Patent ID: 11894692
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A wireless power transmission device comprising:
at least one power transmission antenna configured to sequentially transmit a plurality of different RF waves;
a communication circuit; and
at least one processor,
wherein the at least one power transmission antenna is configured to form a reference sub-RF wave on a first antenna among the at least one power transmission antenna and sequentially form a plurality of different sub-RF waves on a second antenna among the at least one power transmission antenna for a certain period in at least part of an operation of sequentially transmitting the plurality of different RF waves,
wherein the at least one processor is configured to receive a communication signal including information about an optimum phase value from a wireless power reception device through the communication circuit,
wherein the optimum phase value is identified based on a plurality of pieces of strength information indicating respective strengths of the plurality of different RF waves and a plurality of pieces of phase information corresponding to respective ones among the plurality of different RF waves, which are identified by the wireless power reception device,
wherein the at least one power transmission antenna is configured to form a sub-RF wave having the optimum phase value on the second antenna in response to the at least one processor receiving the communication signal including the information about the optimum phase value through the communication circuit,
wherein the at least one power transmission antenna is configured to form a plurality of different sub-RF waves on a third antenna among the at least one power transmission antenna, while forming the reference sub-RF wave on the first antenna and forming the sub-RF wave having the optimum phase value on the second antenna,
wherein the at least one processor is configured to receive a second communication signal including information about a second optimum phase value from the wireless power reception device through the communication circuit,
wherein the second optimum phase value is identified based on a plurality of pieces of second strength information indicating respective strengths of a plurality of different second RF waves and a plurality of pieces of second phase information corresponding to respective ones among the plurality of different second RF waves, which are identified by the wireless power device, and
wherein the at least one power transmission antenna is configured to form a sub-RF wave having the second optimum phase value on the third antenna in response to the at least one processor receiving the second communication signal including the information about the second optimum phase value through the communication circuit.