FILTER DEVICE, HIGH FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS

WIPO Patent Application WO/2018/105193

A1

A filter (11) is provided with: a first resonance circuit (110) having at least one first resonance frequency and a second resonance circuit (120) having at least one second resonance frequency different from the first resonance frequency; and switches (SW11, SW12) connected to the first resonance circuit (110) and the second resonance circuit(120), respectively, wherein the switches (SW11, SW12) perform switching between a first state where a high frequency signal having the first resonance frequency is sent from an IN terminal (101) to an OUT terminal (102) via the first resonance circuit (110) and a high frequency signal having the second resonance frequency is sent from the IN terminal (101) to the ground via the second resonance circuit (120), and a second state where a high frequency signal having the first resonance frequency is sent from the IN terminal (101) to the ground via the first resonance circuit (110) and a high frequency signal having the second resonance frequency is sent from the IN terminal (101) to the OUT terminal (102) via the second resonance circuit (120).

MORI HIROTSUGU (JP)
NOSAKA KOJI (JP)

PCT/JP2017/033271

June 14, 2018

September 14, 2017

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MURATA MANUFACTURING CO (JP)

H03H9/64; H03H7/01; H04B1/50

WO2016158953A1	2016-10-06
WO2013080428A1	2013-06-06

US5317290A	1994-05-31
JP2005508117A	2005-03-24
JP2009207116A	2009-09-10
JP2000323961A	2000-11-24

YOSHIKAWA, Shuichi et al. (JP)

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