Title:
FILTER DEVICE, MULTIPLEXER, HIGH FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/151218
Kind Code:
A1
Abstract:
A filter (10) is provided with: a series arm resonant circuit (11) connected between input and output terminals (110) and (120); and a parallel arm resonant circuit (12) connected between a node (x1) on a path connecting the input and output terminals (110) and (120) and ground. The series arm resonant circuit (11) is provided with a series arm resonator (s1) having a greater fractional bandwidth than a fractional bandwidth of the parallel arm resonant circuit (12), and a capacitor (C1) connected to the series arm resonator (s1).
Inventors:
NOSAKA KOJI (JP)
Application Number:
PCT/JP2018/005281
Publication Date:
August 23, 2018
Filing Date:
February 15, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/145; H03H9/72
Domestic Patent References:
| WO2014034492A1 | 2014-03-06 | |||
| WO2005076473A1 | 2005-08-18 |
Foreign References:
| JPH09167937A | 1997-06-24 | |||
| JP2013225945A | 2013-10-31 | |||
| JP2012175594A | 2012-09-10 | |||
| JP2005295496A | 2005-10-20 | |||
| JP2016220263A | 2016-12-22 | |||
| JP2006254281A | 2006-09-21 | |||
| JPS6164760U | 1986-05-02 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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