Title:
NEAR-FIELD WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/008224
Kind Code:
A1
Abstract:
This near-field wireless communication device (10) comprises a power-receiving coil (22), a reception antenna (21), a reception circuit (101), a power-receiving circuit (102), a near-field wireless communication IC (40), and a rectification circuit (50). The reception antenna (21) receives a wireless communication signal using rear-field wireless. The power-receiving coil (22) receives power supply using near-field wireless. The power-receiving circuit (102) forms a series resonance circuit with the power-receiving coil (22) and a capacitor (32). The reception circuit (101) is configured to include the reception antenna (21). At a communication frequency (fc), the output impedance (Zo101) of the reception circuit (101) is greater than the output impedance (Zo102) of the power-receiving circuit (102). At a power-receiving frequency (fp), the output impedance (Zo102) of the power-receiving circuit (102) is less than the output impedance (Zo101) of the reception circuit (101).
More Like This:
Inventors:
KAIWA KOYO (JP)
HOSOTANI TATSUYA (JP)
NAGAI TAKAHIRO (JP)
HOSOTANI TATSUYA (JP)
NAGAI TAKAHIRO (JP)
Application Number:
PCT/JP2022/027793
Publication Date:
February 02, 2023
Filing Date:
July 15, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B5/02
Domestic Patent References:
| WO2021140692A1 | 2021-07-15 | |||
| WO2017145879A1 | 2017-08-31 | |||
| WO2021131128A1 | 2021-07-01 |
Foreign References:
| JP2011134049A | 2011-07-07 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
Download PDF: