NON-CONTACT WIRELESS COMMUNICATION COIL, TRANSMISSION COIL, AND PORTABLE WIRELESS TERMINAL

• US 20140168019A1
• Filed: 10/17/2012
• Published: 06/19/2014
• Est. Priority Date: 11/02/2011
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Uejima, Hiroyuki, Koyanagi, Yoshio, Hirobe, Takanori
• Granted Patent: US 9,607,757 B2
• Time in Patent Office: Days
• US Class Current: 343/720
• 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 5/0031 for data transfer
• CPC Class Codes: H04B 5/0037 for power transfer
• CPC Class Codes: H04B 5/0075 : using inductive coupling transformers or inductances adapted for inductive coupling H01F38/14
• CPC Class Codes: H04B 5/0087 : with multiple coils at either side
• 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 non-contact wireless communication coil includes a first coil, a second coil, a first magnetic body, and a second magnetic body. The first magnetic body, the first coil, the second magnetic body, and the second coil are laminated in this order in a thickness direction of the coils. The first coil and the second coil at least partially overlap each other.

Claims

1. A non-contact wireless communication coil comprising:

a first coil;

a second coil;

a first magnetic body; and

a second magnetic body,

wherein the first magnetic body, the first coil, the second magnetic body, and the second coil are laminated in this order in a thickness direction of the coils, and

the first coil and the second coil at least partially overlap each other.

2. The non-contact wireless communication coil according to claim 1,

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

3. The non-contact wireless communication coil according to claim 1,

wherein a resonance frequency of the first coil is lower than a resonance frequency of the second coil.

4. The non-contact wireless communication coil according to claim 1,

wherein at least a portion of the second coil overlaps an outer circumference of the first coil.

5. The non-contact wireless communication coil according to claim 1,

wherein at least a portion of the second coil is disposed outside the first coil.

6. The non-contact wireless communication coil according to claim 1,

wherein the first coil is used for non-contact power transmission and the second coil is used for non-contact wireless communication.

7. A portable wireless terminal comprising the non-contact wireless communication coil according to claim 1.

8. A transmission coil comprising:

a first coil;

a second coil;

a first magnetic body with a predetermined permeability; and

a second magnetic body with a permeability different from the predetermined permeability of the first magnetic body,

wherein the first coil is arranged on a surface of the first magnetic body and the second coil is arranged on a surface of the second magnetic body in a thickness direction of the coils,

the second magnetic body is arranged in an outer circumference of the first magnetic body in a plane direction of the coils, and

a first boundary surface between the first coil and the first magnetic body is substantially flush with a second boundary surface between the second coil and the second magnetic body, or the second boundary surface is higher than the first boundary surface in the thickness direction of the coils.

9. The transmission coil according to claim 8,

wherein a thickness of the second magnetic body with respect to a thickness of the first magnetic body is set such that the first boundary surface is substantially flush with the second boundary surface or the second boundary surface is higher than the first boundary surface in the thickness direction of the coils.

10. The transmission coil according to claim 8,

wherein a position regulation member that regulates a position of the second magnetic body in the thickness direction of the coils is arranged on a surface of the second magnetic body opposite to the surface on which the second coil is arranged, and

a thickness of the position regulation member is set such that the first boundary surface is substantially flush with the second boundary surface or the second boundary surface is higher than the first boundary surface in the thickness direction of the coils.

11. The transmission coil according to claim 8,

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

12. The transmission coil according to claim 8,

wherein a resonance frequency of the first coil is lower than a resonance frequency of the second coil.

13. The transmission coil according to claim 8,

wherein the first coil is used for non-contact power transmission and the second coil is used for non-contact wireless communication.

21. A portable wireless terminal comprising the transmission coil according to claim 8.

14. A transmission coil comprising:

a first coil;

a second coil;

a first magnetic body with a predetermined permeability; and

a second magnetic body with a permeability different from the predetermined permeability of the first magnetic body,

wherein the first coil is arranged on a surface of the first magnetic body,

the second magnetic body is arranged outside the first coil on the surface of the first magnetic body, and

the second coil is arranged on a surface of the second magnetic body.

15. The transmission coil according to claim 14,

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

16. The transmission coil according to claim 14,

wherein a resonance frequency of the first coil is lower than a resonance frequency of the second coil.

17. The transmission coil according to claim 14, further comprising:

a guide portion that performs guidance such that a distance between the first coil and the second coil is equal to or greater than a predetermined value.

18. The transmission coil according to claim 17,

wherein the guide portion is formed in a circumferential portion of the second magnetic body on a first coil side.

19. The transmission coil according to claim 17, further comprising:

a substrate which is arranged outside the first coil and on which the second coil is formed as a predetermined metal pattern,

wherein the guide portion is also formed in a circumferential portion of the substrate on a first coil side.

20. The transmission coil according to claim 14,

wherein the first coil is used for non-contact power transmission and the second coil is used for non-contact wireless communication.