WIRELESS POWER RECEPTION DEVICE WITH SHORT-RANGE WIRELESS COMMUNICATION FUNCTION

WIPO Patent Application WO/2021/140692

A1

This wireless power reception device with a short-range wireless communication function comprises: a communication antenna (11) which is for short-range wireless communication and which is disposed on a flat surface; an interface circuit which is connected to the communication antenna (11) and passes a signal for short-range wireless communication; a wireless communication IC which is connected to the interface circuit and processes the signal for short-range wireless communication; a power reception coil (21L) disposed on the flat surface; a resonance capacitor constituting a power reception resonance circuit together with the power reception coil (21L); and a rectifying/smoothing circuit connected to the power reception resonance circuit. The power reception resonance circuit resonates at the frequency of the short-range wireless communication. The resonance current flowing through the power reception resonance circuit causes current to flow to the power reception coil (21L), and a magnetic path of a main magnetic flux generated in the vicinity of the current flow is separated from a magnetic path where a magnetic flux for short-range wireless communication interlinks with the communication antenna (11).

HOSOTANI TATSUYA (JP)
NAGAI TAKAHIRO (JP)

PCT/JP2020/028969

July 15, 2021

July 29, 2020

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MURATA MANUFACTURING CO (JP)

H01F38/14; H02J7/00; H02J50/12

WO2014167881A1	2014-10-16
WO2017094355A1	2017-06-08

JP2012110154A

2012-06-07

KAEDE PATENT ATTORNEYS' OFFICE (JP)

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