Wireless power transmitter and control method therefor

1. A wireless power transmitting device comprising:

a power source;

a patch antenna;

a transceiver circuit; and

a processor configured to:

control the transceiver circuit to transmit, through the patch antenna, a first signal provided from the power source during a first period,

control the transceiver circuit to receive, through the patch antenna, a second signal based on a reflection of the first signal during a second period,

determine whether a target device is detected based on the second signal, and

in response to determination that the target device is detected, control the transceiver circuit to transmit, through the patch antenna, power to the target device,

wherein the first period does not overlap with the second period.

2. The wireless power transmitting device of claim 1 ,

wherein the transceiver circuit comprises a circulator, and

wherein the processor is further configured to:

connect, through the circulator, the transceiver circuit to an input terminal of the patch antenna during the first period, and

connect, through the circulator, the transceiver circuit to an output terminal of the patch antenna during the second period.

3. The wireless power transmitting device of claim 1 , wherein the processor is further configured to determine at least one of whether the target device is located within a power transmitting area, a position of the target device, a direction of the target device, a type of the target device, and a shape of the target device based on the second signal.

4. The wireless power transmitting device of claim 3 , wherein the processor is further configured to determine that the target device is located within the power transmitting area based on a signal output from the patch antenna at a previous time interval being different from the second signal, or based on a magnitude of the second signal being equal to or greater than a predetermined threshold value.

5. The wireless power transmitting device of claim 1 , wherein the transceiver circuit comprises at least one of:

a phase shifter configured to control phase of the first signal and the second signal by the processor, and

an attenuator configured to control magnitudes of the first signal and the second signal by the processor.

6. The wireless power transmitting device of claim 5 , further comprising:

an oscillator configured to output a third signal; and

a mixer configured to modulate the third signal and demodulate the second signal,

wherein the transceiver circuit further comprises a first switch and a second switch, and

wherein the processor is further configured to:

control the transceiver circuit to connect, using the first switch, the third signal to at least one of the phase shifter and the attenuator during the first period, and

control the transceiver circuit to connect, using the first switch, the second signal to at least one of the phase shifter and the attenuator during the second period,

control the transceiver circuit to connect, to the patch antenna using the second switch, a controlled signal output from at least one of the phase shifter and the attenuator during the first period, and

control the transceiver circuit to connect, to the mixer using the second switch, the controlled signal output from at least one of the phase shifter and the attenuator during the second period.

7. The wireless power transmitting device of claim 6 , further comprising:

a first analog-to-digital converter (ADC) configured to convert data from the processor into an analog signal and provide the analog signal to the mixer during the first period; and

a second ADC configured to convert a demodulated analog signal provided from the mixer into a digital signal and provide the digital signal to the processor during the second period.

8. A wireless power transmitting device comprising:

a power source;

a plurality of patch antennas;

a transceiver circuit; and

a processor configured to:

control the transceiver circuit to transmit, through a first part of the plurality of patch antennas, a first signal provided from the power source, and

control the transceiver circuit to receive, through a second part of the plurality of patch antennas, a second signal based on a reflection of the first signal,

determine whether a target device is detected based on the second signal, and

in response to determination that the target device is detected, control the transceiver circuit to transmit, through at least a part of the plurality of patch antennas, power to the target device.

9. The wireless power transmitting device of claim 8 ,

wherein the processor is further configured to:

control the transceiver circuit to transmit, through the first part of the plurality of patch antennas, the first signal during a first period, and

control the transceiver circuit to receive, through the second part of the plurality of patch antennas, the second signal during a second period, and

wherein the first period does not overlap with the second period.

10. The wireless power transmitting device of claim 8 ,

wherein the first part of the plurality of patch antennas is different from the second part of the plurality of patch antennas,

wherein the processor is further configured to receive, through the second part of the plurality of patch antennas, the second signal during a second period, and

wherein the second period is at least partially overlapped with a first period when the first signal is input to the first part of the plurality of patch antennas.

11. The wireless power transmitting device of claim 8 , wherein the processor is further configured to determine at least one of whether the target device is located within a power transmitting area, a position of the target device, a direction of the target device, a type of the target device, and a shape of the target device based on the second signal.

12. The wireless power transmitting device of claim 11 , wherein the processor is further configured to determine that the target device is located within the power transmitting area, based on a signal output from the second part of the plurality of patch antennas at a previous time interval being different from the second signal, or based on the magnitude of the second signal being equal to or greater than a predetermined threshold value.

13. The wireless power transmitting device of claim 12 , wherein, when it is determined that the target device is located within the power transmitting area, the processor is further configured to:

adjust at least one of a number of patch antennas included in the first part of the plurality of patch antennas and a number of patch antennas included in the second part of the plurality of patch antennas,

control the transceiver circuit to transmit, through the first part of the plurality of patch antennas including the adjusted number of patch antennas, a third signal provided from the power source,

control the transceiver circuit to receive, through the second part of the plurality of patch antennas including the adjusted number of patch antennas, a fourth signal based on a reflection of the third signal,

determine at least one of a position and direction of the target device based on the fourth signal, and

determine at least one of a type of the target device and a shape of the target device based on the fourth signal.

14. The wireless power transmitting device of claim 12 , wherein the processor is further configured to:

determine that the target device is to be charged based on a communication signal received from the target device, and

determine that the target device corresponds to an obstacle based on the communication signal being not received from the target device.

15. The wireless power transmitting device of claim 14 , wherein the processor is further configured to:

determine whether the target device corresponds to a human body, and

when the target device corresponds to the human body, output a warning.

16. The wireless power transmitting device of claim 8 , wherein the processor is further configured to:

in response to a first operation, set a number of the first part of the plurality of patch antennas and a number of the second part of the plurality of patch antennas, and

in response to switching from the first operation to a second operation, adjust at least one of the number of patch antennas included in the first part of the plurality of patch antennas and the number of patch antennas included in the second part of the plurality of patch antennas.

17. The wireless power transmitting device of claim 8 , wherein the processor is further configured to:

after outputting the second signal, control the transceiver circuit to transmit, through a part of the first part of the plurality of patch antennas, a third signal provided from the power source, and

control the transceiver circuit to receive a fourth signal based on a reflection of the third signal through the second part of the plurality of patch antennas and another part of the first part of the plurality of patch antennas.

18. The wireless power transmitting device of claim 17 , wherein the transceiver circuit further comprises a circulator, and

wherein the processor is further configured to:

control the transceiver circuit to release, through the circulator, a connection to an input terminal of the other part of the first part of the plurality of patch antennas, and

control the transceiver circuit to connect, through the circulator, to an output terminal of the other part of the first part of the plurality of patch antennas.

19. The wireless power transmitting device of claim 8 , wherein the transceiver circuit comprises at least one of a phase shifter configured to control phase of the first signal and the second signal by the processor, and an attenuator configured to control magnitudes of the first signal and the second signal by the processor.

20. The wireless power transmitting device of claim 19 , further comprising:

an oscillator configured to output a third signal; and

a mixer configured to modulate the third signal and demodulate the second signal,

wherein the transceiver circuit further comprises a first switch and a second switch, and

wherein the processor is further configured to:

control the transceiver circuit to connect, using the first switch, the third signal to at least one of the phase shifter and the attenuator, or

control the transceiver circuit to connect, using the first switch, the second signal to at least one of the phase shifter and the attenuator,

control the transceiver circuit to connect, to a first patch antenna using the second switch, a controlled signal output from at least one of the phase shifter and the attenuator, and

control the transceiver circuit to connect, to the mixer using the second switch, the controlled signal output from at least one of the phase shifter and the attenuator.