Intelligent multi-mode wireless power transmitter system
A device including a processor configured to identify a power receiving device and to determine a range configuration relative to the power receiving device is provided. The device also includes a first antenna configured to emit a propagating radiation at a selected frequency and in a selected direction, and a first power transmitting circuit configured to provide a signal at the selected frequency to the first antenna when the processor identifies the power receiving device within a far field configuration from the device. The device also includes a plate, configured to couple a ground terminal of the first power transmitting circuit with the first antenna and including a planar surface and at least an extension angled in a direction of increased directivity of the propagating radiation. Methods for fabricating and using a device as above are also provided.
1. A device for wirelessly transferring charging or operating power to a load coupled to a power receiving device, comprising:
a processor configured to identify the power receiving device and to determine a range configuration relative to the power receiving device;
a first antenna comprising a dielectric surrounding a coiled conductor configured to emit a propagating radiation at a selected frequency and in a selected direction;
a first power transmitting circuit having a ground terminal and configured to provide a power signal at the selected frequency to the first antenna when the processor identifies the power receiving device within a far field configuration from the device; and
a plate configured to couple the ground terminal of the first power transmitting circuit with the first antenna and comprising a planar surface substantially parallel to the first antenna and at least an extension from the planar surface angled in a direction of the propagating radiation.
2. The device of claim 1 , further comprising a second antenna configured to generate an inductively coupled field at a second frequency to provide power to the power receiving unit when the processor identifies the power receiving device within a near field configuration from the device, wherein the second antenna comprises an inductive coil and receives the power from a second power transmitting circuit.
3. The device of claim 1 , further comprising an indicator configured to indicate whether the device is operating in a first power transfer mode or in a second power transfer mode based on the range configuration determined by the processor.
4. The device of claim 1 , further comprising a matching network switch coupled with the first power transmitting circuit and configured to provide multiple power signals at multiple frequencies within a selected bandwidth for the first antenna, wherein each of the multiple power signals is directed to a different power receiving unit.
5. The device of claim 1 , wherein the plate is a multilayer stack comprising two trace layers separated by a power plane, and a ground layer coupled with a ground terminal in the first power transmitting circuit.
6. The device of claim 1 , wherein the first antenna comprises a ceramic dielectric surrounding the coiled conductor.
7. The device of claim 1 , wherein the first antenna comprises a planar inverted-F antenna laid on a plane perpendicular to the planar surface of the plate.
8. The device of claim 1 , wherein the first antenna comprises a monopole antenna including a conducting extension laid on a plane perpendicular to the planar surface of the plate.
9. The device of claim 1 , wherein the extension of the plate is angled in a direction of increased directivity in opposite directions.
10. The device of claim 1 , wherein the extension of the plate is angled in a direction of increased directivity in at least two propagating directions.
11. The device of claim 1 , wherein the extension of the plate is angled in a direction of increased directivity having a hemispherical breadth in a direction orthogonal to a plane of the first antenna.
12. The device of claim 1 , wherein the first antenna and the plate form a first antenna assembly, the first antenna assembly mounted on a rotational mount having a rotation axis in the planar surface of the plate, and wherein the rotational mount is configured to rotate about the rotation axis to rotate the first antenna assembly in a plane substantially orthogonal to the planar surface of the plate.