NON-UNIFORM SPACING IN WIRELESS RESONATOR COIL

• US 20150162128A1
• Filed: 06/27/2014
• Published: 06/11/2015
• Est. Priority Date: 12/07/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Yang, Songnan, Rosenfeld, Jonathan, Kasturi, Sreenivas, Elkhouly, Essam
• Granted Patent: US 9,640,318 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 41/041 Printed circuit coils apparatus or processes for manufacturing printed circuits in general H05K3/00
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: Y10T 29/49071 by winding or coiling

Abstract

Techniques of forming a transmitter coil are described herein. The techniques may include forming turns of the transmitter coil, wherein a non-uniform spacing between the turns of the transmitter coil is to reduce a magnetic field variation associated with the transmitter coil.

Claims

1. A transmitter coil to generate a magnetic field, comprising:

a turn of the transmitter coil to propagate an electric charge; and

at least one additional turn of the transmitter coil to propagate the electric charge, wherein the propagation of electric charge from one coil turn to another coil turn generates a magnetic field, and wherein the spacing between the coil turns is non-uniform.

2. The transmitter coil of claim 1, wherein the coil turns comprise:

a first coil turn having a length of about 140 millimeters and a width of about 90 millimeters; and

a second coil turn coupled to the first coil turn, the second having a length of about 132 millimeters and a width of about 82 millimeters.

3. The transmitter coil of claim 2, wherein the coil turns comprise:

a third coil turn coupled to the second coil turn having a length of about 124 millimeters and a width of about 74 millimeters;

a fourth coil turn coupled to the third coil turn, the fourth turn having a length of about 108 millimeters and a width of about 58 millimeters.

4. The transmitter coil of claim 3, wherein the coil turns comprise:

a fifth coil turn coupled to the fourth coil turn, the fourth coil turn having a length of about 78 millimeters and a width of about 28 millimeters;

wherein the fifth coil turn is coupled to a via communicatively coupled to the first turn.

5. The transmitter coil of claim 1, wherein the transmitter coil is formed in a printed circuit board (PCB) about 143.5 millimeters long and about 91 millimeters wide.

6. The transmitter coil of claim 5, the PCB comprising more than one layer of transmitter coil, and wherein each layer is coupled at a via between the layers.

7. The transmitter coil of claim 6, wherein the transmitter coil is formed in a printed circuit board (PCB) having more than one layer, further comprising:

a plurality of traces of the transmitter coil at a bottom later of the PCB electrically coupled to at least one additional turn of the transmitter coil;

the plurality of traces comprising;

a first trace having a length of about 36.5 millimeters; and

a second trace having a length of about 45 millimeters.

8. The transmitter coil of claim 1, wherein the non-uniform spacing between the at least one additional turn of the transmitter coil is based on a plurality of variables, the variables comprising:

a length and width of the transmitter coil;

a number of turns of the transmitter coil;

a minimum spacing between the number of turns as well as a thickness of the coil; and

a minimum magnetic field variance to be emitted by the transmitter coil.

9. A method of forming a transmitter coil, comprising:

forming a turn of the transmitter coil to propagate an electric charge; and

forming at least one additional turn of the transmitter coil to propagate the electric charge, wherein the propagation of electric charge from one coil turn to another coil turn generates a magnetic field, and wherein the spacing between the coil turns is non-uniform.

10. The method of claim 9, wherein the coil turns comprise:

a first coil turn having a length of about 140 millimeters and a width of about 90 millimeters; and

a second coil turn coupled to the first coil turn, the second having a length of about 132 millimeters and a width of about 82 millimeters.

11. The method of claim 10, wherein the coil turns comprise:

a third coil turn coupled to the second coil turn having a length of about 124 millimeters and a width of about 74 millimeters;

a fourth coil turn coupled to the third coil turn, the fourth coil turn having a length of about 108 millimeters and a width of about 58 millimeters.

12. The method of claim 11, wherein the coil turns comprise:

a fifth turn coupled to the fourth turn, the fourth turn having a length of about 78 millimeters and a width of about 28 millimeters;

wherein the fifth coil turn is coupled to a via communicatively coupled to the first coil turn.

13. The method of claim 9, wherein the transmitter coil is formed in a printed circuit board (PCB) about 143.5 millimeters long and about 91 millimeters wide.

14. The method of claim 13, the PCB comprising more than one layer of transmitter coil, and wherein each layer is coupled at a via between the layers.

15. The method of claim 14, wherein the transmitter coil is formed in a printed circuit board (PCB) having more than one layer, further comprising:

forming a plurality of traces of the transmitter coil at a bottom later of the PCB electrically coupled to at least one additional turn of the transmitter coil;

the plurality of traces comprising;

a first trace having a length of about 36.5 millimeters; and

a second trace having a length of about 45 millimeters.

16. The method of claim 9, further comprising determining the non-uniform spacing between the at least one additional turns of the transmitter coil based on a plurality of variables, the variables comprising:

a length and width of the transmitter coil;

a number of turns of the transmitter coil;

a minimum spacing between the number of turns as well as a thickness of the coil; and

a minimum magnetic field variance to be emitted by the transmitter coil.

17. A method of determining optimized non-uniform spacing in a transmitter coil, comprising:

identifying a plurality of variables, comprising;

a predetermined length and width of the transmitter coil;

a predetermined number of turns of the transmitter coil;

a predetermined minimum spacing between the number of turns and a thickness of the coil; and

a predetermined minimum magnetic field variance to be emitted by the transmitter coil; and

determining an optimized spacing between the number of turns of the transmitter coil based on the identified plurality of variables.

18. The method of claim 17, wherein the non-uniform spacing between the number of turns of the transmitter coil is to reduce a magnetic field variation associated with the transmitter coil.

19. The method of claim 17, wherein determining optimized spacing between the number of turns based on the plurality of variables comprises employing a genetic algorithm to solve an optimization problem based on the determined variables.