MULTIPLEXER, HIGH FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE

WIPO Patent Application WO/2018/168655

A1

This multiplexer (1) is provided with: a filter (10) which is connected to a common terminal (110c); and a filter (20) which is connected to the common terminal (110c) and has a passband on the higher frequency side than the passband of the filter (10). The filter (10) is provided with: a series arm circuit (11) which is provided on a path that connects an input/output terminal (110) and an input/output terminal (120); and a parallel arm circuit (12) which is connected to the ground and a node on the path. The parallel arm circuit (12) has a resonant frequency on the lower frequency side than the low end frequency of the passband of the filter (10). The series arm circuit (11) is provided with: a series arm resonator (s1a) which has a resonant frequency within the passband of the filter (10); and a series arm resonator (s1b) which is connected in parallel with the series arm resonator (s1a) and has a resonant frequency on the higher frequency side than the high end frequency of the passband of the filter (10).

NOSAKA KOJI (JP)

PCT/JP2018/009054

September 20, 2018

March 08, 2018

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MURATA MANUFACTURING CO (JP)

H03H9/72; H03H9/64; H04B1/00; H04B1/40

WO2015119176A1	2015-08-13
WO2015099105A1	2015-07-02
WO2012086639A1	2012-06-28
WO2015022931A1	2015-02-19

JP2008271511A	2008-11-06
JP2010109894A	2010-05-13
JP2007074459A	2007-03-22
JP2016054374A	2016-04-14
JP2009207116A	2009-09-10
JP2000323961A	2000-11-24
JP2015531221A	2015-10-29
JP2016136687A	2016-07-28
JP2017017520A	2017-01-19

YOSHIKAWA, Shuichi et al. (JP)

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