CASCADED COILS FOR MULTI-SURFACE COVERAGE IN NEAR FIELD COMMUNICATION

摘要

Described herein are techniques related to near field coupling and wireless power transfers. A device may include a cascaded coil antenna to include a first coil antenna that is connected in series with a second coil antenna. The first and second coil antennas are independent antennas prior to cascading and are located in different surfaces of the device to establish near field coupling through front side, top side, bottom side, or corner side of the portable device. Furthermore, a flux guide may be placed in the cascaded coil antenna to facilitate magnetic flux at the first coil antenna and the second coil antenna to induce current of the same phase during receive mode. During transmit mode, the flux guide facilitates the magnetic flux at the first coil antenna and the second coil antenna to generate magnetic fields of the same direction.

主权项

1. A device comprising:
at least one component defining top and bottom surfaces; a connecting wire; a cascaded coil antenna to include a first coil antenna and a second coil antenna that are connected in series through the connecting wire, wherein the first coil antenna is placed at the top surface and the second coil antenna is placed at the bottom surface of the at least one component; and a flux guide installed to cover top portion of the first coil antenna and spans to the other top portion of the second coil antenna, wherein the flux guide at receive mode is configured to generate magnetic flux at the first coil antenna and the second coil antenna to induce current of the same phase, and wherein the flux guide at transmit mode facilitates the magnetic flux at the first coil antenna and the second coil antenna to generate magnetic fields of the same direction.