US 12,362,599 B2
Wireless power transmission system and power receiver
Hiromasa Saeki, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Dec. 4, 2023, as Appl. No. 18/528,334.
Application 18/528,334 is a continuation of application No. PCT/JP2022/027673, filed on Jul. 14, 2022.
Claims priority of application No. 2021-118873 (JP), filed on Jul. 19, 2021.
Prior Publication US 2024/0106277 A1, Mar. 28, 2024
Int. Cl. H02J 50/12 (2016.01); H02J 50/00 (2016.01); H02J 50/40 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/005 (2020.01); H02J 50/402 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A wireless power transmission system comprising:
a structure surrounded as a whole by an electromagnetic wave-shielding member having an appropriate conductivity;
at least one power transmission unit; and
at least one power reception unit, the wireless power transmission system being configured to use a resonant mode in the structure,
wherein
the power reception unit includes a power receiver including a dielectric substrate, a helical antenna on the dielectric substrate, a rectifier circuit, and a power reception antenna,
wherein the power reception antenna includes a power reception antenna line in a same plane on the dielectric substrate,
one end of the power reception antenna line is connected to the rectifier circuit,
of the power reception antenna line, another end different from the one end connected to the rectifier circuit is an open end,
a planar shape of the dielectric substrate is a 2N-sided polygon with line symmetry, where N is an integer of two or more,
the power reception antenna line is along N sides that are adjacent to and different from each other of the dielectric substrate, and
the helical antenna is electrically connected to the power reception antenna line at the other end of the power reception antenna line or in a vicinity of the other end.