WO2014030662A1 - アンテナ装置及び電子機器 - Google Patents
アンテナ装置及び電子機器 Download PDFInfo
- Publication number
- WO2014030662A1 WO2014030662A1 PCT/JP2013/072259 JP2013072259W WO2014030662A1 WO 2014030662 A1 WO2014030662 A1 WO 2014030662A1 JP 2013072259 W JP2013072259 W JP 2013072259W WO 2014030662 A1 WO2014030662 A1 WO 2014030662A1
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- antenna
- conductor
- antenna coil
- external device
- coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
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- 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
- H01Q1/526—Electromagnetic shields
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- 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
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- 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
- H01Q7/04—Screened antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
Definitions
- the present invention relates to an antenna device that is incorporated in an electronic device and communicates with an external device via an electromagnetic field signal, and an electronic device in which the antenna device is incorporated.
- This application includes Japanese Patent Application No. 2012-184183 filed on August 23, 2012 in Japan, Japanese Patent Application No. 2013-021616 filed on February 6, 2013 in Japan, And claims the priority on the basis of Japanese Patent Application No. 2013-163537 filed on August 6, 2013 in Japan, and this application is incorporated herein by reference. .
- an antenna module for RFID Radio Frequency Identification
- RFID Radio Frequency Identification
- This antenna module communicates with an antenna coil mounted on a transmitter such as a reader / writer using inductive coupling. That is, in this antenna module, when the antenna coil receives the magnetic field from the reader / writer, the antenna coil can convert it into electric power and drive an IC that functions as a communication processing unit.
- the antenna module needs to receive a magnetic flux of a certain value or more from the reader / writer with the antenna coil in order to reliably communicate. Therefore, in the antenna module according to the conventional example, a loop coil is provided in the casing of the mobile phone, and the coil receives the magnetic flux from the reader / writer.
- Patent Document 1 proposes a method of arranging a flexible cable or a flat cable around a built-in battery as a method for improving the characteristics of a loop antenna built in a portable terminal device.
- the loop coil has a magnetic flux from the reader / writer passing through the loop coil on one side of the loop coil in which the coil lead wire circulates in one direction and on the other side of the loop coil in which the coil lead wire circulates in the other direction.
- the present invention has been proposed in view of such circumstances, and provides an antenna device capable of realizing good communication characteristics when incorporated in an electronic device, and an electronic device incorporating this antenna device. For the purpose.
- an antenna device is incorporated in an electronic device and communicates with an external device via an electromagnetic field signal.
- the antenna device is an antenna device that is incorporated in an electronic device and communicates with an external device via an electromagnetic field signal.
- This antenna device is provided on the inner surface of one member constituting the casing of the electronic device, and is provided on one member so that the antenna coil is inductively coupled to the external device and the antenna coil partially overlaps.
- a conductor is provided on the inner surface of one member constituting the casing of the electronic device, and is provided on one member so that the antenna coil is inductively coupled to the external device and the antenna coil partially overlaps.
- One member of the electronic device may be provided with a metal layer on the inner surface, and the metal layer provided on the inner surface overlaps with part of the conductor.
- the electronic device is an electronic device in which an antenna device that communicates with an external device via an electromagnetic field signal is incorporated.
- the antenna device includes a first conductor facing the external device; An antenna coil that is inductively coupled to an external device, and a sheet-like shape that overlaps or contacts the first conductor and at least a portion that overlaps the surface of the antenna coil opposite to the surface facing the external device.
- the second conductor and a communication processing unit that performs communication with the external device.
- the electronic device of the present invention is an electronic device in which an antenna device that communicates with an external device via an electromagnetic field signal is incorporated.
- the antenna device is provided on the inner surface of one member constituting the casing of the electronic device, and is provided on the one member so that the antenna coil inductively coupled to the external device and the antenna coil partially overlap.
- a conductor is provided on the inner surface of one member constituting the casing of the electronic device, and is provided on the one member so that the antenna coil inductively coupled to the external device and the antenna coil partially overlap.
- One member of the electronic device may be provided with a metal layer on the inner surface, and the metal layer provided on the inner surface overlaps with part of the conductor.
- An antenna device is an antenna device that is incorporated in an electronic device and communicates with an external device via an electromagnetic field signal.
- the antenna device is provided inside the housing of the electronic device and faces the external device.
- the antenna coil includes a sheet-like second conductor that is disposed close to or in contact with the surface of the antenna coil that is opposite to the surface facing the external device, and at least a part of which overlaps.
- the antenna device partially overlaps the antenna coil with the antenna coil, so that the magnetic field in the overlapping region is rebounded to suppress inductive coupling in the overlapping region and is generated in the non-overlapping region. Current can be transmitted efficiently.
- the antenna device can partly overlap the second conductor with the antenna coil, thereby concentrating the magnetic flux in the non-superimposed region and promoting efficient power generation in the region.
- the antenna device has a region of the antenna coil in which the second conductor is not superimposed without leaking the magnetic flux from the first conductor by overlapping the second conductor with the first conductor. And efficient inductive coupling can be performed.
- FIG. 1 is a perspective view showing a schematic configuration of a wireless communication system in which an antenna device to which the present invention is applied is incorporated.
- FIG. 2 is a perspective view showing the antenna substrate and the metal plate.
- FIG. 3 is a perspective view showing an example of the inside of an electronic device to which the present invention is applied, and shows a case where a metal cover affixed inside the housing is used as the first conductor.
- FIG. 4 is a perspective view showing an example of the inside of an electronic apparatus to which the present invention is applied, and shows a case where a metal casing of a battery pack is used as the first conductor.
- FIG. 1 is a perspective view showing a schematic configuration of a wireless communication system in which an antenna device to which the present invention is applied is incorporated.
- FIG. 2 is a perspective view showing the antenna substrate and the metal plate.
- FIG. 3 is a perspective view showing an example of the inside of an electronic device to which the present invention is applied, and shows a case where a metal cover
- FIG. 5 is a perspective view showing an example of the inside of an electronic apparatus to which the present invention is applied, and shows a case where a metal plate provided on the back surface of the liquid crystal module is used as the first conductor.
- 6A and 6B are diagrams illustrating an antenna device incorporated in an electronic device, FIG. 6A is a perspective view, and FIG. 6B is a side view.
- FIG. 7 is a perspective view showing a state in which the metal foil overlaps one side of the antenna substrate over the entire width in the longitudinal direction.
- FIG. 8 is a perspective view showing an antenna substrate having a larger number of turns on the other side where the metal foil is superimposed than on one side where the metal foil is superimposed.
- FIG. 9 is a perspective view showing an antenna device in which a metal plate and an antenna substrate are superimposed by a plurality of metal foils.
- FIG. 10 is a perspective view showing an antenna device in which a metal plate and an antenna substrate are superimposed by a metal foil having an opening.
- 11A and 11B are views showing an antenna substrate into which a magnetic sheet is inserted, FIG. 11A is a perspective view, and FIG. 11B is a cross-sectional view.
- 12A and 12B are views showing an antenna substrate into which a magnetic sheet is inserted, FIG. 12A is a perspective view, and FIG. 12B is a cross-sectional view.
- FIG. 12A is a perspective view
- FIG. 12B is a cross-sectional view.
- FIGS. 15A to 15C show a configuration in which a metal foil is arranged so as to cover a part of an antenna coil when an antenna substrate is arranged on one side of a case made up of two case members.
- FIG. 15A is an exploded perspective view
- FIG. 15B is a cross-sectional view
- FIG. 15C is a cross-sectional view showing a configuration example of a metal foil.
- FIG. 16A and 16B show a metal foil so as to cover a part of the antenna coil and the metal cover when the antenna substrate and the metal cover are arranged on one of the housings made of the housing member divided into two. It is a figure which shows the structure which arranges. 16A is an exploded perspective view, and FIG. 16B is a cross-sectional view.
- FIG. 17A and FIG. 17B are diagrams illustrating a configuration example in a case where the antenna substrate is arranged on one side of a housing formed of a housing member divided into two.
- FIG. 17A shows a type in which the magnetic sheet is inserted into the antenna substrate
- FIG. 17B shows a type in which the magnetic sheet is arranged only on a part of the antenna substrate.
- FIG. 18A to 18C are cross-sectional views showing modifications of the shape of the metal foil.
- FIG. 18A shows a case where the metal foil is bent along the side surface of the metal plate to the side opposite to the reader / writer side.
- 18B when the metal foil is bent in FIG. 18A and the antenna substrate is arranged farther from the reader / writer than in the case of FIG. 18A, FIG. 18C is bent to the reader / writer side along the side surface of the metal plate.
- the case where it was made to show is shown.
- 19A and 19B are cross-sectional views showing other modified examples of the shape of the metal foil, and FIG. 19A is superimposed on the surface facing the reader / writer after the metal foil is bent along the side surface of the metal plate.
- FIG. 20 is a perspective view showing an antenna device according to a comparative example.
- FIG. 21 is a graph showing changes in the coupling coefficient according to the comparative example.
- FIG. 22 is a perspective view illustrating the antenna device according to the embodiment.
- FIG. 23 is a graph illustrating changes in the coupling coefficient according to the example.
- FIG. 24 is a perspective view showing a configuration example when the antenna coil is wound around a magnetic sheet.
- An antenna device to which the present invention is applied is a device that is incorporated in an electronic device and communicates with an external device via an electromagnetic field signal.
- a radio communication system for RFID Radio Frequency Identification
- FIG. 100 a radio communication system for RFID (Radio Frequency Identification) as shown in FIG. 100 is used.
- the wireless communication system 100 includes an antenna device 1 and a reader / writer 120 that accesses the antenna device 1.
- the antenna device 1 and the reader / writer 120 are arranged to face each other on the xy plane of the three-dimensional orthogonal coordinate system xyz.
- the reader / writer 120 functions as a transmitter that transmits a magnetic field in the z-axis direction to the antenna devices 1 that face each other in the xy plane, and specifically, an antenna 121 that transmits a magnetic field toward the antenna device 1 And a control board 122 that communicates with the antenna device 1 that is inductively coupled via the antenna 121.
- the reader / writer 120 is provided with a control board 122 electrically connected to the antenna 121.
- a control circuit made of electronic components such as one or a plurality of integrated circuit chips is mounted on the control board 122.
- the control circuit executes various processes based on the data received from the antenna device 1. For example, when transmitting data to the antenna device 1, the control circuit encodes the data, modulates a carrier wave of a predetermined frequency (for example, 13.56 MHz) based on the encoded data, and modulates the modulation.
- the signal is amplified, and the antenna 121 is driven by the amplified modulation signal.
- the control circuit When reading data from the antenna device 1, the control circuit amplifies the modulation signal of the data received by the antenna 121, demodulates the modulation signal of the amplified data, and decodes the demodulated data.
- a coding system and a modulation system used in a general reader / writer are used. For example, a Manchester coding system or an ASK (Amplitude Shift Keying) modulation system is used.
- the antenna device and the like in the non-contact communication system will be described, but it is needless to say that the present invention can be similarly applied to a non-contact charging system such as Qi.
- the antenna device 1 is incorporated in a housing of an electronic device such as a mobile phone that is arranged to face the reader / writer 120 in the xy plane during communication.
- the antenna device 1 is provided in the housing of the electronic device and the antenna module 2 that communicates with the reader / writer 120 that is incorporated and inductively coupled in the housing of the electronic device, and faces the reader / writer 120.
- a metal plate 3 serving as a first conductor and a metal plate 3 provided in the housing of the electronic device, overlapped or in contact with the metal plate 3, and on the opposite side of the surface facing the reader / writer 120 of the antenna coil 12 of the antenna module 2.
- a metal foil 4 serving as a sheet-like second conductor at least partially overlapping.
- the antenna module 2 is driven by the current that flows through the antenna substrate 11 on which the antenna coil 12 that can communicate with the reader / writer 120 that is inductively coupled, and communicates with the reader / writer 120. And a communication processing unit 13 for performing.
- an antenna coil 12 formed by patterning a flexible conductive wire such as a flexible flat cable, and a terminal for electrically connecting the antenna coil 12 and the communication processing unit 13 Part 14 is mounted.
- the antenna substrate 11 has a substantially rectangular shape as shown in FIG. 2, and one conductor wire of the antenna coil 12 is circulated along the outer shape.
- the antenna substrate 11 is arranged such that the main surface around which the antenna coil 12 circulates faces the reader / writer 120 in the xy plane during communication.
- the antenna substrate 11 has an antenna coil 12 on one side 11a with the direction of current flowing in the same direction along the longitudinal direction of the conducting wire of the antenna coil 12 at the center 12a of the antenna coil 12, and the antenna coil The other side 11b which makes 12 conducting wires into the direction of the circumference in which the direction of the electric current along a longitudinal direction flows in the reverse direction.
- the antenna substrate 11 is arranged with one side edge along the longitudinal direction facing the metal plate 3, that is, the one side 11a or the other side 11b facing the metal plate 3 side.
- the antenna coil 12 does not necessarily have to be formed on the antenna substrate 11, and a loop antenna may be formed alone.
- the antenna coil 12 When the antenna coil 12 receives a magnetic field transmitted from the reader / writer 120, the antenna coil 12 is magnetically coupled to the reader / writer 120 by inductive coupling, receives the modulated electromagnetic wave, and transmits the received signal to the communication processing unit via the terminal unit. 13 is supplied.
- the communication processing unit 13 is driven by a current flowing through the antenna coil 12 and communicates with the reader / writer 120. Specifically, the communication processing unit 13 demodulates the received modulation signal, decodes the demodulated data, and writes the decoded data in the internal memory of the communication processing unit 13.
- the communication processing unit 13 reads the data to be transmitted to the reader / writer 120 from the internal memory, encodes the read data, modulates the carrier wave based on the encoded data, and is magnetically coupled by inductive coupling.
- the radio wave modulated via the coil 12 is transmitted to the reader / writer 120.
- the communication processing unit 13 may be driven not by power flowing through the antenna coil 12 but by power supplied from a power supply unit such as a battery pack or an external power source incorporated in the electronic device.
- a power supply unit such as a battery pack or an external power source incorporated in the electronic device.
- the metal plate 3 is provided in a housing of an electronic device such as a mobile phone, a smartphone, or a tablet PC, and constitutes a first conductor that faces the reader / writer 120 during communication of the antenna module 2.
- This first conductor is, for example, a metal cover 132 affixed to the inner surface of the case 131 of the smartphone 130 shown in FIG. 3, a metal case 135 of the battery pack 134 housed in the smartphone 133 shown in FIG. Or the metal plate 137 etc. which were provided in the back surface of the liquid crystal module of tablet PC136 shown in FIG. 5 are equivalent.
- the smartphone 133 as an example mainly as an electronic device, in the metal casing 135 of the battery pack 134 housed in the smartphone 133, the main surface facing the reader / writer 120 during communication is used as the first conductor. It demonstrates as the metal plate 3 to comprise.
- the antenna board 11 is formed between the end 3a of the metal plate 3 facing the reader / writer 120 of the metal casing 135 of the battery pack 134 and the inner peripheral wall 141a of the outer casing 141 as shown in FIG. 6B. Is arranged.
- the metal plate 3 constituting the metal casing of the battery pack 134 disposed in the smartphone 133 flows electricity relatively well. An electric current is generated and the magnetic field is rebounded. Examining the magnetic field distribution when an AC magnetic field is applied from the outside, the magnetic field at the end 3a of the metal plate 3 of the battery pack 134 facing the reader / writer 120 is strong.
- the antenna substrate 11 of the antenna module 2 is parallel to the z-axis as shown in FIG.
- the center 12a of the antenna coil 12 passes through the space 142 between the end 3a of the metal plate 3 and the inner peripheral wall 141a of the outer casing 141, and one side edge in the longitudinal direction faces the end 3a of the metal plate 3.
- the one side 11 a is arranged toward the end 3 a side of the metal plate 3.
- the antenna substrate 11 may be provided in a separated position without contacting the end 3a of the metal plate 3.
- the antenna device 1 is described later over the metal plate 3 and the antenna substrate 11. Good communication characteristics can be obtained by superimposing the metal foil 4 to be overlapped.
- the antenna substrate 11 may be in contact with the metal plate 3. Further, the antenna substrate 11 may overlap the metal plate 3. At this time, the antenna substrate 11 is provided so that one side 11a on which a metal foil 4 to be described later overlaps and the metal plate 3 overlap, and the other side 11b is not overlapped with the metal plate 3. If the other side 11b and the metal plate 3 overlap, the inductive coupling between the other side 11b and the magnetic flux of the reader / writer 120 may be hindered.
- Metal foil 4 Between the antenna substrate 11 and the metal plate 3, the metal plate 3 (first conductor) is overlapped or brought into contact with the antenna substrate 11, and at least one surface opposite to the surface facing the reader / writer 120 of the antenna substrate 11. A metal foil 4 serving as a sheet-like second conductor on which the portions overlap is provided. The metal foil 4 is superposed on a part of the antenna substrate 11 to suppress inductive coupling in the superposed region by repelling the magnetic field in a part of the superposed antenna substrate 11, and to the non-superimposed region. Promote concentration of magnetic flux and improve communication performance.
- the antenna substrate 11 has a magnetic flux from the reader / writer that passes through the antenna coil 12 that circulates around the main surface of the substrate, the one side 11a in which the coil conductor circulates in one direction, and the other in which the coil conductor circulates in the other direction.
- the side 11b On the side 11b, a current in the opposite direction is produced, so that it cannot be efficiently coupled.
- the antenna device 1 suppresses inductive coupling in the overlapping region by repelling the magnetic field in the overlapping region by partially overlapping the metal foil 4 with the surface opposite to the surface facing the reader / writer 120 of the antenna substrate 11.
- the current generated in the non-superimposed region can be transmitted efficiently.
- the antenna device 1 partially superimposes the metal foil 4 on the surface opposite to the surface facing the reader / writer 120 of the antenna substrate 11, thereby concentrating the magnetic flux on the non-superimposed region, and improving the efficiency in the region. Can promote good power generation.
- the antenna device 1 is guided to the region of the antenna substrate 11 where the metal foil 4 is not superimposed without leaking the magnetic flux from the metal plate 3 when the metal foil 4 overlaps or contacts the metal plate 3. And efficient inductive coupling can be performed. Moreover, the antenna device 1 can prevent generation of current due to inductive coupling in a part where the metal foil 4 overlaps due to leakage magnetic flux from the metal plate 3 by overlapping the metal foil 4 with the metal plate 3.
- the metal foil 4 is preferably a good conductor such as a copper foil, but is not necessarily a good conductor.
- the thickness of the metal foil 4 is appropriately determined according to the communication frequency between the antenna device 1 and the reader / writer 120. For example, a metal foil having a thickness of 20 to 30 ⁇ m can be used at a communication frequency of 13.56 MHz.
- the metal foil 4 is not necessarily in contact with the metal plate 3 and the antenna substrate 11 as long as they overlap. However, the closer the metal foil 4 is to the metal plate 3 or the antenna substrate 11, the more advantageous for the coupling coefficient.
- the metal foil 4 is preferably overlapped from the end of one side 11 a of the antenna substrate 11 to the center 12 a of the antenna coil 12. As a result, the metal foil 4 suppresses the coupling on the one side 11a of the antenna substrate 11 so that the amount of current in the direction opposite to the current generated on the other side 11b is relatively low, and the one side of the antenna substrate 11 It is possible to induce magnetic flux from 11a to the other side 11b, promote coupling on the other side 11b, and improve communication characteristics.
- the metal foil 4 preferably has a width equal to or greater than the longitudinal direction of the one side 11 a of the antenna substrate 11, and the one side 11 a of the antenna substrate 11 is preferably entirely overlapped in the longitudinal direction. . Also by this, the metal foil 4 suppresses inductive coupling on the one side 11 a of the antenna substrate 11, relatively reduces the amount of current in the direction opposite to the current generated on the other side 11 b, and reduces one side of the antenna substrate 11. It is possible to induce magnetic flux from the side 11a to the other side 11b, promote coupling on the other side 11b, and improve communication characteristics.
- the antenna substrate 11 has an antenna coil 12 on the other side 11b on which the metal foil 4 is not superimposed, rather than the number (for example, three) of the antenna coils 12 on the one side 11a on which the metal foil 4 is superimposed.
- the antenna device 1 may overlap a plurality of metal foils 4 between the metal plate 3 and the antenna substrate 11. This prevents other members such as the lens barrel even when the metal foil 4 cannot be provided, for example, when the lens barrel of the camera module is disposed between the metal plate 3 and the antenna substrate 11. Communication characteristics can be improved by providing the metal foil 4 at the position.
- the antenna device 1 may use a metal foil 4 in which an opening 21 and a notch (not shown) corresponding to other members such as a lens barrel are formed. .
- the antenna module 2 may be configured such that the magnetic sheet 20 is inserted into the antenna substrate 11.
- the antenna substrate 11 has an opening formed in the center 12a of the antenna coil 12 in the longitudinal direction, and the magnetic sheet 20 is inserted into the opening.
- the magnetic sheet 20 is located closer to the reader / writer 120 than the antenna coil 12 on one side 11a, and the antenna coil 12 is located more than the magnetic sheet 20 on the other side 11b.
- the magnetic sheet 20 is inserted into an opening formed at the center 12a of the antenna coil 12 so as to be positioned on the reader / writer 120 side.
- the antenna coil 12 is positioned closer to the reader / writer 120 than the magnetic sheet 20 on one side 11a, and the magnetic sheet 20 is positioned on the antenna coil 12 on the other side 11b, as shown in FIG. 12B.
- the magnetic sheet 20 is inserted into an opening formed at the center 12a of the antenna coil 12 so as to be positioned closer to the reader / writer 120 side.
- the metal foil 4 covers one side 11a of the antenna substrate 11 (from one end to the center), and the reader / writer further extends from the center 12a of the antenna coil 12 to the other side 11b. If it is bent away from 120, the concentrated magnetic field of the end 4a of the metal foil 4 can be more efficiently guided to the magnetic sheet 20 on the other side 11b. Since a large electromotive force is generated in the antenna coil 12 by the magnetic field guided to the other side 11b, the communication characteristics can be further improved.
- the length of one side 11a and the other side 11b may be changed by shifting the position of the center 12a of the antenna coil 12 into which the magnetic sheet 20 is inserted. Furthermore, as shown in FIG. 14B, it may be bent further away from the reader / writer 120 at the bent position 12b on the other side 11b, or may be formed in an arc (curved surface) shape. As shown in FIG. 14C, the magnetic sheet 20 may be arranged only on the other side 11b of the antenna substrate 11, and as shown in FIG. 14D, the magnetic sheet 20 is arranged only on one side of the antenna substrate 11. It may be.
- the housing 131 of the smartphone 130 is equipped with one housing member 131a on which the antenna substrate 11 is mounted on the inner surface 130a, a control circuit of a main body including a liquid crystal panel 131c, a CPU, a battery, and the like. And the other casing member 131b.
- the casing 131 is configured by coupling one casing member 131a to a casing member 131b including a main body control circuit and the like so as to cover one casing member 131a.
- the casing members 131a and 131b are detachably coupled to each other by a known method such as screwing or a combination of an engaging claw and an engaging hole.
- other functional modules such as a camera module may be mounted in advance on the housing member 131a as a single unit or in combination.
- the casing member 131a on which the functional module such as the antenna substrate 11 is mounted may be detached from the casing member 131b by the user of the smartphone 130, and a casing member on which another functional module is mounted may be attached. .
- An antenna substrate 11 is mounted in advance on a casing member 131a used as a lid, and the antenna substrate 11 has a plane including the antenna coil 12 facing the reader / writer 120 via the casing member 131a. Be placed.
- the antenna substrate 11 is disposed near the outer peripheral wall of the housing member 131a.
- the metal foil 4 is disposed so as to cover a part of the antenna coil 12.
- the metal foil 4 is preferably disposed so as to cover the inner wall portion from the center 12a of the antenna coil 12 toward the side toward the inside of the housing member 131a.
- the metal foil 4 may cover most of the inner wall portion toward the inside of the housing member 131a.
- the metal foil 4 includes an adhesive layer 4b formed by applying an adhesive to one surface of a high conductivity metal 4c such as Cu, and a resin formed on the other surface. It is also possible to have an insulating layer 4d made of or the like.
- the adhesive layer 4b the metal foil 4 is stuck so as to be in contact with the antenna substrate 11 and the inner walls of the housing member 131a.
- the adhesive used for the adhesive layer 4b is preferably an insulating adhesive, and the metal foil 4 is insulated from the metal wiring such as the conductor of the antenna coil 12 by using the insulating adhesive.
- the metal foil 4 is insulated also from metal parts, such as a control circuit mounted in the housing member 131b, by having the insulating layer 4d.
- the casing member 131a is a composite that combines a metal material such as magnesium alloy and a resin material in order to make up for the purpose of design that presents an aesthetic appearance in the electronic device itself and the lack of strength due to the thinning of the casing.
- the number of cases formed by materials is increasing. That is, the housing member 131a includes a metal cover portion 132a made of a metal material and a resin portion 132b made of a resin material.
- the metal foil 4 is arrange
- FIG. 16B similarly to the case of FIG.
- the metal foil 4 is preferably arranged from the center 12a of the antenna coil 12 toward the inside of the metal cover 132a.
- the entire base material of the housing member 131a is formed of resin or the like, and the inner surface or the outer surface is coated with metal to form the metal cover portion 132a. Also good.
- the metal foil 4 is disposed so as to cover a part of the antenna coil 12 and a part of the metal cover 132a.
- the antenna module 2 is configured such that the magnetic sheet 20 is disposed on the side opposite to the metal foil 4 with respect to the antenna coil 12 on the side where the metal foil 4 is attached.
- a type disposed on the same side as the metal foil 4 may be used.
- a magnetic sheet disposed on the same side as the metal foil 4 with respect to the antenna coil 12 on the side away from the end of the metal foil 4 may be used.
- the metal foil 4 is suitable for reduction in thickness, weight, and cost. However, it is not always necessary to use a thin foil metal. If the shape permits, a thicker metal plate or the like may be used. Of course, it may be used. For example, in the case of non-contact communication using a carrier frequency of 13.56 MHz, the thickness of the metal portion of the metal foil 4 may be about 1 ⁇ m or more. By using the thicker metal foil 4 (or metal plate), it is possible to perform communication at a lower frequency and power transmission of the non-contact charging system.
- the position of the antenna substrate 11 and the position of the metal foil 4 can be optimized.
- the performance of the antenna can be optimized regardless of the internal structure of the electronic device.
- the reception sensitivity of the antenna can be optimally adjusted by adding the metal foil 4 in the vicinity of and around the antenna later. Is also possible.
- the other side of the antenna substrate 11 on which the metal foil 4 is not superimposed faces the reader / writer 120 as shown in FIGS. Needless to say, it may be bent in the opposite direction (the positive direction of z).
- the main surface of the metal foil 4 is disposed so as to be superimposed or contacted so as to be parallel to the surface of the metal plate 3 facing the reader / writer 120.
- the metal plate 3 is not limited to a relatively thin thickness such as a plate shape or a foil shape, and the metal portion 3 may have a considerable thickness, such as a metal can of a battery pack.
- a side surface portion of the metal plate 3 such as a battery pack may be used.
- the surface from the bent portion 4b to the end portion 4c is bent by the bent portion 4b.
- the metal plate 3 may be disposed close to the side surface 3b on the end 3a side.
- FIG. 18A shows a state in which the metal foil 4 is bent substantially at a right angle in the direction in which the end 4c moves away from the reader / writer 120 (plus direction in the Z direction).
- the bent portion 4b may be closer to the reader / writer 120 side than the surface 3c of the metal plate 3 facing the reader / writer 120.
- the magnetic sheet 20 is located closer to the reader / writer 120 than the antenna coil 12 on one side 11a of the antenna coil 12, and the antenna coil 12 is located closer to the reader / writer 120 than the magnetic sheet 20 on the other side 11b. This is the same as in the above-described embodiment.
- the bent portion 4b of the metal foil 4 may be located farther from the reader / writer 120 than the surface 3c of the metal plate 3 facing the reader / writer 120.
- the bent portion 4b may be flush with the surface 3c of the metal plate 3 facing the reader / writer 120.
- the end 4c of the metal foil 4 may be bent at a substantially right angle toward the reader / writer 120 side.
- the metal foil 4 is not limited to be placed close to the side surface of the metal plate 3, and the reader / writer of the metal plate 3 can be formed from the side surface 3 b of the end 3 a of the metal plate 3.
- the metal foil 4 may be extended to the surface 3c opposite to the surface 3c, that is, the metal foil 4 bends the end portion 4c in the direction of the reader / writer 120 at the bent portion 4b, and further the bent portion 4d.
- the reader / writer 120 may be bent so as to overlap the surface 3c.
- the direction in which the metal foil 4 is bent at the bent portion 4b is bent to the side of the surface 3d opposite to the surface 3c facing the reader / writer 120 so as to be superimposed on the surface 3d. May be.
- the magnetic field is concentrated in the vicinity of the center 12a of the antenna due to the shielding effect of the magnetic flux by arranging the main surface of the metal foil 4 so as to be along the surface including the side surface of the metal plate 3. Can do.
- the metal foil 4 is bent and disposed close to the main surface so as to be parallel to the side surface of the metal plate 3, for example, when the metal plate 3 is a metal can portion of the battery pack 134, the battery back 134
- the metal foil 4 does not get in the way when removing.
- the metal foil 4 may be made to contact the surface containing the side surface of a metal plate not only in the case of adjoining along the at least side surface of the metal plate 3, but.
- the bending angle of the metal foil 4 may be 90 ° as shown in the figure, but may be other angles, and may be bent at an arbitrary angle and shape according to the shape of the end of the metal plate 3. You may make it arrange
- the magnetic sheet 20 is not limited to being arranged so as to overlap both the one side 11a and the other side 11b of the antenna coil 12, but is arranged only on the one side 11a or only on the other side 11b. Also good.
- the concrete evaluation conditions were as follows. That is, the antenna 121 of the reader / writer 120 is a two-turn coil having an outer shape defined in the xy-axis direction of 66 mm ⁇ 100 mm. Further, the metal plate 3 was made of stainless steel having dimensions defined in the xyz axis direction of 100 mm ⁇ 50 mm ⁇ 0.3 mm.
- the antenna coil 12 of the antenna substrate 11 has a structure in which an outer shape defined in the xy axis direction is 40 mm ⁇ 10 mm, and is a four-turn coil. Furthermore, the distance from the surface of the metal plate 3 to the surface of the antenna coil 12 defined in the z-axis direction was 1 mm.
- a is a distance defined in the y-axis direction from the central portion 3 b of the metal plate 3 to the end portion 11 c on the other side 11 b of the antenna substrate 11.
- the width of the metal plate 3 is 50 mm, when the value of a is 25 mm, the end 3a of the metal plate 3 and the end 11c of the other side 11b of the antenna substrate 11 coincide. Further, since the width of the antenna substrate 11 is 10 mm, the end portion 11 d on one side 11 a of the antenna substrate 11 coincides with the end portion 3 a of the metal plate 3 when the value of a is 35 mm.
- the coupling coefficient is the highest, The value decreases with increasing distance from 30 mm. Further, when the value of a is 25 mm or 35 mm, the coupling coefficient exhibits almost the same characteristics.
- the reason why the coupling coefficient is high when the antenna coil 12 is arranged in the vicinity of the end 3 a of the metal plate 3 is that the magnetic flux density is high around the end 3 a of the metal plate 3.
- the metal plate 3 receives the magnetic field transmitted from the reader / writer 120 and generates an eddy current.
- the end 3a has a higher magnetic field strength than the center portion 3b, and the metal plate 3 receives the magnetic field from the reader / writer 120. This is because magnetic energy can be efficiently transmitted to the antenna coil 12 side.
- the coupling coefficient is reduced in both cases.
- the decrease of the coupling coefficient is small with respect to the change in the value of. For example, when the values of a are 22 mm and 38 mm, the coupling coefficient is higher by about 20% when the value of a is 38 mm. Further, when the values of a are 20 mm and 40 mm, the coupling coefficient is higher by about 40% when the value of a is 40 mm.
- the metal plate 3 and the reader / writer 120 are opposed to each other, and the metal foil 4 is attached to the metal plate 3 and the antenna on the opposite side of the metal plate 3 and the antenna substrate 11 from the reader / writer 120.
- the antenna substrate 11 is adjacent to the end 3 a of the metal plate 3. In this state, the communication characteristics when the relative positional relationship between the metal foil 4 and the antenna substrate 11 was changed were evaluated.
- the metal foil 4 was a copper foil having an outer shape of 50 mm ⁇ 10 mm, and was superposed so as to cover the entire width of the antenna substrate 11 in the longitudinal direction.
- b is an overlapping distance defined in the y-axis direction from the end portion 11d on one side 11a of the antenna substrate 11 to the end portion 4a on the antenna substrate 11 side of the metal foil 4.
- the width of the antenna substrate 11 is 10 mm
- the metal foil 4 is overlapped over the entire one side 11 a via the center 12 a of the antenna coil 12. Further, when the value of b is 0 mm, the metal foil 4 is not superimposed on the antenna substrate 11 at all, and when the value of b is 10 mm, the metal foil 4 is superimposed on the entire antenna substrate 11.
- the coupling coefficient is The highest value was the same as the coupling coefficient in the antenna device according to the comparative example (coupling coefficient: 0.0053).
- the antenna device 1 by overlapping the metal foil 4 over the metal plate 3 and the antenna substrate 11, the magnetic field in the overlapping region is rebounded to suppress the inductive coupling, and is generated in the non-overlapping region. Electric current can be transmitted efficiently, and the magnetic flux from the metal plate 3 can be guided to the region of the antenna substrate 11 where the metal foil 4 is not superimposed without leaking, and efficient inductive coupling is performed. be able to. As a result, the degree of freedom of arrangement of the antenna substrate 11 with respect to the metal plate 3 can be improved while realizing a coupling coefficient equivalent to the coupling coefficient in the antenna device according to the comparative example.
- the antenna device formed by rotating the antenna coil 12 on the antenna substrate 11 has been described.
- the antenna device can be applied to an antenna device in which the antenna coil 12 is not formed on the antenna substrate 11. Not too long.
- the antenna coil 12 is wound around the magnetic sheet 20 so as to be superimposed on a part of the antenna coil 12 on the metal foil 4 disposed so as to partially overlap the metal plate 3. You may arrange. Further, the antenna coil 12 having such a configuration may be applied to the various embodiments described above.
- 1 antenna device 2 antenna module, 3 metal plate, 3a, 4a end, 3b central part, 4 metal foil, 4a end, 4b adhesive layer, 4c high conductivity metal, 4d insulating layer, 11 antenna substrate, 11a One side, 11b, other side, 12 antenna coil, 12a center, 12b bent position, 13 communication processing unit, 14 terminal unit, 20 magnetic sheet, wireless communication system, 120 reader / writer, 121 antenna, 141 outer casing, 141a inner peripheral wall 142 space
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Abstract
Description
本出願は、日本国において2012年8月23日に出願された日本特許出願番号特願2012-184183、日本国において2013年2月6日に出願された日本特許出願番号特願2013-021616、及び日本国において2013年8月6日に出願された日本特許出願番号特願2013-163537を基礎として優先権を主張するものであり、この出願は参照されることにより、本出願に援用される。
アンテナ装置1は、通信時にリーダライタ120とxy平面において対向するように配置される携帯電話機等の電子機器の筐体の内部に組み込まれる。アンテナ装置1は、電子機器の筐体の内部に組み込まれ、誘導結合されたリーダライタ120との間で通信を行うアンテナモジュール2と、電子機器の筐体内に設けられ、リーダライタ120に対向する第1の導電体となる金属板3と、電子機器の筐体内に設けられ、金属板3と重畳又は接触するとともに、アンテナモジュール2のアンテナコイル12のリーダライタ120と対向する面と反対側の面と、少なくとも一部が重畳するシート状の第2の導電体となる金属箔4とを備える。
金属板3は、たとえば携帯電話やスマートフォン、あるいはタブレットPC等の電子機器の筐体内に設けられ、アンテナモジュール2の通信時にリーダライタ120に対向する第1の導電体を構成するものである。この第1の導電体は、たとえば図3に示すスマートフォン130の筐体131の内面に貼付されたメタルカバー132や、図4に示すスマートフォン133内に収納されたバッテリパック134の金属筐体135、あるいは、図5に示すタブレットPC136の液晶モジュールの裏面に設けられた金属板137等が相当する。以下では、主に電子機器としてスマートフォン133を例に、このスマートフォン133に収納されたバッテリパック134の金属筐体135において、通信時にリーダライタ120に対向される主面を、第1の導電体を構成する金属板3として説明する。
アンテナ基板11と金属板3との間には、金属板3(第1の導電体)と重畳又は接触するとともに、アンテナ基板11のリーダライタ120と対向する面と反対側の面と、少なくとも一部が重畳するシート状の第2の導電体となる金属箔4が設けられている。金属箔4は、アンテナ基板11の一部に重畳することにより、重畳するアンテナ基板11の一部において磁界を跳ね返すことにより重畳する領域における誘導結合を抑制し、また、重畳していない領域への磁束の集中を促し、通信性能の向上を図る。
図13に示すように、金属箔4によって、アンテナ基板11の一方側11a(一方側の端部から中心まで)を覆うようにして、さらに、アンテナコイル12の中心12aから他方側11bをリーダライタ120よりも遠い方へ折り曲げるようにすると、金属箔4の端部4aの集中した磁界をより効率よく、他方側11bの磁性シート20に導くことができる。他方側11bに導かれた磁界によって、アンテナコイル12には大きな起電力を生じるので、通信特性をより向上させることができる。
図15Aに示すように、スマートフォン130の筐体131は、内面130aにアンテナ基板11が搭載される一方の筐体部材131aと、液晶パネル131cやCPU等を含む本体の制御回路、バッテリ等が搭載される他方の筐体部材131bとからなる。筐体131は、一方の筐体部材131aに蓋をするようにして、本体制御回路等が含まれる筐体部材131bに結合させることによって構成される。筐体部材131a,131bは、互いにネジ止めや係合爪と係合孔と組合せ等周知の方法によって、取り外し可能に結合される。筐体部材131aには、アンテナ基板11のほかに、カメラモジュール等他の機能モジュールがあらかじめ単一で、あるいは複合して搭載されていてもよい。アンテナ基板11等の機能モジュールが搭載された筐体部材131aは、スマートフォン130のユーザによって、筐体部材131bから取り外されて、他の機能モジュールを搭載する筐体部材が取り付けられるようにしてもよい。
上述した実施の形態では、金属箔4の主面は、金属板3のリーダライタ120と対向する面に対して平行になるように重畳あるいは接触させるように配置される。ここで、金属板3は、板状や箔状のような厚さが比較的薄いものに限らず、バッテリパックの金属缶のように金属部の厚みが相当程度ある場合もあり、金属板3と金属箔4とによる磁束のシールド効果を利用して、アンテナの所定の位置に磁界を集中させるために、バッテリパックのような金属板3の側面部分を利用するようにしてもよい。
比較例に係るアンテナ装置では、図20に示すように、金属板3とリーダライタ120とを対向させて、金属板3とアンテナ基板11との相対的な位置関係を変化させたときの通信特性について評価した。
本実施例では、図22に示すように、金属板3とリーダライタ120とを対向させて、金属板3とアンテナ基板11のリーダライタ120と反対側において、金属箔4を金属板3とアンテナ基板11に重畳させた。アンテナ基板11は、金属板3の端部3aに隣接させた。この状態で、金属箔4とアンテナ基板11との相対的な位置関係を変化させたときの通信特性について評価した。
Claims (32)
- 電子機器に組み込まれ、外部機器と電磁界信号を介して通信するアンテナ装置において、
上記電子機器の筐体内部に設けられ、上記外部機器に対向する第1の導電体と、
上記電子機器の筐体内部に設けられ、上記外部機器と誘導結合されるアンテナコイルと、
上記電子機器の筐体内部に設けられ、上記第1の導電体と重畳又は接触するとともに、上記アンテナコイルの上記外部機器と対向する面と反対側の面と、少なくとも一部が重畳するシート状の第2の導電体とを備えたアンテナ装置。 - 上記第2の導電体は、上記アンテナコイルの導線が一方向に周回する一方側と重畳し、上記アンテナコイルの上記導線が他方向に周回する他方側とは重畳しない請求項1記載のアンテナ装置。
- 上記第2の導電体は、上記アンテナコイルの上記一方側の全幅に亘って重畳する請求項2記載のアンテナ装置。
- 上記アンテナコイルは、上記第2の導電体が重畳する上記一方側の巻き数が、上記第2の導電体が重畳しない上記他方側の巻き数よりも少ない請求項2又は3記載のアンテナ装置。
- 上記アンテナコイルに、複数の上記第2の導電体が重畳されている請求項1記載のアンテナ装置。
- 上記第2の導電体は、上記電子機器内の他の構造物を回避する開口部又は切り欠き部が形成されている請求項1記載のアンテナ装置。
- 上記第2の導電体は、金属箔である請求項1記載のアンテナ装置。
- 上記アンテナコイルに上記外部機器から発信される磁界を引き込む磁性シートを更に備え、
上記磁性シートが、上記アンテナコイルの中心部分に差し込まれることで、上記外部機器と対向する筐体面の中心側では該磁性シートが上記アンテナコイルよりも上記外部機器側に位置する配置条件と、該筐体面の外周側では該アンテナコイルが該磁性シートよりも該外部機器側に位置する配置条件との両方の配置条件を満たすようにして、該アンテナコイルと該磁性シートとが互いに重畳されている請求項1記載のアンテナ装置。 - 外部機器と電磁界信号を介して通信するアンテナ装置が組み込まれた電子機器において、
上記アンテナ装置は、
上記外部機器に対向する第1の導電体と、
上記外部機器と誘導結合されるアンテナコイルと、
上記第1の導電体と重畳又は接触するとともに、上記アンテナコイルの上記外部機器と対向する面と反対側の面と、少なくとも一部が重畳するシート状の第2の導電体と、
上記外部機器との間で通信を行う通信処理部とを備える電子機器。 - 上記アンテナコイルは、上記他方側を、上記外部機器に対向する側とは反対方向に向かって屈曲していることを特徴とする請求項2記載のアンテナ装置。
- 電子機器に組み込まれ、外部機器と電磁界信号を介して通信するアンテナ装置において、
上記電子機器の筐体を構成する一方の部材の内面に設けられ、上記外部機器と誘導結合されるアンテナコイルと、
上記アンテナコイルと一部が重畳するように上記一方の部材に設けられた導電体とを備えたアンテナ装置。 - 上記導電体は、上記アンテナコイルの導線が一方向に周回する一方側と重畳し、該アンテナコイルの該導線が他方向に周回する他方側とは重畳しない請求項11記載のアンテナ装置。
- 上記導電体は、上記アンテナコイルの上記一方側の全幅に亘って重畳する請求項12記載のアンテナ装置。
- 上記アンテナコイルは、上記導電体が重畳する上記一方側の巻き数が、該導電体が重畳しない上記他方側の巻き数よりも少ない請求項12又は13記載のアンテナ装置。
- 上記アンテナコイルに、複数の上記導電体が重畳されている請求項11記載のアンテナ装置。
- 上記導電体は、上記電子機器内の他の構造物を回避する開口部又は切り欠き部が形成されている請求項11記載のアンテナ装置。
- 上記の導電体は、金属箔である請求項11記載のアンテナ装置。
- 上記アンテナコイルに上記外部機器から発信される磁界を引き込む磁性シートを更に備え、
上記磁性シートが、上記アンテナコイルの中心部分に差し込まれることで、上記外部機器と対向する筐体面の中心側では該磁性シートが上記アンテナコイルよりも上記外部機器側に位置する配置条件と、該筐体面の外周側では該アンテナコイルが該磁性シートよりも該外部機器側に位置する配置条件との両方の配置条件を満たすようにして、該アンテナコイルと該磁性シートとが互いに重畳されている請求項11記載のアンテナ装置。 - 上記アンテナコイルは、上記他方側を、上記外部機器に対向する側とは反対方向に向かって屈曲していることを特徴とする請求項12記載のアンテナ装置。
- 上記一方の部材は、その一部を構成する金属部を含み、
上記金属部は、上記導電体の一部に重畳していることを特徴とする請求項11記載のアンテナ装置。 - 上記導電体は、上記アンテナコイルの導線が一方向に周回する一方側と重畳し、上記アンテナコイルの上記導線が他方向に周回する他方側とは重畳しない請求項20記載のアンテナ装置。
- 上記導電体は、上記アンテナコイルの上記一方側の全幅に亘って重畳する請求項21記載のアンテナ装置。
- 上記アンテナコイルは、上記導電体が重畳する上記一方側の巻き数が、上記第2の導電体が重畳しない上記他方側の巻き数よりも少ない請求項21又は22記載のアンテナ装置。
- 上記アンテナコイルに、複数の上記導電体が重畳されている請求項19記載のアンテナ装置。
- 上記第導電体は、上記電子機器内の他の構造物を回避する開口部又は切り欠き部が形成されている請求項19記載のアンテナ装置。
- 上記導電体は、金属箔である請求項19記載のアンテナ装置。
- 上記アンテナコイルに上記外部機器から発信される磁界を引き込む磁性シートを更に備え、
上記磁性シートが、上記アンテナコイルの中心部分に差し込まれることで、上記外部機器と対向する筐体面の中心側では該磁性シートが上記アンテナコイルよりも上記外部機器側に位置する配置条件と、該筐体面の外周側では該アンテナコイルが該磁性シートよりも該外部機器側に位置する配置条件との両方の配置条件を満たすようにして、該アンテナコイルと該磁性シートとが互いに重畳されている請求項19記載のアンテナ装置。 - 上記アンテナコイルは、上記他方側を、上記外部機器に対向する側とは反対方向に向かって屈曲していることを特徴とする請求項21記載のアンテナ装置。
- 外部機器と電磁界信号を介して通信するアンテナ装置が組み込まれた電子機器において、
上記アンテナ装置は、
上記電子機器の筐体を構成する一方の部材の内面に設けられ、上記外部機器と誘導結合されるアンテナコイルと、
上記アンテナコイルと一部が重畳するように上記一方の部材に設けられた導電体とを備える電子機器。 - 上記一方の部材は、その一部を構成する金属部を含み、
上記金属部は、上記導電体の一部に重畳していることを特徴とする請求項29記載の電子機器。 - 電子機器に組み込まれ、外部機器と電磁界信号を介して通信するアンテナ装置において、
上記電子機器の筐体内部に設けられ、上記外部機器に対向する第1の導電体と、
上記電子機器の筐体内部に設けられ、上記外部機器と誘導結合されるアンテナコイルと、
上記電子機器の筐体内部に設けられ、上記第1の導電体の少なくとも側面の一部に沿うように近接し又は接触して配置され、上記アンテナコイルの上記外部機器と対向する面と反対側の面と、少なくとも一部が重畳するシート状の第2の導電体とを備えるアンテナ装置。 - 上記アンテナコイルに磁界を引き込む磁性シートを更に備え、
上記磁性シートが、上記アンテナコイルの中心部分に差し込まれることで、上記外部機器と対向する筐体面の中心側では該磁性シートが上記アンテナコイルよりも上記外部機器側に位置する配置条件と、該筐体面の外周側では該アンテナコイルが該磁性シートよりも該外部機器側に位置する配置条件との両方の配置条件を満たすようにして、該アンテナコイルと該磁性シートとが互いに重畳されている請求項31記載のアンテナ装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020157006696A KR102041222B1 (ko) | 2012-08-23 | 2013-08-21 | 안테나 장치 및 전자 기기 |
EP13830869.7A EP2889953B1 (en) | 2012-08-23 | 2013-08-21 | Antenna device and electronic apparatus |
CN201380044086.1A CN104584323B (zh) | 2012-08-23 | 2013-08-21 | 天线装置及电子设备 |
US14/422,636 US9748636B2 (en) | 2012-08-23 | 2013-08-21 | Antenna device and electronic apparatus |
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JP (2) | JP6279250B2 (ja) |
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CN (1) | CN104584323B (ja) |
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KR20150041321A (ko) * | 2013-10-08 | 2015-04-16 | 엘지이노텍 주식회사 | 자성시트 및 이를 포함하는 무선충전용 자성부재 |
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JP6727703B2 (ja) | 2016-05-30 | 2020-07-22 | デクセリアルズ株式会社 | アンテナ装置、及び電子機器 |
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US10622705B2 (en) | 2017-07-07 | 2020-04-14 | Wits Co., Ltd. | Antenna module and electronic device including the same |
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CN110324460B (zh) * | 2018-03-30 | 2021-04-13 | Oppo广东移动通信有限公司 | 电子设备及控制方法 |
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- 2013-08-21 WO PCT/JP2013/072259 patent/WO2014030662A1/ja active Application Filing
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Also Published As
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JP6279250B2 (ja) | 2018-02-14 |
EP2889953A4 (en) | 2016-04-27 |
JP2015053532A (ja) | 2015-03-19 |
EP2889953B1 (en) | 2020-07-08 |
CN104584323B (zh) | 2019-06-21 |
US20150249282A1 (en) | 2015-09-03 |
KR102041222B1 (ko) | 2019-11-07 |
JP2018033189A (ja) | 2018-03-01 |
US9748636B2 (en) | 2017-08-29 |
TW201414082A (zh) | 2014-04-01 |
JP6427651B2 (ja) | 2018-11-21 |
CN104584323A (zh) | 2015-04-29 |
EP2889953A1 (en) | 2015-07-01 |
KR20150046134A (ko) | 2015-04-29 |
TWI717313B (zh) | 2021-02-01 |
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