Simplified wireless power receiver architecture

1. A wireless power receiver apparatus comprising:

a radio frequency (RF) transceiver including at least one antenna and a beacon signal generator;

energy harvester circuitry coupled to the RF transceiver; and

control circuitry coupled to: the RF transceiver, and the energy harvester circuitry, w herein the control circuitry is operable to cause the RF transceiver to:

establish a connection with a wireless power transmitter (WPT);

generate, at a beacon frequency (f B ), a beacon signal using the beacon signal generator;

transmit, in a first time period, the beacon signal to the WPT; and

receive, in response to the beacon signal and in a second time period different from the first time period, a wireless power signal at a power frequency (f p ) transmitted by the WPT;

measure a duration of the wireless power signal received from the WPT; and

change the f B at which the beacon signal is transmitted according to the measured duration.

2. The wireless power receiver apparatus of claim 1 , wherein:

the RF transceiver includes a beacon coding module coupled to: the beacon signal generator, and the at least one antenna; and

the control circuitry is further operable to cause the RF transceiver to encode the beacon signal using the beacon coding module for transmission, via the at least one antenna, to the WPT.

3. The wireless power receiver apparatus of claim 2 , further comprising an identification (ID) module coupled to the control circuitry, wherein the ID module stores a client ID that uniquely identifies the wireless power receiver apparatus to the WPT.

4. The wireless power receiver apparatus of claim 3 , wherein the control circuitry is operable to cause the RF transceiver to encode, using the beacon coding module, the client ID into the beacon signal.

5. The wireless power receiver apparatus of claim 1 , further comprising a means for interfacing the energy harvester circuitry for delivering a flow of electric current to one or more electronic components of a client device or system associated with the wireless power receiver apparatus.

6. The wireless power receiver apparatus of claim 5 , further comprising at least one power converter coupled to the means for interfacing, and configured to deliver a voltage regulated flow of electric current to the one or more electronic components of the client device or system.

7. The wireless power receiver apparatus of claim 1 , further comprising a data interfacing means coupled to at least one of: the energy harvester circuitry, and the control circuitry, and configured to transmit or receive a data signal to or from one or more electronic devices of a client device or system associated with the wireless power receiver apparatus.

8. A wireless power transmission system, comprising:

an antenna array having multiple radio frequency (RF) transceivers; and

control circuitry in communication with: the antenna array, and a memory storage device, wherein the control circuitry is configured to:

monitor a wireless power transmission environment to detect a beacon signal transmitted at a beacon frequency (f B ) by a wireless power receiver client (WPRC), wherein the beacon signal encodes identifying information of the WPRC;

change a duration at which the antenna array transmits a wireless power signal from a first duration to a second duration different from the first duration;

responsive to the change from the first duration to the second duration, cause the WPRC to change the f B from a first f B to a second f B , respectively, wherein the first f B is different from the second f B ;

in response to detecting the beacon signal, determine whether the identifying information matches an entry stored in the memory storage device; and

for the identifying information matching an entry stored in the memory storage device, direct the antenna array to transmit, for the first duration, the wireless power signal to the WPRC, or

for the identifying information not matching an entry stored in the memory storage device, direct the antenna array to transmit, for the second duration, the wireless power signal to the WPRC to cause the WPRC to transmit, at the second f B , another beacon signal encoding additional identifying information of the WPRC.

9. The wireless power transmitter system of claim 8 , wherein the first duration is greater than the second duration.

10. A method in a wireless power receiver, comprising:

establishing, via at least one antenna of a radio frequency (RF) transceiver of the wireless power receiver, a connection with a wireless power transmitter (WPT);

transmitting, via the at least one antenna in a first time period, a beacon signal at a beacon frequency (f B ) to the WPT;

receiving, in response to the beacon signal and via the at least one antenna in a second time period different from the first time period, a wireless power signal at a power frequency (f p ) transmitted by the WPT;

measuring a duration of the wireless power signal received from the WPT; and

changing the f B at which the beacon signal is transmitted according to the measuring.

11. The method of claim 10 , further comprising causing energy harvester circuitry of the wireless power receiver to deliver at least a portion of energy of the wireless power signal to an energy storage device.

12. The method of claim 11 , further comprising:

causing the RF transceiver to transduce energy of the wireless power signal into an alternating current (AC) signal;

transmitting the AC signal from the RF transceiver to a rectifier of the energy harvester circuitry; and

causing the energy harvester circuitry to deliver electric power to the energy storage device as a direct current (DC) signal.

13. The method of claim 10 , wherein transmitting the beacon signal comprises transmitting: a timing beacon signal, and a phase beacon signal, to the WPT.

14. The method of claim 10 , further comprising:

performing a clear channel assessment (CCA) to determine whether an RF medium of a wireless power delivery environment in which the wireless power receiver is situated is idle.

15. The method of claim 14 , further comprising:

in response to determining that the RF medium is idle:

causing the RF transceiver to transmit, via the at least one antenna, a short timing beacon, and a phase beacon, to the wireless power delivery environment; and

monitoring the f p for the wireless power signal; or

in response to determining that the RF medium is not idle:

causing the RF transceiver to wait for a predetermined amount of time; and

performing the CCA for at least one iteration.

16. The method of claim 10 , further comprising controlling communication or processing actions of the wireless power receiver according to the measured duration.

17. The wireless power receiver apparatus of claim 1 , further comprising an energy storage device coupled to: the energy harvester circuitry, and the control circuitry, wherein the control circuitry is further operable to:

determine a power level of the energy storage device; and

cause the energy harvester circuitry to deliver at least a portion of energy of the wireless power signal to the energy storage device for storage therein.

18. The wireless power receiver apparatus of claim 1 , wherein to transmit the beacon signal to the WPT, the control circuitry is further operable to:

generate and transmit the beacon signal at a first f B in response the wireless power signal being measured at a first duration; or

generate and transmit the beacon signal at a second f B different from the first f B in response to the wireless power signal being measured at a second duration different from the first duration.

19. The wireless power transmission system of claim 8 , wherein, by the change in duration at which the antenna array transmits a wireless power signal from the first duration to the second duration, the control circuitry is further configured to cause the wireless power transmission system and the WPRC to occupy a new channel for wireless power transmission.

20. The method of claim 10 , wherein transmitting the beacon signal comprises:

transmitting the beacon signal at a first f B in response to measuring the wireless power signal at a first duration; or

transmitting the beacon signal at a second f B different from the first f B in response to measuring the wireless power signal at a second duration different from the first duration.