US 12,395,014 B2
In-body wireless charging system
Xiaoran Fan, New Brunswick, NJ (US); and Richard Howard, New Brunswick, NJ (US)
Assigned to RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY, New Brunswick, NJ (US)
Appl. No. 17/778,645
Filed by Rutgers, The State University of New Jersey, New Brunswick, NJ (US)
PCT Filed Nov. 12, 2020, PCT No. PCT/US2020/060194
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2021/101783, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/938,051, filed on Nov. 20, 2019.
Prior Publication US 2023/0028864 A1, Jan. 26, 2023
Int. Cl. H02J 50/23 (2016.01); H02J 50/40 (2016.01); H04B 7/06 (2006.01)
CPC H02J 50/23 (2016.02) [H02J 50/40 (2016.02); H04B 7/0617 (2013.01); H02J 2310/23 (2020.01)] 24 Claims
OG exemplary drawing
 
1. A far-field wireless charging system, comprising:
a plurality of slave radios located about an area, each slave radio configured for transmitting a respective spread spectrum (SS) modulated radio wave within the area, and for adapting a time-offset of the radio wave in response to a control signal; and
a leader radio, configured for receiving backscatter radio energy from a target device within the area, for receiving SS modulated radio waves from slave radios, and for generating slave radio control signals;
the leader radio, in a time synchronization mode of operation, configured for determining changes in received power associated with radio wave transmissions of at least a portion of the plurality of slave radios and responsively interacting with the slave radios to modify respective radio wave transmission times such that slave radio wave transmissions are received at the leader radio in a substantially synchronized manner to thereby achieve beamforming at the leader radio;
the leader radio, in a charging mode of operation, is configured for determining changes in received power associated with backscatter radio energy received from a target device and responsively interacting with the slave radios to modify respective radio wave transmission times such that slave radio wave transmissions are received at the target device in a substantially synchronized manner to thereby achieve beamforming at the target device.