Interleaved coil and ferrite configuration to facilitate near field coupling

Patent metadata

Field	Value
Publication number	US-9722673-B2
Application number	US-201113976078-A
Country	US
Kind code	B2
Filing date	Dec 21, 2011
Priority date	Dec 21, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

Described herein are techniques related to near field coupling (e.g., wireless power transfers (WPF) and near field communications (NFC)) operations among others. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

First claim

What is claimed is:

1. An interleaved antenna assembly comprising:
a coil configured to be mounted to a device, the coil includes a first and a second generally planar coil portions, and an aperture that is disposed in between the first and second generally planar coil portions; and
a partial “S” shaped-flux guide made from a sheet of ferrite that is disposed to: cover and substantially wrap the first generally planar coil portion; pass through the aperture of the coil to form an offsetting guide portion of the partial “S” shaped-flux guide; and extending over to cover an upper planar portion of the second generally planar coil portion.

2. An antenna assembly as recited in claim 1 , wherein the first and second generally planar coil portions are disposed at an offset position from one another, and the first and second generally planar coil portions extend in a direction perpendicular to the offsetting guide portion of the partial “S” shaped-flux guide.

3. An antenna assembly, as recited in claim 1 , wherein the sheet of ferrite is a continuous sheet of ferrite.

4. An antenna assembly comprising:
a coil that includes a first planar coil element and a second planar coil element;
an aperture that is disposed across and between the first and second planar coil elements;
a partial “S” shaped-flux guide that is interleaved with the coil through the aperture, wherein the partial “S” shaped-flux guide is disposed to: cover and substantially wrap the first planar coil element; pass through the aperture of the coil to form an offsetting guide portion of the partial “S” shaped flux guide; and extending over to cover an upper planar portion of the second planar coil element.

5. The antenna assembly as recited in claim 4 , wherein the partial “S” shaped-flux guide is a continuous sheet of ferrite.

6. The antenna assembly as recited in claim 4 , wherein the partial “S” shaped-flux guide defines a first and a second generally planar guide portions, the first and second planar guide portions being adjacent to the first and second planar coil elements, respectively.

7. The antenna assembly as recited in claim 6 wherein the first and second planar guide elements are on opposite sides of the coil.

8. The antenna assembly as recited in claim 4 , further comprising a guide extension of the partial “S” shaped-flux guide extending beyond an edge of the coil.

9. The antenna assembly as recited in claim 8 , further comprising a different aperture that is formed and disposed in between a third and fourth planar coil elements.

10. The antenna assembly as recited in claim 9 , wherein the first, second, third, and fourth planar coil elements are integrated to form a single coil.

11. The antenna assembly as recited in claim 9 , wherein the coils is configured as a figure 8.

12. The antenna assembly as recited in claim 8 , wherein the guide extension is generally perpendicular to the coil.

13. The antenna assembly as recited in claim 4 , wherein the partial “S” shape-flux guide is disposed in between a metallic component and the coil.

14. A portable electronic device comprising:
a housing;
a coil installed inside the housing, wherein the coil includes a first and a second generally planar coil elements, and an aperture that is disposed in between the first and second generally planar coil elements;
a partial “S” shaped-flux guide made from a sheet of ferrite that is disposed to: cover and substantially wrap the first generally planar coil element; pass through the aperture of the coil to form an offsetting guide portion of the partial “S” shaped-flux guide; and extending over to cover an upper planar portion of the second generally planar coil element.

15. A portable electronic device as recited in claim 14 , wherein the partial “S” shaped-flux guide is a continuous sheet of ferrite.

16. A portable electronic device as recited in claim 14 , wherein the partial “S” shaped-flux guide defines a first and a second generally planar guide portions, wherein the first and the second planar guide portions being adjacent to the first and second planar coil elements, respectively.

17. A portable electronic device as recited in claim 16 , wherein the first and second planar guide portions are on opposite sides of the coil.

18. A portable electronic device as recited in claim 14 , further comprising a guide extension of the partial “S” shaped-flux guide portion extending beyond an edge of the coil.

19. A portable electronic device as recited in claim 18 , further comprising a different aperture that is formed and disposed in between a third and fourth planar coil elements.

20. A portable electronic device as recited in claim 19 , wherein the first, second, third, and fourth planar coil elements are integrated to form a single coil.

21. A portable electronic device as recited in claim 19 , wherein the coil is configured as a figure 8.

22. A portable electronic device as recited in claim 18 , wherein the guide extension is generally perpendicular to the coil.

23. A portable electronic device as recited in claim 16 , wherein the coil has a resonate frequency selected from the group consisting of 6.78 MHz and 13.56 MHz.

Assignees

• Yang Songnan
• Cooper Emily B
• Gallahan Ronald W
• Intel Corp

Inventors

• Yang Songnan
• Cooper Emily B
• Gallahan Ronald W
• Rea Adam D

Classifications

• H04B5/266

  One coil at each side, e.g. with primary and secondary coils · CPC title

• H04B5/0037

  Electricity · mapped topic

• H01Q1/243

  with built-in antennas · CPC title

• H04B5/0031

  Electricity · mapped topic

• H04B5/0081 Primary

  Electricity · mapped topic