Title:
NEAR-FIELD WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/008223
Kind Code:
A1
Abstract:
A near-field wireless communication device (10) comprises a receiver circuit (101), a power receiving circuit (102), a near-field wireless communication IC (40), a rectifier circuit (50), and a load circuit (60). The receiver circuit (101) and the power receiving circuit (102) have a common circuit section including a coil (20), a capacitor (21), and a capacitor (22). The coil (20) and the capacitor (21) form a first parallel resonant circuit. The coil (20), the capacitor (21), and the capacitor (22) form a second parallel-series resonant circuit. The first parallel resonant circuit and the second parallel-series resonant circuit function as impedance adjustment circuits, whereby an output impedance (Zo101) of the receiver circuit (101) is adjusted to be greater than or equal to a first predetermined value for implementing load modulation, and an output impedance (Zo102) of the power receiving circuit (102) is adjusted to be less than or equal to a second predetermined value for implementing power supply. Thus, operation of both the receiver circuit (101) and the power receiving circuit (102) is implemented.
Inventors:
HOSOTANI TATSUYA (JP)
NAGAI TAKAHIRO (JP)
NAGAI TAKAHIRO (JP)
Application Number:
PCT/JP2022/027792
Publication Date:
February 02, 2023
Filing Date:
July 15, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B5/02
Domestic Patent References:
| WO2017145879A1 | 2017-08-31 | |||
| WO2021140692A1 | 2021-07-15 | |||
| WO2021131128A1 | 2021-07-01 |
Foreign References:
| JP2011134049A | 2011-07-07 | |||
| JP5013019B1 | 2012-08-29 | |||
| JP5077476B1 | 2012-11-21 | |||
| JP5168404B1 | 2013-03-21 | |||
| JP6244538B2 | 2017-12-13 | |||
| US10176415B2 | 2019-01-08 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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