Title:
FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/199543
Kind Code:
A1
Abstract:
Provided is a filter device with which it is possible to improve isolation characteristics and to easily adjust a coupling coefficient. A filter device 1 is provided with: an antenna terminal 3 connected to an antenna; a plurality of first inductors L1a, L1b that are connected between the antenna terminal 3 and a ground potential, and are divided in parallel; and first and second elastic wave filters 2a, 2b (a plurality of bandpass-type filters) that are commonly connected to the antenna terminal 3, and that each has a second inductor L2a, L12b. The plurality of first inductors L1a, L1b and the plurality of second inductors L2a, L12b are each primarily electromagnetic-field coupled one to one.
Inventors:
KONAKA YOHEI (JP)
Application Number:
PCT/JP2017/008840
Publication Date:
November 23, 2017
Filing Date:
March 06, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/25; H03H9/64; H03H9/70
Domestic Patent References:
WO2016056377A1 | 2016-04-14 | |||
WO2007102560A1 | 2007-09-13 | |||
WO2015104882A1 | 2015-07-16 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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