Title:
FILTER DEVICE AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2018/003378
Kind Code:
A1
Abstract:
A filter device (2) is provided with: a first filter (20) configured from series resonators and parallel resonators; a first inductor (L1) connected in parallel between a first terminal (11) and the first filter (20); a second inductor (L2) inserted in series between the first filter (20) and a second terminal (12); and a third inductor (L3) that is inserted in series into a path connecting the parallel resonators and a ground to each other. The third inductor (L3) is incorporated in a multilayer substrate (60), the first filter (20) is mounted on a main surface (60a) of the multilayer substrate (60) by being incorporated in a filter chip (40), and the first inductor (L1) and the second inductor (L2) are chip-like inductors each having a coil-shaped conductor, said first inductor and second inductor being mounted on the main surface (60a) of the multilayer substrate (60) such that the inductors are adjacent to each other on the side of the filter chip (40), and coil axes (A1, A2) are orthogonal to each other.
Inventors:
MUKAI TAKAO (JP)
Application Number:
PCT/JP2017/020134
Publication Date:
January 04, 2018
Filing Date:
May 30, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/72; H01F17/00; H01F27/00; H03H7/46
Domestic Patent References:
| WO2015098240A1 | 2015-07-02 | |||
| WO2012176576A1 | 2012-12-27 |
Foreign References:
| JP2015089097A | 2015-05-07 | |||
| JP2006279604A | 2006-10-12 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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