公开(公告)号：US20220029462A1

公开(公告)日：2022-01-27

申请号：US17497934

申请日：2021-10-09

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Songnan Yang ,  Ning Pan

IPC: H02J50/20 ,  H04B7/06 ,  H02J50/40 ,  H02J50/80 ,  H02J7/00

Abstract: Techniques and apparatus are described for use in far-field wireless power transmitter. A far-field wireless power transmitter uses beamforming to localize a power signal transmitted from an array of antenna. A multi-tone signal is used for the power signal, where the signal transmitted from each of the antenna is formed of a plurality of tones having a frequency center and separated by a uniform frequency difference, and relative delays and/or relative amplitude differences are introduced into the signals from the different antennas of the array so that a beam is formed in a region where a far-field wireless power receiver's antenna is located. By use of two such transmitters placed to either side of the receiver, a hot-spot for the multi-tone power signal can be formed in the region of the receiver's antenna, with lower field values away from the region.