Area-apportioned wireless power antenna for maximized charging volume
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.
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; and
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,
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 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 transmitter circuit includes a controller, the 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.
6. The wireless transmitter of claim 5 , wherein the operating frequency range is based on an operating frequency of about 6.78 megahertz (MHz).
7. The wireless transmitter of claim 5 , wherein the transmitter circuit further includes an amplifier, the amplifier configured to receive the driving signal from the controller and generate the wireless power signal based on the operating frequency range.
8. The wireless transmitter of claim 7 , 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.
9. 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.
10. A transmitter antenna for wireless power transfer to multiple wireless receivers, the transmitter antenna comprising:
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,
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,
wherein the first antenna terminal and fourth antenna terminal are configured for electrical connection with a transmitter circuit, and
wherein the transmitter antenna is configured to transmit a wireless power signal to more than one receiver antenna.
11. The transmitter antenna of claim 10 , wherein the first antenna portion is configured to couple with a first receiver antenna, and
the second antenna portion is configured to couple with a second receiver antenna.
12. The transmitter antenna of claim 11 , wherein the first antenna portion and the second antenna portion are configured to simultaneously transmit the wireless power signal to the first receiver antenna and the second receiver antenna.
13. The transmitter antenna a of claim 10 , wherein the first antenna portion and the second antenna portion comprise a continuous conductive wire, the continuous conductive wire extending from the first antenna terminal to the fourth antenna terminal.
14. The transmitter antenna of claim 13 , wherein each of the first plurality of wire crossovers and the second plurality of wire crossovers includes an insulator portion, the insulator portion positioned between a first portion of the continuous conductive wire and a second portion of the continuous conductive wire at each respective wire crossover, such positioning preventing electrical connection of the continuous conductive wire at each of the first plurality of wire crossovers and the second plurality of wire crossovers.
15. The transmitter antenna of claim 10 , wherein an operating frequency range of the transmitter antenna is based on an operating frequency of about 6.78 megahertz (MHz).
16. The transmitter antenna of claim 10 , wherein the at least one first inner turn and the at least one second inner turn both include a single inner turn.
17. 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; and
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,
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.
18. The wireless transmitter of claim 17 , wherein the conductive wire is a continuous conductive wire, extending from the first antenna terminal to the fourth antenna terminal.
19. The wireless transmitter of claim 17 , wherein the transmitter circuit includes a controller, the 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.
20. The wireless transmitter of claim 19 , wherein the operating frequency range is based on an operating frequency of about 6.78 megahertz (MHz).