Wafer-level integrated antenna array for wireless battery charging
Systems and methods are described for transmitting and receiving wireless power. In some embodiments, a wireless power transmission system comprises an antenna array comprising a plurality of antennas and a transceiver module configured to receive a plurality of beaconing signals via the antenna array from a wireless client during a beacon cycle. The system also comprises a controller configured to measure a phase of each of the plurality of beaconing signals and determine a transmit phase configuration for each of the antennas, and a transceiver module configured to send signals to the antenna array based on the transmit phase configuration for delivery of wireless power to the wireless client.
1. A wireless power transmission system comprising:
an antenna array comprising a plurality of antennas;
a transceiver module configured to receive a plurality of beaconing signals via the antenna array from a wireless client during a beacon cycle;
a controller configured to measure a phase of each of the plurality of beaconing signals and determine a transmit phase configuration for each of the antennas;
a phase-locked loop (PLL) configured to feed signals to the antenna array based on the transmit phase configuration for delivery of wireless power to the wireless client; and
a wafer onto which at least the transceiver module, the controller, and the antenna array are formed.
2. The wireless power transmission system of claim 1 , wherein the wafer includes: one layer, and another layer, and wherein:
the transceiver module is formed in the one layer of the wafer; and
the antenna array is formed in the another layer of the wafer.
3. The wireless power transmission system of claim 2 , wherein the one layer having the transceiver module wafer is wafer bonded to the another layer having the antenna array.
4. The wireless power transmission system of claim 2 , wherein a material of the one layer having the transceiver module wafer is different from a material of the another layer having the antenna array.
5. The wireless power transmission system of claim 1 , wherein the plurality of antennas comprises a plurality of antenna groups, each antenna group comprising a sub-group of the plurality of antennas.
6. The wireless power transmission system of claim 5 , wherein the plurality of antenna groups covers the entire surface of the wafer.
7. The wireless power transmission system of claim 5 , wherein each antenna group of the plurality of antenna groups is formed into a same shape.
8. The wireless power transmission system of claim 7 , wherein the shape is a hexagon.
9. The wireless power transmission system of claim 1 , wherein the plurality of antennas is configured to transmit the signals at a wavelength in a microwave frequency region.
10. The wireless power transmission system of claim 9 , wherein the plurality of antennas is configured to transmit the signals at 60 gigahertz.
11. The wireless power transmission system of claim 1 , wherein the plurality of antennas is configured to transmit the signals at a wavelength in a terahertz frequency region.
12. The wireless power transmission system of claim 1 wherein the PLL is formed onto the wafer.