Non-contact wireless communication coil, transmission coil, and portable wireless terminal

• US 9,607,757 B2
• Filed: 10/17/2012
• Issued: 03/28/2017
• Est. Priority Date: 11/02/2011
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Hirobe, Takanori, Uejima, Hiroyuki, Koyanagi, Yoshio
• Primary Examiner(s): Jeanglaude, Jean B
• Application Number:
  US14/236,025
• Publication Number:
  US 20140168019A1
• Time in Patent Office: 1,623 Days
• Field of Search: 343/720
• US Class Current: 1/1
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/2208 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 methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 7/00 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
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/72 : for local intradevice communication
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer

Abstract

A chargeable communication module is provided, which includes: a wireless power charging coil; a wireless communication coil being electrically isolated from the wireless power charging coil; and a magnetic body. The wireless power charging coil is disposed on a surface of the magnetic body. The wireless communication coil is arranged peripheral to the wireless power charging coil on the surface of the magnetic body.

Claims

1. A chargeable communication module having a plane and a thickness direction extending perpendicularly to the plane, the module comprising:

a wireless power charging coil;

a wireless communication coil being electrically isolated from the wireless power charging coil;

a first magnetic sheet; and

a second magnetic sheet,

wherein the first magnetic sheet, the wireless power charging coil, the second magnetic sheet, and the wireless communication coil are disposed in this order in the thickness direction of the module, and

the wireless power charging coil and the wireless communication coil at least partially overlap each other in the thickness direction of the module.

2. The chargeable communication module according to claim 1,

wherein a permeability of the first magnetic sheet is greater than a permeability of the second magnetic sheet.

3. The chargeable communication module according to claim 1,

wherein a resonance frequency of the wireless power charging coil is lower than a resonance frequency of the wireless communication coil.

4. The chargeable communication module according to claim 1,

wherein at least a portion of the wireless communication coil overlaps an outer circumference of the wireless power charging coil.

5. The chargeable communication module according to claim 1,

wherein at least a portion of the wireless communication coil is disposed outside the wireless power charging coil.

6. A portable terminal comprising the chargeable communication module according to claim 1.

7. The chargeable communication module according to claim 1, wherein the wireless communication coil is configured to perform communication by electromagnetic induction.

8. A chargeable communication module having a plane and a thickness direction extending perpendicularly to the plane, the module comprising:

a wireless power charging coil;

a wireless communication coil being electrically isolated from the wireless power charging coil;

a first magnetic sheet having a first permeability; and

a second magnetic sheet having a second permeability different from the first permeability,

wherein the wireless power charging coil is arranged on a surface of the first magnetic sheet in the thickness direction of the module and the wireless communication coil is arranged on a surface of the second magnetic sheet in the thickness direction of the module,

the second magnetic sheet is arranged peripheral to the first magnetic sheet in the plane of the module, and

a first boundary surface between the wireless power charging coil and the first magnetic sheet is offset from a second boundary surface between the wireless communication coil and the second magnetic sheet in the thickness direction of the module.

9. The chargeable communication module according to claim 8,

wherein a thickness of the second magnetic sheet with respect to a thickness of the first magnetic sheet is set such that the first boundary surface is offset from the second boundary surface in the thickness direction of the module.

10. The chargeable communication module according to claim 8,

wherein a position regulator that regulates a position of the second magnetic sheet in the thickness direction of the module is arranged on a surface of the second magnetic sheet opposite to the surface on which the wireless communication coil is arranged, and

a thickness of the position regulator is set such that the first boundary surface is offset from the second boundary surface in the thickness direction of the module.

11. The chargeable communication module according to claim 8, wherein the first permeability of the first magnetic sheet is greater than the second permeability of the second magnetic sheet.

12. The chargeable communication module according to claim 8,

wherein a resonance frequency of the wireless power charging coil is lower than a resonance frequency of the wireless communication coil.

13. A portable terminal comprising the chargeable communication module according to claim 8.

14. The chargeable communication module according to claim 8, wherein the wireless communication coil is configured to perform communication by electromagnetic induction.

15. A chargeable communication module having a plane and a thickness direction extending perpendicularly to the plane, the module comprising:

a wireless power charging coil;

a wireless communication coil being electrically isolated from the wireless power charging coil;

a first magnetic sheet having a first permeability; and

a second magnetic sheet having a second permeability different from the first permeability,

wherein the wireless power charging coil is arranged on a surface of the first magnetic sheet,

the second magnetic sheet is arranged peripheral to the wireless power charging coil on the surface of the first magnetic sheet, and

the wireless communication coil is arranged on a surface of the second magnetic sheet.

16. The chargeable communication module according to claim 15,

wherein a resonance frequency of the wireless power charging coil is lower than a resonance frequency of the wireless communication coil.

17. The chargeable communication module according to claim 15, further comprising:

a guide that sets a distance between the wireless power charging coil and the wireless communication coil in the plane of the module to be equal to or greater than a predetermined value.

18. The chargeable communication module according to claim 17,

wherein the guide is formed integrally with the second magnetic sheet.

19. The chargeable communication module according to claim 17, further comprising:

a substrate which is arranged peripheral to the wireless power charging coil and having a surface on which the wireless communication coil is formed as a predetermined metal pattern,

wherein the guide is formed integrally with the substrate.

20. The chargeable communication module according to claim 15,

wherein the first permeability of the first magnetic sheet is greater than the second permeability of the second magnetic sheet.

21. The chargeable communication module according to claim 15, wherein the wireless communication coil is configured to perform communication by electromagnetic induction.

22. A chargeable communication module having a plane and a thickness direction extending perpendicularly to the plane, the module comprising:

a wireless power charging coil;

a wireless communication coil being electrically isolated from the wireless power charging coil; and

a magnetic sheet;

wherein the wireless power charging coil is disposed on a surface of the magnetic sheet, and

the wireless communication coil is arranged peripheral to the wireless power charging coil on the surface of the magnetic sheet.

23. The chargeable communication module according to claim 22, wherein the wireless power charging coil has a first resonance frequency and the wireless communication coil has a second resonance frequency different from the first resonance frequency.

24. The chargeable communication module according to claim 23, wherein the first resonance frequency of the wireless power charging coil is lower than the second resonance frequency of the wireless communication coil.

25. The chargeable communication module according to claim 22, further comprising:

a substrate on which the wireless communication coil is arranged;

wherein the wireless communication coil is interposed between the substrate and the surface of the magnetic sheet.

26. The chargeable communication module according to claim 22, wherein the wireless communication coil has a shape including two sides that meet to define a corner portion, and

a first shortest distance between the wireless power charging coil and the wireless communication coil at the corner portion is greater than a second shortest distance between the wireless power charging coil and the wireless communication coil at one of the sides.

27. The chargeable communication module according to claim 26, wherein the wireless power charging coil has a circular shape.

28. The chargeable communication module according to claim 22, wherein a number of windings included in the wireless power charging coil is greater than a number of windings included in the wireless communication coil.

29. The chargeable communication module according to claim 22, wherein the wireless communication coil is configured to perform communication by electromagnetic induction.