IP Library › Granted Patent US 12,316,137
Granted Patent B2
US 12,316,137 · App. 18/755,132 · Granted May 27, 2025

Area-apportioned wireless power antenna for maximized charging volume

Inventors: Md. Nazmul Alam (Glendale Heights, IL); Alberto Peralta (Chicago, IL)
Assignee: NuCurrent, Inc.
H02J50/23H01F38/14H01Q7/00H02J50/40
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Quick Facts
Patent No.
US 12,316,137
App. No.
18/755,132
Granted
May 27, 2025
Kind
B2
Abstract

An antenna for wireless power transfer includes a first antenna portion and a second antenna portion. The first antenna portion includes a first antenna terminal, a second antenna terminal, at least one first inner turn, at least one first outer turn, and a first wire crossover electrically connecting the at least one first inner turn with the at least one second outer turn. The antenna further includes a second antenna portion including a third antenna terminal, a fourth antenna terminal, at least one second inner turn, at least one second outer turn, and a second wire crossover electrically connecting the at least one second inner turn with the at least one second outer turn. The second antenna terminal is in electrical connection with the third antenna terminal and the first antenna terminal and fourth antenna terminal are configured for electrical connection with a transmitter circuit.

Claims (65)

1. A wireless transmitter for wireless power transfer to multiple wireless receivers, the wireless transmitter comprising:

a transmitter circuit configured to generate a wireless power signal for transmission, the transmitter circuit comprising:

a controller configured to generate a driving signal, the driving signal configured to drive a transmitter antenna at an operating frequency range to generate the wireless power signal;

a power conditioning system comprising at least an amplifier configured to receive the driving signal from the controller and generate the wireless power signal based on the operating frequency range; and

a transmitter tuning system; and

the transmitter antenna comprising a conductive wire, the conductive wire including:

a first antenna portion including:

a first antenna terminal,

a second antenna terminal,

at least one first inner turn, and

a first plurality of outer turns including:

an outermost turn, at least one intermediate outer turn positioned inward of the outermost turn, and an innermost outer turn, and

a first plurality of wire crossovers, wherein each of the first plurality of outer turns is in electrical connection with an adjacent turn positioned inward by one of the first plurality of wire crossovers, wherein the innermost outer turn of the first plurality of outer turns is in electrical connection with the at least one first inner turn by a final crossover of the first plurality of wire crossovers, and

a second antenna portion including:

a third antenna terminal,

fourth antenna terminal,

at least one second inner turn, and

a second plurality of outer turns including:

an outermost turn, at least one intermediate outer turn positioned inward of the outermost turn, and an innermost outer turn, and

a second plurality of wire crossovers, wherein each of the second plurality of outer turns is in electrical connection with an adjacent turn positioned inward by one of the second plurality of wire crossovers, wherein the innermost outer turn of the second plurality of outer turns is in electrical connection with the at least one second inner turn by a final crossover of the second plurality of wire crossovers,

wherein the second antenna terminal is in electrical connection with the third antenna terminal,

wherein at least one component of the transmitter tuning system intersects a signal path between the second antenna terminal and the third antenna terminal,

wherein the first antenna terminal and fourth antenna terminal are in electrical connection with the transmitter circuit, and

wherein the transmitter antenna is configured to transmit the wireless power signal to more than one receiver antenna.

2. The wireless transmitter of claim 1 , wherein the first antenna portion is configured to couple with a first wireless receiver system, and

the second antenna portion is configured to couple with a second wireless receiver system.

3. The wireless transmitter of claim 2 , wherein the transmitter antenna is configured to simultaneously transmit the wireless power signal to the first wireless receiver system and the second wireless receiver system.

4. The wireless transmitter of claim 1 , wherein the conductive wire is a continuous conductive wire, extending from the first antenna terminal to the fourth antenna terminal.

5. The wireless transmitter of claim 1 , wherein the operating frequency range is based on an operating frequency of about 6.78 megahertz (MHz).

6. The wireless transmitter of claim 1 , wherein the first antenna portion is configured to couple with a first wireless receiver system,

the second antenna portion is configured to couple with a second wireless receiver system, and

the amplifier is configured to simultaneously drive the first antenna portion and the second antenna portion to provide the wireless power signal to the first wireless receiver system and the second wireless receiver system.

7. The wireless transmitter of claim 1 , wherein the at least one first inner turn and the at least one second inner turn both include a single inner turn.

8. The wireless transmitter of claim 1 , wherein the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal is configured to isolate a first magnetic field of the first antenna portion from a second magnetic field of the second antenna portion.

9. The wireless transmitter of claim 1 , wherein the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal phase shifts a waveform of the wireless power signal.

10. The wireless transmitter of claim 1 , wherein a phase shift of a waveform of the wireless power signal is about 90 degrees when the wireless power signal passes, in series, from the first antenna portion to the second antenna portion through the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal.

11. A wireless transmitter for wireless power transfer to multiple wireless receivers, the wireless transmitter comprising:

a transmitter antenna comprising a conductive wire, the conductive wire including:

a first antenna portion including:

a first antenna terminal,

a second antenna terminal,

at least one first inner turn, and

a first plurality of outer turns including:

an outermost turn, at least one intermediate outer turn positioned inward of the outermost turn, and an innermost outer turn, and a first plurality of wire crossovers, wherein each of the first plurality of outer turns is in electrical connection with an adjacent turn positioned inward by one of the first plurality of wire crossovers, wherein the innermost outer turn of the first plurality of outer turns is in electrical connection with the at least one first inner turn by a final crossover of the first plurality of wire crossovers, and

a second antenna portion including:

a third antenna terminal,

a fourth antenna terminal,

at least one second inner turn, and

a second plurality of outer turns including:

an outermost turn, at least one intermediate outer turn positioned inward of the outermost turn, and an innermost outer turn, and

a second plurality of wire crossovers, wherein each of the second plurality of outer turns is in electrical connection with an adjacent turn positioned inward by one of the second plurality of wire crossovers, wherein the innermost outer turn of the second plurality of outer turns is in electrical connection with the at least one second inner turn by a final crossover of the second plurality of wire crossovers,

wherein the second antenna terminal is in electrical connection with the third antenna terminal; and

a transmitter circuit configured to generate a wireless power signal for transmission, the transmitter circuit comprising:

a controller configured to generate a driving signal, the driving signal configured to drive the transmitter antenna at an operating frequency range to generate the wireless power signal;

a power conditioning system comprising at least an amplifier configured to receive the driving signal from the controller and generate the wireless power signal based on the operating frequency range; and

a transmitter tuning system comprising at least one component intersecting a signal path between the second antenna terminal and the third antenna terminal, wherein the one or more components are configured to shift a phase of the wireless power signal when it passes, in series, from the first antenna portion to the second antenna portion; and

wherein the first antenna terminal and fourth antenna terminal are in electrical connection with the transmitter circuit,

wherein the first antenna portion is configured to couple with a first wireless receiver system,

wherein the second antenna portion is configured to couple with a second wireless receiver system, and

wherein the transmitter antenna is configured to simultaneously transmit the wireless power signal to the first wireless receiver system and the second wireless receiver system.

12. The wireless transmitter of claim 11 , wherein the conductive wire is a continuous conductive wire, extending from the first antenna terminal to the fourth antenna terminal.

13. The wireless transmitter of claim 11 , wherein the operating frequency range is based on an operating frequency of about 6.78 megahertz (MHz).

14. The wireless transmitter of claim 11 , wherein the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal is configured to isolate a first magnetic field of the first antenna portion from a second magnetic field of the second antenna portion.

15. The wireless transmitter of claim 11 , wherein the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal phase shifts a waveform of the wireless power signal.

16. The wireless transmitter of claim 11 , wherein a phase shift of a waveform of the wireless power signal is about 90 degrees when the wireless power signal passes, in series, from the first antenna portion to the second antenna portion through the at least one component of the transmitter tuning system intersecting the signal path between the second antenna terminal and the third antenna terminal.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 11, 2024
From: ALAM, MD. NAZMUL; PERALTA, ALBERTO
To: NUCURRENT, INC.
Reel/Frame 068874/0412 →
Continuity (4)
Continuation 18321467 · May 22, 2023
Continuation 17699598 · Mar 21, 2022
Continuation 16938625 · Jul 24, 2020
Related Publication 20250030274A1 · Jan 23, 2025
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