TRANSMITTING ANTENNA AND TRANSMITTER FOR WIRELESS POWER CHARGING

• US 20140184155A1
• Filed: 12/18/2013
• Published: 07/03/2014
• Est. Priority Date: 12/27/2012
• Status: Abandoned Application

• Current Assignee: Korea Electronics Technology Institute (Government of South Korea)
• Original Assignee: Korea Electronics Technology Institute (Government of South Korea)
• Inventors: CHA, Cheolung
• Application Number:
  US14/132,694
• Publication Number:
  US 20140184155A1
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• 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 50/12 of the resonant type

Abstract

The present invention has been made in an effort to overcome the disadvantage that a user has to consciously adjust the positions of a wireless power transmitter and a wireless power receiver. The transmitting antenna for wireless power charging, which wirelessly transmits power to charge a device, includes a first antenna coil section for producing a magnetic field in a first direction, and a second antenna coil section for producing a magnetic field in a second direction. Accordingly, the three-dimensional transmitting antenna can minimize decreases in efficiency caused by the position and direction of the receiver and maximize reception efficiency at a particular point or within a particular range.

Claims

1. A transmitting antenna for wireless power charging, which wirelessly transmits power to charge a device, the transmitting antenna comprising:

a first antenna coil section for producing a magnetic field in a first direction; and

a second antenna coil section for producing a magnetic field in a second direction,

wherein the first magnetic field and the second magnetic field overlap at a first position.

2. The transmitting antenna of claim 1, wherein the first direction and the second direction are nearly orthogonal.

3. The transmitting antenna of claim 1, wherein

the first antenna coil section has a coil wound in a circular or rectangular shape in a first plane, and

the second antenna coil section has a coil wound along a cylindrical surface perpendicular to the first plane.

4. The transmitting antenna of claim 3, wherein the transmitting antenna for wireless power charging is installed in a cup holder.

5. The transmitting antenna of claim 1, wherein

the first antenna coil section has a structure in which a coil is wound in a -shape or rectangular shape in the first plane, and

the second antenna coil section has a structure in which a coil is wound in a -shape or rectangular shape in a second plane.

6. A transmitter for wireless power charging, which wirelessly transmits power to a receiver having a receiving antenna to charge a device, the transmitting antenna comprising:

a transmitting antenna comprising a first antenna coil section for producing a magnetic field in a first direction and a second antenna coil section for producing a magnetic field in a second direction; and

a transmitting circuit for providing an oscillation signal to enable the transmitting antenna to wirelessly transmit power.

7. The transmitter of claim 6, wherein

the first antenna coil section has a coil wound in a circular or rectangular shape in a first plane, and

the second antenna coil section has a coil wound along a cylindrical surface perpendicular to the first plane.

8. The transmitter of claim 6, wherein

the first antenna coil section has a structure in which a coil is wound in a -shape or rectangular shape in the first plane, and

the second antenna coil section has a structure in which a coil is wound in a -shape or rectangular shape in a second plane.

9. The transmitter of claim 6, wherein the transmitter and the receiver may have the same resonance frequency.