I 1111111111111111 11111 111111111111111 IIIII 111111111111111 111111111111111111
`US009515513B2
`
`c12) United States Patent
`Suzuki et al.
`
`(IO) Patent No.:
`(45) Date of Patent:
`
`US 9,515,513 B2
`Dec. 6, 2016
`
`(54) MOBILE DEVICE AND COMBO COIL
`MODULE
`
`(71) Applicant: Sony Corporation, Tokyo (JP)
`
`(72)
`
`Inventors: Katsuya Suzuki, Tokyo (JP); Kanjiro
`Shimizu, Tokyo (JP); Kuniharu
`Suzuki, Tokyo (JP)
`
`(73) Assignees: Sony Corporation, Tokyo (JP); Sony
`Mobile Communications, Inc., Tokyo
`(JP)
`
`( *) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 676 days.
`
`(21) Appl. No.: 13/892,930
`
`(22) Filed:
`
`May 13, 2013
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2013/0267170 Al * 10/2013 Chong
`
`2014/0091758 Al*
`
`2014/0145807 Al*
`
`H04B 1/3833
`455/41.1
`4/2014 Hidaka ................... H01F38/14
`320/108
`5/2014 Choi ....................... H01F38/14
`335/302
`2014/0291404 Al* 10/2014 Matsuoka .......... G06K 7/10881
`235/462.46
`2014/0306656 Al * 10/2014 Tabata .................... H01F38/14
`320/108
`2014/0362505 Al * 12/2014 Jang ..................... H05K 9/0075
`361/679.4
`H02J 7/025
`320/108
`5/2015 Lee ......................... H01F38/14
`320/108
`
`2014/0375262 Al* 12/2014 Yamaguchi .
`
`2015/0123604 Al*
`
`FOREIGN PATENT DOCUMENTS
`
`JP
`
`2011-30299 A
`
`2/2011
`
`(65)
`
`Prior Publication Data
`
`* cited by examiner
`
`US 2014/0333253 Al
`
`Nov. 13, 2014
`
`(51)
`
`(2016.01)
`(2006.01)
`(2006.01)
`(2006.01)
`
`Int. Cl.
`H02J 7102
`H0JF 27136
`H0JF 38/14
`H04B 5100
`(52) U.S. Cl.
`CPC ............. H02J 71025 (2013.01); H0JF 271365
`(2013.01); H0JF 38/14 (2013.01); H02J 50112
`(2016.02); H04B 510037 (2013.01); H04B
`510093 (2013.01)
`
`( 58) Field of Classification Search
`CPC ...... H0lF 38/14; H0lF 27/365; H02J 7/025;
`H02J 50/12; H04B 5/0037; H04B 5/0093
`See application file for complete search history.
`
`Primary Examiner - Lewis West
`(74) Attorney, Agent, or Firm - Obion, McClelland,
`Maier & Neustadt, L.L.P.
`
`ABSTRACT
`(57)
`An apparatus may include a near field communication
`(NFC) antenna coil and a wireless power receiving coil. The
`NFC antenna coil and the receiving coil may be arranged on
`a magnetic sheet. The wireless power receiving coil may be
`concentrically disposed on the magnetic sheet within an
`inner periphery of the NFC antenna coil. An inner diameter
`of the wireless power receiving coil may be greater than or
`equal to an inner diameter of reference listener antenna coil
`RL-6, of the reference listener coils specified by the NFC
`forum.
`
`19 Claims, 12 Drawing Sheets
`
`6
`
`1a
`
`2
`
`3
`
`..... l ..
`
`AD
`
`Petitioner Samsung and Google
`Ex-1006, 0001
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 1 of 12
`
`US 9,515,513 B2
`
`1
`
`2
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`
`AA
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`4
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`
`5
`
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`
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`
`Figure 1 B
`
`Petitioner Samsung and Google
`Ex-1006, 0002
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 2 of 12
`
`US 9,515,513 B2
`
`L m
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`Petitioner Samsung and Google
`Ex-1006, 0003
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 3 of 12
`
`US 9,515,513 B2
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`Petitioner Samsung and Google
`Ex-1006, 0004
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 4 of 12
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`US 9,515,513 B2
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`
`Petitioner Samsung and Google
`Ex-1006, 0005
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 5 of 12
`
`US 9,515,513 B2
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`
`Petitioner Samsung and Google
`Ex-1006, 0006
`
`

`

`z=1mm
`
`z=5mm
`
`RL-6
`
`AREA SIZE
`
`RL-6
`
`#I Conditions of
`Coil Size
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`
`Figure 6
`
`AREA SIZE
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`19.51
`864
`51.40
`489
`29.09
`1681 100.00
`
`[mm2]
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`460
`1681 100.00
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`
`Petitioner Samsung and Google
`Ex-1006, 0007
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 7 of 12
`
`US 9,515,513 B2
`
`6
`
`1a
`
`2
`
`Figure 7A
`
`2
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`5
`
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`5
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`
`5
`
`Petitioner Samsung and Google
`Ex-1006, 0008
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 8 of 12
`
`US 9,515,513 B2
`
`c:i
`Coupling C
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`
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`
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`
`Figure 8
`
`Petitioner Samsung and Google
`Ex-1006, 0009
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 9 of 12
`
`US 9,515,513 B2
`
`1b
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`
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`
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`
`Petitioner Samsung and Google
`Ex-1006, 0010
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 10 of 12
`
`US 9,515,513 B2
`
`1c
`
`6
`
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`
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`
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`
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`
`Petitioner Samsung and Google
`Ex-1006, 0011
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 11 of 12
`
`US 9,515,513 B2
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`
`Petitioner Samsung and Google
`Ex-1006, 0012
`
`

`

`U.S. Patent
`
`Dec. 6, 2016
`
`Sheet 12 of 12
`
`US 9,515,513 B2
`
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`
`Petitioner Samsung and Google
`Ex-1006, 0013
`
`

`

`US 9,515,513 B2
`
`1
`MOBILE DEVICE AND COMBO COIL
`MODULE
`
`BACKGROUND
`
`5
`
`2
`not inhibit performance characteristics of the other. Addi(cid:173)
`tionally, the arrangement and/or sizing of each of the NFC
`antenna coil and the wireless power receiving coil should be
`designed such that the influence of metallic elements
`included elsewhere in the mobile device is inhibited.
`Among other things, the present disclosure describes a
`combo coil module that provides high performance charac(cid:173)
`teristics for both an NFC antenna coil and a wireless power
`receiving coil, while preventing the influence of metallic
`10 parts in a mobile device from impairing performance of the
`combo coil module.
`A combo coil module of the present disclosure may
`include an NFC antenna coil and a wireless power receiving
`15 coil. The NFC antenna coil and the wireless power receiving
`coil may be arranged on a magnetic sheet. The wireless
`power receiving coil may be concentrically disposed on the
`magnetic sheet within an inner periphery of the NFC
`antenna coil. An inner diameter of the wireless power
`receiving coil may be greater than or equal to an inner
`diameter of reference listener antenna coil RL-6, of the
`reference listener coils specified by the NFC forum.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Technical Field
`The present disclosure relates to mobile devices, such as
`mobile telephone terminals. Specifically, the present disclo(cid:173)
`sure relates to mobile devices provided with a near field
`communication function and a wireless charging function.
`Moreover, the present disclosure is related to a combo coil
`module that is incorporated in such a mobile device, the
`combo coil combining a near field communication antenna
`coil for near field communication, and a wireless power
`receiving coil for wireless charging.
`Description of Related Art
`Mobile devices in recent years have incorporated near
`field communication (NFC) functions. NFC is an interna(cid:173)
`tional communication standard using a 13.56 MHz electro(cid:173)
`magnetic wave. NFC performs data communication at a 20
`range typically within 10 cm.
`In recent years, the function of a non-contact IC card has
`been incorporated into mobile devices. A non-contact IC
`card technique called FeliCa (trademark) from Sony Cor(cid:173)
`poration has been developed as a non-contact IC card 25
`function. Anon-contact IC card may typically utilize a 13.56
`MHz electromagnetic wave between readers/writers, and
`perform communication at 100 to 400 kbps at about a 10 cm
`range. The communication standard used by FeliCa is NFC.
`That is, NFC is an upward compatibility of FeliCa. In the 30
`present disclosure, the antenna for NFC/FeliCa is generally
`called an NFC antenna.
`Generally, an NFC antenna mounted in a mobile device
`may be influenced by metals, such as a battery pack that
`exists in the vicinity of the NFC antenna. One measure for
`mitigating the influence of metallic elements on the NFC
`antenna is by shielding the battery pack magnetically by
`arranging a magnetic sheet between, e.g., the NFC antenna
`and the battery pack which is arranged behind the NFC
`antenna. Another measure for mitigating the influence of 40
`metallic elements on an NFC antenna is by arranging the
`NFC antenna at a position substantially away from the
`battery pack such that the antenna does not experience the
`influence of the metallic elements.
`Furthermore, when a mobile device has a function of
`wirelessly charging a battery mounted inside the mobile
`device, a wireless power receiving coil may be arranged in
`the mobile device. The wireless power receiving coil typi(cid:173)
`cally has a specified plane coil structure of about a 30 mm
`diameter.
`
`A more complete appreciation of this disclosure and many
`of the attendant advantages thereof will be readily obtained
`as the same becomes better understood by reference to the
`following detailed description when considered in connec(cid:173)
`tion with the accompanying drawings, wherein:
`FIGS. lA and lB respectively illustrate a top view and a
`cross-sectional view of an exemplary combo coil module;
`FIGS. 2A and 2B respectively illustrate a top view and
`cross-sectional view of exemplary mobile device that
`35 includes an exemplary combo coil module;
`FIGS. 3A and 3B respectively illustrate a top view and a
`cross-sectional view of an exemplary mobile device that
`includes an exemplary combo coil module formed integrally
`with a battery pack;
`FIGS. 4A to 4C illustrate dimensions of three types of
`reference listener device coils that are specified by the NFC
`forum;
`FIGS. SA to SC illustrate an exemplary method of deter(cid:173)
`mining dimensional characteristics of an NFC antenna coil
`45 and a wireless power receiving coil with respect to reference
`listener coils RL-1, RL-3, and RL-6, which are shown in
`FIGS. SA through SC;
`FIG. 6 illustrates exemplary experimental results from a
`magnetic field simulation using an exemplary combo coil
`50 module and a reference listener coil;
`FIGS. 7A and 7B respectively illustrate a top view and a
`cross-sectional view of an exemplary combo coil module
`that includes a resonance coil;
`FIG. 8 illustrates an exemplary equivalent circuit diagram
`55 showing the relationship between an NFC antenna coil, a
`resonance coil, and an opposing antenna;
`FIGS. 9A and 9B provide non-limiting examples of
`another aspect of the present disclosure in which an NFC
`antenna coil and a wireless power receiving coil are embed-
`60 ded within a magnetic sheet to form a combo coil module;
`FIGS. lOA and lOB respectively illustrate a top view and
`cross-sectional view of an exemplary combo coil module
`that includes a resonance coil embedded in the combo coil
`module's magnetic sheet;
`FIGS. llA and llB provide non-limiting examples of
`altering a size of a combo coil module based on a size of
`mobile device in which the combo coil mobile is used;
`
`SUMMARY
`
`The foregoing general description of illustrative embodi(cid:173)
`ments and the following detailed description thereof are
`merely exemplary aspects of the teachings of this disclosure,
`and are not restrictive.
`Design limitations on mobile devices restrict the ability to
`simultaneously mount a wireless power receiving coil and
`an NFC antenna coil when wireless charging and near field
`communication are desired in the same mobile device.
`Additionally, performance characteristics of both the NFC
`antenna coil and the wireless power receiving coil should be
`considered when designing the arrangement and size of each
`coil module. That is, the arrangement and/or sizing of each 65
`of the NFC antenna coil and the wireless power receiving
`coil should be designed such that, e.g., one side of a coil does
`
`Petitioner Samsung and Google
`Ex-1006, 0014
`
`

`

`US 9,515,513 B2
`
`3
`FIG. 12A provides a non-limiting example of a combo
`coil module that has not been resized to accommodate
`increases in size of a battery pack; and
`FIG. 12B illustrates a combo coil module that has been
`resized to accommodate a larger battery pack.
`
`5
`
`4
`the magnetically permeable magnetic sheet 2, a magnetic
`flux that is generated from the NFC antenna coil 3 that
`opposes the combo coil module 1 may flow through the
`inside of the magnetic sheet 2 without a magnetic loss such
`that the magnetic flux is concentrated in the magnetic sheet
`2.
`
`DETAILED DESCRIPTION
`
`Referring now to the drawings, wherein like reference
`identical or corresponding parts
`numerals designate
`throughout the several views.
`First, FIGS. lA and lB respectively illustrate a top view
`and a cross-sectional view of an exemplary combo coil
`module 1. In particular, FIG. lB illustrates a cross-sectional
`view corresponding to line AA shown in FIG. lA. For
`simplicity, detailed wiring and connection points for the
`combo coil module 1 are omitted from the figures.
`As shown in FIG. lA, the exemplary combo coil module
`1 may include a wireless power receiving coil 4 concentri(cid:173)
`cally disposed within an inner edge 3a of an NFC antenna
`coil 3. The NFC antenna coil 3 and the wireless power
`receiving coil 4 may be arranged upon a magnetic sheet 2.
`The magnetic sheet 2 may be sized such that the perfor(cid:173)
`mance characteristics of elements arranged within the
`combo coil module 1 are not influenced by external metal
`objects, such as a battery pack within a mobile device. In the
`case in which the magnetic sheet 2 is included for preventing
`influence of a battery pack, the magnetic sheet 2 may be
`sized such that it is substantially the same size of the
`corresponding battery pack. Further, dimensions of the mag(cid:173)
`netic sheet 2 may be greater than or equal to dimensions of
`the battery pack. Moreover, the magnetic sheet 2 may have
`dimensions corresponding to another element in a mobile
`phone device to mitigate influence of the element on the
`performance of the combo coil module 1.
`The NFC antenna coil 3 and the wireless power receiving
`coil 4 may be mounted on the magnetic sheet 2 such that a
`mobile device battery is separated from the NFC antenna
`coil 3 and the wireless power receiving coil 4 by the
`magnetic sheet 2 ( e.g., the battery is housed behind the
`magnetic sheet 2 when installed in a mobile device).
`Referring now to FIG. lB, the NFC antenna coil 3 and the
`wireless power receiving coil 4 may be mounted on the
`magnetic sheet 2 by an affixing element 5. The affixing
`element 5 may, e.g., be double-sided tape or another suitable 45
`adhesive agent. While FIG. lB illustrates the NFC antenna
`coil 3 and the wireless power receiving coil 4 as being
`mounted flush with a top surface of the magnetic sheet 2, this
`arrangement should not be construed as limiting.
`Both the NFC antenna coil 3 and the wireless power 50
`receiving coil 4 may be formed by winding electroconduc(cid:173)
`tive wire multiple times to form the respective antenna/coil.
`Usually, the thickness (i.e., a width of a coil's perimeter
`edge, such as inner edge 3a) of the wireless power receiving
`coil 4 is greater than the thickness of the NFC antenna coil 55
`3. However, this should not be construed as limiting, and it
`should be appreciated that the thickness of the NFC antenna
`coil 3 may be equal to or greater than the thickness of the
`wireless power receiving coil 4.
`As previously mentioned, the magnetic sheet 2 may be 60
`included in the combo coil module 1 for mitigating the
`influence of metallic objects (e.g., a battery pack) located
`within a predetermined proximity of the combo coil module
`1. As a non-limiting example, the magnetic sheet 2 may be
`formed by ferrous materials with comparatively high mag- 65
`netic permeability with respect to a target frequency corre(cid:173)
`sponding to the combo coil module 1. With the presence of
`
`Next, FIGS. 2A and 2B respectively illustrate a top view
`and cross-sectional view of a non-limiting example of a
`mobile device 10 that includes the exemplary combo coil
`10 module 1. Specifically, FIG. 2B provides a cross-sectional
`view corresponding to line AB shown in FIG. 2A. The
`mobile device 10 illustrated in this example may, e.g., be a
`cellular telephone, a smartphone, a tablet computer, or the
`like. For simplicity, elements that are typical to mobile
`15 devices, such as a display screen, are omitted in the draw(cid:173)
`ings.
`In the exemplary case of FIGS. 2Aand 2B, the combo coil
`module 1 is arranged within the mobile device 10 at a
`location corresponding to a battery pack 9. That is, the
`20 battery pack 9 is located at a position within the mobile
`device 10 that is behind the magnetic sheet 2. The mobile
`device 10 may include a battery cover 12, which may have
`dimensions corresponding to those of the mobile device 10.
`Alternatively, the battery cover 12 may have dimensions
`25 corresponding to the battery pack 9. The battery pack 9 may
`be a direct current (DC) power source for providing wireless
`power to the mobile device 10. Additionally, the battery pack
`9 may include and/or interface with power circuitry for
`powering the mobile device 10 and/or charging the battery
`30 pack 9. The power circuitry may receive power from an
`alternating current (AC) power source.
`While the examples shown in FIGS. 2A and 2B illustrate
`the case in which the combo coil module 1 is formed as a
`separate body from the battery pack 9, this should not be
`35 construed as limiting. As a non-limiting example, FIGS. 3A
`and 3B respectively illustrate a top view and a cross(cid:173)
`sectional view of a mobile device 10a in which the combo
`coil module 1 is formed integrally with the battery pack 9.
`Referring to FIG. 3B, the combo coil module 1 may be
`40 mounted on a top surface of the battery pack 9 within the
`mobile device 10a. The combo coil module 1 of FIG. 3B
`may be mounted to the battery pack 9 by use of a common
`adhesive agent/method.
`Next, as an operational mode of a mobile device that
`includes a near field communication function, there com(cid:173)
`monly exists a read/write (R/W) mode and a card emulation
`mode. In R/W mode, a mobile device may function as a
`reader/writer (initiator) that reads/writes from/to an external
`NFC tag (namely, a target). In card emulation mode, a
`mobile device may become a target and function as a
`non-contact IC card accessed from an external initiator. In
`R/W mode, operation of a mobile device that includes a near
`field communication function may be tested with a device
`called a reference listener. Three exemplary reference lis(cid:173)
`tener devices specified by the NFC forum include RL-1,
`RL-3, and RL-6. In card emulation mode, operation of a
`mobile device that includes a near field communication
`function may be tested with a device called a reference polar.
`The dimensions of three types ofreference listener device
`coils that are specified by the NFC forum are respectively
`shown in FIGS. 4A through 4C. The reference listener coils
`shown in FIGS. 4A through 4C are comprised of a wire
`wound multiple times in a substantially rectangular shape.
`Further, each reference listener coil includes an inner diam(cid:173)
`eter and an outer diameter corresponding to a distance
`between an outer edge and an inner edge, respectively, of the
`longitudinal sides of the reference listener coils. For
`
`Petitioner Samsung and Google
`Ex-1006, 0015
`
`

`

`US 9,515,513 B2
`
`5
`example, the reference listener coil RL-1 of FIG. 4A is
`illustrated as having inner diameters of35.5 millimeters and
`65.6 millimeters. Similarly, the reference listener coil RL-1
`of FIG. 4A is shown as having outer diameters of 41.5
`millimeters and 71.6 millimeters. Inner and outer diameters
`of the reference listener coils RL-3 and RL-6 of FIGS. 4B
`and 4C, respectively, are similarly illustrated in the figures.
`Regarding the respective sizes of the reference listener coils
`of FIGS. 4A through 4C, reference listener coil RL-1 is the
`largest of the three coils, and reference listener coil RL-6 is 10
`the smallest of the three coils.
`The size/dimension of the NFC antenna coil 3 and the
`wireless power receiving coil 4 may be determined based on
`the reference listener coils of FIGS. 4A to 4C. Determining 15
`a size/dimension of the NFC antenna coil 3 and the wireless
`power receiving coil 4 based on the reference listener coils
`of FIGS. 4A to 4C enables the reduction of adverse perfor(cid:173)
`mance effects of the NFC antenna and wireless power
`receiving coils with respect to each other when they are
`simultaneously mounted on the combo coil module 1.
`An exemplary method of determining dimensional char(cid:173)
`acteristics of the NFC antenna coil 3 and the wireless power
`receiving coil 4 with respect to the reference listener coils
`RL-1, RL-3, and RL-6, is shown in FIGS. SA through SC.
`Hereinafter, the reference listener coils RL-1, RL-3, and
`RL-6 may respectively shown/described as opposing anten(cid:173)
`nas 11, 13, and 16. The opposing antennas 11, 13, and 16 are
`referred to as opposing antennas since reference listener
`antennas are typically used by facing (i.e., "opposing") the 30
`reference listener antenna to the combo coil module.
`Each of FIGS. SA through SC illustrates one of the three
`reference listener antennas overlapping the combo coil mod(cid:173)
`ule 1. The reference listener coils overlapping the combo
`coil module 1 are assumed to be of a different dimension 35
`than the combo coil module 1. Further, it is assumed that the
`reference listener coil overlapping the combo coil module 1
`is aligned at a common center point of both the reference
`listener coil and the combo coil. However, these assump(cid:173)
`tions should not be construed as limiting.
`Referring first to FIG. SA, in a non-limiting example, a
`size (namely, an outer diameter) of an outermost periphery
`of the NFC antenna coil 3 may be determined in the
`exemplary method of FIG. SA such that it corresponds to a
`size of the biggest antenna (i.e. RL-1) among opposing
`antennas 11, 13, and 16. Further, the NFC antenna coil 3 may
`be formed by winding a wire toward an inner side of the coil
`from the outermost periphery such that a desired inductance
`can be obtained from the NFC antenna coil 3.
`Next, FIG. SB illustrates a non-limiting example of a
`method of determining dimensions of an outer diameter of
`the wireless power receiving coil 4. Referring to FIG. SB,
`the outer diameter of the wireless power receiving coil 4
`may be determined such that it is smaller than an internal
`diameter of the opposing antenna 13. The condition of
`forming the outer diameter of the wireless power receiving
`coil 4 such that it is smaller than the internal diameter of the
`opposing antenna 13 is intended to make as small as possible
`the surface area in which the wireless power receiving coil
`4 interrupts the magnetic field of the NFC antenna coil 3
`with respect to the opposing antenna 13. In this way, a
`magnetic field of the NFC antenna coil 3 may pass through
`the space in the internal diameter of the wireless power
`receiving coil 4, thereby coupling it with the opposing
`antenna 16. Careful design consideration under this condi(cid:173)
`tion ensures that the surface area of the wireless power
`receiving coil 4 comprises the minimum surface area that
`
`6
`interrupts the magnetic field of the NFC antenna coil 3 to the
`opposing antenna 11 and the opposing antenna 13.
`Next, FIG. SC illustrates an exemplary method of deter(cid:173)
`mining a size (namely, an internal diameter) of the innermost
`5 periphery of the wireless power receiving coil 4. In the
`example of FIG. SC the internal diameter of the wireless
`power receiving coil 4 is determined such that it is substan(cid:173)
`tially the same or greater than the internal diameter of the
`opposing antenna 16.
`Lastly, as previously mentioned, the NFC antenna coil 3
`and the wireless power receiving coil 4 may differ in terms
`of thickness. While not limiting, the NFC antenna coil 3 is
`assumed to be thinner than the wireless power receiving coil
`4 in the foregoing examples. An NFC antenna coil exhibits
`good performance characteristics when a distance in a
`z-direction from the antenna (i.e. a direction vertical/normal
`to the antenna surface) separates the NFC antenna coil from
`a corresponding/opposing antenna. Therefore, when an NFC
`antenna coil 3 is mounted on the magnetic sheet 2 such that
`20 the performance characteristics in the z-direction are opti(cid:173)
`mized, the amount at which the thickness of a mobile device
`increases can be kept to a minimum.
`Next, FIG. 6 illustrates exemplary experimental results
`from a magnetic field simulation using the combo coil
`25 module 1 and the opposing antenna 16 (i.e. the reference
`listener antenna RL-6). The experimental results shown in
`FIG. 6 are performed under three conditions, which are
`labeled within FIG. 6 as #1, #2, and #3. The three conditions
`used in the experiment of FIG. 6 are defined as follows:
`Condition #1: Di4<Dir16, and
`Do4>Dor13.
`Condition #2: Di4;;,;Dir16, and
`Do4>Dor13.
`Condition #3: Di4;;,;Dir16, and
`Do4<Dir13.
`Referring to the above conditions, Di4 represents the
`internal diameter of the wireless power receiving coil 4.
`Dir16 represents the internal diameter of the opposing
`antenna 16 (i.e. reference listener antenna RL-6). Do4
`40 represents the outer diameter of the wireless power receiving
`coil 4. Dor13 represents the outer diameter of the opposing
`antenna 13 (i.e. the reference listener antenna RL-3). Dir13
`represents the internal diameter of the opposing antenna 13.
`The variable "z" represents a distance from the opposing
`45 antenna 16 to the combo coil module 1. In the non-limiting
`example of FIG. 6, the experimental results were performed
`with z=l millimeter and z=5 millimeters.
`Next, the "AREA SIZE" colunms shown in FIG. 6
`indicate the distribution state (mm2
`) and the degree of
`50 magnetic coupling (%) in the area where the combo coil
`module 1 opposes the opposing antenna 16. The area "a" in
`FIG. 6 is defined as an area that shows a level of favorable
`magnetic coupling. The area "b" in FIG. 6 is defined as an
`area in which the level of magnetic coupling fell from that
`55 shown in the area a. The area "c" shown in FIG. 6 is defined
`as an area in which the level of magnetic coupling is poor.
`Lastly, "T' is defined as the total area (i.e. the sum of areas
`a, b, and c).
`As shown in FIG. 6, the area a is shown to be greatest
`60 under condition #3 for both the case of z=l millimeter and
`z=5 millimeters. That is, condition #3 exhibits the best
`magnetic coupling characteristics between the NFC antenna
`3 and the opposing antenna 16. Lastly, it should be appre(cid:173)
`ciated that reference listener antenna RL-6 was chosen for
`65 illustrative purposes in the experimental results shown in the
`example of FIG. 6 due to the high level of magnetic coupling
`seen with reference listener antenna RL-6.
`
`Petitioner Samsung and Google
`Ex-1006, 0016
`
`

`

`US 9,515,513 B2
`
`7
`Next, as discussed previously, the wireless power receiv(cid:173)
`ing coil 4 may interrupt a part of a magnetic field of the NFC
`antenna coil 3 depending on the relative arrangement of the
`coils and therefore, presence of the wireless power receiving
`coil 4 may consequently reduce performance characteristics 5
`of the NFC antenna coil 3. To address this issue, aspects of
`the present disclosure may include an additional resonance
`coil on the combo coil module 1.
`As a non-limiting example of providing a resonance coil
`on a combo coil module, FIGS. 7A and 7B respectively
`illustrate a top view and a cross sectional view of a combo
`coil module la that includes a resonance coil 6. Specifically,
`FIG. 7B provides a cross-sectional view corresponding to
`the line AD shown in FIG. 7A. As shown in FIGS. 7A and
`7B, the resonance coil 6 may be arranged inside the internal 15
`diameter of the wireless power receiving coil 4, and the
`resonance coil 6 resonates with the NFC antenna coil 3.
`Consequently, it is expected that the magnetic coupling of
`the NFC antenna coil 3 and an opposing antenna (e.g.,
`antennas 11, 13, or 16) becomes strong following the
`addition of the resonance coil 6 to combo coil module la. As
`shown in FIG. 7B, the resonance coil 6 may be mounted on
`the surface of the magnetic sheet 2 within the inner diameter
`of the wireless power receiving coil 4 via the affixing
`element 5.
`Next, FIG. 8 illustrates an exemplary equivalent circuit
`diagram showing the relationship between the NFC antenna
`coil 3, the resonance coil 6, and an opposing antenna (e.g.,
`antenna 11, 13, or 16). Referring to the figure, the NFC
`antenna coil 3 may be connected with a capacitor Cl to form
`a resonance circuit of a predetermined frequency ( e.g., 13 .56
`MHz for NFC). The coil of the opposing antenna (e.g.,
`opposing antenna 11/13/16) may be connected with a
`capacitor C2 to form a resonance circuit of the predeter(cid:173)
`mined frequency. Similarly, the resonance coil 6 may be
`connected with the capacitor C3 to form a resonance circuit
`of the predetermined frequency. FIG. 8 illustrates that in
`addition to the magnetic coupling between the NFC antenna
`coil 3 and the opposing antenna 11 (or 13 or 16), there exists
`a magnetic coupling between the NFC antenna coil 3 and the
`resonance coil 6, as well as a magnetic coupling between the
`resonance coil 6 and the opposing antenna 11 (or 13 or 16).
`Next, FIGS. 9A and 9B provide non-limiting examples of
`another aspect of the present disclosure in which the NFC
`antenna coil 3 and the wireless power receiving coil 4 are
`embedded within a magnetic sheet to form a combo coil
`module. Specifically, FIG. 9B provides a cross-sectional
`view corresponding to the line AE shown in FIG. 9A.
`Referring to the figures, a magnetic sheet 2a may have a size
`corresponding to a size of the NFC antenna coil 3 and/or a 50
`battery pack. Further, the antenna coil 3 and the wireless
`power receiving coil 4 may be embedded within the mag(cid:173)
`netic sheet 2a at a thickness corresponding to the NFC
`antenna coil 3 thickness. Compared with the magnetic sheet
`2 discussed previously with respect to FIGS. lA and 1B, the 55
`thickness of the magnetic sheet 2a may be increased by an
`amount corresponding to a thickness of the NFC antenna
`coil 3.
`Referring to FIG. 9B, the affixing element 5 may be
`assumed to be an adhesive agent of negligible thickness,
`whereby only a top surface of the NFC antenna coil 3 is
`exposed from a top surface of the magnetic sheet 2a.
`Alternatively, a side portion of the NFC antenna coil 3 may
`be exposed above the magnetic sheet 2a top surface. Addi(cid:173)
`tionally, with the wireless power receiving coil 4 having a
`thickness that is greater than the NFC antenn