Wireless power transmission system
The wireless power transmission is a system for providing wireless charging and/or primary power to electronic/electrical devices via microwave energy. The microwave energy is focused to a location by a power transmitter having one or more adaptively-phased microwave array emitters. Rectennas within the device to be charged receive and rectify the microwave energy and use it for battery charging and/or for primary power.
1. A method for selectively converting electromagnetic energy received by an antenna to a direct current, the method comprising:
receiving, by the antenna from a phased array antenna of a wireless power transmitter, one or more first power transmission signals of the electromagnetic energy being transmitted at respective first phases determined by detecting or calculating a complex conjugate of a phase of a first calibration signal;
transmitting, by the antenna, a second calibration signal to the wireless power transmitter based on the one or more first power transmission signals; and
selectively converting one or more second power transmission signals of the electromagnetic energy received by the antenna from the phased array antenna of the wireless power transmitter to the direct current.
2. The method of claim 1 , further comprising:
transmitting, by the antenna, the first calibration signal to the wireless power transmitter.
3. The method of claim 1 , further comprising:
receiving the one or more second power transmission signals being transmitted at respective second phases determined by the second calibration signal.
4. The method of claim 1 , further comprising:
providing, by a circuitry electrically coupled to the antenna, the direct current to a device.
5. The method of claim 1 , further comprising:
determining a delay; and
transmitting a third calibration signal to the wireless power transmitter with the delay.
6. The method of claim 5 , further comprising:
increasing the delay when a power level of the one or more first power transmission signals and the one or more second power transmission signals are within a predetermined threshold.
7. The method of claim 1 , wherein the first phases comprise a phase angle within a margin of deviation from a complex conjugate of a phase of the first calibration signal.
8. The method of claim 1 , wherein the first phases comprise a plus thirty-six (36) degrees of less of a complex conjugate of a phase of the first calibration signal.
9. The method of claim 1 , wherein the first phases comprise a minus thirty-six (36) degrees of less of a complex conjugate of a phase of the first calibration signal.
10. A system for selectively converting electromagnetic energy to a direct current, the system comprising:
an antenna configured to:
receive, from a phased array antenna of a wireless power transmitter, one or more first power transmission signals of the electromagnetic energy being transmitted at respective first phases determined by detecting or calculating a complex conjugate of a phase of a first calibration signal; and
transmit a second calibration signal to the wireless power transmitter based on the one or more first power transmission signals,
wherein the system is configured to selectively convert one or more second power transmission signals of the electromagnetic energy received by the antenna from the phased array antenna of the wireless power transmitter to the direct current.
11. The system of claim 10 , wherein the antenna is configured to transmit the first calibration signal to the wireless power transmitter.
12. The system of claim 10 , wherein the antenna is configured to receive the one or more second power transmission signals being transmitted at respective second phases determined by the second calibration signal.
13. The system of claim 10 , further comprising:
a circuitry electrically coupled to the antenna,
wherein the circuitry is configured to provide the direct current to a device.
14. The system of claim 1 , wherein the system is configured to:
determine a delay; and
transmit a third calibration signal to the wireless power transmitter with the delay.
15. The system of claim 14 , wherein the system is configured to:
increasing the delay when a power level of the one or more first power transmission signals and the one or more second power transmission signals are within a predetermined threshold.
16. The system of claim 10 , wherein the first phases comprise a phase angle within a margin of deviation from a complex conjugate of a phase of the first calibration signal.
17. The system of claim 10 , wherein the first phases comprise a plus thirty-six (36) degrees of less of a complex conjugate of a phase of the first calibration signal.
18. The system of claim 10 , wherein the first phases comprise a minus thirty-six (36) degrees of less of a complex conjugate of a phase of the first calibration signal.