US 12,348,055 B2
Wireless-power transmitting device for creating a uniform near-field charging area
Sohini Sengupta, Milpitas, CA (US); Yunhong Liu, San Jose, CA (US); and Tuomo Katajamaki, San Jose, CA (US)
Assigned to Energous Corporation, San Jose, CA (US)
Filed by Energous Corporation, San Jose, CA (US)
Filed on Sep. 13, 2023, as Appl. No. 18/466,624.
Application 18/466,624 is a continuation of application No. 17/228,621, filed on Apr. 12, 2021, granted, now 11,799,324.
Claims priority of provisional application 63/009,361, filed on Apr. 13, 2020.
Prior Publication US 2024/0079910 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02J 50/20 (2016.01); H02J 50/40 (2016.01); H01Q 9/04 (2006.01); H01Q 9/16 (2006.01); H01Q 9/42 (2006.01)
CPC H02J 50/20 (2016.02) [H02J 7/0042 (2013.01); H02J 7/02 (2013.01); H02J 50/402 (2020.01); H01Q 9/0407 (2013.01); H01Q 9/16 (2013.01); H01Q 9/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A near-field charging system for increasing a usable wireless charging area available to a wireless-power receiver, the near-field charging system comprising:
a wireless-power receiver and
a wireless-power transmitter including:
a charging surface,
a radiating antenna, and
a non-radiating element positioned above the radiating antenna within the wireless-power transmitter such that the non-radiating element is closer to the charging surface than the radiating antenna,
wherein:
the radiating antenna is configured to produce a first electromagnetic field distribution that is configured to be received by the wireless-power receiver placed on the charging surface of the wireless-power transmitter, the first electromagnetic field distribution being configured to provide at least 200 milliwatts of usable power to the wireless-power receiver when the wireless-power receiver is placed at any position on a first portion of the charging surface of the wireless-power transmitter;
the non-radiating element is configured to change a distribution characteristic of the first electromagnetic field distribution to produce a second electromagnetic field distribution, the second electromagnetic field distribution being configured to provide at least 200 milliwatts of usable power to the wireless-power receiver when the wireless-power receiver is placed at any position across a second portion of the charging surface of the wireless-power transmitter, further wherein the second portion is at least 10% percent greater than the first portion.