FILTER DEVICE

WIPO Patent Application WO/2022/092315

A1

Provided is a filter device capable of widening a pass band while improving power resistance. The filter device comprises: a first filter that includes a first input terminal, a first output terminal, first series arms in which a plurality of first series arm resonators are arranged, and a plurality of first parallel arms in which first parallel arm resonators are respectively arranged and which are connected to the first series arms, and has a pass band in a predetermined frequency band; a second filter that includes a second input terminal, a second output terminal, second series arms in which a plurality of second series arm resonators are arranged, and a plurality of second parallel arms in which second parallel arm resonators are respectively arranged and which are connected to the second series arms, and has a pass band in a predetermined frequency band; a substrate on which the first filter and the second filter are formed; and an inductor connected between a ground terminal and a parallel arm resonator included in at least one parallel arm among the plurality of first parallel arms and the plurality of second parallel arms.

KONDO SEIMA (JP)
TANAKA SATOSHI (JP)
YAMAMOTO YASUHISA (JP)

PCT/JP2021/040267

May 05, 2022

November 01, 2021

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MURATA MANUFACTURING CO (JP)

H03H9/17; H03H9/58; H03H9/64

WO2015040922A1	2015-03-26
WO2016056377A1	2016-04-14

JP2001223554A	2001-08-17
JP2003347889A	2003-12-05
JP2001223559A	2001-08-17

INABA, Yoshiyuki et al. (JP)

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