Electronic device for reducing interference between a charging coil and an antenna

• US 10,446,318 B2
• Filed: 12/11/2017
• Issued: 10/15/2019
• Est. Priority Date: 01/04/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Woo-Ram, Kim, Ki-Hyun, Park, Jin-Hyoung, Ko, Kil-Soo, Kim, Joon-Il, Park, Sung-Kweon, Park, Se-Ho
• Primary Examiner(s): Levi, Dameon E
• Assistant Examiner(s): Islam, Hasan Z
• Application Number:
  US15/837,429
• Publication Number:
  US 20180102212A1
• Time in Patent Office: 673 Days
• Field of Search: 320108, 343741, 343742, 343788, 343866, 343867
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• 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: 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 50/20 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 15/02 Reducing interference from electric apparatus by means located at or near the interfering apparatus
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Disclosed is an electronic device including a battery, a case covering the battery, a wireless charging coil positioned between the battery and the case; and a communication antenna positioned between the battery and the wireless charging coil, wherein one of the communication antenna and the wireless charging coil is positioned to surround the other one of the communication antenna and the wireless charging coil, and wherein the communication antenna is spaced from the wireless charging coil by a predetermined distance and prevents interference between the communication antenna and the wireless charging coil.

Claims

1. An electronic device comprising:

a battery;

a housing covering a rear side of the electronic device;

a wireless charging coil positioned between the housing and the battery and configured to receive wireless power based on an electromagnetic field for charging the battery; and

an antenna positioned between the housing and the battery, and configured to enable the electronic device to perform a near field communication,

wherein the wireless charging coil is closer to an outer surface of the housing than the antenna and spaced from the antenna by a predetermined distance to prevent the antenna from overlapping the wireless charging coil, and

wherein the wireless charging coil is positioned to surround the antenna.

2. The electronic device of claim 1, wherein the antenna is positioned to surround the wireless charging coil.

3. The electronic device of claim 1, wherein the wireless charging coil is electrically connected to the electronic device.

4. The electronic device of claim 1, wherein the antenna is electrically connected to the electronic device.

5. The electronic device of claim 1, further comprising a shielding portion disposed along the wireless charging coil and having a shape corresponding to a shape of the wireless charging coil.

6. The electronic device of claim 5, wherein the shielding portion is made from ferrite or a polymer.

7. The electronic device of claim 5, wherein the housing is formed with a seating groove for seating the wireless charging coil and the shielding portion.

8. The electronic device of claim 1, wherein the antenna uses frequency bands ranging from 12 to 14 megahertz (MHz), and the wireless charging coil uses frequency bands ranging from 100 kilohertz (KHz) to 14 MHz.