Title:
FILTER CIRCUIT MODULE, FILTER CIRCUIT ELEMENT, FILTER CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/170708
Kind Code:
A1
Abstract:
A filter circuit module (201) is composed of a filter circuit element (101), a circuit board (90) on which the filter circuit element (101) is mounted, and a first inductor. The filter circuit element (101) includes a resonant circuit capacitor (C10), which is a part of an LC parallel resonant circuit, and a phase-shift circuit, and the circuit board (90) is provided with a second inductor (L10). The phase-shift circuit includes a primary coil (L1) and a secondary coil (L2) which, when viewed in a winding axis (WA) direction, overlap the second inductor (L10). The resonant circuit capacitor (C10) is disposed closer to a mounting surface side of the circuit board (90) than the primary coil (L1) and the secondary coil (L2). The resonant circuit capacitor (C10) includes capacitor electrodes which, when viewed in the winding axis (WA) direction, cover a coil opening of the primary coil (L1) and a coil opening of the secondary coil (L2).
Inventors:
SHIGEMATSU SATOSHI (JP)
ISHIZUKA KENICHI (JP)
ISHIZUKA KENICHI (JP)
Application Number:
PCT/JP2020/002322
Publication Date:
August 27, 2020
Filing Date:
January 23, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F17/00; H01F27/00; H01G4/40; H03H7/03; H03H7/09; H04B1/40
Domestic Patent References:
| WO2017002661A1 | 2017-01-05 | |||
| WO2016114181A1 | 2016-07-21 |
Foreign References:
| JP2002100947A | 2002-04-05 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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