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WO2018139519A1 - Dispositif d'antenne, dispositif de transmission sans contact et système de transmission sans contact - Google Patents

Dispositif d'antenne, dispositif de transmission sans contact et système de transmission sans contact Download PDF

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Publication number
WO2018139519A1
WO2018139519A1 PCT/JP2018/002230 JP2018002230W WO2018139519A1 WO 2018139519 A1 WO2018139519 A1 WO 2018139519A1 JP 2018002230 W JP2018002230 W JP 2018002230W WO 2018139519 A1 WO2018139519 A1 WO 2018139519A1
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WO
WIPO (PCT)
Prior art keywords
antenna
coil antenna
transmission system
coil
circuit
Prior art date
Application number
PCT/JP2018/002230
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English (en)
Japanese (ja)
Inventor
末定　剛
博宣 高橋
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201890000454.0U priority Critical patent/CN210182579U/zh
Priority to JP2018551477A priority patent/JP6443608B1/ja
Publication of WO2018139519A1 publication Critical patent/WO2018139519A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/48—Transceivers

Definitions

  • the present invention relates to an antenna device applied to a contactless transmission system, a contactless transmission device including the antenna device, and a contactless transmission system.
  • Patent Document 1 discloses an antenna device having a structure in which a first coil conductor is used as a coil for non-contact communication, and a first coil conductor and a second coil conductor are connected in series and used as a coil for non-contact power transmission. Has been.
  • the antenna device shown in Patent Document 1 since the two coil conductors, the first coil conductor and the second coil conductor, are provided for use in non-contact power transmission, the area occupied by the antenna device is large. Further, only the first coil conductor is used during non-contact communication. However, the first coil conductor and the second coil conductor are likely to interfere with each other, which may deteriorate the characteristics of the antenna.
  • the above-mentioned problem is not limited to the antenna device shared by the contactless communication system and the contactless power transmission system, but similarly occurs in antenna devices used in a plurality of contactless transmission systems having different systems.
  • An object of the present invention is to provide an antenna device that is used in a non-contact transmission system and is easy to miniaturize and avoids deterioration of antenna characteristics, a non-contact transmission device including the antenna device, and a non-contact transmission system.
  • the antenna device of the present invention A first coil antenna; A second coil antenna having both ends connected to a circuit for a second contactless transmission system; A switching circuit for switching between a first state in which a first contactless transmission system circuit is electrically connected to both ends of the first coil antenna and a second state in which both ends of the first coil antenna are electrically connected; Have Transmission in the first contactless transmission system is performed in the first state, and the second coil antenna and the first coil antenna are magnetically coupled in the second state to transmit in the second contactless transmission system. Is performed.
  • the first coil antenna acts as a coil antenna for the first contactless transmission system that is directly connected to the circuit for the first contactless transmission system.
  • the first coil antenna is magnetically coupled to the second coil antenna and acts as an antenna for the second contactless transmission system together with the second coil antenna.
  • the first coil antenna is a planar coil antenna, and the winding axis of the second coil antenna is orthogonal to the winding axis of the first coil antenna, and is a plan view of the first coil antenna. It is preferable that a part of the first coil antenna overlaps with the second coil antenna. With this structure, the coupling coefficient between the first coil antenna and the second coil antenna is increased, and the action of the first coil antenna as a booster antenna is increased.
  • both ends of the first coil antenna are connected via a capacitor, and the second frequency used in the second contactless transmission system between the first coil antenna and the capacitor.
  • a resonance loop that resonates in the band is preferably configured. As a result, the current flowing through the resonance loop can be increased, and the second non-contact transmission system functions as a high-efficiency, low-loss antenna.
  • the antenna device further includes a control unit that controls the switching circuit, the first contactless transmission system and the second contactless transmission system can be easily switched by the control signal.
  • the switching circuit is connected to the first contactless transmission system.
  • You may comprise with the inductor connected in series between the circuit for transmission systems, and the said 1st coil antenna, and the capacitor connected between the both ends of the said 1st coil antenna. This eliminates the need for the switch and its control circuit.
  • a conductive member disposed on the same side as the second coil antenna with respect to the first coil antenna is further provided, the first coil antenna has a first coil opening, and the second coil antenna is a second coil antenna.
  • a coil opening, and at least a part of the conductive member overlaps the first coil opening in a plan view of the first coil antenna, and the conductive member is a plan view of the second coil opening. It preferably overlaps at least part of the second coil opening.
  • the conductive member is disposed at a position where winding axes of the second coil antenna intersect. This further effectively reduces unnecessary coupling between the second coil antenna and the counterpart antenna of the first contactless transmission system.
  • a contactless transmission device includes the antenna device according to the above (1) to (7), the first contactless transmission system circuit connected to the antenna device, and the second contactless transmission. A system circuit.
  • the first contactless transmission system is a power transmission system and the second contactless transmission system is a short-range communication system, it is applied to both the power transmission system and the short-range communication system.
  • Electronic equipment can be miniaturized.
  • the first contactless transmission system circuit is a power receiving circuit for a power transmission system and the second contactless transmission system circuit is a transmission / reception circuit for a short-range communication system, charging is performed by the power transmission system.
  • a small electronic device that performs communication (transmission / reception) in a short-range communication system can be configured.
  • the contactless transmission system of the present invention includes: The non-contact transmission device according to (9) or (10), A counterpart device of the power transmission system comprising a counterpart antenna of the power transmission system that is magnetically coupled to the first coil antenna; A counterpart device of the short-range communication system comprising a counterpart antenna of the short-range communication system that is magnetically coupled to the first coil antenna; Is provided.
  • an antenna device, a non-contact transmission device, and a non-contact transmission system including the antenna device, which are used in a non-contact transmission system and are easy to miniaturize and avoid deterioration of antenna characteristics, are configured.
  • FIG. 1A and 1B are circuit diagrams of the antenna device 101 and the non-contact transmission device 201 according to the first embodiment.
  • FIG. 2 is a plan view showing the shapes and positional relationships of the first coil antenna 1 and the second coil antenna 22.
  • FIG. 3 is an exploded perspective view of the second coil antenna 22.
  • FIG. 4 is a cross-sectional view of the second coil antenna 22.
  • FIG. 5A and FIG. 5B are diagrams illustrating how the antenna device according to the present embodiment is coupled to the counterpart antenna.
  • 6A and 6B are circuit diagrams of the antenna device 102 and the non-contact transmission device 202 according to the second embodiment.
  • 7A and 7B are circuit diagrams of the antenna device 103 and the non-contact transmission device 203 according to the third embodiment.
  • FIG. 8A and 8B are circuit diagrams of the antenna device 104 and the non-contact transmission device 204 according to the fourth embodiment.
  • FIG. 9A and FIG. 9B are circuit diagrams of another antenna device 104A and a non-contact transmission device 204A according to the fourth embodiment.
  • FIG. 10A and FIG. 10B are diagrams illustrating how the antenna device according to the fifth embodiment is coupled to the counterpart antenna.
  • FIG. 11 is a diagram illustrating a configuration of a contactless transmission system 301 according to the sixth embodiment.
  • 1A and 1B are circuit diagrams of the antenna device 101 and the non-contact transmission device 201 according to the first embodiment.
  • the non-contact transmission device 201 includes a power transmission system circuit 11, an NFC (near field communication) system circuit 21, and an antenna device 101.
  • the antenna device 101 includes a first coil antenna 1, a second coil antenna 22 for a second contactless transmission system, switches SW 1 and SW 2, a capacitor 23, a switching circuit 2, and a control unit 3.
  • the first coil antenna 1 is an element having an inductor component, but is not represented by an inductor symbol but is represented by a planar coil shape.
  • the NFC system circuit 21 is connected to both ends of the second coil antenna 22 for the second contactless transmission system.
  • the power transmission system circuit 11 is a circuit used in a magnetic field type non-contact power transmission system such as an electromagnetic induction power transmission system or a magnetic resonance power transmission system.
  • the electromagnetic induction transmission system is used in the LF band, particularly at a frequency in the vicinity of 100 kHz to 200 kHz.
  • the magnetic resonance power transmission system is used in the HF band, particularly in the vicinity of 6.78 MHz.
  • the magnetic field type non-contact power transmission system performs power transmission by coupling with a power transmission partner by magnetic field coupling. This power transmission system corresponds to a “first contactless transmission system circuit” of the present invention.
  • the NFC system circuit 21 is a circuit used in, for example, a short-range wireless communication system.
  • the short-range wireless communication system is, for example, a system using NFC (Near Field Communication).
  • NFC Near Field Communication
  • short-range wireless communication systems are used in the HF band, particularly in the vicinity of 13.56 MHz.
  • the short-range wireless communication system communicates with a communication partner by magnetic field coupling.
  • This NFC system corresponds to a “second contactless transmission system circuit” of the present invention.
  • the switches SW1 and SW2 are SPDT type switches, and are examples of the “switching circuit” according to the present invention.
  • 1A shows the first state
  • FIG. 1B shows the second state.
  • the control unit 3 controls the states of the switches SW1 and SW2. That is, the control unit 3 determines either the first state shown in FIG. 1 (A) or the second state shown in FIG. 1 (B).
  • the first coil antenna 1 is electrically connected to the power transmission system circuit 11 to perform transmission in the power transmission system.
  • the first coil antenna 1 is electrically connected to the NFC system circuit 21 to perform transmission in the NFC system.
  • the switches SW1 and SW2 are composed of, for example, MOS-FETs.
  • electrically connected refers to a state of being connected as a current path, and includes a state of being connected via an electronic component such as a capacitor.
  • the first coil antenna 1 is used as a coil antenna for the power transmission system, and the power received via the coil antenna for the power transmission system is two. Charge the next battery.
  • the power transmission system circuit 11 is a circuit on the power transmission side, power is transmitted to the counterpart device via a coil antenna for the power transmission system.
  • the power transmission system circuit 11 uses the first coil antenna 1 as an antenna for the power transmission system.
  • the first coil antenna 1 is electromagnetically coupled (magnetic field coupling and electric field coupling) with the counterpart antenna of the power transmission system, and receives power by an electromagnetic induction method, a magnetic field resonance method, or the like.
  • the second coil antenna 22 is magnetically coupled to the first coil antenna 1.
  • the second coil antenna 22 functions as a coupling coil
  • the first coil antenna 1 functions as a booster antenna.
  • the size (occupied area) of the antenna device is effectively used. The size can be reduced accordingly. Further, since the operation is performed by switching between the first state and the second state, it is possible to avoid the deterioration of the antenna characteristics due to the mutual interference of each system.
  • the first coil antenna 1 and the capacitor 23 form a resonance loop.
  • the resonance frequency of the resonance loop to the communication frequency band of the NFC system, the current flowing through the resonance loop is increased, and the antenna characteristics in the NFC communication (second non-contact transmission) system are improved.
  • the NFC system circuit 21 is provided with a capacitor for impedance matching with the second coil antenna 22 at, for example, the frequency of the NFC system.
  • the control unit 3 may be a control unit that controls the power transmission system circuit 11 or the NFC system circuit 21. Moreover, the one part may be sufficient.
  • the control unit 3 may be configured such that the state of the switching circuit 2 is set by a user operation on a separately provided interface or an external signal input.
  • means for detecting whether the counterpart antenna close to the first coil antenna 1 is an antenna of a power transmission system or an antenna of an NFC system and the state of the switching circuit is set according to the detection result. It may be configured as follows. Further, the state of the switching circuit may be switched in a time-sharing manner, and power transmission in the power transmission system or communication in the NFC system may be performed in a state where transmission is possible.
  • FIG. 2 is a plan view showing the shapes and positional relationships of the first coil antenna 1 and the second coil antenna 22.
  • the first coil antenna 1 is a conductor pattern formed on a base material 10, for example, a copper foil laminated on a liquid crystal polymer sheet or a polyimide sheet is formed by photolithography.
  • the second coil antenna 22 is mounted on the circuit board.
  • the first coil antenna 1 is a planar coil composed of a rectangular spiral conductor pattern.
  • the second coil antenna 22 is a chip component having a helical conductor pattern.
  • the winding axis of the second coil antenna 22 is orthogonal to the winding axis of the first coil antenna 1, and a part of the first coil antenna 1 is part of the second coil antenna 22 in plan view of the first coil antenna 1. Overlap.
  • the coupling coefficient between the first coil antenna 1 and the coil antenna 22 is increased. Therefore, when viewed from a circuit connected to the coil antenna 22, the magnetic field radiation efficiency of the first coil antenna 1 as a booster antenna is increased.
  • the second coil antenna 22 includes a multilayer substrate 20 on which a plurality of sheets 20a to 20i are laminated, and a coil conductor formed on the multilayer substrate 20. In FIG. 3, the upper and lower nonmagnetic sheets 20a and 20i are not shown.
  • a plurality of first linear portions 22L of coil conductors are formed on the lower surface of the magnetic sheet 20b.
  • a plurality of second linear portions 22U of the coil conductor are formed on the upper surface of the magnetic sheet 20h.
  • a plurality of via conductors (interlayer connection conductors) 22V of coil conductors are formed on the magnetic sheets 20b to 20h.
  • the linear portions 22L and 22U and the via conductors 22V constitute a second coil antenna 22 having a helical coil conductor along a horizontally installed flat rectangular tube.
  • FIG. 5 (A) and 5 (B) are diagrams showing a state of coupling between the antenna device according to the present embodiment and the counterpart antenna, and the antenna device 101 is provided in the housing 40.
  • FIG. The second coil antenna 22 is mounted on the circuit board 30.
  • the base material 10 on which the first coil antenna 1 is formed is attached to the inner surface of the housing 40.
  • FIG. 5A is a diagram showing a state of coupling between the antenna apparatus 101 and the counterpart antenna of the power transmission system in the power transmission state (first state).
  • FIG. 5B is a diagram showing a state of coupling between the antenna apparatus 101 and the NFC communication partner antenna in the NFC communication state (second state).
  • the first coil antenna 1 is a planar coil whose winding axis is perpendicular to the plane, and the winding axis of the second coil antenna 22 is orthogonal to the winding axis of the first coil antenna 1. A part of the first coil antenna 1 overlaps the second coil antenna 22 in a plan view of the one-coil antenna 1.
  • An electronic device including the antenna device 101 shown in FIGS. 5A and 5B is a portable electronic device such as a so-called smartphone, notebook PC, or tablet terminal.
  • a looped coil antenna is provided in the counterpart antenna 211 of the power transmission system shown in FIG.
  • the counterpart antenna 211 and the first coil antenna 1 of the power transmission system are magnetically coupled as indicated by a magnetic flux ⁇ 1.
  • the second coil antenna 22 does not inhibit the coupling between the counterpart antenna 211 and the first coil antenna 1 of the power transmission system.
  • a looped coil antenna is provided in the counterpart antenna 221 of the NFC communication system shown in FIG.
  • the counterpart antenna 221 and the first coil antenna 1 of the NFC communication system are magnetically coupled as indicated by a magnetic flux ⁇ 2.
  • the first coil antenna 1 and the second coil antenna 22 are magnetically coupled as indicated by a magnetic flux ⁇ 3. That is, the NFC system circuit 21 connected to the second coil antenna 22 and the NFC communication counterpart circuit connected to the counterpart antenna 221 of the NFC communication system include the second coil antenna 22 and the first coil antenna 1. Communicated through. In that case, the 1st coil antenna 1 acts as a booster antenna.
  • Enumerating the characteristic effects of the antenna device 101 of the present embodiment is as follows.
  • the size (occupied area) of the antenna device is effectively used. The size can be reduced accordingly.
  • the operation is switched between the first state and the second state, it is possible to avoid deterioration of antenna characteristics due to mutual interference among the systems.
  • the first coil antenna 1 is a planar coil whose winding axis is perpendicular to the plane, and the winding axis of the second coil antenna 22 is orthogonal to the winding axis of the first coil antenna 1.
  • the coupling coefficient between the first coil antenna 1 and the second coil antenna 22 is substantially equal. Is expensive. Therefore, when viewed from the circuit connected to the second coil antenna 22, the magnetic field radiation efficiency of the first coil antenna 1 as a booster antenna is high.
  • both ends of the first coil antenna 1 are connected via the capacitor 23, and the first coil antenna 1 and the capacitor 23 constitute a resonance loop of the communication frequency of the NFC system.
  • the current flowing through the resonance loop can be increased, and the antenna characteristics are improved in the NFC communication (second non-contact transmission) system.
  • 6A and 6B are circuit diagrams of the antenna device 102 and the non-contact transmission device 202 according to the second embodiment.
  • the antenna device 102 includes a first coil antenna 1, a second coil antenna 22, a switching circuit 2, a capacitor 23, and a control unit 3.
  • the switching circuit 2 includes switches SW11, SW12, and SW21.
  • the control unit 3 controls the states of the switches SW11, SW12, and SW21.
  • the first coil antenna 1, the second coil antenna 22, the capacitor 23, and other basic configurations are the same as those of the antenna device 101 and the non-contact transmission device 201 shown in FIGS. 1 (A) and 1 (B).
  • switches SW1 and SW2 shown in FIGS. 1A and 1B are SPDT type switches
  • the switches SW11, SW12, and SW21 of the present embodiment are SPST type switches, respectively.
  • the switch circuit configuration of the switching circuit 2 can take several configurations. An appropriate number of switches may be arranged according to the circuit configuration of the switch.
  • the capacitor 23 and the first coil antenna are used.
  • the switches SW11, SW12, and SW21 may be omitted because the influence of the power transmission system by the resonance loop constituted by 1 is small.
  • 7A and 7B are circuit diagrams of the antenna device 103 and the non-contact transmission device 203 according to the third embodiment.
  • the antenna device 103 includes a first coil antenna 1, a second coil antenna 22, and a switching circuit 2.
  • the switching circuit 2 includes inductors 13A and 13B and a capacitor 23.
  • the inductors 13 ⁇ / b> A and 13 ⁇ / b> B are connected in series between the power transmission system circuit 11 and the first coil antenna 1, and the capacitor 23 is connected between both ends of the first coil antenna 1.
  • the capacitor 23 in the present embodiment is a component of the switching circuit 2.
  • Other basic configurations are the same as those of the antenna device 101 and the non-contact transmission device 201 shown in FIGS. 1 (A) and 1 (B).
  • the center frequency of the first frequency band used in the power transmission system is 6.78 MHz
  • the first frequency band used in the NFC system second contactless transmission system
  • the center frequency of the two frequency bands is 13.56 MHz. That is, the first frequency band is lower than the second frequency band. Therefore, the impedances of the inductors 13A and 13B are larger in the second frequency band than in the first frequency band. Further, the impedance of the capacitor 23 is larger in the first frequency band than in the second frequency band.
  • FIG. 7A shows the operation of the circuit in the power transmission system (first contactless transmission system).
  • a current in the 6.78 MHz band flows through the inductors 13A and 13B and the first coil antenna 1 in the power transmission system circuit.
  • the antenna device 103 since the inductors 13A and 13B have low impedance, the antenna device 103 does not become unnecessarily high impedance when viewed from the power transmission system circuit 11, and the first coil antenna 1 is the power transmission system antenna coil. Used as In this state, since the capacitor 23 has a high impedance, the capacitor 23 connected to the first coil antenna 1 does not adversely affect the power transmission system.
  • FIG. 7B shows the circuit operation in the NFC system (second non-contact transmission system).
  • a resonance loop formed by the first coil antenna 1 and the capacitor 23 resonates at 13.56 MHz of the NFC system, and the resonance loop and the second coil antenna 22 are magnetically coupled.
  • the inductors 13A and 13B have high impedance, the power transmission system circuit 11 is substantially disconnected, and the power transmission system circuit 11 does not have an adverse effect.
  • the switches such as the switches SW1 and SW2 and the control unit 3 for controlling the switches shown in FIGS. 1A and 1B are not required, and the circuit configuration is simplified.
  • 8A and 8B are circuit diagrams of the antenna device 104 and the non-contact transmission device 204 according to the fourth embodiment.
  • the antenna device 101 differs from the antenna device 101 shown in FIG.
  • the antenna device 104 includes a first coil antenna 1, a second coil antenna 22, a switching circuit 2, and a control unit 3.
  • the switching circuit 2 includes switches SW1 and SW2.
  • the power transmission system circuit 11 uses the first coil antenna 1 as the first non-contact transmission system coil antenna.
  • the first coil antenna 1 forms a closed loop of a plurality of turns
  • the second coil antenna 22 for the second contactless transmission system is the first coil antenna. 1 and magnetic field coupling.
  • the capacitor for forming the resonance loop is not essential, and the first coil antenna 1 functions as a booster antenna for the NFC system even without the capacitor.
  • FIGS. 8A and 8B are circuit diagrams of another antenna device 104A and a non-contact transmission device 204A according to the fourth embodiment.
  • the configuration of the switching circuit 2 is different from the antenna device 104 illustrated in FIGS. 8A and 8B.
  • the switching circuit 2 does not have the switches SW1 and SW2 and is constituted by the capacitor 23.
  • the capacitor 23 when the power transmission system is in operation, the capacitor 23 has a high impedance at the operating frequency of the power transmission system, and a current flows from the power transmission system circuit 11 to the first coil antenna 1.
  • the capacitor 23 has a low impedance at the operating frequency of the NFC system. Therefore, the first coil antenna 1 is coupled to the second coil antenna 22 of the NFC system circuit 21, and a current flows through the first coil antenna 1 and the capacitor 23. Therefore, when operating in the NFC system, there is no adverse effect from the power transmission system circuit.
  • the capacitor 23 and the first coil antenna 1 may form a resonance loop or may not form a resonance loop.
  • FIGS. 10A and 10B are views showing a state of coupling between the antenna device according to the fifth embodiment and the counterpart antenna, and the antenna device 105 is provided in the housing 40.
  • the second coil antenna 22 is mounted on the circuit board 30.
  • the base material 10 on which the first coil antenna 1 is formed is attached to the inner surface of the housing 40.
  • a conductive portion 4 such as a metal frame or a battery pack is provided in the housing 40.
  • FIG. 10A is a diagram showing a state of coupling between the antenna device 105 and the counterpart antenna of the power transmission system in the power transmission state (first state).
  • FIG. 10B is a diagram showing a state of coupling between the antenna device 105 and the counterpart antenna of the NFC system in the NFC communication state (second state).
  • the conductive portion 4 is disposed on the same side as the second coil antenna 22 with respect to the first coil antenna 1, and the first coil antenna 1 is seen in plan view of the first coil antenna 1.
  • the conductive portion 4 overlaps the coil opening CA.
  • the conductive portion 4 shields the coil opening of the second coil antenna 22 with respect to the magnetic flux ⁇ 1 shown in FIG. Therefore, the conductive portion 4 acts so that the magnetic flux ⁇ 1 does not interlink with the second coil antenna 22. This effectively reduces unnecessary coupling between the second coil antenna 22 and the counterpart antenna 211 of the power transmission system.
  • the end surface EF that is a part of the plane of the conductive portion 4 is orthogonal to the winding axis of the second coil antenna 22. As a result, the shielding effect of the coil opening of the second coil antenna 22 against the magnetic flux ⁇ 1 is enhanced, and unnecessary coupling between the second coil antenna 22 and the counterpart antenna 211 of the power transmission system is further effectively reduced.
  • the conductive portion 4 does not interfere with the magnetic field coupling between the second coil antenna 22 and the first coil antenna 1, and the coupling coefficient does not decrease. .
  • FIG. 11 is a diagram illustrating a configuration of a contactless transmission system 301 according to the sixth embodiment.
  • the non-contact transmission system 301 includes a charging stand 210 of the power transmission system, a counterpart device 220 of the NFC system, and a non-contact transmission device 201.
  • the charging stand 210 of the power transmission system corresponds to the “partner device of the power transmission system” according to the present invention
  • the partner device 220 of the NFC system corresponds to the “partner device of the short-range communication system” according to the present invention. .
  • the configuration of the non-contact transmission apparatus 201 is the same as that of the non-contact transmission apparatus 201 shown in the first embodiment.
  • the power transmission system charging stand 210 includes a power transmission system circuit 212 and a counterpart antenna 211 of the power transmission system connected thereto.
  • the counterpart device 220 of the NFC system includes an NFC system circuit 222 and a counterpart antenna 221 of the NFC communication system connected thereto.
  • the first coil antenna 1 of the non-contact transmission device 201 is close to the counterpart antenna 211 of the charging base 210, the first coil antenna 1 and the counterpart antenna 211 are magnetically coupled to each other by an electromagnetic induction method or a magnetic resonance method. Electric power is transmitted. In this state, the secondary battery connected to the power transmission system circuit 11 is charged.
  • the first coil antenna 1 of the non-contact transmission apparatus 201 is close to the counterpart antenna 221 of the NFC communication system, the first coil antenna 1 and the counterpart antenna 221 of the NFC communication system are magnetically coupled to each other to perform short-range communication ( Send / receive).
  • the counterpart device is a device that supports both the power transmission system and the NFC system, and the counterpart antenna 211 of the power transmission system and the counterpart antenna 221 of the NFC communication system are substantially at the same position. Good.
  • the power transmission system or the NFC system can be selectively used by switching the switching circuit 2 under the control of the control unit 3 of the non-contact transmission apparatus 201.
  • the shape of the first coil antenna 1 showing an example in which the first coil antenna 1 is formed on the planar substrate 10 is not limited to a planar shape, and may be a curved surface shape. , A part may be curved.
  • the first coil antenna 1 is not limited to a rectangular spiral coil, and may be a circular spiral shape or an elliptical spiral shape. Furthermore, the pattern of the coil conductor is not limited to a single layer, and may be formed over multiple layers.
  • the second coil antenna 22 formed in the laminated body is not limited to a helical shape, but may be a winding type configured by winding a conducting wire around a planar coil or magnetic core. Moreover, it does not need to be formed as a chip component.
  • the capacitor 23 is not limited to being provided as an individual component, and may be a capacitance generated in a conductor pattern.
  • the non-contact transmission device of the present invention is not limited to portable electronic devices such as smartphones, notebook PCs, and tablet terminals, but also includes mobile phone terminals such as feature phones, wearable terminals such as smart watches and smart glasses, cameras, game machines, and toys. Applicable to various electronic devices.
  • the non-contact transmission apparatus provided with the power transmission system circuit and the NFC system circuit is exemplified, but the non-contact transmission apparatus applied to two short-range communication systems with different communication standards. There may be.
  • a contactless transmission apparatus including the antenna device, and a contactless transmission system can be configured similarly.
  • CA Coil opening EF ... End face SW1, SW2, SW11, SW12, SW21 ... Switch 1 ... First coil antenna 2 ... Switching circuit 3 ... Control part 4 ... Conductive part 10 ... Base material 11 ... Circuit for power transmission system (first Circuit for contactless transmission system) 13A, 13B... Inductor 20... Multilayer substrate 20a, 20i... Nonmagnetic sheet 20b to 20h ... Magnetic sheet 21... NFC system circuit (second non-contact transmission system circuit) 22 ... 2nd coil antenna 22L ... 1st wire

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'antenne (101) qui comprend : une première antenne de bobine (1); une seconde antenne de bobine (22), dont les deux extrémités sont connectées à un circuit de système NFC (21), ladite seconde antenne de bobine étant prévue pour un second système de transmission sans contact; et des circuits de commutation (SW1, SW2) qui réalisent une commutation entre un premier état, dans lequel un circuit de système de transmission de puissance (11) est connecté aux deux extrémités de la première antenne de bobine (1), et un second état dans lequel les deux extrémités de la première antenne de bobine (1) sont connectées l'une à l'autre. Dans le premier état, la transmission est effectuée à l'aide d'un premier système de transmission sans contact, et dans le second état, la seconde antenne de bobine (22) et la première antenne de bobine (1) sont couplées l'une à l'autre au moyen d'un couplage de champ magnétique, et la transmission est effectuée à l'aide du second système de transmission sans contact.
PCT/JP2018/002230 2017-01-27 2018-01-25 Dispositif d'antenne, dispositif de transmission sans contact et système de transmission sans contact WO2018139519A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201890000454.0U CN210182579U (zh) 2017-01-27 2018-01-25 天线装置、非接触传输装置以及非接触传输系统
JP2018551477A JP6443608B1 (ja) 2017-01-27 2018-01-25 アンテナ装置、非接触伝送装置および非接触伝送システム

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JP2017012615 2017-01-27
JP2017-012615 2017-01-27

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WO2018139519A1 true WO2018139519A1 (fr) 2018-08-02

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Publication number Priority date Publication date Assignee Title
JP7271256B2 (ja) 2019-03-28 2023-05-11 ラピスセミコンダクタ株式会社 受電装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011015005A (ja) * 2009-06-30 2011-01-20 Panasonic Corp アンテナ装置及びそれを備えた携帯無線機
JP2012019302A (ja) * 2010-07-07 2012-01-26 Nec Tokin Corp アンテナモジュール及び非接触電力伝送装置
WO2012033031A1 (fr) * 2010-09-07 2012-03-15 株式会社村田製作所 Appareil d'antenne et appareil de terminal de communication
JP2012129975A (ja) * 2010-11-26 2012-07-05 Kyocera Corp 携帯電子機器
WO2015099065A1 (fr) * 2013-12-27 2015-07-02 日立化成株式会社 Unité de réception d'énergie sans contact, appareil de réception d'énergie sans contact et appareil de transmission/réception d'énergie sans contact
JP3200838U (ja) * 2012-11-19 2015-11-12 アップル インコーポレイテッド 近接場通信回路及び非近接場通信回路用の共有アンテナ構造体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011015005A (ja) * 2009-06-30 2011-01-20 Panasonic Corp アンテナ装置及びそれを備えた携帯無線機
JP2012019302A (ja) * 2010-07-07 2012-01-26 Nec Tokin Corp アンテナモジュール及び非接触電力伝送装置
WO2012033031A1 (fr) * 2010-09-07 2012-03-15 株式会社村田製作所 Appareil d'antenne et appareil de terminal de communication
JP2012129975A (ja) * 2010-11-26 2012-07-05 Kyocera Corp 携帯電子機器
JP3200838U (ja) * 2012-11-19 2015-11-12 アップル インコーポレイテッド 近接場通信回路及び非近接場通信回路用の共有アンテナ構造体
WO2015099065A1 (fr) * 2013-12-27 2015-07-02 日立化成株式会社 Unité de réception d'énergie sans contact, appareil de réception d'énergie sans contact et appareil de transmission/réception d'énergie sans contact

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CN210182579U (zh) 2020-03-24
JP6443608B1 (ja) 2018-12-26

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