22 is arranged so as to be farther from the second antenna device 3 than the coil conductor 21, but in the second embodiment, the coil conductor 21 is arranged so as to be farther from the second antenna device 3 than the magnetic body 22. Arranged away from.
  • the magnetic body 22 is arranged so as to overlap the entire conductor portion 211 (second conductor portion) and not to overlap the entire conductor portion 213 (first conductor portion). Further, the magnetic body 22 is arranged so as to overlap the conductor portions 212 and 214. Further, in the present embodiment, the line spacing D1 of the conductor portion 211 is larger than the line spacing D3 of the conductor portion 213. Further, the line spacings D2 and D4 at the conductor portions 212 and 214 are the same as the line spacings D3, respectively.
  • the coil conductor 21 is arranged so as to be farther from the second antenna device 2 than the magnetic material 22. Therefore, it is possible to suppress the interference of the magnetic field between the first antenna device 2 and the second antenna device 3. As a result, deterioration of the performance of the second antenna device 3 can be suppressed.
  • a current is passed through the coil conductor 21 so that the magnetic flux H1 of the coil conductor 21 passes through the opening surface of the opening 21a of the coil conductor 21 from the back side toward the communication surface side.
  • the inductance of the conductor portion 211 that overlaps with the magnetic body 22 increases as compared with the conductor portion 213 that does not overlap with the magnetic body 22.
  • the magnetic flux Hb formed around the conductor portion 211 increases as compared with the magnetic flux Ha formed around the conductor portion 213.
  • the first antenna device 2 is sufficiently larger than the external device 100. Magnetic coupling can be performed with the coupling coefficient.
  • the electronic device 1 shown in FIG. 6 has the same configuration as the electronic device 1 shown in FIG.
  • the magnetic body 22 overlaps the entire conductor portion 211 (second conductor portion) of the coil conductor 21 and the conductor portion 213 (first conductor portion). It does not overlap all of the conductor part).
  • the magnetic material 22 is not limited to overlapping the entire conductor portion 213, and may not overlap at least a part of the conductor portion 213.
  • the conductor portion 211 which is one of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is the first main surface 22c of the magnetic body 22. It has a portion arranged on the side, and has a portion in which the conductor portion 213, which is the other of the first conductor portion and the second conductor portion, is not arranged on the first main surface 22c side of the magnetic body 22.
  • Reference numeral P4 shown in FIG. 6 indicates a lateral direction in the cross section shown in FIG.
  • the lateral direction P4 (predetermined direction) is a direction in which the conductor portion 211, the conductor portion 213, and the second antenna device 3 are arranged in this order.
  • the distance between the end 22a on the side of the second antenna device 3 in the magnetic body 22 and the end 211t on the side of the second antenna device 3 in the conductor portion 211 is defined as the first distance La. ..
  • the width of the opening 21a of the coil conductor 21 in the lateral direction P4 is defined as the second distance Lb.
  • the first distance La and the second distance Lb satisfy the relationship of Equation 1. That is, the first distance La is more than half of the second distance Lb.
  • the effect of the second embodiment can be exerted more effectively. That is, it is possible to more effectively suppress the interference of the magnetic field between the first antenna device 2 and the second antenna device 3. Further, the magnetic flux Hb around the conductor portion 211 (see FIG. 5) can be more effectively increased so as to spread to the outer center line P1 (see FIG. 5) on the conductor portion 213 side. As a result, the directivity of the first antenna device 2 can be effectively changed.
  • the code Lc in Equation 2 is the third distance.
  • the third distance will be referred to as a third distance Lc. That is, in this modification, the first distance La is more than half of the third distance Lc.
  • the third distance Lc is opposite to the end portion 213a of the conductor portion 213 opposite to the second antenna device 3 and the second antenna device 3 of the magnetic body 22 in the lateral direction P4. This is the distance from the side end 22b.
  • the conductor portion 211 which is the other of the first conductor portion and the second conductor portion, is the second main surface 22d of the magnetic body 22.
  • the difference is that it has a portion that is placed on the side. Further, it can be said that the magnetic material 22 extends to the communication surface side of the conductor portion 211 of the coil conductor 21.
  • the magnetic body 22 overlaps the entire conductor portion 213 (first conductor portion) of the coil conductor 21 and overlaps the entire conductor portion 211. Further, the conductor portion 213 is arranged on the first main surface 22c of the magnetic body 22, and the conductor portion 211 (second conductor portion) is arranged on the second main surface 22d of the magnetic body 22. That is, the magnetic body 22 is arranged on the communication surface side of the conductor portion 211. In other words, the magnetic body 22 extends to the communication surface side of the conductor portion 211.
  • the magnetic flux Ha formed around the conductor portion 213 spreads through the magnetic body 22 to the communication surface side of the conductor portion 211. ..
  • the magnetic flux Ha around the conductor portion 213 becomes more dominant, so that it is possible to more effectively suppress the interference of the magnetic field between the first antenna device 2 and the second antenna device 3.
  • the magnetic body 22 has a structure that penetrates the opening 21a of the coil conductor 21.
  • the conductor portion 213, which is one of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is arranged on the first main surface 22c side of the magnetic body 22.
  • the conductor portion 211, which is the other of the first conductor portion and the second conductor portion, has a portion that is not arranged on the first main surface 22c side of the magnetic body 22).
  • a structure is applied in which the body 22 penetrates the opening 21a of the coil conductor 21.
  • this modification as shown in FIG.
  • the conductor portion 211 which is the other of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is magnetic. It has a portion arranged on the first main surface 22c side of the body 22, and the conductor portion 213, which is one of the first conductor portion and the second conductor portion, is arranged on the first main surface 22c side of the magnetic body 22. A structure in which the magnetic material 22 penetrates the opening 21a of the coil conductor 21 is applied to the arrangement relationship (arrangement relationship having a portion not provided).
  • the magnetic body 22 overlaps the entire conductor portion 211 (second conductor portion) of the coil conductor 21 and is a conductor. It does not overlap a part of the part 213 (first conductor) (that is, it overlaps a part of the conductor part 213). Further, the conductor portion 211 is arranged on the first main surface 22c of the magnetic body 22, and the conductor portion 213 is arranged on the second main surface 22d of the magnetic body 22. That is, the magnetic body 22 is arranged on the communication surface side of the conductor portion 213. In other words, the magnetic body 22 extends to the communication surface side of the conductor portion 213.
  • the magnetic flux Hb formed around the conductor portion 211 spreads through the magnetic body 22 to the communication surface side of the conductor portion 213. ..
  • the magnetic body 22 does not contribute to communication, and the conductor portion 212 (second conductor portion) and the conductor portion 214 (third).
  • Each of the conductor portions) is formed so as not to overlap at least a part thereof.
  • the magnetic body 22 does not overlap at least a part of the conductor portion 211 (the other conductor portion) and contributes to communication, as in the first embodiment, the conductor portion 213 (one conductor). Part) overlaps with everything.
  • the longitudinal direction of the conductor portions 211 and 213 will be referred to as the first direction P3, and the longitudinal direction of the conductor portions 212 and 214 will be referred to as the second direction P4.
  • the second direction P4 is a direction orthogonal to the first direction P3.
  • the magnetic body 22 does not overlap at least a part of each of the conductor portions 212 and 214 in a plan view of the magnetic body 22.
  • the case where the magnetic body 22 does not overlap a part of each of the conductor portions 212 and 214 is illustrated.
  • the magnetic body 22 does not overlap a part (approximately half of the conductor portion 211 side) of the conductor portions 212 and 214, and the other portion (abbreviation of the conductor portion 213 side). The case where it overlaps with half) is shown in the figure.
  • the magnetic body 22 has a T-shaped plate shape in a plan view. More specifically, the magnetic material 22 has a first base portion 221 and a second base portion 222.
  • the first base portion 221 has a rectangular plate shape extending in the first direction P3.
  • the second base portion 222 has a rectangular plate shape extending from the center of the first direction P3 in the first base portion 221 along the second direction P4.
  • the first base portion 221 overlaps all of the conductor portions 213 and does not overlap at least a part of the conductor portions 212 and 214 as described above. Further, in the plan view of the magnetic body 22, the second base portion 222 overlaps the entire opening 21a of the coil conductor 21 and does not overlap the entire conductor portion 211. In the present embodiment, the second base portion 222 does not overlap the entire conductor portion 211, but may not overlap at least a part of the conductor portion 211.
  • the second direction P4 is also the direction (predetermined direction) in which the conductor portion 213 (first conductor portion), the conductor portion 211 (second conductor portion), and the second antenna device 3 are arranged in this order.
  • the second direction P4 is also referred to as a predetermined direction P4.
  • T1 is larger than the length T2 in the direction orthogonal to the predetermined direction P4 of the edge 22q closer to the conductor portion 211 (the other conductor portion) than the conductor portion 213 (one conductor portion).
  • the magnetic body 22 in a plan view of the magnetic body 22, is formed so as not to overlap at least a part of the conductor portions 212 and 214 that do not contribute to communication. Therefore, the inductance of the conductor portions 212 and 214 that do not contribute to communication can be reduced. As a result, the magnetic field coupling of the first antenna device 2 to the communication partner can be improved.
  • the first base portion 221 of the magnetic body 22 overlaps a part of the conductor portions 212 and 214.
  • the corner portion 221a of the first base portion 221 may be chamfered so that the first base portion 221 does not overlap all of the conductor portions 212 and 214.
  • the magnetic body 22 has a substantially Y-shape in a plan view by chamfering the corner portion 221a.
  • the magnetic body 22 becomes a rectangular shape in a plan view.
  • the conductor portion 213, which is one of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is arranged on the first main surface 22c side of the magnetic body 22. It is applied to the arrangement relation in which the conductor portion 211 which is the other of the first conductor portion and the second conductor portion has a portion which is not arranged on the first main surface 22c side of the magnetic body 22). However, the conductor portion 211, which is the other of the first conductor portion (conductor portion 213) and the second conductor portion (conductor portion 211), is arranged on the first main surface 22c side of the magnetic body 22. Even if it is applied to a portion having a portion, the conductor portion 213 which is one of the first conductor portion and the second conductor portion has a portion which is not arranged on the first main surface 22c side of the magnetic body 22). Good.
  • the magnetic body 22 is formed in a plan view T-shape having a first base portion 221 and a second base portion 222, as in the fifth embodiment. Then, in the plan view of the magnetic body 22, the first base portion 221 overlaps with all of the conductor portions 211 and does not overlap with at least a part of the conductor portions 212 and 214 (in FIG. 11, the first base portion 221 is The case where the conductor portions 212 and 214 do not partially overlap is shown). Further, in the plan view of the magnetic body 22, the second base portion 222 overlaps the entire opening 21a of the coil conductor 21 and does not overlap the entire conductor portion 213.
  • the second base portion 222 does not overlap the entire conductor portion 213, but may not overlap at least a part of the conductor portion 213. Also in this modification, the same effect as that of the fifth embodiment is obtained.
  • the magnetic body 22 may have a substantially Y shape in a plan view as in the modification of the first modification of the fifth embodiment.
  • the coil conductor 21 has two openings 21v and 21w, and magnetic fluxes H3 and H4 passing through the respective opening surfaces of the two openings 21v and 21w. Are wound multiple times so that they are in opposite phase to each other.
  • the coil conductor 21 has two winding portions 21A and 21B.
  • the two winding portions 21A and 21B are wound a plurality of times so as to have openings 21v and 21w, respectively.
  • One end of both ends of one winding portion 21A is connected to the pad 21g, and the other end is connected to one end of both ends of the other winding portion 21B.
  • the other winding portion 21B Of both ends of the other winding portion 21B, one end is connected to the above-mentioned one end of the one winding portion 21A, and the other end is connected to the pad 21h. That is, the two winding portions 21A and 21B are formed of one metal wire.
  • the two winding portions 21A and 21B are wound in opposite directions to each other.
  • the two winding portions 21A and 21B are rectangular rings having the same shape and the same size as each other in a plan view, for example.
  • the winding portion 21A has four conductor portions 211A to 214A
  • the winding portion 21B has four conductor portions 211B to 214B.
  • the two winding portions 21A and 21B are arranged so that the conductor portions 211A and 213B are adjacent to each other.
  • the coil conductor 21 has two intermediate conductor portions and two outer conductor portions.
  • the two intermediate conductor portions are the conductor portions 211A and 213B arranged between the two openings 21v and 21w in the two winding portions 21A and 21B.
  • the two outer conductor portions are the conductor portions 213A and 211B arranged on the opposite sides of the two winding portions 21A and 21B from the intermediate conductor portions 211A and 213B in each of the two openings 21v and 21w. ..
  • the intermediate conductor portion will also be referred to as an intermediate conductor portion 211A, 213B
  • the outer conductor portion will also be referred to as an outer conductor portion 213A, 211B.
  • the coil conductor 21 is arranged so that the opening 21w is closer to the second antenna device 3 than the opening 21v. In this arrangement state, the outer conductor portion 211B of the winding portion 21B is arranged adjacent to the second antenna device 3.
  • the magnetic body 22 has a rectangular flat plate shape. In a plan view of the magnetic body 22, the magnetic body 22 overlaps so as to straddle the two openings 21v and 21w. More specifically, in a plan view of the magnetic body 22, the magnetic body 22 overlaps all of the two intermediate conductor portions 211A and 213B of the coil conductor 21 and at least a part of each of the two outer conductor portions 213A and 211B. Does not overlap. In the example of FIG. 12, the magnetic material 22 does not overlap all of the two outer conductor portions 213A and 211B. Further, the magnetic material 22 overlaps, for example, all of the two openings 21v and 21w. Further, the magnetic body 22 overlaps all of the conductor portions 212A and 214A of the winding portion 21A and all of the conductor portions 212B and 214B of the winding portion 21B.
  • the directivity of the first antenna device 2 can be expanded in the direction in which the two openings 21v and 21w are lined up. As a result, the directivity can be changed, so that the degree of freedom in arranging the external device with respect to the coil conductor 21 can be improved.
  • the magnetic body 22 overlaps all of the conductor portions 212A, 214A, 212B, and 214B of the two winding portions 21A and 21B, respectively.
  • the magnetic body 22 may be formed so as not to overlap all of the conductor portions 212A, 214A, 212B, and 214B of the two winding portions 21A and 21B, respectively.
  • the magnetic body 22 in a plan view of the magnetic body 22, is formed so as not to overlap the conductor portions 212A, 214A, 212B, and 214B that do not contribute to communication. Therefore, the inductance of the conductor portions 212A, 214A, 212B, and 214B that do not contribute to communication can be reduced. As a result, in addition to the effect of the sixth embodiment, the magnetic field coupling of the first antenna device 2 to the communication partner can be improved.
  • each coil conductor 21 has a plurality of winding portions 21s wound in an 8-shaped shape. That is, the coil conductor 21 has two openings 21v and 21w, and is wound a plurality of times so that the magnetic fluxes H3 and H4 passing through the respective opening surfaces of the two openings 21v and 21w are in opposite phases to each other. .. Both ends of the coil conductor 21 are connected to pads 21g and 21h, respectively.
  • the coil conductor 21 of this modification has, for example, eight conductor portions 211a to 211h.
  • Each conductor portion is arranged in an eight-character order in the order of the conductor portion 211a, the conductor portion 211b, the conductor portion 211c, the conductor portion 211d, the conductor portion 211f, the conductor portion 211g, and the conductor portion 211h.
  • Each of the conductor portions 211a to 211h is a portion in which the corresponding wire element portions of the plurality of winding portions 21s are bundled.
  • the coil conductor 21 of the modified example 2 has two intermediate conductor portions and two outer conductor portions.
  • the two intermediate conductor portions are conductor portions 211g and 211c that are arranged between the two openings 21v and 21w of the coil conductor 21 and intersect with each other.
  • the intermediate conductor portions will also be referred to as intermediate conductor portions 211g and 211c.
  • the two outer conductor portions are the conductor portions 211a and 211e arranged on the opposite sides of the coil conductors 21 from the intermediate conductor portions 211c and 211g in the two openings 21v and 21w, respectively.
  • the outer conductor portion will also be referred to as the outer conductor portions 211a and 211e.
  • the coil conductor 21 is arranged so that the opening 21w is closer to the second antenna device 3 than the opening 21v. In this arrangement state, the outer conductor portion 211a of the coil conductor 21 is arranged adjacent to the second antenna device 3.
  • the magnetic body 22 has a rectangular flat plate shape. In a plan view of the magnetic body 22, the magnetic body 22 overlaps so as to straddle the two openings 21v and 21w. More specifically, in a plan view of the magnetic body 22, the magnetic body 22 overlaps all of the two intermediate conductor portions 211c and 211g of the coil conductor 21 and at least each of the two outer conductor portions 211a and 211e. It does not overlap in part. In the example of FIG. 14, the magnetic body 22 does not overlap all of the two outer conductor portions 211a and 211e. Further, the magnetic material 22 overlaps, for example, all of the two openings 21v and 21w. Further, the magnetic material 22 overlaps all of the conductor portions 211b, 211d, 211f, and 211h of the coil conductor 21.
  • the magnetic body 22 overlaps all of the conductor portions 212A, 214A, 212B, and 214B in the plan view of the magnetic body 22.
  • the magnetic body 22 does not have to overlap all of the conductor portions 212A, 214A, 212B, and 214B in the plan view of the magnetic body 22.
  • the electronic device 1 according to the present embodiment includes two second antenna devices 3A and 3B in the electronic device 1 according to the first embodiment.
  • the two second antenna devices 3A and 3B are arranged in a substantially L shape so that their longitudinal directions are orthogonal to each other.
  • the conductor portion 211 of the coil conductor 21 is arranged adjacent to the second antenna device 3A, and the conductor portion 212 of the coil conductor 21 is adjacent to the second antenna device 3B. Is arranged.
  • the magnetic body 22 has a rectangular plate shape in a plan view.
  • the magnetic body 22 is arranged so as to be farther from the second antenna device 3A than the coil conductor 21 and the magnetic body 22 is farther from the second antenna device 3B than the coil conductor 21. More specifically, the magnetic material 22 overlaps all of the conductor portions 213,214 and does not overlap at least a part of each of the conductor portions 211,212.
  • the first antenna device 2 can suppress the magnetic field from interfering with each of the two second antenna devices 3A and 3B. Further, the directivity of the first antenna device 2 can be changed from the central axis direction of the coil conductor 21 to the side opposite to the second antenna device 3A, and from the central axis direction of the coil conductor 21 to the second antenna device 3B. Can be changed to the other side.
  • the magnetic body 22 has a plate shape of a quadrangle in a plan view, but is not limited to the quadrangle in a plan view, and may be, for example, a triangle in a plan view.
  • the electronic device 1 is an electronic device 1 that performs wireless communication with an external device of a communication partner by using magnetic field coupling, and is, for example, a communication device, a smart watch, or a game device.
  • the electronic device 1 further includes a housing 81, a display unit, a circuit board 83, and a battery 85.
  • the housing 81 is an outer shell that houses the display unit, the circuit board 83, the battery 85, and the electronic device 1.
  • the housing 81 is made of, for example, a material (for example, resin) that allows a magnetic field to pass through.
  • the housing 81 has, for example, a hollow box shape having a rectangular shape in a plan view (for example, a flat box shape).
  • the housing 81 has a longitudinal direction P5 and a lateral direction P6 in a plan view.
  • the display unit is a device that displays predetermined information.
  • the display unit displays information related to communication between the electronic device 1 and the external device, such as the result of processing performed by the control circuit described later on the circuit board 83.
  • the display unit is a thin display device of liquid crystal or organic EL (Electro Luminescence).
  • the display unit is arranged in the housing 81 so as to face the opening of the front wall of the housing 81 (the back side of the paper surface in FIG. 16).
  • the circuit board 83 is a board provided with various electronic components 83c.
  • the various electronic components 83c form a control circuit that controls the display unit and the electronic device 1.
  • the circuit board 83 is arranged in the housing 81 on the back side of the display unit (front side of the paper surface in FIG. 16) and on one side in the longitudinal direction of the housing 81 (upper side of the paper surface in FIG. 16). ..
  • the circuit board 83 constitutes the circuit board 4 of the first embodiment.
  • the battery 85 is a storage battery that supplies electric power to the display unit, the circuit board 83, and the electronic device 1.
  • the battery 85 has a flat plate shape having a rectangular shape in a plan view.
  • the battery 85 is arranged, for example, on the back side of the display portion in the housing 81 on the other side in the longitudinal direction of the housing 81 (that is, the side opposite to the circuit board 83).
  • the electronic device 1 is the electronic device 1 according to the first embodiment, and includes a first antenna device 2 and a second antenna device 3.
  • the electronic device 1 is arranged on the back side of the circuit board 83 (the front side of the paper in FIG. 16) in the housing 81.
  • the electronic device 1 is arranged between the rear wall of the housing 81 and the circuit board 83.
  • the magnetic body 22 of the electronic device 1 is arranged on the front wall side of the housing 81 (the back side of the paper surface in FIG. 16), and the coil conductor 21 is arranged on the rear wall side of the housing 81 (in FIG. 16). It is located on the front side of the page).
  • the electronic device 1 is arranged at one end of the housing 81 in the longitudinal direction P5 (the upper end of the paper surface in FIG. 16), but the arrangement location of the electronic device 1 is not particularly limited.
  • the electronic device 1 may be fixed to the back surface of the rear wall of the housing 81 with double-sided tape or the like.
  • the electronic device 1 is arranged between the shield case and the rear wall of the housing 81. In this case, the electronic device 1 may be fixed to the shield case.
  • the electronic device 1 can be configured as, for example, a communication device, a smart watch, a game device, or the like.
  • the first antenna device 2 and the second antenna device 3 can be arranged so as to be adjacent to each other (that is, close to each other) so that the magnetic fields do not interfere with each other.
  • the magnetic field interferes with the second antenna device 3. Can be suppressed.
  • the first antenna device 2 and the second antenna device 3 are at one end of the lateral direction P6 in the housing 81 (in FIG. 17). It is placed at the right edge of the page). More specifically, in the lateral direction P6 of the housing 81, the second antenna device 3 is arranged closer to the end portion of the housing 81 in the lateral direction P6 than the first antenna device 2. Further, in the lateral direction P6 of the housing 81, the first antenna device 2 is arranged closer to the center line S1 of the lateral direction P6 in the housing 81 than the second antenna device 3. That is, the first antenna device 2 is arranged between the center line S1 and the second antenna device 3.
  • the directivity (peak position of the transmission / reception intensity) of the first antenna device 2 is such that the peak position of the transmission / reception intensity of the first antenna device 2 is near the center line S1.
  • the electronic device 1 When performing short-range wireless communication with an external device of the communication partner, the electronic device 1 is brought close to the external device of the communication partner so that the external device is arranged on the center line S1 on the rear surface of the electronic device 1. .. At this time, the peak position of the transmission / reception intensity of the external device is arranged on the center line S1 of the electronic device 1. Further, as described above, in the electronic device 1, the directivity of the first antenna device 2 is arranged so that the peak position of the transmission / reception intensity of the first antenna device 2 is near the center line S1. Therefore, the first antenna device 2 magnetically couples with the external device arranged on the center line S1 on the rear surface of the electronic device 1 with a sufficiently strong coupling coefficient. Therefore, in the electronic device 1, even if the first antenna device 2 is arranged between the center line S1 and the second antenna device 3, the first antenna device 2 is used to communicate with the external device of the communication partner. Good wireless communication can be performed.
  • the electronic device (1) includes a first antenna device (2) and a second antenna device (3).
  • the first antenna device (2) uses the carrier frequency of the first frequency band (for example, the HF band).
  • the second antenna device (3) uses a carrier frequency of a second frequency band (for example, UHF band) different from the first frequency band.
  • the first antenna device (2) includes a coil conductor (21) and a magnetic material (22).
  • the coil conductor (21) has a first conductor portion (213) and a second conductor portion (211). In the plan view of the magnetic material (22), the second conductor portion (211) is closer to the second antenna device (3) than the first conductor portion (213).
  • the magnetic material (22) has a first main surface (22c) and a second main surface (22d) facing each other.
  • One of the first conductor portion (213) and the second conductor portion (211) has a portion arranged on the first main surface (22c) side.
  • the other conductor portion of the first conductor portion (213) and the second conductor portion (211) has a portion that is not arranged on the first main surface (22c).
  • the first antenna device (2) and the second antenna device (3) are combined by suppressing the interference of the magnetic field between the first antenna device (2) and the second antenna device (3). Can be placed.
  • the electronic device (1) according to the second aspect has a direction in which the first conductor portion (213), the second conductor portion (211), and the second antenna device (3) are arranged in this order in the first aspect.
  • the predetermined direction (P4) In the predetermined direction (P4), the end portion (22a) on the side of the second antenna device (3) in the magnetic material (22) and the end portion on the side of the second antenna device (3) in the second conductor portion (211).
  • the distance from (211t) is defined as the first distance (La).
  • the width of the opening (21a) of the coil conductor (21) in the predetermined direction (P4) is defined as the second distance (Lb).
  • the first distance (La) is more than half of the second distance (Lb).
  • the directivity of the first antenna device (2) can be effectively changed from the central axis direction of the coil conductor (21) to the side opposite to the second antenna device (3) with a simple structure. Can be done.
  • the electronic device (1) according to the third aspect has a direction in which the first conductor portion (213), the second conductor portion (211), and the second antenna device (3) are arranged in this order in the first aspect.
  • the predetermined direction (P4) In the predetermined direction (P4), the end portion (22a) on the side of the second antenna device (3) in the magnetic material (22) and the end portion on the side of the second antenna device (3) in the second conductor portion (211).
  • the distance from (211t) is defined as the first distance (La).
  • the end portion (213a) of the first conductor portion (213) opposite to the second antenna device (3) and the second antenna device (3) of the magnetic material (22) are opposite to each other.
  • the distance from the side end (22b) is defined as the third distance (Lc).
  • the first distance (La) is more than half of the third distance (Lc).
  • the directivity of the first antenna device (2) can be effectively changed from the central axis direction of the coil conductor (21) to the side opposite to the second antenna device (3) with a simple structure. Can be done.
  • the electronic device (1) according to the fourth aspect has a portion arranged on the side of the second main surface (22d) in any one of the first to third aspects, the other conductor portion.
  • the first coil device can be further miniaturized while maintaining the coupling coefficient of the magnetic field coupling with the communication partner.
  • the magnetic body (22) is the other conductor portion described above in a plan view of the magnetic body (22). Does not overlap with all of.
  • the coil conductor (21) is the third conductor portion (212) and the fourth conductor portion (214). And have. Both ends of the third conductor portion (212) are connected to one end of the first conductor portion (213) and one end of the second conductor portion (211), respectively. Both ends of the fourth conductor portion (214) are connected to the other end of the first conductor portion (213) and the other end of the second conductor portion (211), respectively.
  • the magnetic material (22) does not overlap at least a part of each of the third conductor portion (212) and the fourth conductor portion (214) in the plan view of the magnetic material (22).
  • the induction of the conductor portions (212, 214) that do not contribute to communication among the conductor portions (211 to 214) of the coil conductor (21) can be reduced.
  • the coupling coefficient of the magnetic field coupling with the communication partner can be improved.
  • the first conductor portion (213), the second conductor portion (211), and the second antenna device (3) are arranged in this order.
  • the predetermined direction (P4) Of the edges of the magnetic material (22), the length (T1) of the edge (22p) closer to one conductor than the other conductor in the direction orthogonal to the predetermined direction (P4) is one. It is larger than the length (T2) of the edge (22q) closer to the other conductor portion than the conductor portion in the direction orthogonal to the predetermined direction (P4).
  • the shape of the coil conductor (21) for example, a T-shape in a plan view or a Y-shape in a plan view can be adopted.
  • the coil conductor (21) has two openings (21v, 21w) and two openings (21v, 21w).
  • the magnetic fluxes (H3, H4) passing through each opening surface of 21v, 21w) are wound so as to be in opposite phase to each other.
  • the coil conductor (21) has an intermediate conductor portion (211A, 213B) and two outer conductor portions (213A, 211B).
  • the intermediate conductor portions (211A, 213B) are arranged between the two openings (21v, 21w).
  • the two outer conductors (213A, 211B) are arranged on opposite sides of the intermediate conductors (211A, 213B) in each of the two openings (21v, 21w).
  • the intermediate conductor portion (211A, 213B) becomes the above-mentioned one conductor portion, and each of the two outer conductor portions (213A, 211B) becomes the above-mentioned other conductor portion.
  • the directivity of the coil conductor (21) can be expanded in the direction in which the two openings (21v, 21w) are lined up.
  • the electronic device (1) according to the ninth aspect is the housing (81) accommodating the first antenna device (2) and the second antenna device (3) in any one of the first to eighth aspects. ) Is further provided.
  • the housing (81) has a longitudinal direction (P5) and a lateral direction (P6).
  • the second antenna device (3) is arranged closer to the end portion of the housing (81) in the lateral direction (P6) than the first antenna device (2).
  • the first antenna device (2) is arranged closer to the center line (S1) in the lateral direction (P6) in the housing (81) than the second antenna device (3). ing.
  • the second antenna device (3) is placed in the lateral direction (P6) in the housing (81) rather than the first antenna device (2).
  • the first antenna device (2) can be arranged closer to the center line (S1) in the lateral direction (P6) of the housing (81) than the second antenna device (3).
  • the antenna device (2) is an antenna device that is used together with another antenna device (3) and uses a frequency band different from the frequency band used by the other antenna device (3).
  • the antenna device (2) includes a coil conductor (21) and a magnetic material (22).
  • the coil conductor (21) has a first conductor portion (213) and a second conductor portion (211).
  • the second conductor portion (211) is closer to the other antenna device (3) than the first conductor portion (213).
  • the magnetic material (22) has a first main surface (22c) and a second main surface (22d) facing each other.
  • One of the first conductor portion (213) and the second conductor portion (211) has a portion arranged on the first main surface (22c) side.
  • the other conductor portion of the first conductor portion (213) and the second conductor portion (211) has a portion that is not arranged on the first main surface (22c).
  • the antenna device (2) can be arranged together with the other antenna device (3) by suppressing the interference of the magnetic field between the other antenna devices (3).

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  • Details Of Aerials (AREA)

Abstract

L'invention concerne un dispositif électronique qui permet à de multiples dispositifs d'antenne ayant différentes bandes de fréquence d'être plus proches l'un de l'autre tout en supprimant l'interférence de champ magnétique entre ceux-ci. Ce dispositif électronique (1) comporte un premier dispositif d'antenne (2) et un second dispositif d'antenne (3). Le premier dispositif d'antenne (2) comporte un conducteur de bobine (21) et un corps magnétique (22). Le conducteur de bobine (21) comprend une partie de conducteur (213) et une partie de conducteur (211). Dans une vue en plan du corps magnétique (22), la seconde partie de conducteur (211) est plus proche du second dispositif d'antenne (3) que la première partie de conducteur (213) Le corps magnétique (22) présente une première surface primaire (22c) et une seconde surface principale (22d) qui sont opposées l'une à l'autre. L'une de la première partie de conducteur (213) et de la seconde partie de conducteur (211) a une partie qui est disposée sur le côté de la première surface primaire (22c). L'autre élément parmi la première partie de conducteur (213) et la seconde partie de conducteur (211) a une partie qui n'est pas disposée sur la première surface primaire (22c).
PCT/JP2020/040406 2019-10-31 2020-10-28 Dispositif électronique et dispositif d'antenne WO2021085464A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320571A (ja) * 2003-04-18 2004-11-11 Mitsubishi Materials Corp Ｒｆｉｄ機能付き携帯機器
JP2012147407A (ja) * 2010-12-24 2012-08-02 Murata Mfg Co Ltd アンテナ装置、アンテナ付きバッテリーパックおよび通信端末装置
WO2013035713A1 (fr) * 2011-09-09 2013-03-14 株式会社村田製作所 Dispositif d'antenne et dispositif de terminal de communication
JP2013081072A (ja) * 2011-10-04 2013-05-02 Murata Mfg Co Ltd アンテナ装置および通信端末装置
WO2014083990A1 (fr) * 2012-11-28 2014-06-05 株式会社村田製作所 Interface et dispositif de communications
WO2015147133A1 (fr) * 2014-03-28 2015-10-01 株式会社村田製作所 Dispositif d'antenne et appareil électronique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320571A (ja) * 2003-04-18 2004-11-11 Mitsubishi Materials Corp Ｒｆｉｄ機能付き携帯機器
JP2012147407A (ja) * 2010-12-24 2012-08-02 Murata Mfg Co Ltd アンテナ装置、アンテナ付きバッテリーパックおよび通信端末装置
WO2013035713A1 (fr) * 2011-09-09 2013-03-14 株式会社村田製作所 Dispositif d'antenne et dispositif de terminal de communication
JP2013081072A (ja) * 2011-10-04 2013-05-02 Murata Mfg Co Ltd アンテナ装置および通信端末装置
WO2014083990A1 (fr) * 2012-11-28 2014-06-05 株式会社村田製作所 Interface et dispositif de communications
WO2015147133A1 (fr) * 2014-03-28 2015-10-01 株式会社村田製作所 Dispositif d'antenne et appareil électronique

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